| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 091468000 |
Self-acting valve (432) (446) (451) (452)
| 18 |
| 091459000 |
Electrically operated (275) (361)
| 12 |
| 091444000 |
Relatively movable serial valves
| 11 |
| 091462000 |
For double-acting motor
| 6 |
| 091433000 |
Both inlet and exhaust controlled by motive fluid pressure in supply line or chamber | 5 |
| 20090013860 | PNEUMATIC MULTI-WEIGHT BALANCING DEVICE - A load balancing pneumatic manipulator comprising an inflatable reservoir for establishing via an amplifier a pressure within a lift cylinder that is sufficient to balance the weight of an object being lifted. The reservoir is inflated and deflated by inflation and deflation valves, respectively, that may be operated from an operator control center proximal an end effector of the manipulator. The valves may be actuated via pushbuttons or actuated in a mutually exclusively fashion via a neutrally biased reciprocating actuator. The manipulator advantageously allows loads of different weights to be lifted in a semi-automatic fashion with operator involvement to select the load balancing pressure. The manipulator further comprises an air release system that closes a blocking valve in the event of release of the object being lifted and optionally in the event of a loss of air supply pressure. The pressure within the lift cylinder is thereby preserved and can be vented at different rates, depending upon the condition causing closure of the blocking valve. | 01-15-2009 |
| 20090031891 | Hydraulic circuit for rapid bucket shake out - A hydraulic circuit is disclosed. The hydraulic circuit may have a variable displacement pump. The variable displacement pump may have a fluidic displacement control configured to vary a flow of pressurized fluid based on a fluid signal and an electronic displacement control configured to vary the flow of pressurized fluid based on an electronic signal. The flow of pressurized fluid may be controlled by the one of the fluidic and electronic displacement controls that requests the smallest flow of pressurized fluid. The hydraulic circuit may also have a control valve connected between the pump and the fluidic displacement control, and the control valve may be configured to transmit the fluid signal to the fluidic displacement control. The hydraulic circuit may further have a controller configured to transmit a fluid signal to cause the fluidic control to request a maximum flow of pressurized fluid, and transmit an electronic signal requesting a flow smaller than the maximum flow, which causes the electronic displacement control to vary the flow of pressurized fluid. | 02-05-2009 |
| 20110185888 | ARRANGEMENT FOR HYDRAULIC ECCENTRIC ADJUSTMENT TO SET A PREDEFINED DISPLACEMENT FOR A HYDROSTATIC MOTOR - An arrangement for a hydraulic eccentric adjustment for setting a predetermined displacement volume in a hydrostatic motor and, in particular a radial piston motor ( | 08-04-2011 |
| 20120325080 | Gas boosters - One or more examples of the gas boosters described herein aim to provide a light weight gas booster configured to produce high output pressure levels at high volumes. Generally described, one or more examples of the gas boosters reduce the dead volume in a piston assembly, thereby increasing the ratio of the output pressure to the input pressure. In that regard, several examples of the gas boosters disclosed herein have a first check valve as a disk-type check valve or the like and a second check valve as a ball-type check valve or the like. Furthermore, one or more examples include an inwardly acting cam configured to convert rotary motion to reciprocating motion by an inner surface thereof. | 12-27-2012 |
| 20140196601 | Uniflow Steam Engine - Improvements to the steam engine for the purpose of small scale generation of electricity using biomass fuels and for co-generation of heat and electricity using biomass fuels in both developed and less developed countries are described. The engine is particularly well adapted to co-generation where the thermal load, as in building heating and many process applications, is extremely variable, because of its ability to operate efficiently under partial load. For the same reason, it would be suited to solar generated steam. Experiments have been conducted with steam as the working fluid. The design may in some or all respects be applied to other working fluids. | 07-17-2014 |
| 091436000 |
Inlet fluid supplemented by controlled fluid pressurized in opposed contracting chamber | 4 |
| 20080245223 | Pressurizing Device - A pressurizing device to carry out checking from outside for malfunctioning of a switching mechanism and fluid leaks from seal parts of a pressure-absorbing mechanism during operation with respect to such failures, and it is possible to avoid size increase of the device and decreasing of movement speed at times of rapid movement. A third through hole extending from a second fluid compartment to outside in the axial direction is formed passing through a fixed part; a rod is slidably supported in the third through hole so as to block the third through hole; a valve member is fixed to one end of the rod and an advancing and retracting mechanism fixed to the output shaft is connected to the other end; and a first connecting hole is opened and closed by the advancing and retracting mechanism operating and advancing and retracting the valve member in the axial direction. | 10-09-2008 |
| 20090007772 | Working Machine, and Quick Load-Dropping Method | 01-08-2009 |
| 20100180761 | HYDRAULIC CONTROL SYSTEM - The invention relates to a hydraulic control arrangement for supplying a pressure medium to at least one consumer. The forward line and/or the return line of the consumer comprises a distributing valve that can be continuously controlled and that has two switch positions, and a lowering brake valve that can be placed in an open position due to the pressure in the supply line. The distributing valve is in an open neutral position and can be displaced, electrically or electrohydraulically, from said neutral position into the direction of the second switch position thereof. | 07-22-2010 |
| 20100224060 | Actuator Controller - Actuator controller comprising a body ( | 09-09-2010 |
| 091420000 |
Contracting chamber exhaust valve controlled by expanding chamber pressure or flow | 4 |
| 20110209608 | TOOL COUPLER ASSEMBLY - A tool coupler assembly for a machine is disclosed. The tool coupler assembly may have a coupler frame, a first latch, a second latch, and a hydraulic actuator connected to move the second latch relative to the first latch and the coupler frame. The hydraulic actuator may have a first chamber, a second chamber, and a pressure valve with a check element movable to allow a flow of fluid into the first chamber based on a pressure of fluid in the first chamber, and a pressure regulating element movable to allow a flow of fluid out of the first chamber based on a pressure of fluid in the second chamber. The tool coupler assembly may additionally have a first pilot passage configured to communicate fluid from the second chamber with the pressure-regulating element, and a second pilot passage configured to communicate fluid from the first chamber with the pressure-regulating element. | 09-01-2011 |
| 20110315005 | Pressure Relief Valve and High Pressure Pump with Such Valve - A valve member of a pressure relief valve has a shaft portion, a pressure receiving portion, and a guide portion, wherein the valve member is axially movable in a fuel return passage. When a forward end of the shaft portion is seated on a valve seta, the fuel return passage is closed, while the shaft portion is separated from the valve seat the fuel return passage is opened. A notched portion is formed at an outer wall of the guide portion to thereby form an outer-surface passage. A fuel inlet port is formed in the valve member for communicating a fuel inlet chamber to the fuel return passage at a downstream side of the valve member. | 12-29-2011 |
| 20140182451 | PRESSURE RELIEF VALVE AND HIGH PRESSURE PUMP WITH SUCH VALVE - A valve member of a pressure relief valve has a shaft portion, a pressure receiving portion, and a guide portion, wherein the valve member is axially movable in a fuel return passage. When a forward end of the shaft portion is seated on a valve seta, the fuel return passage is closed, while the shaft portion is separated from the valve seat the fuel return passage is opened. A notched portion is formed at an outer wall of the guide portion to thereby form an outer-surface passage. A fuel inlet port is formed in the valve member for communicating a fuel inlet chamber to the fuel return passage at a downstream side of the valve member. | 07-03-2014 |
| 20140311335 | LIFTING PLATFORM WITH HYDRAULIC COUPLING OF THE LIFTING RAMS - An apparatus for lifting motor vehicles includes a first lifting device which is movable in a vertical direction and which is suitable for supporting a first region of the motor vehicle to be lifted, and a second lifting device which is arranged at a distance from the first lifting device and which is suitable for supporting a second region of the motor vehicle to be lifted. A first supply line supplies an hydraulic medium to the first lifting device, and with a second supply line supplies an hydraulic medium to the second lifting device. | 10-23-2014 |
| 091422000 |
Valved piston (222) | 4 |
| 20100107864 | ELECTRO-HYDRAULIC DOUBLE-ROD ACTUATING CYLINDER - A double-rod electrohydraulic actuator for the purpose of causing push-pull motion while being part of a structure. Actuator comprises of a piston assembly and an external cylinder. Piston assembly comprises of a piston housing and flanged piston rods on both ends. Piston housing comprises of a cylindrical housing with external sliding seals in sealing contact with the interior surface of the external cylinder. Cylindrical housing contains: pump, motor, relief valves, seals, and porting required for control of fluid flow through the assembly. External cylinder will have sliding seals at both ends in sealing contact with the flanged piston rods of the piston assembly, and hydraulic fluid filling all internal voids. The flanged piston rods will have porting in the flanges for fluid flow and hollow centers for wiring conduit to and through actuator. Relief valves will bypass fluid around the pump section in overload conditions to protect the actuator. | 05-06-2010 |
| 20100300280 | Hydraulic pressure multiplier - A hydraulic pressure multiplier having a housing, a bore in the housing and an outer piston slidably positioned within the bore. The pressure multiplier also includes an inner piston having a bore therethrough, the inner piston being positioned within a bore within the outer piston. An opening is provided through an end wall of the outer piston, and a mechanism is provided to selectively control hydraulic fluid flow into the bore within the outer piston. Hydraulic fluid first flows through the opening in the outer piston and through the bore through the inner piston to actuate a slave cylinder or a hydraulic piston within a brake. After a threshold pressure is reached within the slave cylinder, the valve closes and the outer piston is caused to move axially, thereby providing an increased hydraulic pressure within the slave cylinder. | 12-02-2010 |
| 20120216671 | PISTON PUMP - A piston pump includes a main body having an inlet, an outlet, and a chamber fluidly connected to form at least a portion of a first fluid flow path for receiving a flow of fluid therein. The pump also includes a second fluid flow path to provide fluid communication between the chamber and a point upstream of the inlet of the main body. A piston is disposed in the chamber of the main body and reciprocatingly moves therein to cause the flow of the fluid through at least one of the first fluid flow path and the second fluid flow path. An adjustment element is disposed in the main body and configured to adjust an effective flow of the fluid through the first fluid flow path. | 08-30-2012 |
| 20130061741 | DUAL MODE FLUID POWERED ACTUATOR - A dual-mode fluid powered actuator includes a cylinder housing having a cylinder axis, a first end and a second end spaced axially apart from the first end, and an inner surface extending between the first and second ends. A first fluid port is provided adjacent the first end of the cylinder housing and a second fluid port is provided adjacent the second end of the cylinder housing. A piston assembly is in the cylinder housing, the piston assembly slidable between the first and second ports. The piston assembly includes a first piston member and a second piston member, the first and second piston members translatable relative to each other between an engaged position in which the piston assembly isolates the first fluid port from the second fluid port, and a disengaged position in which the first and second fluid ports are in fluid communication with each other through the piston assembly. | 03-14-2013 |
| 091435000 |
Controlled by rate of movement of working member | 4 |
| 20090241765 | Holding Control Valve - A holding control valve of the present invention is configured such that: a spool is configured to perform strokes by a piston configured to operate by introduction of pilot pressure and have a larger diameter than the spool; the piston is divided into a pilot piston configured to receive the pilot pressure and a relief operation piston disposed adjacent to the spool to receive pressure of relief oil discharged when a relief valve operates; and the relief oil is introduced to between the pilot piston and the relief operation piston. | 10-01-2009 |
| 20120118138 | FLUID DELIVERY SYSTEM COMPRISING A FLUID PUMPING DEVICE AND A DRIVE SYSTEM - A fluid pumping device having a pump housing containing a piston chamber and a reciprocating piston, an inlet port and an outlet port allowing a fluid to enter the piston chamber during an instroke of the piston and be expelled during an outstroke. The device further having a valve switching element movably mounted against a valve base member, with a piston chamber aperture connected to the piston chamber and an inlet aperture and an outlet aperture connected respectively to the inlet and outlet ports of the fluid pumping device. The element has a grooves in the valve base member providing, a first communication between the inlet aperture and the piston chamber aperture so that fluid is sucked, into the piston chamber during part of the piston instroke, and a second communication aperture expelling fluid out of the piston chamber, through the outlet port during part of the piston outstroke. | 05-17-2012 |
| 20120180649 | HIGH PRESSURE PUMP - At least one choked flow passage communicates between one side of the movable member and the other side of the movable member and limits an amount of fuel, which passes from the one side of the movable member to the other side of the movable member, when the movable member is moved by an urging force of a relief spring toward a valve element. A larger amount of fuel, which is larger than the amount of fuel that is passable through the at least one choked flow passage, flows from a first return flow passage to a second return flow passage, when the movable member is moved toward the other side, which is opposite from the valve element, against the urging force of the relief spring. | 07-19-2012 |
| 20150345521 | CYLINDER APPARATUS - A driving chamber ( | 12-03-2015 |
| 091461000 |
Pilot valve (304) | 4 |
| 20080276798 | Asymmetric Volume Booster Arrangement for Valve Actuators - An asymmetric volume booster assembly includes an actuator movable in a first direction and a second direction, a first booster in fluid communication with the actuator, and a second booster in fluid communication with the actuator. The first booster includes a first supply passage and a first exhaust passage, wherein the first supply passage supplies fluid to the actuator and the first exhaust passage exhausts fluid from the actuator. The first exhaust passage is configured to produce a first fluid flow resistance. The second booster includes a second supply passage and a second exhaust passage, wherein the second supply passage supplies fluid to the actuator and the second exhaust passage exhausts fluid from the actuator. The second exhaust passage is configured to produce a second resistance to fluid flow. The first fluid flow resistance is greater than the second fluid flow resistance, such that the actuator moves substantially symmetrically in the first direction and the second direction. | 11-13-2008 |
| 20090078112 | Pilot valve for a hydraulic motor - The invention relates to a pilot valve ( | 03-26-2009 |
| 20090090237 | CONTROL UNIT FOR WORK MACHINE - A control unit for a work machine that allows automatically obtaining optimal operability even when the weight of a work arm in the work machine is changed. In a work machine where at least a part of a work arm to be operated by a fluid pressure actuator is provided so as to be replaceable, a control unit for a work machine includes: a pilot-operated control valve that controls the fluid pressure actuator; a proportional solenoid valve that pilot-controls the pilot-operated control valve by a pilot control pressure according to an electrical signal corresponding to a manual operation amount; a measuring means that measures a weight of at least the part of the work arm; and a controller that converts characteristics between the manual operation amount and the pilot control pressure of the proportional solenoid valve to characteristics according to the weight of the work arm measured by the measuring means. | 04-09-2009 |
| 20100212490 | CONTROL APPARATUS AND CONTROL METHOD FOR A PISTON/CYLINDER ARRANGEMENT - Control apparatus for a piston/cylinder arrangement, wherein the piston/cylinder arrangement has a cylinder and a piston which is accommodated at least partially in the cylinder and divides the cylinder interior along the cylinder axis into two part spaces, having a valve arrangement which is connected to a first part space and assumes a closed position which prevents a fluid which is held in the first part space from flowing out of this part space if the pressure in the fluid is smaller than a pressure control value which is set on the valve arrangement, and which opens into an opening position which makes this outflow possible if the pressure in the fluid is correspondingly greater than the pressure control value which has been set, having a priming device which is coupled to the valve arrangement and the first part space, serves to prepare for the damping of a pressure increase in the fluid which is brought about by a movement of the piston which is caused by a load which acts on the piston in the direction of the first part space, and by means of which a pressure increase can be generated in the fluid to a predefined pressure priming value independently of the load, and a method for controlling a piston/cylinder arrangement of this type and the use of a control apparatus of this type for a piston/cylinder arrangement of a hydraulic press. | 08-26-2010 |
| 091453000 |
Plural actuators for single valve means (367) | 2 |
| 20110226124 | Pneumatic Actuator Structure - An actuator structure includes two half cylinders made respectively from the same mold and the two half cylinders engaged with each other to form an actuator. The actuator has an air reservoir chamber and a vane chamber dividing by a dividing unit, and the vane chamber has a vane inside. An O-shaped ring is formed around the vane and an elastic stopping edge is formed protrudingly from the O-shaped ring and linearly contacted an inner surface of the actuator. The volume ratio of the air reservoir chamber and the vane chamber is about three to one, and a channel groove is formed at an interface of the two half cylinders to connect an air inlet hole and a left side and a right side wall of the actuator. A fail-safe or dual-movement control structure is formed to control the direction of air supply to drive the shaft to rotate toward a predetermined direction, or utilizing the compressed air in the air reservoir chamber to force the vane to restore to its original position. | 09-22-2011 |
| 20120000353 | PILOT-OPERATED DIRECTIONAL CONTROL VALVE, PARTICULARLY FOR CONTROLLING AN ACTUATING CYLINDER OF A TURBO-MACHINE - A directional control valve for controlling working cylinders, servomotors, or an actuating cylinder of a turbo-machine such as gas and steam turbines, the directional control valve includes a force-regulated magnet and a hydraulic unit. The hydraulic unit includes a pilot piston and a control housing in which the pilot piston is situated so it is displaceable in an axial direction of the directional control valve. The control housing has at least three hydraulic connections including a first pressure connection configured for connection to a hydraulic pressure supply, at least one consumer connection configured for connection to the working cylinder or the servomotor, and a tank connection configured for connection to a hydraulic tank. A flow cross-section between the hydraulic connections being variable by displacement of the pilot piston. The valve also having an actuating unit that includes a control piston, an actuating piston, a first elastic element, a second elastic element and a conductor. The control piston is displaceably located in the control housing or in a flange attached on the control housing. The control piston is displaceable using the force-regulated magnet, the control piston being configured to vary the flow cross-section between an actuating unit pressure connection, an actuating piston connection and an actuating tank connection by displacement. The actuating piston is non-positively and/or positively connected on the pilot piston such that the actuating piston is displaceable in the axial direction of the directional control valve. The actuation piston divides a piston room into a first piston room chamber and a second piston room chamber, the chambers being sealed from one another. The first piston room chamber is hydraulically connected to the actuating piston connection. The first elastic element acts against a hydraulic pressure force in the first piston room chamber. The actuating piston being connected by way of the first elastic element to the control piston or being supported thereon. The second elastic element acts against the hydraulic pressure force in the first piston room chamber. The actuating piston being connected by the second elastic element to the control housing or the flange or being supported thereon. The conductor is situated in a magnetic field of the force-regulated magnet. The force-regulated magnet being an electromagnet configured for electrical activation. The conductor is electrically connected to the electromagnet and a control unit for control of the electromagnet such that the magnetic force and the position of the control piston, the actuating piston, and the pilot piston are regulated by way of a Hall voltage generated in the conductor. | 01-05-2012 |
| 091454000 |
Relatively movable inlet and exhaust valves for single working chamber | 2 |
| 20160047243 | EXPANDER FOR A HEAT ENGINE - An expander for a heat engine, the expander being capable of converting a high pressure gaseous working fluid to useful work, the expander including: •high pressure working fluid supply means; •at least one reciprocating piston reciprocating in a cylinder between top-dead-centre (TDC) and bottom-dead-centre (BDC) with a long dwell time at TDC; •a working fluid inlet valve that opens and closes to introduce, while open, high pressure working fluid from the working fluid supply means into an expansion chamber in the cylinder at or near TDC; •power transfer means that transfers work done on a piston by the working fluid to a form of useful work output; and •an exhaust valve to release expanded working fluid from the expansion chamber to a volume of low pressure working fluid; wherein piston travel is small during transition of the inlet valve from open to closed and from closed to open. | 02-18-2016 |
| 20160061226 | PNEUMATIC MACHINING DEVICE - Pneumatic machining device includes a fixing plate, a hollow piston shell, a piston group, a machining tool, a first sealing group, and a second sealing group. The piston shell is fixed to the fixing plate and coupled to a first external pressure source and second external pressure source to feed gas into the piston shell to drive the piston group and the machining tool, respectively. The piston group and the first and second sealing groups are received inside the piston shell. The piston group is driven by the first external pressure source to move away from the fixing plate. The first and second sealing groups divide the piston shell into a number of chambers for controlling a gas pressure. The machining tool is coupled to the piston group and extends out of the piston shell to machine a workpiece as the piston group moves away from the fixing plate. | 03-03-2016 |
| 091426000 |
With fluid pressure holding means for valve | 2 |
| 20160061229 | Energy Efficient Fluid Powered Linear Actuator With Variable Area and Concentric Chambers - Hydraulic actuation systems having concentric chambers, variable displacements and energy recovery capabilities include cylinders with pistons disposed inside of barrels. When operating in energy consuming modes, high speed valves pressurize extension chambers or retraction chambers to provide enough force to meet or counteract an opposite load force. When operating in energy recovery modes, high speed valves return a working fluid from extension chambers or retraction chambers, which are pressurized by a load, to an accumulator for later use. | 03-03-2016 |
| 20160108936 | HYDRAULIC SYSTEM AND METHOD FOR REDUCING BOOM BOUNCE WITH COUNTER-BALANCE PROTECTION - A hydraulic system ( | 04-21-2016 |
| 091437000 |
Independent control of bypass between opposed working chambers | 2 |
| 20100206160 | FLUID CONTROL SYSTEM FOR USE WITH A PATIENT SUPPORT APPARATUS - A fluid control system for use with a patient support apparatus is moveable from a first height to a second height. The system includes a lift arm and a substantially upright cylinder. A first end of the lift arm is pivotably coupled to a base member and a second end of the lift arm is coupled to a chair structure. The cylinder assembly has a base portion and an extendable member configured to contact and support the lift arm. The cylinder assembly includes a bypass valve having a first end in fluid contact with an upper reservoir and a second end in fluid contact with a lower reservoir. | 08-19-2010 |
| 20140290475 | HYDRAULIC ACTUATION UNIT, PARTICULARLY FOR CONTROLLING THE STARTING AND STOPPING OF HYDRAULIC MOTORS - A hydraulic actuation unit for controlling the starting and stopping of hydraulic motors includes a first main circuit and a second main circuit, a first recirculation circuit and a second recirculation circuit, a counterbalancing valve, which includes a shuttle, and a first discharge channel and a second discharge channel. The shuttle includes a first check valve and a second check valve. The first check valve includes at least one first flow control element that can move from an open position to a closure position. The second check valve includes at least one second flow control element that can move from an open position to a closure position. The first and second check valves respectively are provided with first damping means and second damping means in order to slow down the passage movement respectively of the first flow control element and of the second flow control element. | 10-02-2014 |
| 091469000 |
Unitary inlet and exhaust valve for single working chamber | 1 |
| 20130092020 | Fluid Pressure Driven Motor with Pressure Compensation Chamber - A fluid-driven motor has a manifold with an arcuate seal including first and second valve openings and a sealing surface. A cylinder pivotally mounted on the manifold has a facing surface cooperating with the arcuate seal. The arcuate seal and the facing surface define a position-responsive valve configuration such that, when the cylinder assumes a neutral position, an aperture of the facing surface faces the sealing surface, and when the cylinder is angularly displaced in either direction, the aperture overlaps one or other of the valve openings, thereby connecting to the correspond fluid flow channel in the manifold. A pressure compensation volume underlies the sealing surface and receives fluid pressure from the fluid flow channels through valves, or from the internal volume of the cylinder, so that a pressure within the pressure compensation volume approaches a value no less than a current pressure within the internal volume. | 04-18-2013 |
| 091419000 |
Responsive to (1) motive fluid temperature or state, or (2) motor position or orientation | 1 |
| 20130139678 | HYDRAULIC DRIVE SYSTEM FOR HYDRAULIC WORKING MACHINE - A hydraulic drive system designed so that while maintaining intact a structure of a relief valve having a shockless function, the drive unit hydraulic drive system facilitates changing a driving pressure or braking pressure of a hydraulic swing motor and hence, changing a maximum driving torque or braking torque of the hydraulic swing motor. Inside a swing motor unit is arranged a first swinging relief valve provided with a shockless function to limit a driving pressure or braking pressure of the hydraulic swing motor in order to prevent the pressure from exceeding a first setting pressure. Also, a second swinging relief valve is provided for limiting the driving pressure or braking pressure of the hydraulic swing motor in order to prevent the pressure from exceeding a second setting pressure that is lower than the first setting pressure. | 06-06-2013 |
| 091430000 |
Valve parts continuously relatively moved for nonvalving function | 1 |
| 20150075361 | TELESCOPIC ACTUATOR - The invention relates to a telescopic actuator comprising a rod ( | 03-19-2015 |
| 091421000 |
Expanding chamber inlet controlled by contracting chamber pressure or flow | 1 |
| 20130298755 | MOTOR ASSEMBLY FOR PNEUMATIC TOOL - A motor assembly for a pneumatic tool includes: a motor cylinder coaxially secured in a tubular inner housing, which is coaxially secured in a tubular outer housing and has an inlet passage defining a longitudinal axis, including a valve seat, and defining forward and reverse passages that communicate with a motor chamber and extend through the valve seat, and an exhaust port that communicates with the motor chamber, and a throttle passage defined between the inner and outer housings; a motor rotor supported within the motor chamber and rotatable in a forward or reverse direction; and a rotary valve coaxially disposed in the inner housing, supported by the valve seat, and rotatable about the longitudinal axis between forward and reverse positions. | 11-14-2013 |
| 091428000 |
Manual control carried on or operated from load or output element | 1 |
| 20130174723 | NEUTRAL SETTING APPARATUS OF AN ADJUSTABLE HYDRAULIC MACHINE - The invention relates to a neutral setting apparatus for adjustable hydraulic machines, in particular the adjustment of the neutral position of a servo valve. In particular, the invention relates to servo adjustment devices with mechanically adjustable control pistons, wherein the forces necessary for this can be applied mechanically, electro-magnetically, pneumatically or hydraulically. The invention relates to a neutral setting apparatus of an adjustable hydraulic machine, with a housing in which a mounted input shaft is arranged, to one end of which a torque can be applied for rotating the input shaft about an axis. Thus providing a robust and cost-effective setting mechanism for the neutral position of a servo valve. | 07-11-2013 |
| Entries |
| Document | Title | Date |
|---|
| 20080245222 | HYDRAULIC VALVE ARRANGEMENT - The invention concerns a hydraulic valve arrangement ( | 10-09-2008 |
| 20090308242 | PINION VALVE BODY AND PINION VALVE ASSEMBLY FOR VEHICLE EQUIPPED WITH THE SAME - A pinion valve body and a vehicle pinion valve assembly with the valve body are disclosed. The pinion valve body has a lower sleeve integrally formed by a sintering process along with upper splines to block an oil leakage and thus there are no needs any more for the conventional separate lower sleeve as well as the associated machining of sleeve fitting areas on the valve body and the process of press-fitting such sleeve all together, thereby effectively reducing the general manufacturing steps and their cost. | 12-17-2009 |
| 20100236397 | LS CONTROL SYSTEM - An LS control system is disclosed that includes an inlet metering orifice and a pressure compensator, via which the pressure drop across the inlet metering orifice may be held constant. The signalling pressure that acts on the pressure compensator in the opening direction may be varied as a function of the displacement in order to prevent the system from oscillating if a negative load should occur. | 09-23-2010 |
| 20100242718 | METHOD AND SYSTEM FOR CONTROL OF HYDRAULIC SYSTEMS - A hydraulic actuation system includes a metering valve; and a piston arrangement hydraulically in parallel with the metering valve, the system configured to preferentially move the piston to precharge an end device with hydraulic fluid prior to supplying an actuation fluid volume to the end device and method for actuating a hydraulic end device. | 09-30-2010 |
| 20110048223 | CONTROL DEVICE FOR A HYDRAULIC MOTOR - A control device for controlling a speed of a hydraulic motor includes a housing defining a first void. A speed valve is disposed within the first void and is moveable between a first speed valve position and a second speed valve position. The first void includes a speed valve pressure chamber disposed at one end of the speed valve. A speed valve spring is disposed at another end of the speed valve. The housing further defines a speed change port and a speed change passage interconnecting the speed change port and the speed change pressure chamber for directing a pressurized fluid directly into the speed valve pressure chamber to exert a pressure force on the speed valve and bias against the speed valve spring to move the speed valve between the first speed valve position and the second speed valve position. | 03-03-2011 |
| 20110132185 | Variable Output Hydraulic Actuator System - Methods and apparatuses of generating a dynamic variable average flow applied by a hydraulic system of a vehicle. | 06-09-2011 |
| 20110174152 | VALVE-CONTROLLED POSITIVE DISPLACEMENT MACHINE - A valve-controlled hydrostatic positive displacement machine (DDU) is proposed, with a plurality of cylinder-piston units which are each activatable or deactivatable, via at least one low-pressure valve and via one high-pressure valve, for adjusting a volume flow of the positive displacement machine. According to the invention a valve body of the high-pressure valve is embodied as a valve slide, and operative faces acted upon in or counter to a displacement direction are essentially pressure-balanced. | 07-21-2011 |
| 20110247485 | Pressure Booster and Diecasting Arrangement - A pressure booster ( | 10-13-2011 |
| 20110315003 | VALVE ASSEMBLY - A valve assembly for regulating the flow of fluid between a working chamber of a fluid-working machine and a fluid manifold. The valve assembly comprising a valve body comprising a valve seat, a fluid passage extending through the valve body, and a travelling member comprising a valve member and operable between an open position in which the valve member is spaced apart from the valve seat and fluid can flow through the fluid passage and a closed position in which the valve member is in sealing contact with the valve seat preventing fluid from flowing through the fluid passage. The valve assembly further defines a fluid flow path passing in a first fluid flow mode, between the valve member and the valve seat, and into the fluid passage. The valve assembly is characterised by a barrier upstream of the valve member, to the barrier reduces one or more forces which would otherwise act on the valve member as a result of the flow of fluid to urge the valve member towards the valve seat. Thus, one or more forces which would otherwise act on the valve member to urge the valve member to the closed position due to the flow of fluid past the valve member in the first fluid flow mode are reduced or removed. There is also disclosed a valve assembly in which fluid flowing along the said fluid flow path is incident on the downstream surface of the valve member at an angle of at least 80° to the direction in which the valve member is operable to travel between the open position and the closed position. | 12-29-2011 |
| 20110315004 | VALVE ASSEMBLY - A valve assembly suitable for regulating the flow of fluid between a working chamber of a fluid-working machine and a fluid manifold. The valve assembly comprises a valve body comprising a valve seat, a fluid passage extending through the valve body, and a travelling member comprising a valve member, which valve member is operable between an open position in which the valve member is spaced apart from the valve seat and fluid can flow through the fluid passage and a closed position in which the valve member is in sealing contact with the valve seat preventing fluid from flowing through the fluid passage. The valve assembly defining a fluid flow path passing, in a first fluid flow mode, between the valve member and the valve seat, and into the fluid passage. The valve assembly is characterised by defining a fluid flow path including a constricted flow region and further comprising a reduced pressure chamber in communication with both a first surface of the travelling member and the constricted flow region, arranged to exert a force on the travelling member by way of a pressure reduction in the reduced pressure chamber when fluid is flowing along the fluid flow path, through the constricted flow region, which force acts to resist closure of the valve. Thus, a force is generated which opposes forces acting on the valve member due to the flow of fluid past the valve member. | 12-29-2011 |
| 20120006191 | AIR OR GAS COMPRESSION SYSTEM - A gas compression system is disclosed that includes a hollow cylinder having a cylinder wall, a reciprocal piston carried within the cylinder, and a piston rod connected to the piston. Gas compression control within the cylinder is determined by providing at least two closable openings through the cylinder wall that become closed as the reciprocal piston approaches top dead center within the cylinder. The spacing of the openings is preferably diametrically opposite one another. | 01-12-2012 |
| 20120036992 | PISTON MACHINE, ESPECIALLY FLUID PISTON MACHINE - A piston machine, in particular a fluid piston machine, is described as having a plurality of piston units, which have differently sized output volumes for reasons of geometry, and are able to be deactivated individually for the discrete adjustment of a total output volume of the piston machine. In this context, the larger output volume of one of the piston units is twice as high as the next smaller output volume of one of the other piston units. | 02-16-2012 |
| 20120042771 | ELECTRONICALLY CONTROLLED VALVE - An electronically controlled valve includes a valve member moveable between a first position and a second position. A valve member moving mechanism is operable to receive energy from a fluid-working machine crankshaft, or other rotating shaft, and to provide a valve member moving force to urge the valve member from the first position to the second position using the received energy. Thus, the energy used for movement of the valve against a pressure gradient is derived from the crankshaft. Energy received from the crankshaft can be stored and used subsequently to urge the valve member from the first position, allowing the valve to function despite timing differences between the availability of energy from the crankshaft and the requirement for energy to move the valve member. | 02-23-2012 |
| 20120103179 | PUMP UNIT - A pump unit has an inlet valve, an outlet valve, a supply line for supplying fuel, a pumping chamber, and a plunger for pressurising fuel in the pumping chamber. The inlet valve includes an inlet valve member movable between a first position and a second position. The inlet valve member has an aperture formed therein. The aperture provides a first fluid pathway between the pumping chamber and the supply line when the inlet valve member is in its first position, and the aperture provides a second fluid pathway between the pumping chamber and the outlet valve when the inlet valve member is in its second position. | 05-03-2012 |
| 20120198991 | FLUID OPERATED ACTUATOR - A fluid operated actuator ( | 08-09-2012 |
| 20120227579 | Vacuum Brake Servo for a Motor Vehicle Braking System - The invention relates to a vacuum brake servo for a motor vehicle braking system, comprising a rod-like force input element which is coupled or can be coupled to a brake pedal, a control valve which is actuated by means of the force input element, a chamber arrangement having a vacuum chamber which can be connected to a vacuum source, and also having an operating chamber which, depending on the actuation of the force input element, can optionally be connected to the vacuum chamber and to the surrounding atmosphere. The control valve has a control piston that can be actuated by means of the force input element and, together with a valve element, forms a seal seat having a seal seat diameter between the operating chamber and the surrounding atmosphere. In the area close to the seal seat, a guide channel is provided, through which, when the seal seat is opened, air from the surrounding atmosphere flows into the operating chamber as a result of a pressure difference. In order to reduce the intake noise, provision is made in the guide channel for the latter to extend in the axial direction with a constant flow diameter over a predetermined length, wherein the flow diameter is less than or equal to the seal seat diameter. | 09-13-2012 |
| 20120255433 | PUMP ASSEMBLY - A pump assembly includes a pump housing provided with a bore within which a pumping plunger is reciprocal along a plunger axis; a pump chamber defined at one end of the bore within which fuel is pressurised to a relatively high level; and an inlet valve housed within the pump housing and in communication with the pump chamber to control the flow of fuel into the pump chamber. A clamp member applies a clamping load to the pump housing, which has at least a component that is aligned with the plunger axis, through a surface of the pump housing located approximately axially above the bore. The clamp member may be secured to the pump housing by a securing member, which may be positioned radially outwards from the bore and extend through or below a plane through the pump chamber and perpendicular to the plunger axis through the pump chamber. | 10-11-2012 |
| 20120291624 | WORKING DEVICE - The present invention relates to a working device having an element movable via at least one working cylinder, with at least one energy recovery cylinder being provided for recovering energy from the movement of the movable element and having a chamber filled with gas. In this respect, the chamber filled with gas is in operative communication with a pressure store which counters a pressure increase in the chamber filled with gas at least from a maximum pressure onward. | 11-22-2012 |
| 20120312155 | PISTON ROD AND CYLINDER SEAL DEVICE FOR ALUMINUM BATH CRUST BREAKER - A piston rod and cylinder seal device includes a cylinder defining a piston chamber extending between first and second cylinder heads. The second cylinder head has a spud receiving bore, a pressure passage communicating with the spud receiving bore, and a bore supply/vent passage. A first piston is disposed in the piston chamber. A piston rod is connected to the piston, the piston rod having a piston rod spud extending beyond the first piston and including a blind shaft receiving bore. A second piston slidably disposed in the blind shaft receiving bore has a seal member connected thereto. A contact member connected to the second cylinder head in the spud receiving bore has a central passage extending therethrough in communication with the bore supply/vent passage. The seal member when contacting the contact member acts to seal the central passage. | 12-13-2012 |
| 20120312156 | Fluidic Impulse Generator - A device for vibrating tubing as it is inserted into a wellbore is disclosed. The device has a fluidic switch that has no moving parts. The fluidic switch is connected to a piston that oscillates back and forth in a cylinder. The piston is the only moving part. As the piston oscillates, it blocks and unblocks openings in the cylinder or other components. The movement of the piston controls the timing of the oscillation, and also generates an impulse or vibration. The vibration may reduce the friction between the tubing and the wellbore. | 12-13-2012 |
| 20130008303 | AIR MOTOR - An air motor ( | 01-10-2013 |
| 20130019745 | POPPET VALVE WITH AN IMPACT DAMPER AND METHOD FOR REDUCING IMPACT WEAR IN HYPER COMPRESSORS - Disclosed herein is a differential pressure poppet valve comprising: a valve body, the valve body having at least one flow inlet and at least one flow outlet; at least one shutter guide disposed inside the valve body; at least one poppet shutter guided by the shutter guide; at least one flow passage from the flow inlet to the flow outlet, the flow passage being formed between an inside surface of the valve body and an outside surface of the shutter guide and of the poppet shutter. The valve further comprises at least one biasing member configured to bias the poppet shutter towards a closed position so as to block the flow passage through the flow inlet. To reduce impact wear at least a first damper is provided, configured and arranged to at least partly absorb impact energy of the poppet shutter when the poppet shutter opens or closes the flow inlet. | 01-24-2013 |
| 20130025446 | CYLINDER APPARATUS - A cylinder apparatus includes a flow path which is provided in a valve member and through which a fluid circulates when a rod is moved; a disk valve which opens and closes the flow path; and a spring member which presses the disk valve in an axial direction. The spring member includes a first spring which comes into contact with the disk valve in a state in which the disk valve closes the flow path, and a second spring which comes into contact with the disk valve in a state in which the disk valve opens the flow path. | 01-31-2013 |
| 20130032027 | FLUID PRESSURE CYLINDER - In a fluid pressure cylinder, a piston is displaced in an axial direction under the action of a pressure fluid. A circular protrusion, which projects toward the piston along an axial direction of the cylinder tube, is formed on an inner end surface of a collar member constituting part of the fluid pressure cylinder, a concavity, which can be fitted externally over the circular protrusion, is formed on the piston, and an annular groove is formed on an inner circumferential edge of an end plate. By the piston coming into contact with the end plate, a pressure receiving chamber is formed between the piston and the annular groove, together with an opening of a second port on an inner side of the cylinder tube being closed to a maximum of 90%. | 02-07-2013 |
| 20130081535 | PISTON-CHAMBER HYDRO-GRAVITY ENGINE - A piston-chamber hydro-gravity engine capable of converting the stagnant volume of the liquid matter of sea, lake, pond or artificially made hydro container, to a moving volume of liquid matter that flows back upon itself and in meanwhile exploits this motion as a working agent to produce mechanical kinetic power, capable of being used for mechanical production of kinetic work for hydro-electricity generation, or to be used multi-purposely for other energy needs that demand mechanical kinetic force sufficient to solve energy production problems worldwide forever beneficial to the economy and, friendly to the environment, consisting of particular accessories of mechanisms embodied in a single system of mutual successive co-operation by exploiting gravity, that is the hydro-container ( | 04-04-2013 |
| 20130160641 | VALVES WITH VALVE CLOSING MEMBER ATTACHED TO THE ACTUATED COUNTER-SEAT AND RELATED METHODS - A valve assembly in a reciprocating compressor used in oil and gas industry is provided. The valve assembly comprises an actuator configured to a valve actuating motion and a valve. The valve has a valve seat comprises an inlet port configured to allow a fluid to flow through the valve seat, a counter-seat comprising an outlet port configured to allow the fluid to flow through the counter-seat, and a valve closing member attached to the counter-seat and configured to cover the inlet port when the counter-seat is in a closed position. The counter-seat is configured to receive the valve actuating motion and to move between the closed position and an open position in which the valve closing member does not cover the inlet port thereby selectively allowing the fluid to flow on a flow path which comprises the inlet port and the outlet port. | 06-27-2013 |
| 20130205986 | ANNULAR VALVE - An annular valve ( | 08-15-2013 |
| 20130255480 | Variable valve actuator - The present invention discloses an actuator, which is a combination of a hydraulic control unit and a spring-mass mechanical unit, comprising: a housing, with upper and lower ports; an actuation cylinder in the housing; an actuation piston in the actuation cylinder moveable along the longitudinal axis; a first fluid space; a second fluid space; a first piston rod connected to a first surface of the actuation piston; the second piston rod connected to a second surface of the actuation piston; a fluid bypass; a first spring system connected to the first piston rod, biasing the actuation piston in the second direction; a second spring system biasing the actuation piston in the first direction; a first flow mechanism; a second flow mechanism. The present invention also discloses two other preferred embodiments. The actuator features variable valve lift, low energy consumption, fast dynamic response, soft seating and easy controllability. | 10-03-2013 |
| 20130284013 | AXIAL PISTON MOTOR AND METHOD FOR OPERATING AN AXIAL PISTON MOTOR - To provide an axial piston motor ( | 10-31-2013 |
| 20130298754 | AXIAL PISTON MACHINE - An axial piston machine includes a housing part, a drive shaft, which is mounted in the housing part, and a cylinder drum, which is connected to the drive shaft in a rotationally fixed manner and which accommodates a plurality of pistons. Each of the pistons bound a working chamber and are supported on a swashplate. The working chambers can be connected in alternation to a high-pressure channel and to a low-pressure channel, which extend in the housing part. An insert part is rigidly inserted into the housing part. A control surface of the insert part is directly opposite the cylinder drum. The insert part has a high-pressure channel section and a low-pressure channel section, which have approximately kidney-shaped opening areas in the control surface. The other openings of the high-pressure and low-pressure channel sections opposite the opening area in the control surface are formed radially on the insert part. | 11-14-2013 |
| 20130312597 | HYDRAULIC SERVO-CONTROL OF A SERVO-CONTROLLED GEARBOX - A hydraulic servo-control of a servo-controlled gearbox provided with a hydraulic accumulator, having an outer housing and a piston that is slidable axially inside the outer housing and adapted to define a first variable-volume chamber for a gaseous material and a second variable-volume chamber for a control fluid under pressure; and at least one limit stop arranged at an open end of the outer housing which serve as a lower limit stop element; wherein the outer housing is provided with an upper limit stop element, which acts to limit the pressure value inside the first variable-volume chamber within a predetermined safety range. | 11-28-2013 |
| 20130327207 | ELECTROMECHANICAL ACTUATOR DAMPING ARRANGEMENT FOR RAM AIR TURBINE - A ram air turbine actuator includes a piston rod arranged in a cylinder. The cylinder and piston rod are configured to move longitudinally relative to one another between retracted and deployed positions. An annular space provided between the cylinder and piston rod, and a fluid flow regulating feature is provided in the piston rod. The fluid flow regulating feature is progressively blocked from the retracted position to the deployed position. The RAT actuator is deployed by initiating a deploy sequence and reducing a volume of an annular space. Fluid flow is forced from the annular space through a flow regulating feature to a cavity. The size of the flow regulating feature reduces to damp the actuator during the deploy sequence. | 12-12-2013 |
| 20140013937 | RECIPROCATING SERVO CONTROL DEVICE FOR MAINSHAFT OF HONING MACHINE - A reciprocating servo control device for a mainshaft of a honing machine includes a bed body, a mainshaft mechanism, a driving system for hydraulic reversing and a control system, the driving system includes a mainshaft hydraulic cylinder and a mechanical-hydraulic servo valve, a valve body of the mechanical-hydraulic servo valve is connected to a piston rod of the mainshaft hydraulic cylinder via a connecting mechanism, a spool of the mechanical-hydraulic servo valve is connected to one end of a first connecting member, and the other end of the first connecting member is connected to a pilot displacement mechanism controlled by a servo driving and control system. The reciprocating servo control device adopts a mechanical position closed-loop and a hydraulic position closed-loop, to achieve numerical control of speed, position and reversing of the mainshaft hydraulic cylinder, thus a simple structure, reliable control, low price and easy adjustment can be realized. | 01-16-2014 |
| 20140020552 | PNEUMATIC SHIFTING FORCE SUPPORTING DEVICE - A pneumatic shifting force supporting device for a gearbox comprises a housing structure having a compressed air inlet and an air vent, and a control rod and an output unit comprising a working piston defining two pneumatic working chambers. A valve arrangement is functionally provided between control rod and output unit. By acting on the two pneumatic working chambers, the valve arrangement causes a pneumatic follow-up control from the output unit to the control rod comprising two valve pistons, annular sealing edges, valve spools and valve seats. A throttle slide is associated with at least one of the valve pistons and is slidable relative thereto. The throttle slide has a closing edge co-operating with the respective associated valve seat and delimiting at least one throttle passage, the cross-sectional area of which depends on the relative position of the throttle slide with respect to the associated valve piston. | 01-23-2014 |
| 20140026748 | INTEGRATED IMPLEMENT DOWNFORCE CONTROL SYSTEMS, METHODS, AND APPARATUS - A downforce controller for an agricultural implement having a double-acting hydraulic cylinder. The cylinder is configured to be coupled to an agricultural row unit and an agricultural toolbar for transmitting a net downforce between the agricultural toolbar and the agricultural row unit. A first pressure in a first chamber of the cylinder and a second pressure in a second chamber of the cylinder have counteracting effects on the net downforce. A manifold coupled to the cylinder is in fluid communication with the first chamber. A pressure control valve coupled to the manifold is in fluid communication with the manifold and the first chamber. | 01-30-2014 |
| 20140033910 | METHOD TO PREVENT DEBRIS BUILD-UP ON RECIPROCATING AIR MOTOR PILOT VALVES - An end cap assembly for a reciprocating air motor comprises a pilot valve and an end cap body. The pilot has a valve stem. The end cap body comprises a central bore for receiving an air motor rod, a valve bore in which the pilot valve is disposed such that the valve stem extends through the end cap body, and an air port extending through the end cap body. The air port has a contour to direct air toward the valve stem. | 02-06-2014 |
| 20140053719 | DUAL STAGE PILOTED FORCE REDUCTION VALVE - A pressurized fluid subassembly comprising: (a) a fluid driven actuator configured to utilize fluid at a high pressure to change an overall length of the fluid driven actuator; and, (b) a sequence valve interposing a low pressure line and a supply line conveying the fluid to the fluid driven actuator, the sequence valve including a first sequence configured to inhibit fluid communication between the supply line and the low pressure line when the fluid at the high pressure is actively supplied to the fluid driven actuator, the sequence valve including a second sequence configured to establish fluid communication between the supply line and the low pressure line when the fluid at the high pressure is not actively supplied to the fluid driven actuator, wherein the sequence valve includes a variable bias that changes depending upon whether the fluid at the high pressure is actively supplied to the fluid driven actuator. | 02-27-2014 |
| 20140053720 | RECIPROCATING COMPRESSOR - A reciprocating compressor is provided. Bearing holes of a fluid bearing of the compressor may be positioned correspond to a full reciprocating region of a piston, to reduce/eliminate frictional loss and/or abrasion between a cylinder and the piston. The bearing holes may be concentrated at certain regions of the cylinder to stably support the piston through a full reciprocating range. Compression coil springs may maintain concentric alignment of the cylinder and the piston. Gas through holes may be radially formed at the piston to lower a pressure of a bearing space and allow refrigerant to be smoothly introduced into the bearing space through a gas pocket. A casing of the compressor may include an outer shell and an inner shell to attenuate vibration generated due to friction generated by operation of the reciprocating compressor. | 02-27-2014 |
| 20140060315 | SHOCK ABSORBER AND VALVE MEMBER - An object of the present invention is to facilitate discharge of foreign matter present around a valve member, while inhibiting degradation of seal performance of the valve member. A shock absorber includes a cylinder portion containing a liquid, a piston valve partitioning a space in the cylinder portion into a first oil chamber and a second oil chamber which contain oil, a piston rod connected to the piston valve and moving in an axial direction of the cylinder portion, a piston nut | 03-06-2014 |
| 20140090552 | COMPACT LINEAR ACTUATOR - A fluid-driven linear actuator comprises a piston configured for reciprocating motion in a piston chamber and a spool valve in a valve chamber. The valve chamber is fluidly connected to a fluid input and to a fluid output. The spool valve is configured to be hydraulically moved within the valve chamber between a plurality of spool valve configurations, comprising a first spool valve configuration wherein the valve chamber is fluidly connected to the piston chamber to thereby create a first fluid pressure differential which tends to force the piston in a first axial direction and a second spool valve configuration wherein the valve chamber is fluidly connected to the piston chamber to thereby create a second fluid pressure differential which tends to force the piston in a second axial direction. The actuator also comprises at least one switch valve configured to be switched between a plurality of switch valve configurations and to thereby create one or more differential pressure configurations which hydraulically move the spool valve. | 04-03-2014 |
| 20140096676 | CYLINDRICAL LINER FOR PISTON ACTUATOR - Disclosed herein are new types of hydraulic piston valve actuators wherein the piston is replaceable with different sized pistons. Further disclosed are parts of the piston interchange system resulting in the fewest number of parts changed between one piston diameter and another piston diameter. Methods of changing from one piston diameter to another piston diameter are also disclosed. | 04-10-2014 |
| 20140109762 | Control Actuator - The control actuator in accordance with the invention comprises a first part with a first wall arrangement and a bottom that circumscribe an inflow volume. The first wall arrangement comprises at least one flow opening through which fluid from the inflow volume can flow. Furthermore, the control actuator comprises a second part with a second wall arrangement that is arranged so as to be adjustable along the first wall arrangement. As a result of this, the fluid flow through a flow opening can be gradually cleared or limited. Preferably, the bottom is arranged in such a manner that the bottom breaks a basic inflow direction S | 04-24-2014 |
| 20140116243 | RECUPERATING PASSIVE AND ACTIVE SUSPENSION - A hydraulic actuator assembly includes an actuator, a first sink subsystem in fluid communication with an upper working chamber of the actuator, a second sink subsystem in fluid communication with a lower working chamber of the actuator and a source subsystem in fluid communication with both the upper and lower working chambers of the actuator. A low pressure accumulator is in fluid communication with the upper and lower working chambers, the first and second sink subsystems and source subsystem. A high pressure accumulator is in fluid communication with the first and second sink subsystems and the source subsystem. The hydraulic actuator assembly can generate passive or active forces with or without energy recuperation. | 05-01-2014 |
| 20140116244 | PRESSURE CONTROL RESERVOIR WITH CHECK VALVE - A pressure control reservoir for a vehicle brake system is disposed in a hydraulic line extending from a master cylinder to a wheel cylinder through a pump. The pressure control reservoir includes a check valve which consists of a valve seat and a valve. The check valve is closed when an excessive pressure of brake fluid produced by the master cylinder. The valve is stationary. The valve seat is moved in response to an elevated level of the pressure of brake fluid into engagement with the valve, so that the check valve is closed. With these arrangements, the check valve is closed before a piston starts to move to change the volume of a reservoir chamber, thus permitting the volume of the brake fluid required to close the check valve to be decreased, which minimizes the uncomfortable feeling given to a driver of the vehicle when actuating the brakes. | 05-01-2014 |
| 20140190346 | Economizer Device For Linear Pneumatic Actuator - An economizer device associable with a linear pneumatic actuator includes a body having openings and a Venturi vacuum generator slidably housed in a first conduit. The device operates between a first operating configuration, where a first opening is supplied with air at an operating pressure and the vacuum generator moves in the first conduit to permit primary flow of air and to reduce outlet pressure thereof from a second opening so as to supply the chamber of the actuator with air at a reduced pressure lower than the operating pressure, and a second operating configuration, where the first opening is connected to the environment at atmospheric pressure and a third opening is supplied with pressurized air with which it supplies the vacuum generator, which creates a vacuum in the second opening in such a manner as to suck air from and create a vacuum in the chamber. | 07-10-2014 |
| 20140196600 | AIR ENGINE WITH ROTATABLE INTAKE-EXHAUST MECHANISM - An air engine includes a cylinder, a piston, a gas supply and an intake-exhaust mechanism. The gas supply supplies a compressed gas to move the piston reciprocating in the cylinder. The intake-exhaust mechanism connected to the cylinder and the gas supply includes a body and an intake-exhaust assembly. The body has a chamber, and an intake channel, an exhaust channel, an inlet port and an outlet port, which communicate with the chamber. The intake-exhaust assembly, rotatable within the chamber, controls the inlet port to be connected to the intake channel, and further controls the outlet port to be connected to the exhaust channel, so that the compressed gas enters the cylinder via the inlet port and the intake channel to drive the piston. After driving the piston, the compressed gas becomes an exhaust gas, which is exhausted from the cylinder via the exhaust channel and the outlet port. | 07-17-2014 |
| 20140260950 | ACTUATION SYSTEM FOR A JOINT - An actuation system for a joint includes an actuator having a piston, an articulating element coupled to the actuator that is driven by the piston to match a gait cycle of an appendage, an energy source engaged with the piston that energizes working fluid within the actuator to drive the piston and generate exhaust gas, a plurality of valves coupled to the actuator, and an exhaust gas holding element coupled to the actuator that is sized to hold a volume of the exhaust gas contained within the actuator. | 09-18-2014 |
| 20140283676 | Fluid Regeneration in a Hydraulic System - A hydraulic system for a work machine may include a first hydraulic cylinder, a second hydraulic cylinder and a monospool assembly in fluid communication with the first hydraulic cylinder and the second hydraulic cylinder. The monospool assembly may facilitate at least one of a cylinder-to-cylinder regeneration flow, makeup flow and supplemental flow to at least one of the first hydraulic cylinder and the second hydraulic cylinder. | 09-25-2014 |
| 20140311333 | CENTRAL VALVE FOR PIVOT MOTOR ACTUATOR - A central valve for a pivot motor actuator, the central valve including a housing tube including a first operating connection, a supply connection, a second operating connection and a tank drain connection; a piston enveloped by the housing tube and moveable relative to the housing tube, wherein the first operating connection is connected with the supply connection and the second operating connection is connected with the tank drain connection in a first position of the piston, wherein the piston is positioned in a center position in a second position, and wherein the second operating connection is connected with the supply connection and the first operating connection is connected with the tank drain connection in a third position of the piston, wherein the piston includes at least one first check valve on its outside. | 10-23-2014 |
| 20140311334 | PISTON PUMP AND MOTOR - A plunger pump or plunger motor includes a block accommodating a first cylindrical chamber and a plunger movable in this chamber and a drive shaft connected to this plunger, as well as a second cylindrical chamber and a control valve movable in this second cylindrical chamber. Holes O | 10-23-2014 |
| 20140338524 | NON-COMBUSTION PNEUMATIC-VACUUM ENGINE - An engine includes cylinders using pressure differences to motivate the pistons. Each cylinder has a first outlet in its' first end, the first outlet being coupled to a vacuum chamber via a first valve and a first conduit, a second outlet in the cylinder's first end, the second outlet being coupled to an air pressure chamber via a second valve and a second conduit, a third outlet in the cylinder's second end, the third outlet being coupled to the vacuum chamber via a third valve and a third conduit, and a fourth outlet in the cylinder's second end, the fourth outlet being coupled to the air pressure chamber via a fourth valve and a fourth conduit. The valves are electrically controlled by a processor. When the first and fourth valves are turned on, the piston is pulled forward by a pressure difference created by the vacuum chamber and is at the same time pushed forward by a pressure difference created by the air pressure chamber. When the piston reaches its maximum length, the first and fourth valves are turned off, and the second and third valves are turned on, and the piston is pulled backward by a pressure difference created by the vacuum chamber and is at the same time pushed backward by a pressure difference created by the air pressure chamber. When the piston reaches its minimum length, the second and third valves are turned off, and the first and fourth valves are turned on. | 11-20-2014 |
| 20150013534 | ACTUATION SYSTEM - A device includes an actuation system with a dose chamber including an inlet for high pressure fluid. A working chamber extends away from the dose chamber. An annular wall separates a portion of the working chamber from the dose chamber such that the dose chamber encompasses the portion of the working chamber. In use an item to be driven along the working chamber is at least partially within the surrounded portion of the working chamber with the item at one end of its travel in the working chamber. A valve mechanism selectively allows high pressure fluid from the dose chamber to flow into the piston chamber. | 01-15-2015 |
| 20150114213 | PNEUMATIC MOTOR AND PNEUMATIC VALVE FOR THE SAME - A pneumatic motor includes a housing, a rotor, an air flowing unit and an air-supply unit. The housing has an inside space formed along an axis and divided sequentially into a rotor chamber, a valve chamber and an inlet chamber. The rotor is rotatably mounted in the rotor chamber. The pneumatic valve is mounted in the rotor chamber and the valve chamber and includes an air flowing unit and an adjusting gate. The air-supply unit is mounted in the inlet chamber and is connected to a source of compressed air, so the compressed air can flow from the inlet chamber into the valve chamber and then flow through the pneumatic valve to drive the rotor. | 04-30-2015 |
| 20150114214 | VACUUM BRAKE BOOSTER - A vacuum brake booster includes a housing in which a piston is accommodated, the piston being supported by a cylindrical body sealingly passing through an opening in the bottom and having a key that engages with the return element of the cylindrical recess. A damping element separates the front of the key from the rear of the base supporting the piston and the bead of the membrane. | 04-30-2015 |
| 20160097406 | HYDRAULIC DAMPER, HYDRAULIC BUMP-STOP AND DIVERTER VALVE - Hydraulic bump stops and bi-directional diverter valves may be used to protect hydraulic systems, including, for example in one embodiment, the hydraulic actuators of an active suspension system, from damage due to operation outside the normal operating range of the system. In some embodiments, a hydraulic bump stop may be used to slow down the motion of a piston at the extremes of the compression and/or extension strokes of an actuator. In another embodiment, a diverter valve may be used to protect a hydraulic motor/pump in a hydraulic system from an over-speed condition. When the piston in an active suspension system actuator moves at a speed in excess of a threshold value, one or more diverter valves may be used to divert flow away from the hydraulic motor/pump. In some embodiments, a diverter valve may be a dual or single spool bi-directional diverter valve. | 04-07-2016 |
| 20160123311 | FLUID WORKING MACHINE - The invention provides a fluid working machine comprising: a cylinder block ( | 05-05-2016 |
| 20160186479 | DEVICE FOR EMERGENCY ACTUATION ESPECIALLY INTENDED FOR AN AIRCRAFT OPENING - This device comprises:
| 06-30-2016 |
| 20170234337 | AMPLIFYING THE RESPONSE OF SOFT FLUIDIC ACTUATORS BY HARNESSING SNAP-THROUGH INSTABILITIES | 08-17-2017 |
