| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 091508000 | PLURAL RELATIVELY MOVABLE OR RIGIDLY INTERCONNECTED WORKING MEMBERS | 24 |
| 20090090238 | Torque Motor - The present invention relates to a rotary motor, preferably a pivot drive for construction machinery, hoisting gear, trucks and the like, comprising an elongate, approximately tubular housing, at least one piston which is axially displaceably received in the housing and which can be axially driven by the charging of a pressure medium in a pressure chamber as well as at least one shaft which is received axially fixedly in the housing and rotatably around an axis of rotation, with the piston having a shaft passage cut-out by which the piston is axially displaceably seated on the shaft. In accordance with the invention, the shaft forms a crankshaft whose axis of rotation is offset with respect to the shaft passage cut-out. The shaft piece respectively passing through the shaft passage cut-out has a lever arm which is opposite the axis of rotation of the shaft and which translates the radial force at the engagement between the shaft and the piston which arises due to the axial displacement of the piston and the pitch of the spiral engagement track between the shaft and piston and/or between the piston and the housing into a rotary movement of the shaft with respect to the housing or vice versa. To achieve favorable force output conditions, provision is in particular made in this respect for the shaft passage cut-out to be arranged approximately centrally in the piston with respect to the cross-sectional surface of the piston, with a security against rotation of the piston being omitted so that a rotatability of the piston with respect to the housing is given. | 04-09-2009 |
| 20110162519 | LINEAR ACTUATOR - A linear actuator includes a guide block constituting a guide mechanism. In the guide block, a pair of installation grooves are formed in a lower surface facing toward a cylinder main body. Ball circulation members having therein ball circulation holes are installed respectively in the installation grooves. Additionally, ball circulation passages through which balls circulate are provided. The ball circulation passages are made up from roll-reversing sections disposed on opposite ends of the ball circulation members, the ball circulation holes, second ball guide grooves formed in both side surfaces of the guide block, and first ball guide grooves of the slide table. | 07-07-2011 |
| 20110162520 | LINEAR ACTUATOR - A linear actuator includes a cylinder main body. With respect to the cylinder main body, a slide table is disposed for reciprocal displacement through a guide mechanism, which is disposed on the cylinder main body. A stopper mechanism having a stopper bolt is disposed on one end of the slide table centrally in a widthwise direction perpendicular to the longitudinal direction of the slide table. In addition, when the slide table is displaced along the cylinder main body, an end of the stopper bolt comes into abutment with an end of a cover of the guide mechanism, whereupon the slide table becomes engaged therewith and movement of the slide table is stopped. | 07-07-2011 |
| 20120090459 | FLOATING PISTON ACTUATOR FOR OPERATION WITH MULTIPLE HYDRAULIC SYSTEMS - A floating piston actuator for use with multiple hydraulic systems includes a housing and a piston assembly. The piston assembly includes an elongate shaft or ram, at least one secured piston coupled to the ram, and a set of moveable pistons moveably disposed within the housing chamber on the ram such that the set of moveable pistons are translatable relative to a longitudinal axis of the ram. The set of moveable pistons form at least three hydraulically separate actuator cylinders where each of the three hydraulically separate actuator cylinders are disposed in fluid communication with a corresponding pressurized fluid source. The floating piston actuator allows hydraulic redundancy while maintaining a similar length compared to existing multi-system actuators. The floating pistons can be arranged in multiple configurations to allow operation with a hydraulic system failure without force fight or binding and with a higher output force than conventional multi-system actuators. | 04-19-2012 |
| 20120103180 | MIXED GAS ENGINE - The mixed gas engine in accordance with the invention is used to obtain a power that is transmitted to a shaft to turn it, and it is made up of an oilbath body subassembly A containing a crankshaft-connecting rods-piston subassembly B, and over which is a cylinder unit subassembly C, a recuperator distributor body subassembly D containing a rocker shaft subassembly E, a camshaft subassembly F | 05-03-2012 |
| 20120144997 | CYLINDER PRESSURE ADJUSTER OF A MOTOR - A crank device and an adjusting device of a combustion engine. The system adjusts the cylinder pressure of the motor in accordance with the required power. Adjustment of the cylinder pressure takes place by changing the compression ration by means of the adjusting device ( | 06-14-2012 |
| 20130098237 | DEVICE FOR CONTROLLING THE MOVEMENT OF A RING GATE OF A HYDRAULIC MACHINE AND HYDRAULIC MACHINE COMPRISING SUCH A DEVICE - A device controls the movement of a ring gate of a hydraulic machine between an open position and a blockage position. The device includes at least four cylinders, the rods of which are suitable for being connected to the ring gate at locations located on a perimeter of the ring gate. The device also includes at least two hydraulic members for synchronizing pistons, the hydraulic synchronization members being connected to the cylinders such as to form at least two groups. Each group encompasses at least two cylinders connected by at least one hydraulic synchronization member, two cylinders belonging to two separate groups not being connected by a hydraulic synchronization member. | 04-25-2013 |
| 20130213213 | LIQUID PISTON ARRANGEMENT WITH PLATE EXCHANGER FOR THE QUASI-ISOTHERMAL COMPRESSION AND EXPANSION OF GASES - The invention relates to a liquid piston arrangement for compressing and expanding gases. The liquid piston arrangement includes a liquid piston which is embodied by a liquid level formed by a liquid in a high-pressure space and a stack of sheets with mutually spaced apart sheet metal plates which is supported in the high-pressure space dipping in the liquid and is sequentially flowed around by the liquid. | 08-22-2013 |
| 20150143988 | Pneumatic Actuation Devices For Valves and the Like - A stepper motor including: a plurality of actuators, each having an actuation rod movable between retracted and expended positions, the actuation rod having an actuation pin movable along with the actuation rod; and a shuttle rotatable about a shaft, the shuttle having a plurality of pockets corresponding to the actuation pin of the plurality of actuators, the plurality of pockets being partially offset from the plurality of pins such that actuation of one or more of the plurality of actuators moves the actuation rod and corresponding actuation pin into a corresponding one of the plurality of pockets to rotate the shuttle about the shaft. | 05-28-2015 |
| 091509000 | Having (1) stand-by or (2) redundant means enabling load to be driven upon failure of primary load moving means | 3 |
| 20080289487 | HYDRAULIC DISTRIBUTOR PROVIDED WITH A DEVICE FOR DETECTING SEIZING - The present invention relates to a hydraulic distributor ( | 11-27-2008 |
| 20130239797 | HYDRAULIC CYLINDER SYSTEM - A hydraulic cylinder system | 09-19-2013 |
| 091510000 | Stand-by means utilizes an auxiliary motive fluid source for another working member to drive same load | 1 |
| 20100071543 | HYDRAULIC APPARATUS - The hydraulic apparatus includes: at least a pumping device for pumping a fluid at a first pressure; at least a user device of the fluid at the first pressure; at least an emergency supply device connectable to the user device activating a connection; at least an activation device of the connection that can be operated at a second pressure of the fluid different from the first pressure and interposed between the user device and the emergency supply device, the activation device having an emergency configuration wherein both the pumping device and the emergency supply device are connected to the user device. | 03-25-2010 |
| 091511000 | Condition responsive means for modifying working member operation | 3 |
| 091513000 | Condition is position of fluid control member of motor other than motor whose operation is modified | 1 |
| 20140123847 | HYDRAULIC EXCAVATOR - In a hydraulic excavator, a hydraulic cylinder drives a boom via a hydraulic fluid discharged from a first hydraulic pump. A first hydraulic circuit connects the first hydraulic pump and the hydraulic cylinder and forms a closed circuit therebetween. A hydraulic motor rotates a revolving upper unit with hydraulic fluid discharged from a second hydraulic pump. A second hydraulic circuit independent from the first hydraulic circuit connects the second hydraulic pump and the hydraulic motor. A motor hydraulic pressure reduction unit reduces the driving hydraulic pressure of the hydraulic motor when a predetermined condition is satisfied. The predetermined condition is a condition in which an operation of the boom operating member to raise the boom and an operation of the rotation operating member to rotate the revolving upper unit are conducted together and an operation amount of the boom operating member is equal to or greater than a predetermined threshold. | 05-08-2014 |
| 091514000 | Pressure responsive valve divides motive fluid between motors | 1 |
| 091516000 | To give one motor priority to motive fluid over another | 1 |
| 20130000478 | HYDRAULIC PRESSURE CONTROL APPARATUS FOR CONSTRUCTION MACHINE - According to the present disclosure, a hydraulic control apparatus for construction machinery comprises: hydraulic pumps; first and second control valve units which control the flow directions of working oil discharged from the hydraulic pumps to supply the working oil to first and second work machines, respectively, and which control the degree of opening of flow channels which interconnect the first and second work machines and the hydraulic pumps, respectively; and a control unit which controls the first and second control valve units in accordance with operating signals inputted from first and second operating units. The control unit determines whether the current work mode is a general work mode or a preferential work mode, and if the mode is determined to be a general work mode, calculates a first degree of opening of a normal channel in accordance with the operating signal inputted from the first operating unit and outputs the calculated first degree of opening of a normal channel to the first control valve unit, and if the mode is determined to be a preferential work mode, calculates a second degree of opening of a normal channel in accordance with the operating signal input from the second operating unit, outputs the calculated second degree of opening of a normal channel to the second control valve unit, and outputs a control signal to the second control valve unit such that the degree of opening of the second control valve unit is smaller than the first degree of opening of a normal channel, so as to preferentially ensure the flow of the working oil being supplied to the first work machine. | 01-03-2013 |
| 091517000 | Condition sensed is working member speed or working fluid pressure of another motor (i.e., fluid pressure or flow to or from expansible chamber of the other motor) | 1 |
| 20090139395 | HYDRAULIC SYSTEM WITH WARM UP CIRCUIT - A hydraulic control system in which a pump for pressurized hydraulic fluid connects with a valve assembly having a valve element displaceable in a chamber to selectively direct fluid to a load driven by the hydraulic system. Surfaces on the end faces of the valve element are exposed to hydraulic pressure from a controller via electro-hydraulic solenoid valves. The surfaces of the valve element adjacent the end faces are undercut to establish a leakage flow path and the solenoid valves are selectively actuated to pressurize the end faces to a level below normal actuation of the valve element but high enough to cause fluid to return to a drain and thus increase the temperature of the hydraulic fluid in the system. | 06-04-2009 |
| 091519000 | With means for selectively changing the speed or force exerted on load by the selective application of motive fluid in a single direction to one or more working members | 1 |
| 20120036994 | HYDRAULIC TRANSMISSION CIRCUIT - A hydraulic transmission circuit is provided having at least two elementary hydraulic motors, each having a secondary enclosure and a main duct for fluid feed and a secondary enclosure and a main duct for fluid discharge. A fluid distributor distributes fluid from the main ducts to the elementary motors via the secondary enclosures. A control system controls the elementary motors. Valves connecting the fluid distributor to the secondary enclosures of the first motor put a secondary enclosure into communication with a main duct independent of an operating mode of any other elementary motor. | 02-16-2012 |
| 091520000 | Motors connected in series | 2 |
| 20090013862 | Dual linear actuator - An actuator having two or more interconnected movement components, wherein the movement components are designed as linear actuators with substantially coaxial longitudinal axes or longitudinal axes that are parallel to each other and that are interconnected in longitudinal direction such that their linear movements are superimposed on one another, and such that at least one of the linear actuators can be stopped at one or several predetermined positions. | 01-15-2009 |
| 20120152108 | AIR PUMP - An air pump comprises a main cylinder, a main piston, a piston rod, a linkage, and a pre-charger. The main piston is reciprocably movable within the main cylinder and defines a compression volume between the main piston and a first end of the main cylinder. The piston rod is connected to the main piston and extends along the main cylinder towards a second end. The linkage is configured to move the main piston and to generate pressure in the compression volume during a compression stroke, the linkage having ends pivotably connected to the main cylinder and to the piston rod. The pre-charger has a pre-charger piston movable within a pre-charger cylinder and is connected to the linkage to move within the pre-charger cylinder when the main piston moves within the main cylinder, the pre-charger generating pressure to augment operation of the main piston and main cylinder. | 06-21-2012 |
| 091525000 | With means to control the working fluid to one working member for movement relative to another without controlling the working fluid to the other working member by said means | 3 |
| 20120024146 | CONTROL METHOD AND CONTROL APPARATUS FOR WORK VEHICLE - The present invention provides a control method and a control apparatus for a vehicle that make it possible to moderate or completely eliminate the impacts generated when the bucket is operated in a tilt direction, from a state in which the bucket in a dump position is forcibly actuated in the tilt direction and the bucket hydraulic cylinder is pressurized by the lifting operation of the boom and also to perform the boom lifting operation with good operability and workability. Control is performed to supply a pressure oil to the bucket hydraulic cylinder so as to actuate the bucket hydraulic cylinder in the tilt direction when a work equipment is being actuated in an actuation region close to an actuation region in which the bucket is forcibly actuated in the tilt direction by lifting the boom in a state in which the bucket is operated to a neutral position or dump operated, or when the bucket is being actuated in the tilt direction in the actuation region in which the bucket is forcibly actuated in the tilt direction. Further, a pressure oil supplied to the bucket hydraulic cylinder is controlled so as to restrict an actuation speed of the bucket hydraulic cylinder in a dump direction when [the work equipment] being actuated in an actuation region close to an actuation region in which the bucket is forcibly actuated in the tilt direction by operating the boom to a neutral position or lowering the boom in a state in which the bucket is dump operated. | 02-02-2012 |
| 091528000 | Control means is fluid pressure operated valve | 1 |
| 20100275771 | Hydraulic System and Mobile Construction Machine - The present invention relates to a hydraulic system having at least two piston-in-cylinder units, at least one equalization line for the pressure equalization between the piston-in-cylinder units and the control pistons, with one respective control piston being associated with a connection of a piston-in-cylinder unit and with at least one 2-way flow regulation valve with a check valve function being in communication with the at least one equalization line. | 11-04-2010 |
| 091530000 | Control means includes separate control valves for each working member | 1 |
| 091531000 | With additional control valve in series with at least one separate control valve in supply line to one of motors | 1 |
| 20080223205 | Hydraulic Drive Apparatus - A hydraulic drive system is mounted on a hydraulic excavator, and is provided with a directional control valve | 09-18-2008 |
| 091532000 | With means for proportioning motive fluid supply to plural motors | 1 |
| 20090101001 | HIGH EFFICIENCY HYDRO-MECHANICAL TRANSMISSION - The present invention generally pertains to hydro-mechanical transmission using fixed displacement motors and pumps in conjunction with two or more mechanical differentials to accomplish continuously variable transfer ratio change and a means to seek the operating point of peak efficiency. In addition a hydraulic transmission is described that uses only one differential. In addition, an all-mechanical by-pass feature is included to allow the operation of road vehicles at high speed for extended periods at high efficiency. A means is described to provide for mechanical stability under all operating conditions. One intended application is a hydraulic transmission system for vehicles using hydraulic regenerative braking. | 04-23-2009 |
| 091534000 | Single valve for relatively movable working members driving common load | 1 |
| 20140137732 | FLOW CONTROL VALVE FOR CONSTRUCTION MACHINERY - A flow control valve for a construction machine is disclosed, which enables a combined operation for simultaneously operating a working device, such as an arm, and a swing device to be easily performed by limiting a part of hydraulic fluid that is supplied to the working device side by a priority valve that is shifted simultaneously or releasing the limiting function through shifting of a spool of the priority valve to a neutral position by pilot signal pressure that is separately applied according to a type of work. | 05-22-2014 |
| 091535000 | Relatively movable working members of unequal cross-sectional areas | 1 |
| 20100192764 | VARIABLE-DISPLACEMENT PISTON-CYLINDER DEVICE - A variable-displacement piston-cylinder device may be adapted for providing work output, and/or for pumping or compressing fluids. The piston-cylinder device defines two or more coaxial cylindrical expansion chambers between a piston having two or more coaxial and conjoined piston members, and a correspondingly-shaped cylinder. Substantially any combination of the expansion chambers may be activated or deactivated in order to vary the effective displacement of the piston-cylinder device. The effective displacement of each piston-cylinder may be changed in mid-operation in order to reduce power output and fuel consumption (or pumping or compressing capacity), without introducing vibration. In addition, a control system is provided for managing the effective displacement of each piston-cylinder according to output required, desirable operating parameters, and other parameters that can effect the operation of the device. | 08-05-2010 |
