| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 091418000 |
WITH MOTIVE FLUID VALVE
| 143 |
| 091472000 |
THREE OR MORE CYLINDERS ARRANGED IN PARALLEL RADIAL OR CONICAL RELATIONSHIP WITH ROTARY TRANSMISSION AXIS
| 77 |
| 091358000 |
WORKING MEMBER POSITION FEEDBACK TO MOTIVE FLUID CONTROL
| 76 |
| 091508000 |
PLURAL RELATIVELY MOVABLE OR RIGIDLY INTERCONNECTED WORKING MEMBERS
| 24 |
| 091392000 |
WORKING MEMBER POSITION RESPONSIVE MOTIVE FLUID CONTROL
| 22 |
| 091218000 |
CYCLICALLY OPERABLE
| 21 |
| 091001000 |
WITH SIGNAL, INDICATOR OR INSPECTION MEANS
| 15 |
| 091041000 |
WITH CORRELATED CONTROL OF MOTIVE FLUID AND LOCKING MEANS
| 14 |
| 091170000 |
RELATIVELY MOVABLE WORKING MEMBERS WITH ONE HAVING MOTIVE FLUID CONTROLLED BY, MOVABLY INTERCONNECTED WITH OR MOVED BY ANOTHER
| 11 |
| 091165000 |
APPLICATION OF MOTIVE FLUID AT DIFFERENT PRESSURES TO OPPOSED WORKING MEMBER FACES
| 11 |
| 091055000 |
COMBINED
| 11 |
| 091471000 |
MISCELLANEOUS (E.G., METHODS, ETC.)
| 10 |
| 091006000 |
FLUID SUPPLY THROUGH DIVERSE PATHS TO SINGLE EXPANSIBLE CHAMBER
| 9 |
| 091005000 |
WORKING MEMBER MOVED BY STORED MOTIVE FLUID CHARGE
| 7 |
| 091004000 |
HYDRO-PNEUMATIC
| 7 |
| 091415000 |
DIFFERENTIAL
| 6 |
| 091152000 |
MULTIPLE EXPANSION | 5 |
| 20140026747 | HYDRAULIC OR PNEUMATIC DRIVE FOR ACTUATING A FITTING COMPRISING A CONTROL VALVE OR SELECTOR VALVE - A safety circuit for valves actuated hydraulically via a positioning cylinder. The positioning cylinder in one embodiment is configured to be hydraulically or pneumatically depressurized in an emergency. The positioning cylinder has two cylinder chambers configured to be fluidically connected via a working line. A first and a second series-connected shut-off valve are provided in the working line. The positioning cylinder in another embodiment is configured to be hydraulically or pneumatically actuated in an emergency. The positioning cylinder has at least one first cylinder chamber configured, in an emergency, to be supplied with pressurized fluid via a first pressure medium flow path. A first and a second series-connected shut-off valve are provided in the first pressure medium flow path. | 01-30-2014 |
| 20110232474 | TWO-STAGE SUBMERSIBLE ACTUATORS - The present invention provides an improved two-stage actuator ( | 09-29-2011 |
| 20140360348 | ROTARY ACTUATOR - A rotary actuator ( | 12-11-2014 |
| 20130284010 | TELESCOPIC CYLINDER - A telescopic cylinder comprises a housing, a nestable first sleeve, a nestable second sleeve, and a nestable piston rod. A dividing wall is disposed at at least one of the first ends of the first and the second sleeves thereby defining a first chamber between the housing and the at least one of the first ends of the first and second sleeves, and a second chamber between the at least one of the first ends of the first and second sleeves and the piston rod. A valve extends through the dividing wall for selectively allowing communication from the second chamber to the first chamber when pressure inside the second chamber is above a predetermined pressure. A method of extending a telescopic cylinder where the at least second sleeve extends before the at least first sleeve is also presented. | 10-31-2013 |
| 20110214563 | FREE-PISTON COMPRESSED-GAS ENGINE VARIANT AND ENGINE PINION WITH SEVERAL DECOMPRESSION STAGES AND RETURN SPRINGS - The present utility model is a free-piston engine comprising pinions, with various stages, providing excellent efficiency and control. | 09-08-2011 |
| 091047000 |
CONSTANTLY APPLIED MOTIVE FLUID WITH CONTROLLED VENTING | 4 |
| 20110030547 | FLUID DRIVEN RECIPROCATING LINEAR MOTOR - A reciprocating linear motor powered by one directional fluid flow is provided, having small external diameter, optimized for length, with few moving parts and effective seals, low mass and thus low inertia in direction changes. The motor provides reciprocating linear powered motion for use by attached equipment such as a pump, chisel, hammer, valve, or other machine requiring such power. | 02-10-2011 |
| 20160025114 | Actuator Limit Controller - In some applications, a piston of a hydraulic actuator may move at high speeds, and large undesired forces may be generated if the piston reaches an end-stop of the hydraulic actuator at a high speed. The undesired forces may, for example, cause mechanical damage in the hydraulic actuator. A controller may receive information indicative of the piston reaching a first position at a first threshold distance from the end-stop, and, in response, may modify a signal to a valve assembly controlling flow of hydraulic fluid to and from the hydraulic actuator. Further, the controller may receive information indicative of the piston reaching a second position at a second threshold distance closer to the end-stop of the hydraulic actuator, and, in response, the controller may further modify the signal to the valve assembly so as to apply a force on the piston in a away from the end-stop. | 01-28-2016 |
| 20090165639 | ACTUATOR AND METHOD FOR PRODUCING MECHANICAL MOTION - A system for producing mechanical motion is provided. The system includes an actuator having a first end, a second end, and a radially expandable bladder assembly extending therebetween, and a source of pressurized fluid external to said actuator. The bladder assembly further includes an inner cavity. In addition, a substantially fixed-volume reservoir positioned within the cavity is provided, wherein the bladder assembly is configured to expand in a radial direction and contract in an axial direction when a volume of fluid is introduced from the reservoir into the inner cavity. | 07-02-2009 |
| 20160376936 | HYDRAULIC LASH ADJUSTER - In a lash adjuster used for a valve operating mechanism of an internal combustion engine, there is known a lash adjuster constituted by inserting a cylindrical sleeve into a plunger cap for preventing air from entering a high-pressure chamber located at a lower portion of the lash adjuster. However, in the conventional lash adjuster, since the plunger cap is formed with two side holes which are different in height in the axial direction of the plunger cap, it becomes complicated to regulate the side surface the plunger cap which corresponds to a sliding surface. Therefore, it is problems to be solved by the present invention to provide a lash adjuster in which the side surface of the plunger cap can be easily regulated without disturbing the inflow and outflow of oil and whose machining cost can be kept low. | 12-29-2016 |
| 091061000 |
ROTARY AND RECIPROCATING WORKING MEMBERS | 3 |
| 20090260514 | Apparatus for Compensating and/or Transmitting Forces or Torques and Rotational Movements Between Two Components - An apparatus for compensating and/or transmitting forces/torques and rotational movements between two components, particularly for compensating for vehicle movements, in which at least one joint module is situated between the two components, which joint module converts a translational and/or rotational movement of a piston, to which a pressure medium is applied, into a rotational movement of at least one first rotatable shaft or of a first and a second rotatable shaft. | 10-22-2009 |
| 20090272255 | Vibrator - A linear vibrator having an internal cylindrical bearing surface forming a chamber therein and a fluid inlet to direct a fluid into the chamber with a one piece piston slideable located therein with the piston simultaneously rotatable and axially displaceable therein with the piston including a static port to bias the piston and thereby induce piston oscillation when fluid is introduced into the vibrator. | 11-05-2009 |
| 20140230644 | ACTUATOR APPARATUS AND A METHOD FOR INTEGRATING THIS ACTUATOR INTO TURBOMACHINERY - Apparatus and method for integrating an actuator into turbo-machinery and operating the actuator based on process fluid associated with the turbo-machinery. The integrated actuator mechanism includes an actuator casing; a balance drum, with labyrinth seals, and recovery spring, configured to apply force to the balance drum, in the actuator casing; an actuation bar connected to the balance drum and configured to move linearly in the direction of the balance drum; and a connection mechanism connecting a diverted portion of turbo-machinery process fluid to the actuator casing for applying force, in an opposite direction of the spring force, to the balance drum. The labyrinth seals allow the diverted turbo-machinery process fluid to bleed through and return to the turbo-machinery. | 08-21-2014 |
| 091196000 |
MOVING CYLINDER | 3 |
| 20160195113 | SERVO-CONTROL AND AN AIRCRAFT HAVING SUCH A SERVO-CONTROL | 07-07-2016 |
| 20080216641 | Motor Fluid Drive, Especially for Rotary, Pivotal or Linear Drive Units and Corresponding Method - The invention relates to a drive, especially for rotary, pivotal or linear drive units, comprising a working piston ( | 09-11-2008 |
| 20130284011 | VARIABLE DISPLACEMENT HYDRAULIC MACHINE, IN PARTICULAR FOR A MOTOR VEHICLE - The invention relates to a variable displacement hydraulic machine, in particular for a motor vehicle, said hydraulic machine comprising a rotating cylinder ( | 10-31-2013 |
| 091169000 |
SINGLE CHAMBER FORMED BY MUTUALLY RELATIVELY MOVABLE CYLINDER, SLEEVE AND PISTON | 3 |
| 20090165640 | Booster pump and low-temperature-fluid storage tank having the same - A low-temperature-fluid storage tank capable of efficiently increasing the pressure of fluid without heating the fluid is provided. There is provided a booster pump which includes a piston having a piston head and a piston rod and a cylinder having a compression chamber that accommodates the piston head so that a fluid is compressed by one end surface of the piston head. The piston head is provided with a bellows for separating a space adjacent to the piston rod from a space adjacent to the cylinder in the compression chamber. | 07-02-2009 |
| 20120279386 | HYDRAULIC SUPPORT ELEMENT - A hydraulic support element having a housing, a pressure piston, a high pressure chamber for a hydraulic means extending between a bottom face of the pressure piston and a bottom of the housing, wherein the housing includes a passage for the hydraulic means, which communicates radially inwardly with an aperture in the pressure piston, wherein the pressure piston includes a deflecting sheath for the hydraulic means, tightly contacting the pressure piston at the interior jacket axially below the aperture and extending to the proximity of a head of the pressure piston, wherein a rising line for the hydraulic means is formed between the deflecting sheath and the interior jacket, which starts at the aperture and leads in the area of the head into a reservoir inside the deflecting sheath directly in front of the return valve and with the deflecting sheath having at least one perforation axially above its contact. | 11-08-2012 |
| 20130333551 | TELESCOPIC BELL PISTON FOR PUMP - A piston pump dispenser in which a volume in a compartment defined inside a piston chamber-forming member and between axially spaced discs on a piston varies with movement of the piston in a cycle of operation due to the piston having a tubular portion between the discs which varies in axial length. The tubular portion has a circumferentially extending wall in the shape of a solid of revolution about an axis of the piston with opening through the wall for fluid flow. The tubular portion acts as a spring to axially bias the axially spaced disc apart. | 12-19-2013 |
| 091357000 |
SELECTIVELY USABLE OR POSITIONABLE WORKING MEMBER CONTROLLED VENT IN CHAMBER WALL (402) | 2 |
| 20110239855 | SINGLE EFFECT HYDRAULIC CYLINDER - The invention belongs to the field of single-effect hydraulic cylinders. It relates to a device that makes it possible to limit the pressure in the pressurization chamber of a single-effect cylinder when the rod thereof is in a particular range of longitudinal positions of safety, while respecting the operating safety of the device, that is, in the case that the power supply of the pilot valves of the distributors and of the hydraulic pump is cut, the rod of the cylinder remains in its position if this position does not lie within the safety position range | 10-06-2011 |
| 20140360350 | Vented Pressurized Gas-Powered Actuator - A vented pressurized gas-powered actuator includes a housing having a central longitudinal axis and an inner surface. The inner surface has a constant radius between first and second planes extending perpendicular to the axis. At least one vent groove extends from the inner surface in a direction away from the axis. The at least one vent groove has a first end intersecting the first plane and a second end intersecting the second plane. | 12-11-2014 |
| 091035000 |
INDEPENDENTLY OPERATED TIMER, DELAY, PATTERN OR CYCLIC CONTROL | 2 |
| 20130327206 | COMPRESSED FLUID MOTOR, AND COMPRESSED FLUID POWERED VEHICLE - A compressed fluid motor comprising at least one solenoid valve, motor timing sensor, and controller for operating the motor. | 12-12-2013 |
| 20160169222 | FLUID-WORKING MACHINE AND OPERATING METHOD | 06-16-2016 |
| 091355000 |
CUTOFF AFTER SINGLE COMPLETE CYCLE | 1 |
| 20110011256 | HOOD-LIFTING ACTUATOR WITH DISARMABLE RETURN BRAKING ARRANGEMENT - The triggered stroke actuator comprises a cylinder ( | 01-20-2011 |
| 091034000 |
SINGLE ACTING, CHANGEABLE TO OR FROM DOUBLE ACTING | 1 |
| 20140076153 | Hydraulic Arrangement for a Lifting Unit - A hydraulic arrangement for lifting and/or lowering at least one implement carrying arm on an agricultural machine. The arrangement comprises an inlet hydraulic line and an outlet hydraulic line connecting a fluid pump ( | 03-20-2014 |
| 091054000 |
CONVERTIBLE; OR CHANGEABLE BY DISASSEMBLY OR ASSEMBLY | 1 |
| 20120167758 | Vacuum motor airflow series/parallel switching apparatus - An apparatus for transitioning at least a first vacuum motor and a second vacuum motor between an air series configuration and an air parallel configuration is provided. The apparatus comprises a controllable switching valve, a first check valve, a second check valve and a plurality of chambers. The switching valve is positioned in communication with the first vacuum motor air outlet and the second vacuum air inlet. The apparatus is configured so that when the switching valve is opened the vacuum motors are configured air series and when the switching valve is closed the vacuum motors are configured air parallel. The first and the second check valves are opened or closed by pressure differential between chambers. | 07-05-2012 |
| 091167000 |
EXTENSION OF UNIT HAVING SEPARATELY CONTROLLED WORKING CHAMBERS EQUALS SUM OF INDIVIDUAL CHAMBER EXTENSIONS | 1 |
| 20140109759 | CYLINDER DEVICE WITH FORCE MULTIPLIER - A first piston ( | 04-24-2014 |
| 091059000 |
TORQUE RESPONSIVE MOTIVE FLUID CONTROL | 1 |
| 20110259187 | DIGITAL HYDRAULIC SYSTEM - A method and a pressurized medium system, including: at least one actuator to generate sum forces effective on a load; a working chamber operating by displacement and located in the actuator; a charging circuit of a higher pressure, which is a source of hydraulic power; a charging circuit of a lower pressure, which is a source of hydraulic power; a control circuit, that couples the charging circuit of higher pressure and the charging circuit of lower pressure, in turn, to the working chamber; wherein the working chamber is capable of generating force components that correspond to the pressure of the charging circuit to be coupled to the working chamber, and each force component produces at least one of the sum forces either alone or in combination with the force components produced by the other working chambers of the actuator. | 10-27-2011 |
| 091052000 |
CONSTANTLY OPEN THROTTLED EXHAUST WITH CONTROLLED MOTIVE FLUID SUPPLY | 1 |
| 20120031262 | HYDRAULIC CYLINDER - A hydraulic cylinder includes a piston that defines a driving pressure chamber and a cushion pressure chamber within a cylinder tube, an air chamber defined inside a hollow piston rod, an orifice that leads a working fluid in the cushion pressure chamber into the air chamber when the cushion pressure chamber contracts during an extension operation, a check valve that returns a working fluid in the air chamber to the driving pressure chamber when a differential pressure between the air chamber and the driving pressure chamber rises to or above a predetermined value, and a valve housing that houses the check valve. A throttle gap is defined between an outer peripheral surface of the valve housing and an inner peripheral surface of the piston rod, and a working fluid ejected from the orifice during the extension operation flows into the air chamber through the throttle gap. | 02-09-2012 |
