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8365762 Hydraulic control system  
A control system for transferring fluid between a fluid supply and a process. The control system includes a transfer controller, which outputs a transfer signal that corresponds to a time varying...
8360158 Overriding a primary control subsystem of a downhole tool  
A system that is usable with a well may include a piston, a primary control subsystem and an override subsystem. The piston actuates the downhole tool, and the primary control subsystem may be...
8359862 Steam turbine engine  
A steam turbine engine that converts highly compressed steam to mechanical rotatative torque. An upper sealing gate and lower sealing gate alternately open and block the intake port and exhaust...
8360097 Valve actuator and throttle valve assembly employing the same  
Embodiments of a valve actuator are provided for adjusting the position of a main valve element in relation to the pressure of a fluid supplied by a supply duct. The valve actuator includes a...
8360531 Hydraulic brake system  
Embodiments of a hydraulic brake system are disclosed. In one embodiment, a priority flow control valve for supplying operating pressure has a first orientation in which operating pressure is...
8359857 Compressor and/or expander device  
Systems and methods for operating a hydraulically actuated device/system are described herein. For example, systems and methods for the compression and/or expansion of gas can include at least one...
8356545 Load-sensing (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...
8356544 Raising drive and method for controlling a raising drive  
The invention concerns a method for controlling a raising drive, the raising process occurring by means of pressure activation of at least one lift cylinder and the lowering process occurring by...
8356547 Variable length bent-axis pump/motor  
In a bent axis hydraulic machine, a back plate and cylinder barrel vary in distance from a drive plate as a stroke angle of the cylinder barrel changes, thereby minimizing unswept fluid volume in...
8356546 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...
8353241 Hydraulic cylinder cushion  
A hydraulic cylinder cushion including a cylinder having a longitudinal axis and an inner chamber, a piston rod having a base, a cushion spear having a spear base, a shaft extending from the spear...
8355820 Oven testing fixture and method  
A testing apparatus is provided for opening and closing a door of an appliance being tested. The apparatus includes a framework; a first actuator attached to the framework, the first actuator...
8347778 Fluid-working machines  
A fluid-working machine comprises at least one primary working chamber such as a cylinder (4) of cyclically changing volume and primary valves (7) to control the connection of the at least one...
8348627 Digital hydraulic pump/motor torque modulation system and apparatus  
The present invention provides a hydraulic pump for use in driving a load with a control modulation system which modulates a primary control signal in order to accommodate variations in secondary...
8347617 Hydralic two-circuit system and interconnecting valve system  
A hydraulic two-circuit system (2, 4) for activating consumers (A1, B1; A2, B2; A3, B3) of a mobile unit, for example a track-laying unit, and an interconnecting valve arrangement (38), which is...
8348237 One kind of foot pedal hydraulic jack with two speed pump, and there is a pneumatic set to lift piston quickly on the jack  
In pneumatic non-load quick dual-speed hydraulic jack, the small of piston ring (17) of hydraulic pump cylinder integrates with pump body (19) and external ring of step pump core (14) to form...
8342816 Engine-driven hydraulic pump  
Engine-driven hydraulic pump for an aircraft, having a first and a second pump unit which each comprise an adjustable swash plate and a piston assembly coupled with said swash plate and driven by...
8336444 Hydraulic cylinder  
A pressure-receiving face plate 29 is mounted on one end face of a piston 12, and a support member 26 is raised on the end face of the piston 12. Disposed on the support member 26 with an...
8336443 Hydraulic working machine  
A hydraulic circuit for a hydraulic working machine is composed of a main pump 21, a boom cylinder 11 arranged for extension or contraction by pressure oil from the main pump 21, a directional...
8327750 Valvetrain oil control system and oil control valve  
A hydraulic control system includes an oil control valve to control oil flow within a valvetrain. The control valve varies the flow rate to actuate an engine component from a first position to a...
8327751 Wabble plate type variable displacement compressor  
A wabble plate type variable displacement compressor comprises a rotation preventing mechanism of the wabble plate which includes (a) an inner ring provided movably in the axial direction although...
8322470 Maneuvering robotic vehicles having a positionable sensor head  
Configurations are provided for vehicular robots or other vehicles to provide shifting of their centers of gravity for enhanced obstacle navigation. Various head and neck morphologies are provided...
8316757 Hydraulic control valve assembly with monolithic body and single spool port lock  
A hydraulic control valve with a monolithic body having four sides located between a top and a bottom, and all pilot ports on a body front side, valve work ports on the top side, three bores...
8313082 Proportional position feedback hydraulic servo system  
A system for positioning a device such as a valve with a mechanical input using a fluid operated actuator, a mechanical position feedback member coupled to a feedback element of the fluid operated...
8307752 Piston hydraulic motor  
A hydraulic motor having pistons, some of which are in a working phase and some are in a non-working phase, whereby the pistons are adapted to rotate the piston hydraulic motor's shaft or casing....
8307852 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...
8302525 Hydraulic stepless transmission  
A hydraulic stepless transmission having increased layout freedom and a compact structure with the functions of conventional hydraulic stepless transmission retained and having increased easiness...
8303263 Swash plate type compressor  
The present invention relates to a compressor, wherein a rotary shaft 140 having a swash plate 144 coupled thereto is used to linearly reciprocate a piston 150 in a cylinder bore 134 formed in...
8297178 Servobrake  
A servobrake for motor vehicles including a control valve which can be actuated by an electromagnet independently of an actuating rod which displaces a valve piston, which electromagnet actuates a...
8297924 Actuation system, helicopter using the same, and controlling method therefor  
An actuation system includes a pump assembly configured to form a pump chamber, an actuator having first and second chambers and a movable member and configured to convert pressures applied to the...
8301307 Pneumatic actuator system and method  
A pneumatic actuator system (200) is provided according to the invention. The system (200) comprises a pneumatic actuator (100) including an actuator component (108), with the pneumatic actuator...
8301276 Control device for the position control of a hydraulic cylinder unit comprising a linearization unit  
A control device for the position control of a hydraulic cylinder unit has a controller which receives a set and an actual piston position and determines a preliminary manipulated variable based...
8297239 Gyroscopic rotary engine  
A gyroscopic rotary engine includes a rotary disc used as a cylinder block; a cylinder head on which medium inlets and medium outlets are arranged in a spaced relation; wherein at least two arched...
8291925 Method for operating a hydraulic actuation power system experiencing pressure sensor faults  
A method for operating a hydraulic actuation system during a pressure sensor malfunction is provided. The hydraulic actuation system includes a pump, a reservoir, a first work-port and a second...
8286652 Configurable active jerk control  
A method of limiting jerk in a hydraulic system of a machine includes defining a maximum pressure rate. An output pressure of a hydraulic fluid is continuously measured over time from a work port...
8286543 Valve assembly for an actuating device  
A valve assembly for controlling the flow of pressurized fluid supplied to an actuating cylinder having a piston driven by the pressurized fluid along a stroke path therewithin, the pressurized...
8286544 Hydraulic control system  
A hydraulic control system for controlling at least two consumers (2, 4) includes a pump (6) with an adjustable delivery quantity. The consumers are each associated with an adjustable metering...
8290631 Methods and apparatus to arbitrate valve position sensor redundancy  
Example methods and apparatus to arbitrate valve position sensor redundancy are disclosed. A disclosed example method comprises measuring a first value representative of a position of a valve,...
8287248 Compressor  
A system is provided for maintaining the position of a valve in a compressor. The valve includes a valve body connected to a piston in a cylinder by a shaft. The valve body is positioned in the...
8282070 Apparatus and methods for manual override operation of a linear actuator  
Apparatus and methods for manual override operation of a linear actuator are described. An example apparatus includes a base to be mounted to an actuator. A drive member is operatively coupled to...
8281707 Piston for a hydraulic motor having radial pistons, and a method of manufacturing such a piston  
A piston for a hydraulic motor including a body having a guiding and sealing surface, a base, and a top, which top is providing with a cradle-shaped recess. The base is provided with an additional...
8281705 Method for detecting the drive type of an actuator (II)  
A method is disclosed for detecting the drive type of an actuator, e.g., a pneumatic actuator, having a positioner for operating a final control element in a process engineering plant. The...
8276841 Hydraulic actuator with end position damping  
A hydraulic actuator includes, but is not limited to a first outflow and a second inflow and outflow as well as a closure device for closing the second inflow and outflow in the direction of...
8272315 Dual pump  
A dual pump apparatus having two pumps mounted in a housing, where the housing comprises two elements mounted on opposite sides of a hydraulic mounting member or center section. The pumps are...
8267487 Regenerative braking actuator apparatus  
An actuator apparatus includes a booster creating an infinite boost ratio while a plunger valve does not contact with a reaction disc, and an oil reservoir and a pedal simulator unit forming a...
8266902 Valve module  
A fluid power valve module has a supply port for fluid and at least one fluid power and more especially pneumatic valve able to be controlled via the control interface of the valve module for...
8267004 Adaptable hydraulic control system  
An adaptable hydraulic control system configured to be used with either open-center or closed-center hydraulic power systems which may include one or more switches, one or more hydraulic circuits...
8262371 Pneumatic control device for supplying hydraulic fluid  
A pneumatic control device includes a base comprising a reservoir, a first check valve for only allowing hydraulic fluid to flow into the reservoir, and a second check valve for only allowing the...
8261655 Locking piston assembly  
A locking piston assembly (100) is provided according to the invention. The locking piston assembly (100) includes a piston chamber (107), a piston rod (106) configured to be substantially...
8265848 Method and apparatus for adapting minimum torque converter slip for neutral idle control  
A method adaptively learns torque converter (TC) slip in a transmission having a hydrodynamic torque converter assembly by setting a baseline TC slip profile, determining an actual TC slip value...