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7810585 Bi-directional rotary steerable system actuator assembly and method  
Methods and apparatuses to direct a drill bit of a directional drilling assembly are disclosed. The methods and apparatuses employ the use of bi-directional actuators that are capable of displacing...
7802426 System and method for rapid isothermal gas expansion and compression for energy storage  
The invention relates to systems and methods for rapidly and isothermally expanding gas in a cylinder. The cylinder is used in a staged hydraulic-pneumatic energy conversion system and includes a...
7798052 Fluid pressure cylinder  
First and second cushion rings are arranged respectively on both end surfaces of a piston constituting part of a fluid pressure cylinder, through fitting grooves. The first and second cushion rings...
7793740 Ride control for motor graders  
A ride control arrangement for a machine having a frame, a ripper, a hydraulic actuator operative to move the ripper includes at least one accumulator assembly, and a valve mechanism operatively...
7794212 Multi-piston pump/compressor  
A pump/compressor that utilizes a wedge at a fixed angle to operate the pump's pistons at a fixed stroke. Alternatively the wedge can be moved axially to increase or decrease the clearance volume....
7789190 Hydraulic steering  
The invention concerns a hydraulic steering (1) with a steering unit (2) with feedback behavior, a steering motor (8) connected to the steering unit (2) via working pipes (L, R), a steering member...
7789011 Method for operation of a selector cylinder of an electro-pneumatic selector unit for a motor vehicle gearbox  
A method for actuating a shift cylinder (1) of an electro-pneumatic control unit for the gearbox of a motor vehicle. The gearbox comprising a main gearbox, a group gearbox or other shifting...
7788914 Apparatus operating hydraulic actuator for valve  
The present invention relates to an apparatus operating a hydraulic actuator for valve, which can manually operate the hydraulic actuator for opening and closing the valve by which a flow rate is...
7785083 Dynamic fluid device  
The dynamic fluid device has a first pumping arrangement and second pumping arrangement arranged in parallel with each other to pump a pressurized fluid to user devices; at least a distributor...
7784493 Manual valve of a hydraulic pressure control system for an automatic transmission  
A manual valve of a hydraulic pressure control system for an automatic transmission includes: a valve body including a first exhaust passage that includes an exhausting hole and an intake hole that...
7784392 Hydraulic locking cylinder  
The present invention is a hydraulic locking cylinder assembly comprising a bi-directional control relief valve integrated with a piston. More particularly, the present invention is a...
7785080 Downhole ram pump  
A downhole ram pump. A downhole pump system includes a flow restricting device which variably restricts fluid flow through an opening, the restricting device vibrating in response to the fluid...
7784391 Arrangement for controlling a hydraulically driven motor  
The present invention relates to an arrangement for controlling a hydraulically driven motor, forming part of a hydraulic system in which hydraulic fluid under pressure forms a main flow through a...
7779863 Pressure control valve having an asymmetric valving structure  
The present invention describes, generally, a method and system for controlling the dynamics of an actuatable load functioning or operable within a servo or servo-type system, wherein the dynamics...
7779744 Vehicular hydraulic system with priority valve  
A vehicular hydraulic system with a pump and first and second hydraulic applications arranged in series. A valve is disposed whereby fluid from the pump flows through an inlet port, primary flow...
7771175 Variable displacement compressor  
A link mechanism provided between a lug plate and a cam plate in a variable displacement compressor includes a first transmitting portion for transmitting rotation of a lug plate to a cam plate and...
7765803 Crankless reciprocating steam engine  
We present a high-efficiency crankless reciprocating steam engine that loses only a small amount of energy when the rectilinear motion of its piston is changed into the rotary motion of its...
7765913 Pneumatic brake booster comprising a nonreturn valve for discharging an internal overpressure  
This invention relates to a brake booster (201) having an axis (X), comprising an enclosure divided into a front chamber (210) and a rear chamber (208) by a skirt (209) fastened to a piston (205)...
7765915 Vehicular hydraulic system with dual relief valve  
A vehicular hydraulic system having a hydraulic pump and first and second hydraulic applications arranged in series. A dual relief valve defines first and second flow channels, a passageway and a...
7765914 Displacer unit with a valve plate body  
A displacer unit with a valve plate body is disclosed. The displacer unit having at least one displacer space which is arranged in a cylindrical drum rotating about an axis of rotation and which...
7762321 Hydraulic oil well pumping apparatus  
A hydraulic oil well pumping arrangement employs a compensating type hydraulic pump, a directional valving arrangement and a proportioning valving arrangement. When the directional valve is...
7757597 Variable displacement swash plate type compressor with smooth inclined moving feature  
A variable displacement swash plate type compressor with a smooth inclined moving feature which includes a cylinder block having a plurality of cylinder bores, a front housing disposed at a front...
7753659 Axial cam air motor  
A motor assembly including a body that includes a plurality of cylinders and a plurality of air channels and a conical shaped piston slidably coupled within each of said plurality of cylinders. The...
7752842 Circuit for controlling a double-action hydraulic drive cylinder  
Circuit for controlling a double-action hydraulic drive cylinder includes a directional control valve having working ports A and B, a pump port P, and a tank port T, wherein the directional control...
7752957 Hydraulic motor  
A hydraulic motor with rotating shaft coupled to a piston with alternating rectilinear displacement. The hydraulic motor comprises a casing enclosing a rotating shaft, a piston and an inverter...
7751959 Semi-active suspension system with anti-roll for a vehicle  
A suspension system includes four electronically controlled actuators, one at each of the four wheels. The actuators are each controlled by an electronic control unit. The left front and right...
7748309 Axle locking cylinder structure for heavy construction equipment  
An axle locking cylinder structure is capable of enabling an operator of heavy construction equipment to stably carry out an axle locking operation since a sudden variation of the flow rate is...
7748308 Pneumatic biasing of a linear actuator and implementations thereof  
An improved method and apparatus are provided for constructing and operating a linear actuator, and equipment incorporating a linear actuator, by operatively connecting a pressure biasing pneumatic...
7743791 Air control module unit for portable pneumatic tool  
The present invention generally relates to an air control module unit for a portable pneumatic tool, more particularly, to an air control module unit that actuates a valve stem inside an air inlet...
7739940 Directional control valve device and fluid pressure cylinder device  
In a directional control valve device, a first passage connects a second port with a first port by using a part of a movement path of a moving valve element when the moving valve element is in a...
7739941 Hydraulic drive system and method of operating a hydraulic drive system  
A hydraulic drive system comprises a hydraulic actuator comprising a piston reciprocable between two cylinder heads for actuating a machine. A flow switching device reverses the direction of...
7740556 Hydraulic control apparatus and hydraulic control method  
A hydraulic control apparatus includes two oil flow control valves (30, 32) each provided with a supply control portion (36, 38, 52, 54) for controlling an oil supply from a pressurized oil source,...
7739943 Vehicular hydraulic system with pressure dump and relief valve arrangement  
A vehicular hydraulic system having a pump, first application, pressure-dump valve and second application arranged in series. The pressure-dump valve diverts a portion of the primary fluid flow...
7739942 Vehicular hydraulic system with pressure dump valve  
A vehicular hydraulic system with a pump and first and second hydraulic applications arranged in series. The fluid upstream of the first application may be elevated to a first threshold pressure...
7735516 Lift axle control module  
A lift axle control module is disclosed that is simpler than prior art lift axle control systems, and does not require cycling the input pressure to the regulator. The module includes a housing...
7735447 Shock absorbing fluidic actuator  
According to one aspect of the invention, a fluidic actuator and a control system for the fluidic actuator may be provided. A first component of the actuator may have two openings interconnected by...
7735508 Rotary slide valve  
A rotary slide valve, in particular for speed-dependent power steering systems in motor vehicles, has a torsion bar, a rotary slide, and a control bushing. The control bushing is pressed onto a...
7731485 Reciprocating cylinder swash plate pump  
The invention relates to a hydraulic device having, in a housing, a rotor, which can rotate about a first axis, with pistons and chambers on both sides of the rotor, which can rotate about a second...
7730825 Vehicular hydraulic system with priority valve and relief valve  
A vehicular hydraulic system having a pump, flow-splitting valve, first application and second application arranged in series. The flow-splitting valve diverts a portion of the primary fluid flow...
7730873 Valve controlled throttle mechanism in a heat regenerative engine  
In an engine having at least one cylinder with a reciprocating piston and a connecting rod for driving rotation of a crank disk and a crankshaft, a cam sleeve is moved along the crankshaft in...
7730827 Attachment structure of swash plate support and hydraulic apparatus  
To provide an attachment structure of a swash plate support, that is, an attachment structure which suppresses an unstably fixed state of the swash plate support and realizes easy attachment and...
7726124 Blast simulator with high velocity actuator  
A high velocity actuator, which may be used as a blast simulator, is provided with an actuator cylinder tube having an opening at first and second cylinder ends, and an actuator piston rod slidably...
7721641 Air compression apparatus and method of use  
An air compression apparatus has a frame, a tank, and a motor. A drive mechanism is operably connected to the motor and at least one piston assembly is operably connected to the drive mechanism and...
7721640 Cable operated gas cylinder  
A cable operated gas cylinder comprises: a base tube; a spindle which is inserted at hollow part in said base tube; a cylinder which is mounted within said spindle; a piston dividing the gas-filled...
7717025 Fluid actuator with limit sensors and fluid limit valves  
A fluid actuator with fluid limit valves (550, 551) and adjustable mechanical limits enables the construction of fluid linkages which are able to completely replace mechanical linkages. In a fluid...
7718916 Low impact spot welding cylinder using dual pistons  
A weld cylinder having a dual piston arrangement is provided. The cylinder has a movable retract piston assembly with the piston arranged within the retract piston assembly. The piston supports a...
7714247 Low impact spot welding cylinder using single piston  
A weld cylinder having a single piston arrangement is provided. The cylinder has a movable retract piston assembly with the piston arranged within the retract piston assembly. The piston supports a...
7713033 Double-acting, duplex pump controlled by two, two position spool valves  
The present invention provides a fluid control system and associated methods. The fluid control system includes a source of a pressurized fluid and a first spool valve having at least two...
7703478 Shifting unit  
In a shifting unit (1) for a vehicle transmission gearbox, the switching unit comprising valves which are connected between with one another by a pressure supply line conduit (58) and by a pressure...
7699585 Swash plate type compressor  
In a swash plate type compressor, refrigerant in a discharge pressure region is introduced into a crank chamber through a supply passage while the refrigerant in the crank chamber is drawn out to a...