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9021796 Pipelayer  
A pipelayer includes a pilot pressure control unit. The pilot pressure control unit supplies hydraulic fluid to a pilot port of a warm-up control valve so that the warm-up control valve enters an...
8997476 Hydraulic energy recovery system  
A machine includes a hydraulic cylinder configured to raise and lower a boom of the machine, and an accumulator selectively fluidly connected to the hydraulic cylinder. The accumulator is...
8997471 Hydraulic system having dual manifolds  
A hydraulic system for a machine is disclosed. The hydraulic system may include a fluid tank, a first manifold, a valve body, a second manifold, and a plurality of conduits. The first manifold may...
8984872 Hydraulic accumulator fluid charge estimation system and method  
A method for estimating a fluid charge of a hydraulic accumulator includes determining a first accumulator pressure at a first time with a pressure sensor, the first time during accumulator...
8955316 Drive train device  
In a drive train device, in particular a motor vehicle drive train device, with a working fluid pressure system for providing an operating fluid pressure including at least a first and a second...
8915076 Transmission hydraulic control system having flow augmentation  
A system for providing pressurized hydraulic fluid includes an engine driven main pump and an electrical motor driven auxiliary pump. The auxiliary pump provides hydraulic fluid at line pressure...
8910473 Pipe layer and warm-up method for pipe layer  
A warm-up pilot pressure control unit adjusts pilot pressure inputted to a first flow channel open/close unit so that the flow channel open/close unit is switched to an open state when a warm-up...
8876495 Case flow augmenting arrangement for cooling variable speed electric motor-pumps  
Example fluid circuits (e.g., within aircrafts) include first and second pump assemblies. The first pump assembly has an electric motor and a first fluid pump. The first fluid pump is coupled to...
8857170 Gas pressure reduction generator  
A Gas Pressure Reduction Generator (GPRG) System and a method for implementing a GPRG System is provided, where the GPRG System includes a gas inlet configured to receive a pressurized gas flow...
8857188 Hybrid drive device  
A hybrid drive device including an electric motor; an automatic transmission; a lubricating oil passage to which a lubricating oil pressure is supplied; and a switching valve that is switched...
8844279 Hydraulic fan circuit  
A hydraulic fan circuit includes a primary pump, a motor fluidly connected to the primary pump, and a fan operably connected to and driven by the motor. The circuit also includes a supply passage...
8844278 System and method for controlling an electro-hydraulic charging system  
The disclosure describes, in one aspect, a control system for charging an electro-hydraulic charging system. The control system including at least one sensor operatively coupled to an engine for...
8793989 Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange  
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a...
8783027 Pressure regulation circuit for turbine generators  
A pressure regulation circuit delivers pressurized fluid into a generator. The circuit includes pressure regulator structure and a primary valve. The pressure regulator structure outputs...
8745983 Hydraulic fluid cooling system for pair of integrated hydrostatic transmissions with auxiliary hydraulic circuit  
A hydraulic fluid cooling system for a pair of integrated hydrostatic transmissions includes a common reservoir holding hydraulic fluid and having hydraulic lines connecting the common reservoir...
8739522 Systems and methods for pre-heating compressed air in advanced adiabatic compressed air energy storage systems  
Systems and methods provide for capturing heat energy in a power generation system. The system includes: a first compressor configured to exhaust a first compressed, heated air flow; a heat...
8720197 Flow management system for hydraulic work machine  
A flow management system capable of providing adjustable hydraulic fluid flow or pressure at a common line to supply bidirectional pumps in electro-hydrostatic actuation systems and conditioning...
8701397 Operating oil supplying device and construction machine  
A hydraulic oil supply device includes: a work equipment pump that supplies a hydraulic oil to a hydraulic actuator that drives a work equipment; a fan pump that supplies the hydraulic oil to a...
8668467 Integrated fluid handling apparatus  
An integrated fluid handling apparatus 10 includes a power take off device 108 having a rotating power take off mechanism 122, a hydraulic pump 104 having a rotating fluid pump mechanism 146, a...
8647087 Cooling system for gerotor motor  
A hydraulic motor having a cooling system includes a stator, a rotor that rotates and orbits in the stator, a drive link connected to the rotor, and a housing connected with the stator. The...
8646264 Cooling system and a transmission system having said cooling system integrated therewith  
The present invention provides a cooling system such as employed in cooling a heat source and a transmission system having said cooling system integrated therewith. The cooling system further...
8627656 Oil supply device for vehicle  
An oil supply device for a vehicle includes an oil pump driven by a rotation of an internal combustion engine, a hydraulic actuator to which oil is supplied from the oil pump, an engine...
8601804 Power generating apparatus of renewable energy type  
A power generating apparatus includes a rotating shaft, a hydraulic pump driven by the rotating shaft, a hydraulic motor driven by operating oil supplied from the hydraulic pump; and a generator...
8567183 Multistage hydraulic gas compression/expansion systems and methods  
Multistage hydraulic systems and methods for converting the potential energy of a pressurized gas, particularly air, into mechanical work when operating in motor, and for producing compressed gas...
8534059 Pressure reducing gas storage device, air-jet system, and motor vehicle  
A pressure reducing gas storage device, an air-jet system and a motor vehicle are disclosed herein, wherein the pressure reducing gas storage device comprises a gas storage tank including an inlet...
8534061 Dump truck  
A dump truck includes: an oil-cooling center brake; a first hydraulic pump supplying cooling oil to the center brake; a second hydraulic pump supplying cooling oil to the center brake in addition...
8484962 System and method for the temperature regulation of a hydraulic fluid  
The invention relates to a system for regulating a temperature of hydraulic fluid in at least one hydraulic circuit of an aircraft, wherein, in a periphery of the aircraft, additional hydraulic...
8468814 Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange  
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a...
8468818 HST cooling circuit  
There are provided: an HST hydraulic circuit that is formed through a closed circuit connection of a variable displacement hydraulic pump 2 and first and second variable displacement hydraulic...
8413437 Transmission hydraulic control system having independently controlled stator cooling flow  
A hydraulic control system includes a source of pressurized hydraulic fluid for providing a pressurized hydraulic fluid, a main line circuit in fluid communication with the source of pressurized...
8387375 Systems and methods for optimizing thermal efficiency of a compressed air energy storage system  
Systems, methods and devices for optimizing thermal efficiency within a gas compression system are described herein. In some embodiments, a device can include a first hydraulic cylinder, a second...
8387755 Lubrication system and method of control  
A lubrication system is provided that includes a pump operatively connected to one or more supply lines for delivery of a lubricant, the system including a first pressure sensor associated with...
8375711 Compact vacuum material handler  
An improved vacuum material handler having an onboard drive engine powering a vacuum pump and a hydraulic pump. The vacuum material handler also having a frame with integrated forklift lugs.
8336306 Hydraulic fluid cooling system for pair of integrated hydrostatic transmissions  
A hydraulic fluid cooling system for a pair of integrated hydrostatic transmissions includes a common reservoir holding hydraulic fluid and having hydraulic lines connecting the common reservoir...
8272212 Systems and methods for optimizing thermal efficiencey of a compressed air energy storage system  
Systems, methods and devices for optimizing thermal efficiency within a gas compression system are described herein. In some embodiments, a device can include a first hydraulic cylinder, a second...
8235657 Turbojet for aircraft  
A turbojet for an aircraft includes an engine housed in a nacelle and a thermal exchanger that can be traversed by a hot fluid designed to be cooled by thermal exchange with a cold fluid external...
8225607 Vane-cell machine and method for waste heat utilization, using vane-cell machines  
The housing of a vane-type machine has a largely cylindrical space for accommodating the vane cells. A shaft is eccentrically arranged in the housing. First and second guide plates are provided on...
8220257 Axle driving apparatus for a zero turn radius vehicle  
An axle driving apparatus includes a first housing having a plurality of cooling fins, an axle rotatably mounted in the first housing, a hydraulic stepless speed change assembly disposed within...
8220380 Hydraulic unit  
The invention relates to a hydraulic group comprising a reservoir (28) for oil, in which a multiple piston pump (60) is arranged. The individual pumps (61) are cyclically driven by an eccentric...
8215105 Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange  
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a...
8215106 Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange  
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a...
8205444 Hydrostatic pump and motor with improved torque reversal characteristics  
A system and method for variator control employs positively directed electronic make-up and flushing relief valves for more precise torque control of a hydraulic variator, especially during torque...
8201403 Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange  
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a...
8196401 Hydraulic system for controlling a belt-driven conical-pulley transmission  
A hydraulic system for controlling a belt-driven conical-pulley transmission. A pump draws a working medium from a working medium tank or through a cooler return valve from a cooler return line....
8182240 Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange  
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a...
8176734 Hydrostatic transmission having proportional pressure variable displacement pump for loop charge and fan flow supply  
A hydrostatic transmission having a hydraulic pump that is fluidly connected to a hydraulic motor. The transmission also has a pressure control valve that has first and second stages and is...
8146354 Compressed air energy storage system utilizing two-phase flow to facilitate heat exchange  
A compressed-air energy storage system according to embodiments of the present invention comprises a reversible mechanism to compress and expand air, one or more compressed air storage tanks, a...
8136355 Pump control apparatus for hydraulic work machine, pump control method and construction machine  
A pump control apparatus for a hydraulic work machine includes: a rotation speed setting device that sets a target rotation speed for an engine; a rotation speed control device that controls an...
8127541 Working fluid cooling control system for construction machine  
A working fluid cooling control system has a controller 100 that receives inputs signals from a traveling motor speed pickup 101, a pressure sensor 102, a signal receiving line 103a of an option...
8051649 Hydraulically driven industrial machine  
A hydraulically driven industrial machine having a variable displacement type hydraulic pump adapted to take in and pressurized working oil from an working oil tank, a hydraulic actuator to be...

Matches 1 - 50 out of 307 1 2 3 4 5 6 7 >