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| Number | Title | Issue Date |
| 7891956 | Rotary compressor A rotary compressor includes a driving shaft having an eccentric portion, a cylinder, and a roller installed on an outer circumference of the eccentric portion to contact an inner circumference of the cylinder, performing a rolling motion along the inner circumferen... | 02/22/2011 |
| 7070379 | Semiconductor fabrication apparatus having FOUP index in apparatus installation area A semiconductor fabrication apparatus, located in an apparatus installation area, includes a front-opening unified pod (FOUP) index, a plate, a first transfer device, a second transfer device, and an engineering FOUP index and multiple processing chambers. The FOUP ... | 07/04/2006 |
| 6702067 | Piston compressor, particularly hermetically enclosed refrigerant compressor The invention relates to a piston compressor, particularly a hermetically enclosed refrigerant compressor, with a crankshaft, which is axially supported in an axial bearing in relation to a bearing housing, and with an oil pump arrangement. In a piston co... | 03/09/2004 |
| 6186331 | Container A container for receiving a detesting dust article and transporting thereof, which is mounted on a loader disposed in a border portion between a high cleanliness room and a low cleanliness room, including means by the use of which a cover thereof is opene... | 02/13/2001 |
| 6158973 | Multi-stage manual hydraulic pump A multi-stage manual hydraulic pump comprising a plurality of cylinders in tandem. A block holds each cylinder assembly. One or more cylinders are the high volume stage, one or more cylinders are the medium volume stage and the final cylinders are the low... | 12/12/2000 |
| 5894825 | Engine lubrication system The present invention relates to a supplementary lubrication system for an internal combustion engine operable to lubricate the engine and an accessory prior to engine start-up and to lubricate the accessory after engine shut-down. The supplementary lubri... | 04/20/1999 |
| 5141402 | Power transmission An electric-motor hydraulic pump includes a housing having a stationary internal shaft. A pair of cylinder blocks are rotatably carried by the shaft within the housing, and an array of pistons are slidably disposed with each cylinder block. A yoke plate i... | 08/25/1992 |
| 5049799 | High performance controller for variable displacement hydraulic motors In a control (100) for a variable displacement hydraulic motor (12) having an electrically controlled hydraulic servo valve (14) for controlling the displacement of a hydraulic motor by varying position of a wobbler (28) in response to a servo valve contr... | 09/17/1991 |
| 4815289 | Variable pressure control A variable pressure control for controlling displacement of a variable displacement over-center pump utilizes a pair of remotely variable pressure limiter three-way valves which are associated one with each of a pair of servo cylinders operably connected ... | 03/28/1989 |
| 4750866 | Control device for a pump with adjustable flow The invention relates to a pump assembly having a pump with reversible and adjustable controls, the pump controls having a neutral nonflow position and varying positions in opposite directions for effecting corresponding varying rates of flow in the oppos... | 06/14/1988 |
| 4617797 | Multi-function valve A multi-function valve usable in a hydrostatic transmission and having valve components mounted in a single valve body to provide pressure limiter and high pressure relief functions and with the structure also providing a bypass function and for supply of... | 10/21/1986 |
| 4559778 | Control device for a hydrostatic transmission An apparatus for use in controlling a variable displacement pump in a hydrostatic transmission comprises servo-positioning means for varying the displacement of the variable displacement pump, signal producing means for producing a first signal dependent ... | 12/24/1985 |
| 4518319 | Variable displacement pump system A variable displacement pump has a swashplate controlled by a pair of pistons. A shuttle valve communicates the highest pressure pump workport to an operator-controlled displacement control valve. A pressure-responsive override valve is connected in serie... | 05/21/1985 |
| 4518320 | Variable displacement pump system A variable displacement pump has a swashplate controlled by a pair of pistons. A shuttle valve communicates the highest pressure pump workport to an operator-controlled displacement control valve. A pressure-responsive override valve is connected in serie... | 05/21/1985 |
| 4510750 | Circuit pressure control system for hydrostatic power transmission A circuit pressure control system for a hydrostatic power transmission having a variable-displacement hydraulic pump driven by a prime mover, a hydraulic actuator for actuating a load and a displacement adjusting mechanism for the hydraulic pump. The hydr... | 04/16/1985 |
| 4496289 | Device for controlling and/or measuring operational parameters of an axial piston machine Disclosed is a device for controlling or measuring operational parameters of an axial piston machine. The tilting plate which engages and adjusts the stroke of the piston is provided with two opposite pivot pins supported in fixed bearings. At least one p... | 01/29/1985 |
| 4489552 | Automatic neutral point detecting system for hydraulic pump An automatic neutral point detecting system for a hydraulic pump equipped with a displacement varying device capable of shifting both in a (+) direction and in a (-) direction and connected to at least one hydraulic actuator to form a hydraulic circuit to... | 12/25/1984 |
| 4489551 | Failure detection system for hydraulic pump A failure detection system for a hydraulic pump (1) having a displacement volume varying device (1a) and connected to at least one hydraulic actuator (4) to constitute a hydraulic circuit for driving the hydraulic actuator. The system includes means (7a, ... | 12/25/1984 |
| 4487109 | Electro-hydraulic control system for a power drive unit The invention relates to an electro-hydraulic control system for a power drive unit having a wobbler controlled variable displacement hydraulic motor wherein the electro-hydraulic control system causes the displacement of the hydraulic motor to match a lo... | 12/11/1984 |
| 4480963 | Pump swashplate control assist A hydrostatic drive system includes a hydraulic motor driven by a variable displacement axial piston pump with alternative intake and output ports. A charge pump generates a charge pressure which is communicated only to the pump intake port via a charge v... | 11/06/1984 |
| 4455124 | Automatic pressure setting adjustment for a pressure compensated pump A pressure compensated pump which supplies fluid to a common header has an automatic pressure compensator adjustment mechanism which adjusts the pressure setting of the pressure compensator in response to changes in the displacement of the pump, such that... | 06/19/1984 |
| 4432703 | Adjusting arrangement for a hydraulic pump with variable discharge flow quantity An adjusting arrangement for a hydraulic pump with a variable flow quantity, having an operating cylinder located in a neutral position through the intermediary of a positively-acting resetting device, the piston of which is adjustable dependent upon the ... | 02/21/1984 |
| 4381702 | Displacement control for a hydraulic pump or motor with failure override A displacement control for a pump or motor having a swash plate for setting displacement includes a control device operatively connected to the swash plate and a control valve having connections to a source of pressure and drain for operating said control... | 05/03/1983 |
| 4364230 | Hydrostatic transmission overspeed prevention circuit A hydraulic circuit is provided to prevent overspeeding the prime mover powering a hydrostatic transmission. The hydrostatic transmission includes a hydraulic motor fluidly coupled to a hydraulic pump. The hydraulic pump is driven by the prime mover and t... | 12/21/1982 |
| 4336003 | Crane swing control A control for a variable displacement pressure compensated pump in which pressurized control fluid regulates the setting of a sequence valve to set the maximum output pressure of the pump and also set the displacement of the pump. The sequence valve is a ... | 06/22/1982 |
| 4237774 | Displacement control valving for a radial piston device A radial piston device such as a radial piston motor (10) has a rotor assembly (34) rotatably positioned within a cylindrical race (43) which is movable to a first displacement position by a first piston (52) and a second displacement position by a second... | 12/09/1980 |
| 4212164 | Variable delivery pump control system A variable delivery pump has a pump control mechanism in a housing secured thereto for governing directional flow of fluid through the pump, the pump being adapted to be connected through a closed loop to a motor. A pressure compensating valve is provided... | 07/15/1980 |
| 4191094 | Power drive unit A power drive unit for operation of structure in opposite directions, such as aircraft structure and, particularly, thrust reverser structure of an aircraft engine operable between stow and deploy positions, including, a bi-directional hydraulic motor hav... | 03/04/1980 |
| 4188787 | Hydraulic control apparatus Disclosed are methods and apparatus for controlling the flow of hydraulic fluid to and from a work cylinder. The disclosed system includes a reversible variable displacement pump interconnected between a work cylinder and a selector valve which may connec... | 02/19/1980 |
| 4117678 | Self-contained hydraulic switch operator Self-contained simplified power apparatus for operating electric transmission line switches locally or remotely includes a rotary hydraulic actuator arranged for mechanical coupling to the line switch, a battery-powered reversible low voltage motor operat... | 10/03/1978 |
| 4076459 | Horsepower limiter control for a variable displacement pump A horsepower limiter control for an axial piston pump provides a simple adjustment for setting the maximum horsepower the pump can provide and automatically adjusts the product of working pressure and maximum pump displacement to maintain the set horsepow... | 02/28/1978 |
| 4028010 | Reversible, variable-displacement piston pump with positioner means for automatic return to zero displacement A variable displacement pump having a tiltable swash plate including a pair of servo mechanisms for controlling discharge of pump fluid includes a zero displacement positioner for automatically returning the pump swash plate to a central, neutral position... | 06/07/1977 |
