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| Number | Title | Issue Date |
| 7270098 | Vehicle heater and controls therefor A heater for a liquid has a combustion chamber, a jacket for the liquid extending about the combustion chamber and a burner head assembly connected to the combustion chamber. The burner head assembly includes a housing having a burner mounted thereon and a hollow in... | 09/18/2007 |
| 7165950 | Two-stage pressure relief valve A two-stage pressure relief valve for use with hydraulic systems is disclosed. The two-stage pressure relief valve has a first stage that relieves increases in hydraulic system pressure over the normal operating pressure and up to a selected threshold pressure level... | 01/23/2007 |
| 7101155 | Vacuum pumping system and method of controlling the same A vacuum pump system (10; 36; 46) for pumping gas from an enclosure (12) comprises: a vacuum pump unit (14) having a pump inlet (16) connectable with an outlet (18) of such an enclosure and a pump outlet (20) for exhausting ... | 09/05/2006 |
| 7074013 | Dual volume-ratio scroll machine The present invention provides the art with a scroll machine which has a plurality of built-in volume ratios along with their respective design pressure ratios. The incorporation of more than one built-in volume ratio allows a single compressor to be optimized for m... | 07/11/2006 |
| 7017340 | Hydrokinetic torque converter for an automatic vehicle transmission A hydrokinetic torque converter assembly for use with a geared transmission in a vehicle powertrain. The transmission includes a gear pump with a pump driving member and the torque converter assembly includes an impeller shaft drivably engageable with the pump drivi... | 03/28/2006 |
| 6963802 | Method of coordinating and stabilizing the delivery of wind generated energy The invention relates to a method of coordinating and stabilizing the delivery of wind generated power, such as to a power grid, so as to avoid sudden surges and spikes, despite wind speed fluctuations and oscillations. The method preferably uses a plurality of wind... | 11/08/2005 |
| 6962485 | Constant bypass flow controller for a variable displacement pump A fuel metering unit for controlling a variable displacement pump including a main metering valve in fluid communication with the pump for metering an output of the pump, a pressure regulator in fluid communication with the metering valve to create a spill return an... | 11/08/2005 |
| 6682316 | Dispensing system for petrol-pumps, including a bypass and principle valve A dispensing system for petrol pumps, comprising a pump, a dispensing valve in a petrol pump nozzle and an electrically controllable solenoid valve (10), characterized in that the solenoid valve (10) includes a directly acting principal valve (18) and a b... | 01/27/2004 |
| 6641372 | Dual discharge hydraulic pump and system therefor A hydraulic pump includes a housing, a primary discharge outlet, an auxiliary discharge outlet, and a flow control valve for controlling fluid flow from the primary and auxiliary discharge outlets. A first fluid passageway within the housing passes fluid ... | 11/04/2003 |
| 6497557 | Sliding vane pump A sliding vane pump comprising a rotor housing having a pumping chamber, a rotor in the pumping chamber having a plurality of radially disposed slots, and a plurality of sliding vanes disposed in the slots configured to extend to follow an inner wall of s... | 12/24/2002 |
| 6428285 | Hydraulic delivery device The invention relates to a hydraulic delivery device with a displacement unit which delivers a medium from a suction connection under output pressure to a pressure connection, connectable with a consumer, and under consumer pressure, and a regulating devi... | 08/06/2002 |
| 6379132 | Fuel pump A fuel pump comprising a pumping plunger reciprocable within a bore, and a drive arrangement for driving the pumping plunger. The drive arrangement includes a compressible load transmission arrangement for transmitting movement of the drive arrangement to... | 04/30/2002 |
| 6276154 | Two step metering device A two-step metering device for controlling the flow of an operating fluid to a variable capacity compressor is provided. The metering device includes a valve that defines a fluid flow path having a large orifice configured to allow a flow rate correspondi... | 08/21/2001 |
| 6250894 | Load sharing valve and system for operating centrifugal pumps in parallel A system allows pumps to run in parallel and preventing back flow through a non-operational pump. The system includes a first pump in parallel with a second pump. The system further includes a check valve in fluid communication with the first pump for pre... | 06/26/2001 |
| 6179581 | Pump connection to drive shaft A pump having a pump housing with a rotor in it, particularly a vane pump. The pump housing having a centering aid in the form of a sleeve that extends toward a drive shaft. The shaft has a smaller diameter than the bore through the sleeve. The shaft has ... | 01/30/2001 |
| 6089831 | Compressed air supply system for vehicle compressed air installation and process for controlling said system An air compressor, from whose outlet a supply line leads to an air drier for the purpose of supplying the compressed air system. On the outlet side of the air drier, the supply line branches into a plurality of line branches that lead to at least two cons... | 07/18/2000 |
| 6086337 | Variable capacity pump An oil pump effects a pumping action to deliver oil from an inlet port to a first outlet port and also to a second outlet port. An oil supply passage is connected to the second outlet port. A regulator valve has a bore, a spool disposed in the bore, a pre... | 07/11/2000 |
| 6050779 | Conveying apparatus using unstable electric power supply A conveying system comprising a pump whose power source is an unstable electric power supply, such as a solar cell; a first supply pipe for conveying liquid from an intake to the pump; a second supply pipe for conveying the liquid from the pump to a disch... | 04/18/2000 |
| 6033190 | Flat faced bearing housing engaging flat faced pump rotor housing In a vane cell pump for pumping a pressure fluid from a container to a consumer, all the essential components and functional characteristics are accommodated in a bearing housing (10). The components include a suction connection (13) for connecting to the... | 03/07/2000 |
| 5984644 | Dual output window washer pump for an automotive vehicle A dual outlet washer pump for an automotive vehicle to alternately supply a stream of washer fluid to separate locations has a valve element with a frame portion surrounding a flat, flexible membrane mounted in vertically plainer fashion in a discharge se... | 11/16/1999 |
| 5975232 | Power assisted steering apparatus for automotive vehicle A power assisted steering apparatus for a vehicle has a driving source and an actuator for the vehicle's steering mechanism, to power assist the steering operation. The driving source, such as an engine, continuously drives a pump. A working passage is ar... | 11/02/1999 |
| 5857840 | Vacuum pump with a centrifugal dust collector and a metal mesh dust collector mounted in parallel The objects of the present invention are to remove the dust in a closed container, to keep the pressure in the closed container within a predetermined range, and to shorten the maintenance time of a vacuum pump system. The present invention provides a cen... | 01/12/1999 |
| 5797732 | Variable capacity pump having a pressure responsive relief valve arrangement An oil pump effects a pumping action to deliver oil from an inlet port to a first outlet port and also to a second outlet port. An oil supply passage is connected to the second outlet port. A regulator value has a bore, a spool disposed in the bore, a pre... | 08/25/1998 |
| 5669761 | Discharge control apparatus of hydraulic pump for automatic transmission In an automatic transmission, the amount of transmission fluid discharged is controlled by a flow control valve. A fixed displacement type pump is connected with a bypass passage through which a part of fluid discharged from a discharge port of the pump f... | 09/23/1997 |
| 5527161 | Filtering and dispensing system A liquid pumping and filtering system for use in dispensing materials such as photoresist used to make semiconductors. A positive displacement diaphragm pump is used to draw source liquid from a source bottle. A pump valve is activated to direct fluid fro... | 06/18/1996 |
| 5226802 | Variable-displacement vane pump A variable-displacement vane pump apparatus is composed of a pump part and a switching valve. The pump part is comprised of a housing, a cam ring, a rotor, plural vanes, side plates, two pairs of intake and exhaust ports formed on the side plates, dischar... | 07/13/1993 |
| 5187936 | Continuous flow fuel circulation system An improved augmentor fuel supply system including a fuel source, a pump for pressurizing the fuel, a flow control means for controlling the flow and pressure of fuel to a fuel disbursement means (e.g., an augmentor) and a return path for recirculating un... | 02/23/1993 |
| 5018948 | Rotary displacement compressor with adjustable outlet port edge The invention relates to a rotary displacement compressor having volume ratio regulation. A connection channel (8,9,10) connects the working space of the compressor to the pressure channel (5). In the channel (8,9,10) there is provided means (13) for sens... | 05/28/1991 |
| 5017098 | Power transmission A split-discharge balanced dual-lobe vane-type rotary hydraulic machine that comprises a housing, a rotor mounted within the housing and having a plurality of radially extending peripheral slots, and a plurality of vanes individually slidably mounted in t... | 05/21/1991 |
| 4923373 | Hydraulic single piston pump for manual operation A hydraulic single piston pump for manual operation has a piston (3) with a first channel (14, 20) running from piston chamber (7) to the rod chamber (5). The first channel has a check valve (15-19) opening in the return stroke. The piston (3) also has at... | 05/08/1990 |
| 4838767 | Balanced vane type oil pumps Inlet passages and two sets of discharge passages are communicated with a pair of pump chambrs formed in a pump cartridge in a pump body. A pair of spool valves respectively acting as a flow quantity control valve and a pressure sensitive type flow path s... | 06/13/1989 |
| 4797962 | Closed loop feedback air supply for air support beds A closed loop feedback-controlled air supply system for air support convalescent beds having groups of air sacs for supporting various body sections of a patient. The air supply system may be self-contained with its own air supply compressor or it may uti... | 01/17/1989 |
| 4792288 | Encapsulated compressor The invention relates to a compressor (2) which is encapsulated in a housing (4) and which can be rotated about the axis (16) of its crankshaft (8) while maintaining the oil lubrication of the moving parts of the compressor. The interior (14) of the housi... | 12/20/1988 |
| 4729721 | Valve arrangement with at least two diaphragms The invention relates to an oil pump unit for a nozzle burner that includes a diaphragm type valve assembly located between a pump housing and a cover removably mounted by the pump housing. The valve assembly includes two or more diaphragm regulating valv... | 03/08/1988 |
| 4715792 | Variable capacity vane type compressor A variable capacity vane type compressor has an unloading mechanism operative to relieve a part of compressed fluid from a working chamber when in its compression stroke and an additional mechanism for controlling the suction of fluid into the compressor.... | 12/29/1987 |
| 4662825 | Hydraulic pump A supply pump for continuously supplying pressurized fuel to an accumulator-type injector system employs an electrically controlled metering valve for regulating the supply of fuel to the pump chamber. The output pressure of the pressurized fuel from the ... | 05/05/1987 |
| 4642033 | Positive displacement air compressors A rotary positive displacement air compressor includes a stator containing a rotor and having an inlet and an outlet. The inlet includes two or more inlet apertures in parallel associated with independently actuable pistons. Detecting means detects the pr... | 02/10/1987 |
| 4599051 | Vane type rotary pump A vane type rotary pump comprises a cam ring mounted within a stator housing and having an inner peripheral wall defining four circumferentially equi-spaced semicylindrical inner cam surfaces, a pair of end wall structures fitted to opposite ends of the c... | 07/08/1986 |
| 4543789 | Multiple displacement hydraulic pump system with automatic displacement control for brake boosters and the like A pump system is disclosed for delivering hydraulic fluid to a load device, such as a hydraulic brake system. The system automatically switches from larger displacement to smaller displacement as pressure at the outlet increases. The pump system comprises... | 10/01/1985 |
| 4507054 | Liquid dispensing system A liquid dispensing system comprising a collapsible container, a dispensing head, a conduit leading from the container to the dispensing head and a pump for pumping liquid from the container through the conduit to the dispensing head. A vacuum switch is r... | 03/26/1985 |
