Patents in subclass Pumps/Alternate Series Or Parallel Operation Of Plural Pumps
Parent class: Pumps
| Number | Patent title | Issue Date |
|---|---|---|
| 07371053 | Two-stage hydraulic pump A two-stage hydraulic pump includes a rotor, a ring, and a plurality of rollers disposed in slots formed on the rotor. The pump has two inlet ports and two outlet ports, which are disposed inwardly and outwardly, respectively, of the... |
05/13/2008 |
| 07231910 | Method for setting the feed rate of a fuel pump unit, which sucks up fuel from a fuel tank, and fuel pump unit for the method The invention relates to a method for setting the feed rate of a fuel pump unit, which sucks up fuel from a fuel tank 8, as a function of the feed pressure, which is built up by the fuel pump unit, in an outlet 25 of the fuel pump unit,... |
06/19/2007 |
| 07226276 | Multi-stage reciprocating vacuum pump and method of operating the same A multi-stage reciprocating vacuum pump includes first (2) and second (4) pump chambers located in the pump housing (1) and in which respective pistons (6, 8) reciprocate, first and second conduits (14, 20) for communicating, respectively... |
06/05/2007 |
| 07008198 | Cam operated pump having lost motion shuttle A peristaltic piston pump driven by a dedicated pump cam disposed on a camshaft of an engine. A plurality of valve-opening cams are disposed along the camshaft. The pump cam has a plurality of lobes equal in number to the number of valve... |
03/07/2006 |
| 06960069 | Arrangement structure of swash plate hydraulic pump hydraulic pump An arrangement structure of a swash plate hydraulic pump which can be used in a wide range of construction equipment and industrial vehicles and is small in size, simple in structure, and inexpensive is provided. For this purpose, an... |
11/01/2005 |
| 06592302 | Pneumatic transmission system and blower unit therefor A blower unit is provided which is suitable for use in a pneumatic transmission system. The blower unit includes a housing having at least two inlet/outlet openings through which air can flow. Disposed within the housing are one or more... |
07/15/2003 |
| 06589023 | Device and method for reducing vacuum pump energy consumption Generally, a vacuum pumping system having efficient power usage is provided. In one embodiment, the vacuum pumping system includes a first pump, a check valve and a second pump. The check valve and second pump are coupled in parallel to... |
07/08/2003 |
| 06561768 | Device for supplying liquids, in particular, fuel A device for supplying liquids, in particular, fuel, has a first geared supply pump (30) with a pair of meshed gear wheels (41, 43) in a pump chamber, of which one is rotatably driven by means of a drive shaft (38). In the pump chamber... |
05/13/2003 |
| 06478551 | Gas compressor having enlarged discharge chamber An air conditioning compressor is equipped with an oil separator for separating high-pressure refrigerant gas and lubrication oil into a gas component and an oil component. The compressor's casing has a barrel portion surrounding an outer... |
11/12/2002 |
| 06240904 | Stand alone multi stage fuel pump A two-stage marine fuel pump (10). A first pump stage (S1) has a fuel inlet (24) and a fuel outlet (26). A second pump stage (S2) has a separate fuel inlet (28) and fuel outlet (30). Each pump stage is stand alone such that while the... |
06/05/2001 |
| 06196806 | Continuously variable transmission Continuously variable transmission having a hydraulically adjustable transmission ratio, includes a hydraulic circuit that interacts with a reservoir, at least two pumps for pumping hydraulic medium from the reservoir to an outflow... |
03/06/2001 |
| 6106245 | Low cost, high pumping rate electrostatically actuated mesopump A mesopump having a plurality of elementary cells. The cells each have a body forming a cavity having an electrode on one curved surface and a second surface facing the electrode. Electrical connections selectively energize the electrode.... |
08/22/2000 |
| 6053702 | Portable water pump having a pressure control circuit with a bypass conduit A booster water pump for increasing source water pressure to a high water pressure for industrial use, has an elongated tubular hollow cylinder having both ends closed with a cylinder inlet port in one end, and a cylinder outlet port to... |
04/25/2000 |
| 6024547 | Power-variable compressor and air conditioner using the same A multi-rotor type compressor including plural compression elements each of which includes a rotor eccentrically rotating in a cylinder and a vane which is in sliding contact with the outer peripheral surface of the rotor and partitions... |
02/15/2000 |
| 5836750 | Electrostatically actuated mesopump having a plurality of elementary cells A mesopump having a plurality of elementary cells and a method of pumping fluids using the mesopump. The cells each have a body forming a cavity having upper and lower electrodes with curved surfaces facing the other electrode. Electrical... |
11/17/1998 |
| 5704768 | Motor pump family of centrifugal pumps A motor pump group has a plurality of centrifugal pumps of the same nominal port diameter including a plurality of impellers having stepwise greater outside diameters for stepwise higher pump heads, and a plurality of respective motors... |
01/06/1998 |
| 5676528 | Motor pump family with single stage and multiple stage impellers A motor pump group has a plurality of centrifugal pumps of the same nominal port diameter including a plurality of impellers having stepwise greater outside diameters for stepwise higher pump heads, and a plurality of respective motors... |
10/14/1997 |
| 5600961 | Refrigeration system with dual cylinder compressor An energy-efficient refrigeration system includes a dual cylinder compressor and a compressor controller coupled to the compressor to control compressor capacity by selection of a predetermined refrigerant flow path through the... |
02/11/1997 |