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| Number | Title | Issue Date |
| 7909589 | Downhole pumps with sand snare A downhole pump has a barrel and a plunger which reciprocate with respect to each other. The plunger has a first portion with a first seal, a second portion and a third portion with a second seal. The second portion is intermediate the first and second portions. A b... | 03/22/2011 |
| 7794215 | High pressure slurry plunger pump with clean fluid valve arrangement A high pressure slurry plunger pump is described which provides a clean fluid buffer around the suction and discharge valves of the pump and in some cases in the vicinity of the plunger seal mechanism in order to displace erosive slurry material and thus extend the ... | 09/14/2010 |
| 7713035 | Cyclonic debris removal device and method for a pumping apparatus A pumping apparatus and method incorporates at least one and preferably as many as four components that are configured to improve debris removal capabilities as compared to prior art apparatuses. The apparatus and method impart cyclonic motion to pumped fluid, in a ... | 05/11/2010 |
| 7686598 | Downhole pumps with sand snare A downhole pump has a barrel and a plunger which reciprocate with respect to each other. The plunger has a first portion with a first seal, a second portion and a third portion with a second seal. The second portion is intermediate the first and second portions. A b... | 03/30/2010 |
| 7428923 | Top plunger adapter There is provided a top plunger adapter assembly for use in controlling sand fouling of an oil pump system wherein the oil pump system reciprocates between upstrokes and downstrokes within a barrel, and wherein the oil pump system includes as components a sucker rod... | 09/30/2008 |
| 7404702 | Debris evacuation apparatus and method for an oil pump A debris evacuation apparatus and method evacuates debris in a pumping system that forms between the plunger exterior and barrel interior. The apparatus has at least one seal and one groove located south of the seal, with the seal blocking northward travel of debris... | 07/29/2008 |
| 7353805 | Fuel injector pump with trapped volume A pumping system (10) for a fuel injection system including a pump body defining a pumping chamber, a plunger (14), a high-pressure outlet, a high-pressure fluid line (18) connecting the pumping chamber to the outlet and a trapped volume (20 | 04/08/2008 |
| 7343967 | Well fluid homogenization device A well fluid homogenization device for use in a pumping system configured to recover fluids from a well includes a central hub and a plurality of posts extending from the central hub. The well fluid homogenization device is configured to rotate with a drive shaft to... | 03/18/2008 |
| 7299772 | Cooling gallery fan assembly for a piston A piston for an internal combustion engine defining an axis of motion and including an annular cooling gallery defined within the piston. The cooling gallery extends annularly about the axis of motion of the piston. A plurality of annularly spaced fan blades is posi... | 11/27/2007 |
| 7118349 | High pressure slurry piston pump A high pressure slurry pump is described which automatically provides a clean fluid buffer around the intake and exhaust valves of the pump and in front of the pump piston in order to displace erosive slurry material and thus extend the life of the pump and improve ... | 10/10/2006 |
| 7008197 | Debris evacuation apparatus and method for an oil pump A debris evacuation apparatus and method evacuates debris in a pumping system that forms between the plunger exterior and barrel interior. The apparatus has at least one seal and one groove located south of the seal, with the seal blocking northward travel of debris... | 03/07/2006 |
| 6962204 | Isolation container for a downhole electric pump An isolation container designed for use with a downhole electric pump assembly commonly used in oil and gas drilling and production operations is disclosed. The isolation container has an annular housing with an axial inlet and outlet bore. A downhole electric pump ... | 11/08/2005 |
| 6830441 | Valve for downhole pump A downhole pump having a barrel with a reciprocating plunger therein has at least one valve. The valve has a cage, a seat and a ball. The cage has a passageway extending between two ends, with the passage including a ball chamber. The ball chamber is between a perfo... | 12/14/2004 |
| 6746222 | Bottom discharge valve A bottom discharge valve is located on the bottom of the pump barrel just above the standing valve. The externally threaded pin end of the standing valve threads into the lower internally threaded portion of the bottom discharge valve. The externally threaded or pin... | 06/08/2004 |
| 6715582 | Suction muffler The invention relates to a suction muffler for a hermetically enclosed compressor, with a housing having a first part with an outlet channel and a second part with an inlet channel, flow conducting means being arranged between the outlet channel and the inlet channe... | 04/06/2004 |
| 6575338 | Fluid dispenser and lens inspection device A fluid dispenser dispenses a fluid alternately from one of a pair of ports (29,31) that are provided on opposite ends of a syringe (26) by moving a piston (42) back and forth inside the syringe. A pair of stirrers (47,48) are provided in the syringe on o... | 06/10/2003 |
| 6481987 | Travelling valve for a pumping apparatus An improved travelling valve has a ball which is positioned on a seal stem, so that the ball is reliably centered when seated on the valve seat, reducing damage to the ball and seat from improper seating and providing increased efficiency for deviated or ... | 11/19/2002 |
| 6290475 | Helical wiper for sucker rod pump A device that can be attached to the plunger of a sucker rod pump to extend the operational life of the pump when it is used for producing oil having a high sand content wipes sand from the wall of the barrel in which the plunger reciprocates and re-route... | 09/18/2001 |
| 6082973 | Liquid ring machine having a rotor with sweeping edges for scraping-off deposits A rotor for a liquid ring machine having a plurality of vanes connected to the rotor hub and a support disk, with the rotor hub face and the support disk back side having sealing surfaces. Recesses with formed edges, capable of scraping off material depos... | 07/04/2000 |
| 6062259 | Method and apparatus for preventing water from stagnating in branches of a municipal water supply system An installation for connection to a water piping system comprising a water main and at least one branch pipe, for preventing a stagnation of water inside that branch pipe. A pumping unit is connected to first and second openings in the far end of the bran... | 05/16/2000 |
| 6010319 | Canned motor pump A canned motor pump has a rotor 130 rotatably provided in the first tube cup 270. The rotor 130 further includes the second tube cup 190 and the cap 170, and the raindropshaped protrusion is provided on each bottom surface of the second tube cup and exter... | 01/04/2000 |
| 5624241 | Flexible hydraulic pump and agitator apparatus An improved towed apparatus for pumping and/or agitating manure slurries is disclosed. The apparatus, which is configured for energization by a tractor's hydraulics and power take-off system, includes an elongate conduit beam member flexible along a cente... | 04/29/1997 |
| 5509791 | Variable delivery pump for molten metal A pump for use in a bath of reactive molten metal such as zinc has a graphite rotor, driven at constant speed, and capable of pumping molten metal at selective rates from the bath. The pump includes an internal delivery flow path and protected drive shaft... | 04/23/1996 |
| 5505591 | Apparatus for processing materials An apparatus for processing materials, such as mixing or homogenizing fluids or dispersing a fluid in a viscous material, comprises a housing having bores and at least one inlet port and an outlet port disposed in the housing and in fluid communication wi... | 04/09/1996 |
| 5433587 | Paint circulating method with viscosity indicator and paint agitating means A paint circulation system for supplying paint to a plurality of distributors utilizing a circulating pump to circulate paint to the distributors and an injection pump operated by a closely controlled electric motor for injecting paint into the circulatio... | 07/18/1995 |
| 5421490 | Pasty media dispenser with conveyor means on cover Disclosed is a pump device for pastry or paste-like media. The medium is located in a container and within the container a cover is lowered under the influence of a pressure device. The cover has on its underside, inclined surfaces which are inclined in t... | 06/06/1995 |
| 5340289 | Apparatus for electrostatically isolating and pumping conductive coating materials An apparatus for transferring electrically conductive coating materials such as water-based paint from a source to an electrostatically charged dispenser includes first and second shuttle devices and two large reservoir, piston pumps each having structure... | 08/23/1994 |
| 5273407 | Homogenizing system having improved fluid flow path A homogenizer comprises a homogenizing valve mounted to a pump block. The pump has multiple plungers housed in a set of pump chambers formed through a surface of the pump block. Sets of suction valves and discharge valves are positioned in valve bores for... | 12/28/1993 |
| 5221194 | Apparatus for electrostatically isolating and pumping conductive coating materials An apparatus for transferring electrically conductive coating materials such as water-based paint from a source to an electrostatically charged dispenser includes first and second shuttle devices and two large reservoir, piston pumps each having structure... | 06/22/1993 |
| 5145339 | Pulseless piston pump A multiple piston cylinder reciprocating pump is provided with a cam drive such that the sum of the velocities during the pumping strokes of all of the cylinders is generally constant. The leak free design is provided by utilizing a diaphragm attached to ... | 09/08/1992 |
| 5141414 | Piston pump for easily damaged products An improved pumping device for delicate or easily damaged products is provided with a hopper, or other system for holding the products, and at least one, and preferably two, synchronized piston pumps positioned proximate to the bottom of the hopper. The p... | 08/25/1992 |
| 5141411 | Center-anchored, rod actuated pump A fluid pump which is particularly useful in relatively deep and/or low pressure stripper wells. Stripper wells tend to produce sporadically and/or occasionally produce gas, and are often very sandy, have a tendency to become gas locked, and are susceptib... | 08/25/1992 |
| 5122038 | High density grout pump A pump capable of shear mixing and supplying high density grout over long distances and through relatively narrow conduits. The pump includes a hopper, a series of agitators in the hopper and a coincident auger and rotor/stator disposed below the hopper. ... | 06/16/1992 |
| 4948342 | Method and device for automatic circulation in a waste water pump station The pressure side of the pump unit is provided with a valve (6) which during certain periods opens a connection between the pump and the pump station to obtain circulation in the station. The valve (6) is opened and closed by a valve ball (9) which is con... | 08/14/1990 |
| 4925375 | Device for automatic circulation in a waste water pump station A device is provided for obtaining automatic circulation in waste water pump stations. At the pressure side of the pump unit, there is a valve which opens during certain times to form a connection between the pump and the pump station to create a circulat... | 05/15/1990 |
| 4830584 | Pump or compressor unit A pump or compressor unit (1) suited particularly for mixed phase fluids, e.g. mixed gas and oil, has a multistage axial flow compressor device with contra-rotating vanes. An upstream mixer device (10) and a downstream centrifugal impeller device (32) can... | 05/16/1989 |
| 4824021 | Window washing system for motor vehicles A windshield washing installation for a motor vehicle includes a reservoir tank for the washing liquid and a feed pump, especially a vane-type pump. A suction pipe of the feed pump is inserted into the reservoir tank under interposition of a sealing membe... | 04/25/1989 |
| 4819764 | Fully automatic single-person operated grease injection device The structure of the present invention "a fully automatic single-person operated grease gun injection device" comprises of an exterior case body, a generating device system, a compressed grease pump, a grease scratching/collecting harrow control connectin... | 04/11/1989 |
| 4797067 | Pumping system with desilting arrangement Pumping system with a desilting arrangement having a bidirectional water pump disposed in a housing which has a pump inlet and a pump outlet. The system also has a silt blow-out pipe with a desilting valve therein, connected at one end to the pump outlet ... | 01/10/1989 |
| 4685868 | Vacuum jet apparatus A hydraulically-driven, vacuum jet apparatus is capable of drawing a liquid and solid mixture from a holding receptacle or container and of blending the mixture to provide a uniformly distributed liquid and solid solution. An intake assembly positioned on... | 08/11/1987 |
