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| Number | Title | Issue Date |
| 7997881 | Combined prime valve and electrical pressure control for paint spray pumps A combined prime valve and electrical pressure control apparatus including a prime valve actuator, an electrical pressure control actuator, and a control housing containing the actuators, with each coupled to a single shaft having a cam assembly for selectively actu... | 08/16/2011 |
| 7410348 | Multi-speed compressor/pump apparatus A pumping/compressing apparatus for use in a fluid handling system transferring a fluid from one location, e.g., a tank, to another location or to an end use is provided. The apparatus basically includes a motor and a multistage, e.g., two stage, device including at... | 08/12/2008 |
| 7329105 | Multi-directional pump A multi-directional pump is disclosed generally comprising a housing with inlet and outlet ports, a pumping device disposed therein, a first chamber in fluid communication with the inlet port, and a second chamber in fluid communication with the first chamber. The f... | 02/12/2008 |
| 7275592 | Oil well pump apparatus An oil well pumping apparatus for pumping oil from a well to a wellhead provides a tool body that is sized and shaped to be lowered into the production tubing string of the oil well. A working fluid is provided that can be pumped into the production tubing. A prime ... | 10/02/2007 |
| 7223080 | Double-acting, high pressure cryogenic pump A double-acting, reciprocating piston, high discharge pressure, cryogenic fluid pump having a unique blow-by venting system. In two different embodiments, a double-acting piston has two pair of piston heads and two sets of seals. In a first embodiment, a blow-by ven... | 05/29/2007 |
| 7217085 | Fuel pump of low fuel intake resistance A fuel pump to be disposed in a fuel tank to supply pressurized fuel to an internal combustion engine includes a motor section, a pump section including an impeller driven by the motor section and a cylindrical pump housing having a pump passage extending along the ... | 05/15/2007 |
| 7097435 | Device for draining and recharging a hermetic compressor with oil A method of draining and recharging a hermetic compressor with oil using a drainage assembly mounted in the compressor housing. The assembly includes a tube having a valve mounted at one end thereof with the second end of the tube located in the oil sump of the hous... | 08/29/2006 |
| 7074014 | Dipping type pump where discharging performance at a time of actuation has been improved In a dipping type pump where a rotary shaft extending from a motor into a pump casing disposed in liquid is mounted with impellers, and liquid is sucked from a sucking port at a lower portion of the casing and discharged from a discharge port by rotational driving o... | 07/11/2006 |
| 7029248 | Device for venting a pump unit A pump unit for the metered delivery of fuel to internal combustion engines. The pump unit comprises a housing which comprises a longitudinal bore. Located in the longitudinal bore is an overflow valve, via which fuel flows back through a channel into a fuel tank. T... | 04/18/2006 |
| 7011505 | Pump system with vacuum source A self priming pump system that includes a motor coupled to a centrifugal pump for driving the centrifugal pump. A separator having a reservoir is provided for storing a limited amount of pumped fluid in advance of the centrifugal pump. A vacuum source provides a va... | 03/14/2006 |
| 6984113 | Oil pressure operated pump for marine steering gears with a valve set shell with valves separately capable of assembly with the valve housing An oil pressure operated pump for marine steering gears includes a multiple piston oil pressure operated pump controlled by a steering wheel, a valve housing mounted under the pump, a bottom cover closing the valve, the valve housing and the cover each including cha... | 01/10/2006 |
| 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 |
| 6846166 | Reciprocating diaphragm pump with degassing valves In a reciprocating pump, drive power of a drive-power supply member is transmitted to a diaphragm within a diaphragm drive chamber via operating fluid. An operating-fluid-flow regulation chamber for regulating the flow of operating fluid is located between the drive... | 01/25/2005 |
| 6837692 | Self-priming centrifugal pump with internal series of diffusers and impellers and laminar valve A centrifugal pump with facilitated self-priming, which comprises a casing with a suction inlet and a discharge outlet and with an internal series of diffusers and impellers, which form a cylindrical assembly that forms, together with the casing, an annular interspa... | 01/04/2005 |
| 6823686 | Pressure equalization system and method A pressure equalization method and system is provided for starting a compressor while maintaining the condenser at a high pressure and includes a valve and a bleed port. The compressor has a compressor inlet for receiving a fluid at a first pressure and a compressor... | 11/30/2004 |
| 6779608 | Surface pump assembly A surface pump assembly having a pressure vessel containing a submersible pump and an industrial motor located at least partially external to the pressure vessel having a shaft or seal thrust chamber extending at least partially into the pressure vessel to connect t... | 08/24/2004 |
| 6726458 | High pressure pump with filler plug A high-pressure pump for pumping fuel, and includes a main unit for pumping the fuel, which unit is actuated by a secondary unit for pumping a working liquid. The secondary unit has a filling neck for filling a reservoir with working liquid. The filling neck is conn... | 04/27/2004 |
| 6691730 | Inflatable pad with a built-in pump The invention is an inflatable pad with a built-in pump, including an inflation unit with a laminated fringed chamber and an interior air pump assembly with an inflation and deflation channel. The pump chamber has two pieces of unidirectional membrane tub... | 02/17/2004 |
| 6595758 | Method for conveying damp gases by means of a conveyor device and a conveyor device for carrying out said method The invention relates to a process for conveying damp gases by means of a conveyor device (1) and also relates to a conveyor device (1) for carrying out the process. The conveyor device (1) has at least one feed pump (2) with an oscillating reciprocating ... | 07/22/2003 |
| 6584791 | Pressure equalization system and method A pressure equalization method and system is provided for starting a compressor while maintaining the compressor at a high pressure and comprises a valve and a bleed port. The compressor has a compressor inlet for receiving a fluid at a first pressure and... | 07/01/2003 |
| 6398508 | Control switch assembly for an air pump A control switch assembly for an air pump has a unidirectional valve mounted inside a port that is mounted together with a contact device on an actuation device. The actuation device has an extension slidably received in the actuation device and controlla... | 06/04/2002 |
| 6254363 | Liquid colorant tube assembly A liquid colorant system for a plastic molding machine includes a plurality of interconnected tube structures, a tank containing the liquid colorant, and a peristaltic pump. The pump drives a flow of the liquid colorant from the tank to a valve through a ... | 07/03/2001 |
| 6238191 | Apparatus for supplying a fuel by means of a fuel supply unit arranged in a housing The apparatus for supplying fuel includes a fuel tank and a fuel feed unit in the fuel tank. The fuel feed unit has a main housing, a suction cover arranged in a bottom part of the main housing, a fuel pump and a degassing valve arranged in the suction co... | 05/29/2001 |
| 6234168 | Dosimeter An apparatus for measuring doses of dispensed products includes a first metering ring (20) mounted to rotate 5 around a rotation axis (1), and drive means (10) that drives the first metering ring to rotate around an axis (1). The drive means (10) is actua... | 05/22/2001 |
| 6187179 | Outside filter, in particular for aquarium An outside filter for an aquarium has a housing having an inner chamber, a removable cover for closing the inner chamber of the housing, a supply conduit for supplying water to be filtered into the inner chamber of the housing, a withdrawal conduit for wi... | 02/13/2001 |
| 6186746 | Fuel delivery pump for a fuel injection pump for internal combustion engines A fuel delivery pump for a fuel injection pump for internal combustion engines, including a pair of gears that mesh with each other and are driven to rotate in a pump chamber. The pair of gears deliver fuel from an intake chamber connected to a storage ta... | 02/13/2001 |
| 6129523 | Air purging circulator An air purging circulator is provided with a reservoir on the suction side of an impeller chamber in a circulation pump, to allow circulating water to reduce its velocity, and remove air from the lowest pressure point in the system, the suction side of th... | 10/10/2000 |
| 6012904 | Vented fuel module reservoir with two-stage pump A main fuel tank in an automotive vehicle contains a reservoir in which is located a two-stage electrically operated pump. The first stage is a rotary side lateral pump which draws fuel from the main tank and delivers it to the reservoir. The second stage... | 01/11/2000 |
| 6003167 | Apparatus for eliminating gas from a fluid piping system A gas release apparatus for use with centrifugal pumps, and particularly for centrifugal pumps when used in conjunction with a fluid piping system such as hydrotherapy tubs, spas, and whirlpools.... | 12/21/1999 |
| 5983922 | Instantaneous hot-water delivery system In a hot and cold water distribution system wherein the hot water is delivered from a water heater to a distant hot water tap adjacent to a cold water tap, a hot water recirculation pump assembly purges the hot water line of any cooled-down water in order... | 11/16/1999 |
| 5873709 | Device for producing compressed air for various uses The device of the current invention produces volumes of compressed air by utilizing a turbocharger, a compact combustion assembly, and a hydraulic power pack. The turbocharger includes a turbine and centrifugal compressor, each being interconnected using ... | 02/23/1999 |
| 5868550 | Pump assembly A pump assembly, comprising a pump with a chamber having a vacuum region therein, a priming fluid reservoir, a suction line for fluid communication between the vacuum region and a fluid source, and a priming suction line for fluid communication between th... | 02/09/1999 |
| 5846063 | Miniature universal pump and valve for inflatable liners There is disclosed a preform for an air pump and relief valve assembly which has an assembly body with a substantially flat bottom and molded entirely of a flexible plastic to form a bulbous extremity on one end of the body and open at its bottom and a re... | 12/08/1998 |
| 5823169 | Aggregate for feeding fuel from supply tank to internal combustion engine An aggregate for feeding fuel from a fuel supply tank to an internal combustion engine, the aggregate has a housing through which fuel flows, a feeding pump and a motor which drives the pump, the feeding pump and the motor being arranged in the housing so... | 10/20/1998 |
| 5809866 | Method and apparatus for venting air from the crank case of a compressor A downwardly opening compartment is disposed within a crank case. An upwardly disposed hole places the compartment in fluid communication with the environment. As blowby mist in the crank case travels upward through the compartment, the mist tends to sepa... | 09/22/1998 |
| 5713723 | Volumetric hand pump A volumetric hand pump having a transparent pump chamber and a fixed full stroke volume. The transparent pump chamber allows visual observation of the amount of fluid being pumped when less than the fixed full stroke volume is used. The transparent pump c... | 02/03/1998 |
| 5660533 | Vacuum assisted priming and cooling system for a pump A vacuum assisted pump priming system which includes a vacuum chamber communicating with a pump inlet via a transfer passage. A valve assembly within the vacuum chamber controls the communication of a vacuum source with the chamber. The valve assembly inc... | 08/26/1997 |
| 5655892 | Thermally actuated fuel pump vapor vent valve A thermally actuated vapor vent valve in a fuel pump module allows hot vapor to escape from the fuel pump module when the module is at a temperature significantly above normal operating temperatures. The vent valve is carried by a retainer in the fuel pum... | 08/12/1997 |
| 5593288 | Liquefied gas pump A liquefied gas pump includes a piston and a cylinder which form a pump chamber into which a liquefied gas entrance path and a liquefied gas discharge path open. Relative upward and downward motion between the piston and cylinder provides a repetition of ... | 01/14/1997 |
| 5540569 | Multiple-chamber gear pump for ink jet printing Pump heads comprising at least two gear-pump chambers are disclosed. Each chamber comprises a housing which defines a corresponding pump cavity. Each cavity contains a driving gear and at least one driven gear and has a separate inlet and outlet. The pump... | 07/30/1996 |
