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| Number | Title | Issue Date |
| 8087911 | Pump of electronically controlled brake system A pump of an electronically controlled brake system. The pump includes a bore formed in a modulator block and connected with a suction port and a discharge port, a piston installed in the bore in a reciprocating movable manner and defining an inlet path therein, an ... | 01/03/2012 |
| 7993115 | Pump of electronically controlled brake system A pump including a bore formed in a modulator block and connected with a suction port and a discharge port is provided. The pump includes a piston installed in the bore in a reciprocating movable manner and defining an inlet path therein, an inlet valve to open or c... | 08/09/2011 |
| 7748967 | Linear compressor Disclosed herein is a linear compressor in which a piston reciprocally moves in a cylinder upon receiving a reciprocating drive force of a linear motor to compress working-fluid, for example, refrigerant, received in the cylinder. The linear compressor comprises the... | 07/06/2010 |
| 7621727 | Automobile compressor piston A piston used in a vehicle air-compressor or a vehicle suspension system can be dismantled by a dismantling tool so that cost for a repair is reduced while components are replaceable instead of the whole piston. ... | 11/24/2009 |
| 7491040 | Compact compressor A compact compressor including one or more heads. Each of the compressor heads is configured with at least one of the intake and output valves incorporated into the piston head. The compact compressor also has a cylinder with a reduced mass, increased surface area, ... | 02/17/2009 |
| 7381035 | Piston pump with check shaft A pump for use with a dispensing unit of a liquid hot melt adhesive system, dispensing units including the pump, and a method of operating a pump for pumping a liquid like liquid hot melt adhesive. The pump has a piston movable within a pumping chamber for transferr... | 06/03/2008 |
| 7367786 | Linear compressor A linear compressor includes: a cylinder block forming a compressing chamber; a piston reciprocatably provided in the compressing chamber; a reciprocating member connected to the piston to reciprocate with the piston as a single body; a driver driving the reciprocat... | 05/06/2008 |
| 7351044 | Multi-stage piston type compressor In order to achieve a high level of impermeability with a low closing force for the sealing elements of a multistage piston compressor, the overflow channel (19) in the valve piston (9) opens into at least two passages (26, 27) and the sealing p... | 04/01/2008 |
| 7348526 | Microwave-assisted chromatography preparation An instrument and associated method are disclosed for preparing samples for column chromatography. The method includes the steps of applying microwave energy to a sample composition containing at least one solvent to encourage a chemical reaction and generate desire... | 03/25/2008 |
| 7322804 | Metering pump device for a vehicle heater A metering pump device for a vehicle heater includes an inlet chamber, an outlet chamber, a first valve arrangement between the inlet chamber and the outlet chamber, which permits a fluid exchange substantially only from the inlet chamber to the outlet chamber, a di... | 01/29/2008 |
| 7284967 | Reliability-improving structure of reciprocating compressor In a reliability-improving structure of a reciprocating compressor, by minimizing vibration noise occurred in operation, adjusting a quantity of compression gas accurately, measuring an air gap in order to uniform an air gap of a reciprocating motor in an assembly p... | 10/23/2007 |
| 7278476 | Retrievable stress and torque reducing tool A stress and torque reducing tool has a plunger that reciprocates inside of a body. The tool is connected between the pump and the sucker rod string and reduces stress transmitted therebetween. The body has upper and lower fluid ports to allow the ingress and egress... | 10/09/2007 |
| 7249938 | Linear compressor Disclosed herein is a linear compressor. In the present invention, the configuration that a sealing protrusion is protruded in a sealing part of a cylinder toward an exhale cover leads line contact with the exhale cover and the sealing protrusion of the sealing part... | 07/31/2007 |
| 7165951 | High-pressure generating device A high-pressure fluid is continuously generated with high efficiency without causing pulsation of pressure by reciprocally moving a piston having first, second and third chamber sections under the control of an actuator including an operating pressure source and a d... | 01/23/2007 |
| 7147442 | Automatic oil pump, with a valved pumping piston and a valved driving piston unit An automatic oil pump includes a drive chamber, having a reciprocal driving device, and an oil chamber, having a sucking device, located on two sides of a main body. The reciprocal driving device has a piston unit having a valve chamber at its center and a balance v... | 12/12/2006 |
| 7063520 | Suction valve assembly of reciprocating compressor In a reciprocating compressor including a piston slide-inserted into the compression space of the cylinder, having a gas path therein, inducing a fluid into the compression space through the gas path and varying a volume of the compression space while performing a l... | 06/20/2006 |
| 6986651 | Pump priming apparatus A pump priming apparatus including a housing through which fluid object material may be urged to flow, the housing including an intake portion and a pumping portion downstream from the intake portion. The apparatus further includes a piston assembly carried for reci... | 01/17/2006 |
| 6913450 | Suction valve coupling structure for reciprocating compressor A suction valve coupling structure for a reciprocating compressor is disclosed in which a piston being linearly moved in a cylinder upon receipt of driving force from an electric mechanism unit, according to which gas flows through a gas flow passage formed therein,... | 07/05/2005 |
| 6905315 | Valve plate in an air compressor An air compressor includes a valve plate with cooling fins and a piston also having cooling fins. The valve plate includes an integral and angled valve plate outlet. The angling of the valve plate outlet reduces turbulence and improves compressed air flow. The pump ... | 06/14/2005 |
| 6840747 | Positive-displacement oil pump A positive-displacement oil pump is disclosed. In the oil pump, an insert body is fitted into a central opening of a shaft body to a height of an oil-feeding hole. The insert body is rotated along with the shaft body, and includes a central hole formed in the insert... | 01/11/2005 |
| 6817846 | Gas compressor and method with improved valve assemblies A gas compressor and method according to which a piston assembly reciprocates in a bore to draw the fluid to be compressed into the bore during movement of the piston unit in one direction and to compress the fluid during movement of the piston unit in the other dir... | 11/16/2004 |
| 6793471 | Fluid machine The fluid machine can be used as a pump, compressor, motor and internal combustion engine and is characterized by two mobile opposite cylinders fixed rigidly to each other. Said cylinders move simultaneously in the same direction. Inside the opposite cylinders there... | 09/21/2004 |
| 6779986 | Radial piston pump The invention relates to a radial piston pump, comprising an inlet chamber with an inlet connection, an eccentric which may be driven in a rotating manner, arranged within the inlet chamber, for driving at least one piston of the radial piston pump, a cylinder bore ... | 08/24/2004 |
| 6773240 | Single piston dual chamber fuel pump A fuel pump for an automotive vehicle includes a housing having an opening extending therethrough, and a piston slidably supported within the opening. A pair of end caps are mounted to the housing, thereby encasing the piston within the opening. First and second pum... | 08/10/2004 |
| 6746221 | Traveling valve for sucker rod pumps A traveling valve for use in a sucker rod pump having a cylindrical housing having an interior passageway and a tapered shoulder formed therein and a piston received within the interior passageway and slidable therein. The piston has a mechanically operated sliding ... | 06/08/2004 |
| 6676388 | Gas compression apparatus for reciprocating compressor A gas compression apparatus for a reciprocating compressor includes a reciprocating motor generating a linear reciprocal driving force, a compressing cylinder positioned within a predetermined distance from the reciprocating motor, a position controlling ... | 01/13/2004 |
| 6666663 | Gas suction apparatus for a reciprocating compressor with a piston inertia valve A gas suction apparatus for a reciprocating compressor, including a piston having a gas flowing passage where refrigerant gas flows, being inserted in the compression space formed in a cylinder enabling linear reciprocating movement, a fixing means combin... | 12/23/2003 |
| 6648612 | Oil-free air compressor An oil-free air compressor is characterized in an air inlet provided at a lateral open end of a crankcase of the air compressor. External air enters into the crankcase via the lateral air inlet and then enters into a cylinder above the crankcase via a che... | 11/18/2003 |
| 6644943 | Reciprocating compressor with a linear motor A reciporcating compressor with a linear motor, comprising a pair of pistons (4) provided inside a cylinder (3) and axially aligned to each other, at least one of said pistons (4) being provided with a discharge valve (10) for controlling the discharge of... | 11/11/2003 |
| 6634867 | Shuttle piston assembly with dynamic valve A portable, high capacity air compressor system for charging air tanks over wide pressure ranges with maximum volumetric efficiency is characterized by employing a shuttle piston assembly in which piston pairs are arranged with axially aligned cylinder pa... | 10/21/2003 |
| 6616426 | Airlift piston mechanism An airlift piston mechanism is disclosed to include a casing having a piston chamber, an air inlet, a check valve in the air inlet, and an air outlet, a link, a piton reciprocated by the link in the piston chamber, the piston having an air accumulation ch... | 09/09/2003 |
| 6602060 | Compressor employing piston-ring check valves A reciprocating compressor (26) includes two pistons (56 and 58) driven in opposite directions in a piston chamber (54). As a piston is driven in the downstream, compression-stroke direction, pressure causes a piston ring (64 or 66) that seals against the... | 08/05/2003 |
| 6599107 | Piston pump having housing with a pump housing and a pump assembly drive housing formed therein A fluid pump for pumping a volume of fluid under pressure from a fluid source to a fluid dispenser includes an electric motor. A pump drive assembly is operably coupled to the motor for reducing an output of the motor. A pump assembly is operably coupled ... | 07/29/2003 |
| 6585500 | Valve fastening structure of a reciprocating compressor utilizing permanent magnets A valve fastening structure of a reciprocating compressor is provided. The valve fastening structure of the reciprocating compressor includes a piston, which is combined with a moving magnet of a driving motor and is in a linear reciprocating motion insid... | 07/01/2003 |
| 6582203 | Radial piston pump The invention is based on a radial piston pump (1) with a pump body (2), in which pump body (2) are placed pistons (4), and cylinders (5) arrayed radial to a cam (14) and the pistons (4) upon an inward thrust suck in fluid by means of suction side intakes... | 06/24/2003 |
| 6568925 | Abrasive liquid pump apparatus and method An abrasive liquid pump having a pump housing and a piston component configured for slidable movement within the pump housing. The pump housing has a bottom housing portion with a bottom end and a bottom mid-pump end and a top housing portion with a top e... | 05/27/2003 |
| 6551079 | Ink-jet recording apparatus and parts thereof When a piston unit and a valve unit employed in a recording head of an ink-jet recording apparatus were manufactured by a conventional method, comprising parts for these unit were separately formed and assembled, which required considerable man-hours for ... | 04/22/2003 |
| 6537040 | Radial piston pump The invention is based on a radial piston pump (1) with a pump body (2), in which pump body (2) are placed pistons (4), and cylinders (5) arrayed radial to a cam (14) and the pistons (4) upon an inward thrust suck in fluid by means of suction side intakes... | 03/25/2003 |
| 6530760 | Air compressor An air compressor includes a valve plate with cooling fins and a piston also having cooling fins. The valve plate includes an integral and angled valve plate outlet. The angling of the valve plate outlet reduces turbulence and improves compressed air flow... | 03/11/2003 |
| 6499974 | Piston pump A piston pump having a piston axially movable against the force of a spring within an operating chamber connected via check valves to an operating cylinder and a hydraulic medium supply. A section of the piston that extends into the operating chamber has ... | 12/31/2002 |
