Did You Know...
...that Charles Goodyear performed some of his experiments on rubber while in debtor's prison? He was there so often he referred to it as his "hotel". Chronically in debt because of poor business sense and ill health, Goodyear depended on the generosity of friends and family. Even after he unlocked the secret to vulcanizing rubber, he was unable to improve his financial situation. When he died, his estate was $200,000 in debt.
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| Number | Title | Issue Date |
| 7766631 | Piston pump To provide an efficient piston pump having a small number of parts and simple assembly steps, and consuming less current in achieving a relatively low ultimate pressure. The piston pump comprises: a suction port (28) through which gas sucked by varying the vo... | 08/03/2010 |
| 7547201 | Compact simplified compressor apparatus A compact simplified compressor apparatus is provided with a rotating shaft rotationally driven by a motor, a compact compressor activated by the rotating shaft, an air feeding means for feeding a high-pressure air from the compact compressor to a tire, and a power ... | 06/16/2009 |
| 7354256 | Fluid end for duplex pumps A fluid end for a duplex mud pump. In one implementation, the fluid end includes two liner blocks, each having a central passage. The fluid end further includes two fluid inlets disposed on a side portion and two fluid outlets disposed on a top portion and a suction... | 04/08/2008 |
| 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 |
| 7287547 | Inlet or outlet valve for a pump An inlet or outlet valve for a pump comprises a closing body (3) pretensioned by a spring element (4). The closing body (3) can open or close a passage on a valve seat (2). The valve also comprises a guide element (5) for guiding t... | 10/30/2007 |
| 7267533 | Plunger assembly for use in reciprocating fluid pump employing reversing polarity motor A reciprocating pump includes a drive section and a pump section. The drive section has a reciprocating coil assembly to which alternating polarity control signals are applied during operation. A permanent magnet structure of the drive section creates a magnetic flu... | 09/11/2007 |
| 7255248 | Plug style pump The embodiment of the invention are directed to a dispenser assembly having a reservoir bottle with an opening for fluid communication. The opening is formed to receive a housing cap and a dispensing pump such that the dispensing pump is sealingly engaged to the bot... | 08/14/2007 |
| 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 |
| 7241120 | Piston machine with ported piston head A piston machine includes a cylindrical wall (2) defining a swept volume (1) and having a plurality of gas inlet openings (5), and a piston (3) reciprocating in the swept volume (1), and the piston head (12) of which is form... | 07/10/2007 |
| 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 |
| 7118352 | Hydraulic metering device The metering device for a liquid medium comprises a cylinder and a piston operatively disposed therein to define a metering chamber ahead of the piston. The outlet end of the cylinder is open and closed by an evacuation valve. The piston is driven forwardly through ... | 10/10/2006 |
| 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 |
| 7040417 | Drilling systems The present invention discloses, in certain aspects, systems and methods for producing cyclical impacts and, in certain aspects for moving a drilling apparatus for drilling a borehole in a formation, the system in certain embodiments including a housing with a longi... | 05/09/2006 |
| 7003964 | Heat pump system A heat pump system (10) including a heat generator (15), a heat engine (26) supplied with heat engine working fluid (18) by the heat generator (15) having a heat engine cylinder chamber (34), a heat engine piston (32)... | 02/28/2006 |
| 7004248 | High expansion non-elastomeric straddle tool The present invention involves a pack-off system for use in packing off an area of interest within a wellbore. The pack-off system comprises at least two packing elements disposed on a tubular body. The packing elements of the present invention comprise overlapping ... | 02/28/2006 |
| 6979184 | Manual negative pressure pump device A manual negative pressure pump device comprises a suction cylinder, a handle, a pull, a piston, and an expandable spring which forms a vacuum absorbing device. A front end of the suction cylinder is a thread post with outer thread. The thread post has a central thr... | 12/27/2005 |
| 6973971 | Down hole well cleaning apparatus An apparatus and a method for cleaning the open perforations in a well and for bailing a well. The apparatus has a tubular conduit with at least one seal attached to it that forms a seal between the well casing and the exterior of the conduit. The seal is held in pl... | 12/13/2005 |
| 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 |
| 6902703 | Integrated sample-processing system The invention provides an integrated sample-processing system and components thereof for preparing and/or analyzing samples. The components may include a transport module, a fluidics module, and an analysis module, among others. ... | 06/07/2005 |
| 6835052 | Suction valve assembly of reciprocating compressor A suction valve assembly of a reciprocating compressor includes: an inertial valve having a valve plate detachably attached at a valve seat of a piston, and opening and shutting the suction passage, and a support bar extended from a rear side of the valve plate, ins... | 12/28/2004 |
| 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 |
| 6802701 | Suction valve assembly of compressor A suction valve assembly of a compressor includes: a piston disposed movable in a cylinder forming a compression chamber, having a suction passage for sucking a fluid and a valve seat formed at a front side thereof; a valve body contacted to the valve seat to open a... | 10/12/2004 |
| 6746220 | Pressure fluid-delivery device A pressure fluid-delivery device comprising a cylinder, a piston and a reservoir for a fluid. A V-seal is mounted in an annulus between the cylinder and the piston. An axial movement of the piston forwards relative to the cylinder results in a delivery of a pressure... | 06/08/2004 |
| 6695596 | Suction gas valve apparatus of reciprocating compressor In a suction valve apparatus of a reciprocating compressor including a piston having a gas passage at which gas flows inside its body portion, a valve seat formed at an end of a piston body to open the gas passage and a step face formed so as to have a th... | 02/24/2004 |
| 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 |
| 6648614 | Piston pump The present invention relates to a piston pump, which is in particular appropriate for the pressure fluid delivery in electronically controlled brake systems, including a housing, a suction valve, a pressure valve, and a pump piston that is designed as a ... | 11/18/2003 |
| 6530761 | Double-acting, two-stage pump A reciprocating pump includes a housing, a piston slideably mounted within the housing for a reciprocating movement, a shaft connected to the piston and adapted for reciprocating movement concurrently with the piston, an inlet valve, a discharge valve, an... | 03/11/2003 |
| 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 |
| 6435846 | 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 ... | 08/20/2002 |
| 6260736 | Condiment pump A condiment pumping system for dispensing food products from a dispensing chamber by the operation of a piston assembly which during the dispensing action the dispensing chamber is refilled and during the return stroke of the piston assembly the food prod... | 07/17/2001 |
| 6171070 | High-pressure reciprocating pumps A high-pressure reciprocating pump is constructed such that a plurality of plungers connected to a driver are made to move back and forth and intake channels or discharge channels are opened and closed by valves in synchronism with movements of the plunge... | 01/09/2001 |
| 6148923 | Auto-cycling plunger and method for auto-cycling plunger lift An auto-cycling plunger and method for lifting out condensate and fluid that accumulate and retard production in oil and gas wells. The auto-cycling plunger comprises a tube that defines an inner chamber, one or more flapper sealing rings mounted on the t... | 11/21/2000 |
| 5980222 | Hermetic reciprocating compressor having a housing divided into a low pressure portion and a high pressure portion A compressor assembly includes a compressor mechanism mounted within a hermetically sealed housing. The housing is effectively divided into a low pressure area at a relatively low temperature and a high pressure area at a relatively high temperature. A mo... | 11/09/1999 |
| 5947708 | Axial flow valve system for linear compressor An axial flow valve system for a linear compressor which is capable of enhancing the operation of the compressor by securely fixing an intake valve comprising an axial flow valve system to prevent an undesired axial movement of the intake valve, promptly ... | 09/07/1999 |
| 5911272 | Mechanically pumped heat pipe A mechanically pumped heat pipe having an evaporator section and a condenser section disposed at a location below the evaporator section. A solenoid actuated cavitation-free mechanical pump returns a working fluid from the condenser section to the evapora... | 06/15/1999 |
| 5897303 | Blind pore piston pump with internal valve and stroke limiting spring winding The invention relates to a piston pump, having a piston that has a longitudinal bore, that includes a valve seat face upon which a valve closing body is pressed by a valve spring. The valve spring is a helical compression spring, whose winding diameter in... | 04/27/1999 |
| 5897304 | Flow-through vertical filling pump with a plurality of diaphragms A flow-through filling pump for receiving a liquid supply and discharging a predetermined amount of the liquid therefrom includes a housing defining a supply chamber and a discharge chamber and a reciprocating piston positioned in the housing intermediate... | 04/27/1999 |
| 5846060 | Reciprocating piston pump with bleed passages A pump which has a piston (30) which is reciprocatingly moved vertically inside a tubular housing (32) to extract fluid from the bottom of a well (29). The piston (30) is attached to a motor (12) for driving it and has a horizontally extending base plate ... | 12/08/1998 |
| 5836749 | Piston type liquid fuel pump with an improved inlet valve A fuel injection system for injecting gasoline or other fuel directly into the combustion chambers of an internal combustion engine including a fuel pump with a plurality of fuel pumping pistons mounted within cylinders formed in a fixed barrel member. Ea... | 11/17/1998 |
| 5816787 | Motion conversion rotator apparatus and method A method and apparatus to convert the torque of a drive shaft into reciprocating energy to drive and pull a piston utilizing a nodal rotator attached to the drive shaft, or alternatively to convert reciprocating energy into torque, said rotator having com... | 10/06/1998 |
