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 |
| 8016575 | Pump for drawing fluid A fluid drawing device (10) comprising a hand pump (11) connected to a fluid reservoir (12). The reservoir (12) has an inlet/outlet orifice (18) through which fluid can be drawn into and expelled from the reservoir (12). The... | 09/13/2011 |
| 8007258 | Portable air pump A portable air pump includes a tubular body, a barrel, a piston mechanism, a head, and a dispensing head. The tubular body has an upper cover having air inlet holes and a sealed bottom cover. The barrel has an air passage running through it along its axis direction.... | 08/30/2011 |
| 7717685 | High pressure pumping cartridges for medical and surgical pumping and infusion applications Pumping cartridges useful for medical and surgical pumping and infusion procedures. In one aspect, a series of pumping cartridges include cylinders and pistons which have a sealing component including a circumferential, flared sealing flange and can be configured to... | 05/18/2010 |
| 7377757 | Fluid pump with enhanced seal The invention concerns a fluid pump with a cylinder, piston and check valve for compressing the fluid having a high-pressure seal for precluding leakage of pressurized fluid. Any leakage from the high-pressure seal feeds back into an inlet area of the pump and recyc... | 05/27/2008 |
| 7210561 | Lubricating device of reciprocating compressor A lubricating device of a reciprocating compressor includes a pumping unit for pumping lubrication oil contained in a lower portion of a case and a front frame having a supply hole which supplies the lubrication oil pumped from the pumping unit to a sliding part wit... | 05/01/2007 |
| 7182226 | Dosing device comprising a medium reservoir and corresponding pump device The invention relates to a dosing device that comprises a medium reservoir (S) and a pump device for dosing and dispensing a medium stored in said medium reservoir. The pump device is associated with a pump chamber, and with at least one inlet and one outlet valve. ... | 02/27/2007 |
| 7150315 | Downhole fluid disposal apparatus and methods A seal cartridge and barrel manifold seal are provided for use in a subterranean well and in a method to inject fluid, that is initially produced into the well from a subterranean formation or zone, into another subterranean formation or zone. The seal cartridge has... | 12/19/2006 |
| 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 |
| 7040375 | Diecasting machine and plunger lubricating method A diecasting machine comprising a movable and a stationary die half which, when closed, define a die cavity. The diecasting machine further comprises a filling chamber for receiving liquid metal, plunger, a slidingly displaceable inside the filling chamber and mount... | 05/09/2006 |
| 7025134 | Surface pulse system for injection wells The present invention relates to petroleum recovery operations, and more particularly, to the use of pulse technology to enhance the effectiveness of waterflooding operations. The systems of the present invention generally comprise an injection means for continually... | 04/11/2006 |
| 6945762 | Mechanically actuated gas separator for downhole pump A reciprocating downhole pump has a gas separator located at its bottom end. The separator forms a chamber that is expanded and contracted when the pump is reciprocated. Expansion and contraction of the chamber occurs by either the plunger reciprocating in the chamb... | 09/20/2005 |
| 6893232 | Hand operable pump An easily operable telescopic pump includes a first cylinder, a second cylinder, a grip and a nozzle. The second cylinder is inserted in the first cylinder. The grip is communicated with the second cylinder. The nozzle is communicated with the grip. A pipe extends t... | 05/17/2005 |
| 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 |
| 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 |
| 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 |
| 6669453 | Pump assembly useful in internal combustion engines A pump assembly for mounting a high-pressure oil pump on an internal combustion engine where the pump in the assembly is mounted in a closed chamber and a solenoid controlled valve is mounted outside of the chamber.... | 12/30/2003 |
| 6641375 | Pneumatically operated oil pump A pneumatically operated oil pump comprises an outer tube for extending into an oil tank and a sucking tube moveably arranged within the outer tube. The sucking tube includes one-way valve establishing an airtight arrangement with respect to an inner wall... | 11/04/2003 |
| 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 |
| 6572348 | Electromagnetic compressor having an integral cylinder assembly and electromagnet molded from a resin An electromagnetic compressor capable of reciprocating a piston to suck in and compress a gas by the force of an electromagnet and the resilient force of a return spring and a manufacturing method therefor are provided. The compressor includes a cylinder ... | 06/03/2003 |
| 6537042 | Positive-displacement pump A positive-displacement pump (lifting pump) comprises a pump housing with a pump chamber having an inlet and an outlet passage controlled by an outlet check valve; a displacement member which delimits the pump chamber in one direction of movement of the d... | 03/25/2003 |
| 6497560 | High volume low pressure air pump A high-volume low pressure hand operated air pump comprised of a tube body with a plunger shaft inserted into one end thereof and a check valve at the other end thereof with a floating seal secured to the internal end of the plunger shaft comprised of a c... | 12/24/2002 |
| 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 |
| 6419468 | Reciprocating siphon suction pump A container includes an integral outlet tube that functions as a cylinder. A siphon mechanism including an elongated tube with a flexible seal on the outside surface of the tube functions as a piston. Fluid trapped inside the cylinder by a check valve is ... | 07/16/2002 |
| 6398527 | Reciprocating motor with uni-directional fluid flow A double-acting reciprocating motor with uni-directional fluid flow path comprises a piston disposed within a cylinder. A first chamber is defined by the cylinder space between the piston and a cylinder base. A second chamber is defined by the cylinder sp... | 06/04/2002 |
| 6398523 | Linear compressor The present invention relates to a linear compressor, and in particular, to a linear compressor which is capable of decreasing the specific volume of a sucked refrigerant gas by decreasing the amount of the refrigerant gas to be introduced into a suction ... | 06/04/2002 |
| 6368071 | High pressure fuel pump An axial plunger pump includes a shaft having a swash plate effecting swing motion and transmitting driving force from the outside, plungers reciprocate by the swing motion of the swash plate. A cylinder block has cylinders formed so as to open on the sid... | 04/09/2002 |
| 6270327 | Pneumatic hand pump A hand pump has a tubular pump housing with a longitudinal axis. A piston with a peripheral seal reciprocates along the axis to compress air against a sealed end of the housing. A tubular plunger nested in the housing connects to the piston to reciprocate... | 08/07/2001 |
| 6257850 | Piston and seals for a reciprocating pump A piston and seals for a reciprocating pump improve pumping of subterranean fluids containing fine solids to surface. The pump comprises a pump barrel and piston. The piston is suspended from a reciprocating rod string or from reciprocating production tub... | 07/10/2001 |
| 6099274 | Pump to surface pump A reciprocating pump is provided for pumping subterranean fluids containing fine solids to surface. The pump comprises a pump barrel, piston and piston rod. The piston rod is suspended form reciprocating production tubing. The barrel is anchored in the ca... | 08/08/2000 |
| 6077056 | Reciprocating pump The invention relates to a high pressure reciprocating pump, for a fuel injection system of an internal combustion engine, having at least one piston, which is displaceably supported in a piston guide provided in a housing and therein defines a work chamb... | 06/20/2000 |
| 6065947 | Two-stroke operable pump A pump includes a main body, a piston slidably received in the main body, and a hose having a first end attached to an end of the main body and a second end attached to the piston. A handle is attached to a piston rod, which, in turn, is attached to the p... | 05/23/2000 |
| 5984651 | Hydraulic brake system The present invention relates to a hydraulic brake system which operates by the feedback principle during brake slip control operations and includes a self-priming pump that aspirates pressure fluid from a pressure fluid reservoir for traction slip contro... | 11/16/1999 |
| 5975360 | Capped piston pump A disposable plastic pump for dispensing liquids is disclosed which comprises two basic unitary, preferably all plastic, elements: a chamber forming body having an open outer end and an inner end in fluid communication with a liquid reservoir, and a pisto... | 11/02/1999 |
| 5931647 | Volumetric pump with bi-directional piston seal A volumetric pump for administering intravenous fluids to a patient comprises a housing having an elongate cavity therein with an open and a closed end. A resilient sheet of material having two branched portions which form a centrally-located aperture is ... | 08/03/1999 |
| 5921759 | Liquid metering piston pump and valves capable of being cleaned and sterilized without disassembly An inverted, displacer type piston pump for metering and dispensing liquids in which the cylinder is located beneath the piston and reciprocated via an actuator below the cylinder, and where the piston is held fixed. The liquid ingress and egress to and f... | 07/13/1999 |
| 5915927 | Reciprocating pump for generating fluid pressure A plunger pump includes a piston which is driven for reciprocatory motion and associated with a check valve. A space within a cylinder is partitioned by a piston 1p into a first space A which communicates with a discharge port 1ep and a second space B whi... | 06/29/1999 |
| 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 |
| 5829952 | Check valve with a reversible valve ball and seat A reversible valve ball assembly for use in a down-hole pump oil field check valve. The reversible valve ball can be removed, inverted and reinserted into the check valve to provide a new valve ball sealing surface. The reversal of the valve ball is perfo... | 11/03/1998 |
| 5741710 | Reaction chamber and a method for generating a gaseous sample based on the use thereof The invention relates to a reaction chamber, which includes a cylindrical vessel, with at one end, at least one inlet or outlet tube or lead-through fitted with a valve for a liquid or gaseous component. The other end of the vessel is open. The reaction c... | 04/21/1998 |
| 5676277 | Disposable plastic liquid pump A disposable plastic pump for dispensing liquids is disclosed which comprises two basic unitary, preferably all plastic, elements: a chamber forming body having an open outer end and an inner end in fluid communication with a liquid reservoir, and a pisto... | 10/14/1997 |
