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| Number | Title | Issue Date |
| 8167591 | High pressure air pump with reciprocating drive A reciprocating air pump with a frame and a pump for compressing air through a series of linear close-strokes and open-strokes between a first portion and a reciprocating portion. The pump includes plural cylinders, slideably and sealably engaged therein, and arrang... | 05/01/2012 |
| 8047818 | High pressure, multiple-stage air pump with valve body inlet port arrangement A multiple-chamber, multiple-stage reciprocal pump for compressing air through a series of up-strokes and down-strokes. The pump includes an upper reciprocal portion and a fixed portion. The fixed portion further includes a base housing with an ambient air inlet cav... | 11/01/2011 |
| 7384249 | Fluid metering system A fluid metering system includes a housing having a piston chamber with first and second spaced ends, at least one housing inlet passage, and at least one housing outlet passage. The housing inlet and housing passages communicate with the piston chamber. A piston is... | 06/10/2008 |
| 7349293 | Pressure control apparatus and rotation drive mechanism A pressure control apparatus according to the present invention is comprised of a magnetostrictive element section disposed between respective one ends of rotating rods which have the one ends thereof arranged on the same axis in a state connected to each other such... | 03/25/2008 |
| 7331768 | Pump with gauge A pump includes a base, a pumping set, a first joint, a gauge set, a second joint and a nozzle. The base includes a socket. The gauge set includes a gauge, a housing for receiving the gauge and a tube extending from the housing. The pumping set includes a cylinder i... | 02/19/2008 |
| 7121812 | High pressure pump having replaceable plunger/valve cartridges A high pressure fluid jetting system generally includes a fluid cylinder pump, a drive assembly, a pressurized liquid supply and an applicator gun. The drive assembly includes a diesel engine or electric powered motor which drives a rotatable drive shaft. The drive ... | 10/17/2006 |
| 7063521 | Collapsible handgrip for inflator An inflator includes a hollow handgrip and an air cylinder having a shaft. One end of the shaft is connected with a piston in the cylinder and the other end of the shaft is provided with a stud extending out of the cylinder. A bottom wall and an opening are arranged... | 06/20/2006 |
| 7022179 | Self-repairing, reinforced matrix materials Self-repairing, fiber reinforced matrix materials include a matrix material including inorganic as well as organic matrices. Disposed within the matrix are hollow fibers having a selectively releasable modifying agent contained therein. The hollow fibers may be inor... | 04/04/2006 |
| 6955531 | Pump for inflating and deflating an inflatable object with a rotatable nozzle assembly A pump is capable of inflating and deflating an inflatable object. The pump includes a cylinder, a piston and a nozzle. The cylinder defines an outlet through which air can only flow into the cylinder and an inlet through which air can only flow from the cylinder. T... | 10/18/2005 |
| 6953326 | Air pump having air cylinder/manual dual charging mode An air pump includes a connector connecting to an air nozzle of an object to be inflated, a holder block connected to the connector and having a valve chamber, an air cylinder air inlet and a manual charge air inlet extended from the vale chamber to the rear side th... | 10/11/2005 |
| 6641766 | Positive displacement extrusion of viscous material A positive displacement extruder for a viscous material, such as unvulcanized rubber, includes a feed member arranged in a chamber of a main body and driven for rotation so that the viscous material charged into the chamber is extruded from its outlet. A ... | 11/04/2003 |
| 6602061 | Easy-to-hold hand pump A hand pump includes a head, a cylinder, a piston rod, a first handle, and a second handle. The head includes a valve-engaging portion for engaging with a valve of an article to be inflated. A first end of the cylinder is connected to the head. A piston i... | 08/05/2003 |
| 6565333 | Fluid discharge apparatus and fluid discharge method A positive displacement pump is composed of a first actuator for relatively moving a piston and a housing, a cylinder for accommodating the piston, and a second actuator for relatively moving the cylinder and the housing.... | 05/20/2003 |
| 6514055 | Piston pump having a hollow piston The invention relates to a piston pump for a slip-controlled hydraulic vehicle brake system. For the sake of a short structural length of the piston pump, piston of the piston pump is a hollow piston, whose interior forms a positive displacement chamber o... | 02/04/2003 |
| 6325601 | Manual air pump having selectable high pressure and high volume modes A manual air pump includes an outer cylinder comprising a chamber therein, a head provided to an end of the outer cylinder, the head including an outlet passage communicated with the chamber for supplying air to an object to be inflated, and an inner cyli... | 12/04/2001 |
| 6257849 | Manual air pump having selectable high pressure and high pressure modes A manual air pump includes an outer cylinder having a chamber therein, a head provided to a second end of the outer cylinder and including an outlet passage communicated with the chamber for supplying air to an object to be inflated, and an inner cylinder... | 07/10/2001 |
| 6220772 | Fluid-dispensing and refilling system for a power toothbrush A pump used in a power toothbrush for fluid delivery to the bristles. The pump moves fluid provided to it to a dispensing valve located in the brushhead. The pump includes a pump chamber with a piston ball located therein. The piston ball moves within the... | 04/24/2001 |
| 6135733 | Manual air pump having selectable high pressure and low pressure modes A manual air pump includes a cylinder having a first chamber and a head provided to the second end of the cylinder. The head includes an outlet passage communicated with the first chamber for supplying air to an object to be inflated. A first piston rod h... | 10/24/2000 |
| 6132189 | Combined bicycle tire and air suspension pump with removable pressure gauge A pump includes a first cylinder with a first valve member connected to a first end of the first cylinder and a first handle disengagably connected to a second end of the first cylinder. A first piston is movably received in the first cylinder and a secon... | 10/17/2000 |
| 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 |
| 6079954 | Air pumping station for pneumatic toy vehicle An air pumping station for a pneumatic toy vehicle powered by a re-fillable compressed air bottle or canister includes a stabilizing base having a flat ground engaging horizontal lateral bottom including a horizontal projecting geometry proportioned for p... | 06/27/2000 |
| 5873705 | Tire pump A tire pump includes a head portion with a tubular portion extending therefrom and a main passage is defined through the head portion and communicates with the tubular portion, a connecting member slidably mounted to the tubular portion and having at leas... | 02/23/1999 |
| 5779457 | Hand pump for pumping air of lower pressure and high pressure A hand pump includes a cylindrical member having a cap secured on top and a cover securing the cap to the cylindrical member. A large piston is slidably engaged in the cylindrical member and a barrel secured to the large piston. A small piston is slidably... | 07/14/1998 |
| 5651302 | Actuator pump An actuator pump has one or more colinear piston cylinders (2, 3, 25) in a cylinder housing (1) in which change of volume is provided by reciprocative relationship of colinear pistons (4, 5, 23, 24,) in the colinear piston cylinders. One or more travel gu... | 07/29/1997 |
| 5558504 | Magnetostrictive pump for applying pastes and adhesives A device is proposed for applying material such as solder paste and glue in discrete points, particularly for applying solder paste on electronic circuit boards. The device comprises a pump house (202-205; 301, 307), a tube or a channel (206) by means of ... | 09/24/1996 |
| 5544637 | Simplified pumps for fuel injection A fuel injection pump for internal combustion engines, where the driving source is the movement of an axle (11) held at the rod head whenever this is activated by the engine crankshaft (10), adjusting such movement by the use of auxiliary pieces (14, 17, ... | 08/13/1996 |
| 5542939 | Fluid aspiration-collection apparatus The present invention pertains to a fluid aspiration-collection apparatus for aspirating and collecting a fluid into a suction chamber through a fluid inlet communicating with the suction chamber in the case, and for discharging the fluid through a fluid ... | 08/06/1996 |
| 5518376 | Combined housing and air pump A combined housing and air pump has a barrel type outside vessel one end of which is closed and the other end of which is open, a barrel type inside vessel one end of which is closed and the other end of which is open, and an air suction opening and an ai... | 05/21/1996 |
| 5443370 | Two cylinder manual air pump An air pump comprises a head; an air guiding tube fastened at one end thereof with the head and at another end thereof with a two-way air admitting piston; a first cylinder fitted over the two-way air admitting piston such that the first cylinder can be c... | 08/22/1995 |
| 5417065 | Oil pressure device of jack An oil pressure device for a jack whereby a hydraulic jack is adapted to raise rapidly until the lifting portion of the jack reaches a load sufficient to overcome a spring operating force, at which point the operation of the jack shifts to a slower, more ... | 05/23/1995 |
| 5285932 | Apparatus for delivering fluids in proportional quantities An apparatus for mixing two fluids in precise proportions which includes a quantifying meter and a concentrate meter. The apparatus also includes apparatus connecting the quantifying meter and the concentrate meter to simultaneously operate the quantifyin... | 02/15/1994 |
| 5044900 | Positive displacement shuttle pump A positive displacement shuttle pump having a cylinder with axially displaced and mutually isolated inlet and outlet portions; a shuttle piston having a reservoir for accepting pressurized feed from the inlet port in the feed cycle and for dispensing feed... | 09/03/1991 |
| 4893738 | Self-aligning positive displacement dispenser Modular positive displacement apparatus for dispensing precise quantities of a fluid product including a dispensing unit and an actuator unit. A housing of the dispensing unit defines a reservoir, a chamber and closure valve. The reservoir is divided into... | 01/16/1990 |
| 4840548 | High pressure plunger pump A high pressure plunger pump comprises a centrally arranged pressure valve, an oscillatingly movable plunger, a sleeve guided on the plunger and limiting a working chamber, a suction pump which surrounds the sleeve and accommodates an aspirated fluid, the... | 06/20/1989 |
| 4762474 | Pump having reciprocating pipe and slidably supported hollow body A bore hole pump which eliminates the need for a piston sealingly engaging with the walls of the pump body. The pump comprises a hollow body closed at its lower end by a non-return inlet valve and slidably and sealingly supporting at its upper end, via a ... | 08/09/1988 |
| 4755113 | Sleeve pump A compact sleeve pump is provided that is particularly adaptable to fluid dispensing systems having multiple pump groupings. The sleeve pump includes a generally cylindrical valving spool and generally cylindrical dispensing piston, shiftably received wit... | 07/05/1988 |
| 4687408 | Lock for the transport of bulk material In a lock for the transport of bulk material between chambers being under different pressure a lock chamber (4) is guided tightly and driven by a reciprocal movement in a preferably horizontal guide tube (2), which comprises on different sides of its wall... | 08/18/1987 |
| 4615661 | Magnetic pump A magnetic pump having a housing or block with three compartments and a port for supplying fluid into the center compartment. A pair of receivers are mounted in the center compartment and have check valves to allow fluid to flow into the receivers and out... | 10/07/1986 |
| 4574828 | Hand held and hand operated pumping and siphoning device A hand held and hand operated device is capable of pumping or siphoning a liquid. The device includes a pair of telescoping hollow tubes having a single longitudinal axis with a seal therebetween that is maintained when one of the tubes is reciprocated re... | 03/11/1986 |
| 4534716 | Down hole pump A positive displacement pump includes a cylindrical housing which is divided in half by a partition. Each end of the housing lies proximate to an end plate to define peripheral inlet openings into each of said halves. Axial outlets and pistons are also pr... | 08/13/1985 |
