Did You Know...
...that in 1800 ether was first used by partyers as a fun diversion? Sniffing the gas led to hilarious and raucous laughter as people watched each other become more and more intoxicated and silly. Several doctors independently realized the value ether would have to anesthetize surgery patients. Of those who claimed rights to the "discovery," none had a happy ending. One had a seizure and died defending his rights. Another spent his life in an asylum because he had been denied acclaim. A third became addicted to chloroform and, in a New York City jail, he soaked a cloth in the drug, severed an artery and bled to death.
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| Number | Title | Issue Date |
| 8187758 | Fuel cell apparatus with a split pump A fluid pump and connector assembly is particularly suited for use in connecting a fuel cartridge to a fuel cell system. The assembly has a first sub-assembly comprising a fluid inlet, a fluid outlet, a flexible diaphragm in fluid communication with the inlet and ou... | 05/29/2012 |
| 7713037 | Pump apparatus In a pump apparatus of the present invention, a portion of fluid sent to a fluid-sending destination is circulated to a pumping driving chamber on one side of a cylinder through a circulation passage. The pump apparatus includes a switching valve which switches infl... | 05/11/2010 |
| 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 |
| 7311087 | Fuel pump with a guided tappet assembly and methods for guiding and assembly A fuel pump for an internal combustion engine including a fuel pump housing, a cylindrical bore having a central axis and being defined by a bore wall surface, a receiving hole formed in the housing, and a tappet assembly received in the cylinder bore. The tappet as... | 12/25/2007 |
| 7303725 | Automated high volume slide staining system An automated slide processing apparatus includes a plurality of work stations arranged in a stack, and a transport/elevator for transporting slides between the various work stations. ... | 12/04/2007 |
| 7270785 | Automated molecular pathology apparatus having fixed slide platforms Apparatus and methods for automatically staining or treating multiple tissue samples mounted on slides are provided, in which the slides and reagent bottles are held in fixed position, and the reagent and wash solutions brought to the slides. ... | 09/18/2007 |
| 7097569 | Restorable sand or pellet pile device A restorable sand or pellet pile is provided for use as an amusement or exercise device. A sand or pellet collection chamber has inclined side walls that converge toward each other in a downward direction and having a bottom surface connected to the side walls. A su... | 08/29/2006 |
| 7029249 | Electronic micro-pump A micropump provided with a cylindrical body (1) containing a measuring chamber (10) defined by a piston (2) and communicating firstly with a tank via an inlet orifice (10a) provided with an inlet valve, and secondly with the outsi... | 04/18/2006 |
| 6971861 | High speed unloader for gas compressor A piston system for a reciprocating compressor is adapted for high speed, high pressure unloading conditions by providing a dual stage piston assembly wherein the piston is adapted for absorbing and redistributing a portion of the load during the high pressure appli... | 12/06/2005 |
| 6808086 | Paste ejection apparatus In a seal mechanism which constitutes a port switching portion in a pump mechanism of a paste ejection apparatus that ejects paste, and which prevents leakage of the paste from a seal portion between a plunger block rotating with a plunger and a fixed seal block (be... | 10/26/2004 |
| 6733254 | Air pumping/extracting duplex pump An air pumping/extracting duplex pump for use in an inflatable device for selectively pumping air into/out of an air chamber of an inflatable device is constructed to include two connected housing, and an actuating mechanism mounted in the housings and manually rota... | 05/11/2004 |
| 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 |
| 6666656 | Compressor apparatus A fluid compressor controls opening and closing of a fluid intake port in the crankcase with a novel and improved form of gate control member which follows rotation of the crankshaft and times the opening and closing of the intake port to coordinate with ... | 12/23/2003 |
| 6634871 | Suction-discharge device for fluids comprising a piston within a rotating inner tube and a plurality of suction and discharge holes An object of the present invention is to provide a suction-discharge device for fluids capable of sucking fluids continuously and discharging fluids continuously under fixed flow rate and pressure, without substantially bringing about pulsations of even o... | 10/21/2003 |
| 6585495 | Reversible volume oil impeller pump with mechanical governor A fluid pump is provided that produces an outflow of fluid that is not proportional to the speed of the input drive. Thus, the fluid pump can be tuned to provide a substantially constant outflow of fluid irrespective of the speed of the input drive. The f... | 07/01/2003 |
| 6579079 | Rotary valve and piston pump assembly and tank dispenser therefor A rotary valve, a piston pump rotary valve assembly and a piston pump rotary valve assembly tank dispenser for use in discharging a metered amount of liquid, gel, or slurry has a valve body having a first channel pathway and a second channel pathway. The ... | 06/17/2003 |
| 6443717 | Variable timing valves for gas compressors and expanders Variable valve timing is provided to control compressors and expanders in a fuel cell powering system in order to provide for matching the displaced volume of the compressor and expander over a range of pressure delivery requirements. A movable timing edg... | 09/03/2002 |
| 6415956 | Hand holdable pump spray apparatus A hand holdable pump spray apparatus is disclosed where the pump mechanism is in the hand holdable wand rather than in a spaced apart liquid container. The wand may be held with one hand while a pump handle is extended with the other hand. This creates a ... | 07/09/2002 |
| 6318644 | Fluid transfer pump wash-out apparatus and method A fluid transfer pump wash-out apparatus is provided to facilitate cleaning of fluid transfer pump system components. The wash-out apparatus is adapted for temporary or permanent insertion between at least one pump liquid source pick-up point and a pump i... | 11/20/2001 |
| 6315532 | Dual disc pump A dual disc pump in which the suction disc is phased to lag by more than 180° behind the pressure disc.... | 11/13/2001 |
| 6170706 | Hand holdable pump spray system A hand holdable pump spray system where the pump mechanism is in the hand holdable wand rather than in the liquid container. The wand may be held with one hand while the pump handle is extended with the other hand. This creates a pressure differential whi... | 01/09/2001 |
| 6168398 | Piston pump having lifting valves with a convex surface A piston pump comprising at least one working space, which is surrounded by a cylinder and which is adapted to be varied by a piston arranged in said cylinder, and at least one inlet valve as well as at least one outlet valve, said valves being lifting va... | 01/02/2001 |
| 6082978 | Valve device in a piston compressor A piston compressor has a valve support, which closes a compression chamber and has an intake valve. A non-rotatable lamella can be moved between two positions, in one position the lamella lifts up from the valve support, leaving intake openings unblocked... | 07/04/2000 |
| 6062826 | Pulsating vibration air generation means A pulsating vibration air generator in which wave height, frequency and wave shape of the pulsating vibration air can be optionally modified and such pulsating vibration air can be periodically and continuously emitted. The pulsating vibration air generat... | 05/16/2000 |
| 5951265 | Fluid driven reciprocating engine or pump having overcenter, snap-action mechanical valve control A fluid driven reciprocating engine includes a main body having an inlet for receiving a primary fluid and an outlet for discharging the fluid. A drive piston is sealingly mounted in the main body for reciprocating movement in response to flow of the prim... | 09/14/1999 |
| 5931648 | Vacuum actuated tubular blood pumping device with active values and application of the same A blood pump having a rigid chamber with a central opening is connected to a vacuum source such that the vacuum source applies a vacuum on an elastic tubular membrane through the opening in the rigid chamber. The blood supply to the chamber is controlled ... | 08/03/1999 |
| 5902094 | Flow control valve for a pressure washer A pressure washer is powered by a prime mover, e.g., an electric motor or an internal combustion engine, and has a flow control valve. The valve has a housing containing a piston assembly and the assembly has a mechanism coupled to it for controlling prim... | 05/11/1999 |
| 5718569 | Dual plunger cassette pump An IV pump actuates a disposable cassette having two parallel fluid paths that include first and second pumping chambers. The disposable cassette (12) has a housing(14) that includes a back portion (152) in which is defined a fluid path (60) between an in... | 02/17/1998 |
| 5683234 | Hand pump apparatus having two pumping strokes and having an attachment member for engaging with different tire valves A hand pump includes a piston slidably engaged in a housing for separating the housing into two chambers. A tube is secured on top of the housing. The piston includes two annular grooves for receiving two sealing rings. A piston rod has one end secured to... | 11/04/1997 |
| 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 |
| 5542452 | Valve assembly In a valve assembly exhibiting zero dead volume the port head is mounted on a solenoid and defines an inlet port on one side of the valve seat, and two outlet ports on the opposite side of the valve seat. A flexible diaphragm is seated across the valve se... | 08/06/1996 |
| 5385456 | Pump for hot chamber die casting of corrosive light alloys A pump for the hot chamber die casting of corrosive light alloys including a body (2) wherein a cavity (3) is formed in which a piston (4) vertically reciprocates and on whose side wall (5) an opening (11) for the introduction of the molten alloy (1) and ... | 01/31/1995 |
| 5292236 | Positive displacement pump with pivot piston valve The pump comprises a cylinder delimiting a pumping chamber in which a piston is mounted to slide between an admission orifice and a delivery orifice, the piston including a pumping orifice which is associated with a closure member mounted to pivot about a... | 03/08/1994 |
| 5252044 | Parenteral fluid pump with disposable cassette An ambulatory parenteral fluid infusion pump employs a disposable in-line cassette which provides three independent fluid paths between two flexible plastic sheets. The fluid path extends through a pump chamber having a piston plate secured to the flexibl... | 10/12/1993 |
| 5203857 | Gas compressor head and discharge valve construction A single or multi-cylinder compressor unit being cylinder wall ported and having suction inlet means to compression chamber means through the wall and top of piston means, wherein suction valve means comprises preferably a light-weight plastic disc means ... | 04/20/1993 |
| 5009579 | Fluid pump encasement An encasement is provided for improving the acoustic characteristics of fluid pumps. The encasement is substantially formed from a material selected from the group consisting of glasses, ceramics, thermoplastic resins and thermosetting resins. Further, th... | 04/23/1991 |
| 4850817 | Mechanical drive system for a medication infusion system A mechanical drive system for use in driving a disposable cassette containing a reciprocating fluid pump and active valves from a main pump unit is disclosed which utilizes a single power module cam to drive both the reciprocating pump and the valves. By ... | 07/25/1989 |
| 4840205 | Method and apparatus for dispensing liquids A machine for dispensing liquids, especially for filling cartons at a higher rate of speed, is disclosed. The machine includes three bellows arranged in vertical alignment, with upper and lower sleeves interposed between the bellows. The discharge nozzle ... | 06/20/1989 |
| 4818186 | Drive mechanism for disposable fluid infusion pumping cassette A driver for use in an infusion pumping cassette having an elongated valve actuator which operates a valve controlling the flow of fluid through the cassette, a bracket having a first arm pivotally secured to one end of the valve actuator and a second arm... | 04/04/1989 |
| 4776775 | Chemical injector pump The liquid pressure capacity of a chemical injector pump is increased substantially by using high pressure gas to drive the gas motor. In one embodiment, the chemical injector pump includes a liquid pump end, a gas motor end, a low pressure position respo... | 10/11/1988 |
