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 |
| 8096788 | Pump having adjustable pumping pressures A pump having adjustable pumping pressures includes a tube, first and second chambers and a channel extending from the first end to the second end of the tube, and an orifice extending through the tube and opening to the channel. A base connected to the second end o... | 01/17/2012 |
| 8025491 | Air pump having selectable low pressure and high pressure mode An air pump, including: two cylinders, a big one and a small one, which are telescopically fitted to each other. A head connects with the outlet end of the small cylinder. A pressure relief valve connects with the outlet end of the big cylinder. A first piston is fi... | 09/27/2011 |
| 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 |
| 6702556 | Multi-cylinder compression pump The invention concerns a pump for compression of gases, such as air, of the type comprising a first cylinder and a second cylinder, a piston dividing said first cylinder into a first chamber located ahead of the piston and a second chamber located behind ... | 03/09/2004 |
| 6695595 | Pump for pumping at two pressures A pump includes a cylinder, a piston assembly, a first nozzle, a valve, a controller, a ring and a second nozzle. The cylinder defines first and second chambers and first and second channels for communication between the chambers. The piston assembly is r... | 02/24/2004 |
| 6676390 | Manual air pump incorporating a foot switch in the base member A manual air pump with a handle includes a base member, a foot switch, an outlet cylinder, an inner cylinder and a pumping assembly. The foot switch is mounted on the base member. The outlet cylinder is mounted vertically on the base member. The inner cyl... | 01/13/2004 |
| 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 |
| 6428290 | Air pump An air pump comprises an outer tube, a distribution guide tube, and a spring. The outer tube is provided in the interior with a large cylinder and a small cylinder. The distribution guide tube is disposed at the lower end of the outer tube and is provided... | 08/06/2002 |
| 6371741 | Manual air pump having at least two selectable inflation modes A manual air pump includes an outer cylinder having a first chamber and a head provided to the second end of the outer cylinder. The head includes an outlet passage communicated with the first chamber for supplying air to an object to be inflated. An inne... | 04/16/2002 |
| 6364639 | Pump A lance pump, particularly for lubricant, having a fixed plunger and a pump tube reciprocable in cycles through an outward stroke and an inward stroke on each cycle on the plunger, operable to deliver metered charges of lubricant on each outward stroke as... | 04/02/2002 |
| 6319410 | Apparatus and method for super critical fluid extraction To provide performance particularly in handling supercritical extraction systems, a specially designed pump includes a cam-driven, single-plunger with a cam having a profile that enables the pumping system to avoid destructive reverse torque on the cam, g... | 11/20/2001 |
| 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 |
| 6102676 | Pump A lance pump, particularly for lubricant, having a fixed plunger and a pump tube reciprocable in cycles through a downstroke and an upstroke on each cycle on the plunger, operable to deliver metered charges of lubricant on each downstroke as well as on ea... | 08/15/2000 |
| 6027319 | Compact manual air pump having selectable high volume and high pressure modes A pump comprises a pair of coaxial pistons, one slidably positioned in the other for simultaneous compression causing similarly directed air flow, independent passages and valves for permitting air flow from each piston into the pump head for increased ai... | 02/22/2000 |
| 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 |
| 5353870 | Well purging and sampling pump The disclosed well purging and sampling pump has a hydraulically actuated rim driven cylindrical pumping piston assisted by an internal precharged gas return spring all mounted coaxially within a pump housing cylinder suitable for being lowered into and s... | 10/11/1994 |
| 4738599 | Well pump A well pump, for pumping well fluid up a tubing string, the pump having inner and outer housings, inner and outer barrels, and upper and lower valves. A hydraulic fluid line extends downward through the casing, outside of the tubing string, from the surfa... | 04/19/1988 |
| 4599053 | Displacement pump for abrasive and difficult to pump fluids A displacement pump intended in particular for wearing and difficult to pump fluids such as concrete. It consists of a pump chamber (22) formed from a first tubular slide component (2) and a second similarly tubular slide component (4), with the second sl... | 07/08/1986 |
| 4357798 | Rapid actuating device of hydraulic actuator Discussed herein is a rapid actuating device for a hydraulic actuator utilizing two or more relief valves to control the hydraulic flow of the actuator for various loading or no loading conditions in order to speed up the required operation time.... | 11/09/1982 |
| 4126132 | Intravenous and intra arterial delivery system An intravenous and intra arterial delivery system is described having a disposable cassette actuated by a pump and control electronics for providing positive but variable delivery rates. The cassette is self-priming and provides protection against the del... | 11/21/1978 |
