Did You Know...
...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7410012 | Hydraulic automatic boosting pump A hydraulic automatically-pressurizing pump comprises an intermediate fastening connector, a reversing valve, a mechanically-controlled automatic direction-reversing device, a power cylinder, a pressurizing cylinder and an ultrahigh-pressure connecting tube which ar... | 08/12/2008 |
| 7331773 | Pump provided with exhaust valve device and hemodynamometer incorporating the same A diaphragm is provided in a pump case so as to define a pump chamber communicated with an external member having an air chamber. A motor actuates the diaphragm to introduce air into the pump chamber and to supply the introduced air to the air chamber. An exhaust va... | 02/19/2008 |
| 7278836 | Metering pump A metering pump that is capable of delivering a constant, rate of fluid over a wide range of viscosities at infinitely variable delivery rates. Two identical pumping chambers are provided with one operating in the suction mode, and the other in the discharge mode wi... | 10/09/2007 |
| 7252486 | Hand-operated inflator A hand-operated inflator with dual cylinder is provided. Once the cylinders are pulled out on two sides of the central block to form a line axially, and a clamp plate at mid point in between the two cylinders is turned to the transversal position to lock the cylinde... | 08/07/2007 |
| 7179060 | Variable discharge pump with two pumping plungers and shared shuttle member The present invention relates generally to variable discharge pumps, and specifically pumps used in fuel injection systems. Typically, such pumps include a dedicated spill control valve for each pumping plunger, that also doubles as an avenue for refilling the pumpi... | 02/20/2007 |
| 7131820 | Method for controlling a thick matter pump A method for controlling a thick matter pump comprising two delivery cylinders (10) emerging, via two openings (12), into a material reservoir (14), associated with two delivery pistons (26), symmetrically synchronized relative to said cy... | 11/07/2006 |
| 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 |
| 7040876 | Valves for a diaphragm pump A pump which has a diaphragm main body integrally connected at a planar portion to a diaphragm portion forming a pump chamber and performs a pumping action by reciprocating a driving portion disposed integrally with the diaphragm portion; the pump being configured c... | 05/09/2006 |
| 6935850 | Axially aligned dual piston cylinder air pump with a common head portion A dual-direction pump includes two cylinders arranged on opposite sides of a head portion and an inlet return-flow prevention device and a leakproof device mounted between the cylinder and the head portion for avoiding leakage at the juncture between the cylinder an... | 08/30/2005 |
| 6604920 | Vibratory pump A vibratory pump includes an oscillator that is connected to a plunger mounted within a housing submerged beneath the surface of a fluid to be displaced. The oscillations of the plunger selectively communicate an outlet for the pump with inlet openings on... | 08/12/2003 |
| 6450779 | Two-cylinder thick matter pump A two-cylinder thick-matter pump for continuous delivery of thick matter is characterized in that a reversing valve (5) has a diverter housing (8, 8') with at least four openings (a-b), the diverter (6, 6') disposed in the diverter housing (8, 8') is swiv... | 09/17/2002 |
| 6447259 | Pressure energy recovery device An energy recovery device includes at least one cylinder, a piston slidable in the cylinder, a first valve for selectively connecting one end of the cylinder to waste liquid at a first relatively high pressure and to drain and a second valve for allowing ... | 09/10/2002 |
| 6416298 | Radial piston pump The radial piston pump has a number of cylinder bores in a pump housing to accommodate pistons which slide into them; the cylinder bores are plugged by pressed-in stoppers (3) in which pressure channels are incorporated, all stoppers being sealed by a fla... | 07/09/2002 |
| 6264442 | High volume positive displacement pump with gear driven rotary valves A positive displacement pump for gases includes a pair of pistons operating out of phase. Each of the pistons is associated with a plurality of rotary inlet valves disposed along the sidewalls of the piston cylinders. A rotary outlet valve is also associa... | 07/24/2001 |
| 6120265 | Two-stroke operable pump A pump includes a main body, an inner tube mounted in the main body, and a hollow piston slidably mounted in the main body and partially receiving the inner tube. A piston is mounted in the main body and slidable along the inner tube. Two O-rings are moun... | 09/19/2000 |
| 6071096 | Pneumatic cylinder, in particular for actuating fume extraction valves in fume and heat extraction plants A pneumatic cylinder for actuating fume extraction valves in fume and heat extraction plants has a piston (2) that may be actuated from both sides with at least one working surface and that can be made to slide by pressurised air in a cylinder (1) with at... | 06/06/2000 |
| 6050791 | Structure for connecting a head to a non-circular cylinder of a bicycle tire pump A bicycle tire pump includes a cylinder having two passages defined therethrough which are separated by a board, two openings respectively defined in a top of the cylinder and communicating with the two passages into which two pistons are respectively and... | 04/18/2000 |
| 5759018 | Device for creating pressure The invention relates to a device 1 for creating pressure, especially for use as an air pump or a standing compressor, with a stepped housing which is provided with at least one valve connection and whereby a first 8 and a second pressure chamber 61, 62 f... | 06/02/1998 |
| 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 |
| 5538403 | High pressure pump for fuel injection systems A variable displacement high pressure pump for pumping fluid at a high pressure to an accumulation chamber is disclosed including a low pressure supply pump for supplying fluid at a low pressure, a first high pressure pumping unit for receiving the low pr... | 07/23/1996 |
| 5163822 | Radial piston pump A radial piston pump has a pump body with two pump chambers lying in a straight line. In the pump chambers pistons reciprocate along this same straight line. The pump pistons are coupled to an actuator which is rotatable about an axis which bisects the st... | 11/17/1992 |
| 4880365 | Cement pump with removable discharge chamber cartridge A double acting concrete pump includes a pair of pump cylinders with a piston slidable back and forth in each cylinder, the pistons being driven in opposite directions, a connecting manifold connecting each of the cylinder outlets to a source of cement vi... | 11/14/1989 |
| 4634352 | Cement pump with valve manifold control A pump for applying pre-mixed cement, and similar mud-like flowable materials, employs power driven oppositely reciprocating pistons sliding in a pair of cylinders for pumping action. A control manifold, having a single cement discharge outlet, interconne... | 01/06/1987 |
| 4427348 | Duplex hydraulic and air oil well pump A pump (10) is disclosed for use in pumping a fluid (14) from a borehole (12) to the surface. The pump includes a first and second pumping string (20, 22) extending into the borehole and a return string (26) extending from the borehole. First and second p... | 01/24/1984 |
| 4427192 | Dispenser vacuum system Automatic terminal machines for banking transactions utilize a document dispenser for delivering bank notes to a customer. The document dispenser moves the bank notes from a storage bin by means of a picker mechanism that moves along a path profile establ... | 01/24/1984 |
