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Class Information
Number: 417/498
Name: Pumps > Expansible chamber type > Pumping member position controlled port > Longitudinally spaced inlet and discharge sidewall ports
Description: Apparatus comprising one port for providing inlet of pump fluid to the pump chamber and another port for providing discharge of pump fluid therefrom, each of said ports being formed in a pump chamber sidewall portion and longitudinally spaced from each other, said ports individually providing the sole path for inlet and discharge of pump fluid and being controlled by the covering or uncovering thereof by the pumping member or element carried thereby.

Patents under this class:

Patent Number Title Of Patent Date Issued
8702405 Twisting translational displacement pump cartridge Apr. 22, 2014
8241019 Pump element and pump having such a pump element Aug. 14, 2012
8197237 Metering pump and drive device thereof Jun. 12, 2012
7544051 Cam-driven fluid pump Jun. 9, 2009
6719542 Pump for printing press Apr. 13, 2004
6354820 Pump Mar. 12, 2002
6179574 Apparatus for pressurizing fluids and using them to perform work Jan. 30, 2001
6004117 Displacement pump Dec. 21, 1999
5741126 Valveless metering pump with crisscrossed passage ways in the piston Apr. 21, 1998
5613839 Variable rate pump Mar. 25, 1997
5356114 Traveling valve for sucker rod pump Oct. 18, 1994
5136931 Rotary type fluid energy convertor Aug. 11, 1992
5067881 Plunger-operated hydraulic pump Nov. 26, 1991
5058779 Positive displacement piston metering pump Oct. 22, 1991
5024587 Valveless pump Jun. 18, 1991
4975030 Fuel injection pump for internal combustion engines Dec. 4, 1990
4834032 Two-stroke cycle engine and pump having three-stroke cycle effect May. 30, 1989
4834218 Lubricating nozzle apparatus and method May. 30, 1989
4770081 Servomechanism with idle gear feedback Sep. 13, 1988
4674659 Universal sequential dispensing pump system Jun. 23, 1987
4632647 Side entry down hole pump for oil wells Dec. 30, 1986
4619593 Apparatus comprising a turbine and associated water extractor and method of translating the potential energy of deep sea water into useful work Oct. 28, 1986
4560327 Porting and ducting arrangement Dec. 24, 1985
4541789 Fuel injection pump for internal combustion engines Sep. 17, 1985
4493440 Wall-mounted soap dispenser Jan. 15, 1985
4484866 Piston pump Nov. 27, 1984
4416596 Fluid-transfer system and method Nov. 22, 1983
4315582 Universal sequential dispensing pump system free of external check valves and having venting capability Feb. 16, 1982
4259040 Fuel injection pump for air-compressing fuel-injected internal combustion engine Mar. 31, 1981
4178141 Fuel injection pump for air-compressing injection internal combustion engines Dec. 11, 1979
4165824 Self cleaning shampoo dispenser Aug. 28, 1979
3938425 Pump stroke adjustment device Feb. 17, 1976

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