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Class Information
Number: 417/501
Name: Pumps > Expansible chamber type > Pumping member position controlled port > Having coextensive distributor opposite pumping member end face
Description: Apparatus including a distributor positioned in facing relationship with the pumping member end face, the area of the movable portion of the distributor or the movable portion of the valve which seats on the nonmovable portion of the valve being substantially the same as the area of the pumping member end face.

Patents under this class:

Patent Number Title Of Patent Date Issued
8387514 Hydrostatic piston machine with output volume flow in the circumferential direction Mar. 5, 2013
8257065 High pressure lubricant pump for steelworks Sep. 4, 2012
8157548 Supply pump, in particular for supplying diesel fuel, with improved bearing of the drive shaft Apr. 17, 2012
7661936 Piston pump with slot-controlled inlet valve Feb. 16, 2010
7621726 Metering pump Nov. 24, 2009
7374406 System and method for reducing noise in multi-capacity compressors May. 20, 2008
6755630 Apparatus for compressing fluid Jun. 29, 2004
6702557 Valve assembly prohibiting re-expansion of residual fluid Mar. 9, 2004
6190143 Piston pump with zero to negative clearance valve Feb. 20, 2001
6065816 Brake control apparatus for a vehicle May. 23, 2000
5961299 Fluid injector pump with interchangeable reservoir Oct. 5, 1999
5957666 Tandem-type pump having an auxiliary pump Sep. 28, 1999
5921755 Dry vacuum pump Jul. 13, 1999
5897303 Blind pore piston pump with internal valve and stroke limiting spring winding Apr. 27, 1999
5332368 Air compressor having a high pressure output Jul. 26, 1994
5261795 Volumetric pump and process for volumetric pumping Nov. 16, 1993
5058779 Positive displacement piston metering pump Oct. 22, 1991
5020981 Fuel injection pump for internal combustion engines Jun. 4, 1991
4944661 Electro-magnet actuated fuel piston pump Jul. 31, 1990
4934907 Method and apparatus for heating a fuel Jun. 19, 1990
4887955 Unit injector Dec. 19, 1989
4834621 Air throttling valve for submerged pump system May. 30, 1989
4651779 Constant-pressure delivery valve for fuel injection pumps for diesel engines Mar. 24, 1987
4525127 Fluid pump mechanism Jun. 25, 1985
4484866 Piston pump Nov. 27, 1984
4452574 Fuel injection pump Jun. 5, 1984
4427347 Fuel injection pump for internal combustion engines Jan. 24, 1984
4417857 Piston pump Nov. 29, 1983
4127366 Fuel injection pump assembly for diesel engine Nov. 28, 1978
4023916 Cylinder-cylinder head mounting arrangement for diesel-type fuel injection pumps May. 17, 1977
3985474 Hydraulic heads for injection pumps and the injection pumps themselves Oct. 12, 1976
3967698 Oiler for power chain saw Jul. 6, 1976
3945773 Hydraulic heads for injection pumps and the injection pumps themselves Mar. 23, 1976

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