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Class Information
Number: 417/570
Name: Pumps > Expansible chamber type > Having pumping chamber pressure responsive distributor > Distributor positioned opposite pumping member end face > Distributor coextensive with pumping member end face
Description: Apparatus in which the movable portion of the valve or the movable portion of the valve which seats upon the nonmovable portion of the valve is substantially the same area as the end face of the pumping member.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7390174 |
Piston pump |
Jun. 24, 2008 |
| 7381035 |
Piston pump with check shaft |
Jun. 3, 2008 |
| 7281911 |
Linear compressor |
Oct. 16, 2007 |
| 7179065 |
Linear compressor |
Feb. 20, 2007 |
| 7163384 |
Reciprocating compressor with a linear motor |
Jan. 16, 2007 |
| 7118352 |
Hydraulic metering device |
Oct. 10, 2006 |
| 7056106 |
Discharge valve apparatus for reciprocating compressor |
Jun. 6, 2006 |
| 7048521 |
High pressure fuel supply pump with an intake valve member and a discharge valve member aligned along a plunger axis |
May. 23, 2006 |
| 7021911 |
Reverse-ported pump |
Apr. 4, 2006 |
| 6902381 |
Cylinder head for reciprocating compressor |
Jun. 7, 2005 |
| 6884045 |
Hydraulically powered diaphragm pump with pretensioned diaphragm |
Apr. 26, 2005 |
| 6783337 |
Check valve seal assembly |
Aug. 31, 2004 |
| 6764286 |
Piston pump with pump inlet check valve |
Jul. 20, 2004 |
| 6736613 |
Acceleration fuel pump having a resilient check valve member for a combustion engine carburetor |
May. 18, 2004 |
| 6702557 |
Valve assembly prohibiting re-expansion of residual fluid |
Mar. 9, 2004 |
| 6517330 |
Reciprocating pump |
Feb. 11, 2003 |
| 6450787 |
Piston pump |
Sep. 17, 2002 |
| 6450788 |
Piston pump for high-pressure fuel delivery |
Sep. 17, 2002 |
| 6322328 |
Radial piston pump |
Nov. 27, 2001 |
| 6264439 |
Low power electromagnetic pump |
Jul. 24, 2001 |
| 6241491 |
Device for supplying an apportioned minimum amount of fluid |
Jun. 5, 2001 |
| 6190143 |
Piston pump with zero to negative clearance valve |
Feb. 20, 2001 |
| 6152710 |
Discharge valve system for linear compressor |
Nov. 28, 2000 |
| 6071097 |
Single-piece piston for use in a pneumatically-activated pump |
Jun. 6, 2000 |
| 5984652 |
Single-piece piston with central bore for use in a pneumatically-activated pump |
Nov. 16, 1999 |
| 5947708 |
Axial flow valve system for linear compressor |
Sep. 7, 1999 |
| 5921755 |
Dry vacuum pump |
Jul. 13, 1999 |
| 5897304 |
Flow-through vertical filling pump with a plurality of diaphragms |
Apr. 27, 1999 |
| 5860798 |
Pump for pumping a fluid comprising a liquefied gas and apparatus having a pump |
Jan. 19, 1999 |
| 5802849 |
Actuating device for coupling of an automatic transmission of a vehicle |
Sep. 8, 1998 |
| 5713723 |
Volumetric hand pump |
Feb. 3, 1998 |
| 5591012 |
Conveying pump for supply containers of various heights |
Jan. 7, 1997 |
| 5584676 |
Compressor discharge valve having a guided spherical head |
Dec. 17, 1996 |
| 5554008 |
High-pressure pump to feed internal-combustion engine fuel-injections |
Sep. 10, 1996 |
| 5549453 |
Reciprocating-piston-type compressor having piston entering discharge chamber |
Aug. 27, 1996 |
| 5535926 |
Apparatus for applying mastic to a selected surface |
Jul. 16, 1996 |
| 5390700 |
Automatic valve |
Feb. 21, 1995 |
| 5266015 |
Compressor suction and discharge valve assembly |
Nov. 30, 1993 |
| 5257918 |
Fuel injection pump with a conical transition outlet area |
Nov. 2, 1993 |
| 5232354 |
Compressor discharge valve assembly having plural wave ring biasing means |
Aug. 3, 1993 |
| 5226796 |
Valve assembly in a piston type compressor |
Jul. 13, 1993 |
| 5207567 |
Pump with integral sump |
May. 4, 1993 |
| 5174735 |
Low reexpansion valve system |
Dec. 29, 1992 |
| 5152678 |
Fluid sampling pump |
Oct. 6, 1992 |
| 5073096 |
Front-discharge fluid end for reciprocating pump |
Dec. 17, 1991 |
| 5058779 |
Positive displacement piston metering pump |
Oct. 22, 1991 |
| 5020981 |
Fuel injection pump for internal combustion engines |
Jun. 4, 1991 |
| 5011383 |
Valve assembly, for use in combination with a straight-cylinder, gas-compression chamber, and in combination therewith |
Apr. 30, 1991 |
| 4921409 |
High pressure reciprocating pump |
May. 1, 1990 |
| 4887955 |
Unit injector |
Dec. 19, 1989 |
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