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Class Information
Number: 417/299
Name: Pumps > With condition responsive pumped fluid control > Normally open bypass or relief passage closed by increased pressure or flow
Description: Apparatus in which there is a bypass or relief line controlled by the fluid flow control means, the bypass or relief line being normally open to permit flow therethrough and the control means operating to close the line when the flow rate through the pump or the pressure generated by the pump increases above a minimum value.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7451780 |
Multifunction valve for use in a hydraulic component |
Nov. 18, 2008 |
| RE40257 |
Compressor pulse width modulation |
Apr. 22, 2008 |
| 7334597 |
Liquid/vapor bypass valve |
Feb. 26, 2008 |
| 7165949 |
Cavitation noise reduction system for a rotary screw vacuum pump |
Jan. 23, 2007 |
| 7125228 |
Pressure washer having oilless high pressure pump |
Oct. 24, 2006 |
| 6866486 |
Pressure washer having oilless high pressure pump |
Mar. 15, 2005 |
| 6837692 |
Self-priming centrifugal pump with internal series of diffusers and impellers and laminar valve |
Jan. 4, 2005 |
| 6823686 |
Pressure equalization system and method |
Nov. 30, 2004 |
| 6779987 |
Pressure washer having oilless high pressure pump |
Aug. 24, 2004 |
| 6769880 |
Pressure blowdown system for oil injected rotary screw air compressor |
Aug. 3, 2004 |
| 6715999 |
Variable-capacity scroll-type compressor |
Apr. 6, 2004 |
| 6698446 |
Check valve |
Mar. 2, 2004 |
| 6679683 |
Dual volume-ratio scroll machine |
Jan. 20, 2004 |
| 6663358 |
Compressors for providing automatic capacity modulation and heat exchanging system including the same |
Dec. 16, 2003 |
| 6641372 |
Dual discharge hydraulic pump and system therefor |
Nov. 4, 2003 |
| 6619934 |
Scroll compressor with motor control for capacity modulation |
Sep. 16, 2003 |
| 6584791 |
Pressure equalization system and method |
Jul. 1, 2003 |
| 6551069 |
Compressor with a capacity modulation system utilizing a re-expansion chamber |
Apr. 22, 2003 |
| 6431844 |
High pressure pump having integral start valve |
Aug. 13, 2002 |
| 6296456 |
Positive displacement pump systems with a variable control orifice |
Oct. 2, 2001 |
| 6238191 |
Apparatus for supplying a fuel by means of a fuel supply unit arranged in a housing |
May. 29, 2001 |
| 6213731 |
Compressor pulse width modulation |
Apr. 10, 2001 |
| 6176685 |
Scroll compressor in which communication is controlled between adjacent compression spaces |
Jan. 23, 2001 |
| 6171071 |
Water pump having water cooling device |
Jan. 9, 2001 |
| 6168390 |
Dosing pump for dosed liquid conveyance |
Jan. 2, 2001 |
| 6139287 |
Scroll type fluid machine |
Oct. 31, 2000 |
| 6123517 |
Scroll machine with capacity modulation |
Sep. 26, 2000 |
| 6070880 |
System for lubricating mechanical seals |
Jun. 6, 2000 |
| 6022197 |
Aircraft pump system with internal pressure control, comprising a regenerative pump and a centrifugal pump |
Feb. 8, 2000 |
| 5988989 |
Compact hydraulic power unit having a reservoir closed by a manifold having a hydraulic circuit |
Nov. 23, 1999 |
| 5911562 |
High pressure fluid delivery system with automatic priming valve |
Jun. 15, 1999 |
| 5775882 |
Multicylinder rotary compressor |
Jul. 7, 1998 |
| 5718255 |
Flow-responsive diverting valve |
Feb. 17, 1998 |
| 5692680 |
Fuel supply unit for an oil burner |
Dec. 2, 1997 |
| 5678985 |
Scroll machine with capacity modulation |
Oct. 21, 1997 |
| 5639225 |
Scroll type compressor |
Jun. 17, 1997 |
| 5601111 |
Method for automatically circulating and then halting circulation of wastewater in a wastewater pump station, and a valving device therefore |
Feb. 11, 1997 |
| 5513959 |
Valve for pump with priming circuit |
May. 7, 1996 |
| 5467595 |
Valve means |
Nov. 21, 1995 |
| 5425625 |
Car-used electric fuel pump |
Jun. 20, 1995 |
| 5409032 |
Pressure washer bypass valve |
Apr. 25, 1995 |
| 5397219 |
Integral liquid pump and drainback valve |
Mar. 14, 1995 |
| 5362207 |
Portable diesel-driven centrifugal air compressor |
Nov. 8, 1994 |
| 5348450 |
Bootstrap method of loading a compressor having a spring loaded blowoff valve |
Sep. 20, 1994 |
| 5336058 |
Scroll-type compressor with variable displacement mechanism |
Aug. 9, 1994 |
| 5333638 |
Automatic recirculation valve |
Aug. 2, 1994 |
| 5240388 |
Scroll type compressor with variable displacement mechanism |
Aug. 31, 1993 |
| 5226802 |
Variable-displacement vane pump |
Jul. 13, 1993 |
| 5215444 |
System for controlling oil viscosity and cleanliness |
Jun. 1, 1993 |
| 5201189 |
Refrigerant compressor with an initial seizure prevention means |
Apr. 13, 1993 |
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