| |
 |
|
Class Information
Number: 417/440
Name: Pumps > Expansible chamber type > Having separate noncyclic valve (e.g., bypass, etc.)
Description: Apparatus provided with valve means other than that necessary for controlling inlet and discharge of pumped fluid to the pump chamber during normal operation of the pump, said valve means being operable to control the flow of pumped fluid to or from the pump chamber or conduit therefor.
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7614386 |
Fuel pump |
Nov. 10, 2009 |
| 7611341 |
Capacity varying type rotary compressor |
Nov. 3, 2009 |
| 7607899 |
Compressor with capacity control |
Oct. 27, 2009 |
| 7553134 |
Switch valve structure of fluid machine |
Jun. 30, 2009 |
| 7540721 |
Automatic inlet check valve release |
Jun. 2, 2009 |
| 7527595 |
Pump provided with exhaust valve device and hemodynamometer incorporating the same |
May. 5, 2009 |
| 7513753 |
Variable capacity scroll compressor |
Apr. 7, 2009 |
| 7497230 |
Priming pump with reed valve |
Mar. 3, 2009 |
| 7481628 |
Diaphragm pump |
Jan. 27, 2009 |
| 7431575 |
Auto valve priming pump |
Oct. 7, 2008 |
| 7377756 |
Rapid exhausting mechanism in pump unit |
May. 27, 2008 |
| RE40344 |
Scroll machine with ported orbiting scroll member |
May. 27, 2008 |
| 7371057 |
Variable capacity scroll compressor |
May. 13, 2008 |
| RE40257 |
Compressor pulse width modulation |
Apr. 22, 2008 |
| 7331773 |
Pump provided with exhaust valve device and hemodynamometer incorporating the same |
Feb. 19, 2008 |
| 7278832 |
Scroll compressor with enlarged vapor injection port area |
Oct. 9, 2007 |
| 7270145 |
unloading/venting valve having integrated therewith a high-pressure protection valve |
Sep. 18, 2007 |
| 7255544 |
Housing including shock valves for use in a gerotor motor |
Aug. 14, 2007 |
| 7226276 |
Multi-stage reciprocating vacuum pump and method of operating the same |
Jun. 5, 2007 |
| 7207787 |
Scroll compressor with backflow-proof mechanism |
Apr. 24, 2007 |
| 7179060 |
Variable discharge pump with two pumping plungers and shared shuttle member |
Feb. 20, 2007 |
| 7175397 |
Effervescent gas bleeder apparatus |
Feb. 13, 2007 |
| 7137789 |
Vent for reducing seal pressure in pump assembly |
Nov. 21, 2006 |
| 7137788 |
Air compressor oil recirculation system |
Nov. 21, 2006 |
| 7134846 |
Radial piston pump with eccentrically driven rolling actuation ring |
Nov. 14, 2006 |
| 7128541 |
Oscillating displacement pump |
Oct. 31, 2006 |
| 7118349 |
High pressure slurry piston pump |
Oct. 10, 2006 |
| 7033143 |
Pumping system with clutch and associated by-pass |
Apr. 25, 2006 |
| 7029248 |
Device for venting a pump unit |
Apr. 18, 2006 |
| 7011507 |
Positive displacement pump with a combined inertance value of the inlet flow path smaller than that of the outlet flow path |
Mar. 14, 2006 |
| 7001160 |
Shoe with inflatable bladder and secure deflation valve |
Feb. 21, 2006 |
| 6981851 |
Piston stroke limiting device for a reciprocating compressor |
Jan. 3, 2006 |
| 6971861 |
High speed unloader for gas compressor |
Dec. 6, 2005 |
| 6953326 |
Air pump having air cylinder/manual dual charging mode |
Oct. 11, 2005 |
| 6945763 |
Geared pump with forced lubricated coupling |
Sep. 20, 2005 |
| 6932588 |
Variable capacity rotary compressor |
Aug. 23, 2005 |
| 6905317 |
Oil pump apparatus |
Jun. 14, 2005 |
| 6893231 |
Hydraulic device |
May. 17, 2005 |
| 6884041 |
Electromagnetic valve-controlled fuel injection pump for internal combustion engines, especially diesel engines |
Apr. 26, 2005 |
| 6877961 |
Vane pump with a bypass valve and passage arrangement for equalizing excess fluid flow through dual suction passages |
Apr. 12, 2005 |
| 6874989 |
Vacuum pump |
Apr. 5, 2005 |
| 6863510 |
Vacuum preventing oil seal for scroll compressor |
Mar. 8, 2005 |
| 6863504 |
Fluid pump relief valve |
Mar. 8, 2005 |
| 6860730 |
Methods and apparatus for unloading a screw compressor |
Mar. 1, 2005 |
| 6860727 |
Air actuated hydraulic pump |
Mar. 1, 2005 |
| 6846166 |
Reciprocating diaphragm pump with degassing valves |
Jan. 25, 2005 |
| 6846162 |
Cylinder housing for air compressor |
Jan. 25, 2005 |
| 6830439 |
Electric fuel pump with universal relief valve installed in the pump inlet |
Dec. 14, 2004 |
| 6823686 |
Pressure equalization system and method |
Nov. 30, 2004 |
| 6821092 |
Capacity modulated scroll compressor |
Nov. 23, 2004 |
|
|
|
