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Class Information
Number: 417/310
Name: Pumps > With condition responsive pumped fluid control > Pressure responsive relief or bypass valve > Rotary expansible chamber pump
Description: Apparatus wherein the pump is of the rotary expansible chamber type.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7618245 |
Fluid machine |
Nov. 17, 2009 |
| 7611345 |
Structure for preventing axial leakage in scroll compressor |
Nov. 3, 2009 |
| 7607902 |
Closed compressor and refrigerating cycle apparatus |
Oct. 27, 2009 |
| 7588011 |
Oil supplying apparatus for engine |
Sep. 15, 2009 |
| 7588431 |
Variable capacity pump/motor |
Sep. 15, 2009 |
| 7585164 |
Backflow preventing apparatus for compressor |
Sep. 8, 2009 |
| 7578663 |
Combined pump with rotodynamic impeller |
Aug. 25, 2009 |
| 7575420 |
Vane pump |
Aug. 18, 2009 |
| 7559750 |
Overheating protection apparatus of scroll compressor |
Jul. 14, 2009 |
| 7553134 |
Switch valve structure of fluid machine |
Jun. 30, 2009 |
| 7547202 |
Scroll compressor with capacity modulation |
Jun. 16, 2009 |
| 7540727 |
Capacity varying type rotary compressor |
Jun. 2, 2009 |
| 7513753 |
Variable capacity scroll compressor |
Apr. 7, 2009 |
| 7488162 |
Hydraulic pump for a power steering system |
Feb. 10, 2009 |
| 7481634 |
Volumetric screw compressor provided with delivery adjustment device |
Jan. 27, 2009 |
| 7442017 |
Displacement type compressor having a self-start synchronous motor and start load reducing means |
Oct. 28, 2008 |
| 7438542 |
Fluid pump assembly |
Oct. 21, 2008 |
| 7422422 |
Compressor assembly with pressure relief valve fittings |
Sep. 9, 2008 |
| 7419365 |
Compressor with capacity control |
Sep. 2, 2008 |
| 7413416 |
Progressing cavity pump |
Aug. 19, 2008 |
| 7410346 |
Oil pump |
Aug. 12, 2008 |
| 7407372 |
Progressing cavity pump or motor |
Aug. 5, 2008 |
| 7399167 |
Fluid machine operable in both pump mode and motor mode and waste heat recovering system having the same |
Jul. 15, 2008 |
| 7393190 |
Discharge valve system of scroll compressor |
Jul. 1, 2008 |
| RE40399 |
Low charge protection vent |
Jun. 24, 2008 |
| 7381037 |
Apparatus for varying capacity of scroll compressor |
Jun. 3, 2008 |
| 7377755 |
Multi-stage rotary compressor |
May. 27, 2008 |
| 7364416 |
Scroll type compressor with an enhanced sealing arrangement |
Apr. 29, 2008 |
| RE40257 |
Compressor pulse width modulation |
Apr. 22, 2008 |
| 7354253 |
Oil pump |
Apr. 8, 2008 |
| 7335004 |
Apparatus for varying capacity in scroll compressor |
Feb. 26, 2008 |
| 7316549 |
Step-type capacity varying apparatus of scroll compressor |
Jan. 8, 2008 |
| 7281912 |
Compressor having a safety device being built in at least one of the screw plugs of the oil-separator |
Oct. 16, 2007 |
| 7281906 |
Oil pump for automatic transmission |
Oct. 16, 2007 |
| 7278832 |
Scroll compressor with enlarged vapor injection port area |
Oct. 9, 2007 |
| 7214036 |
Screw type vacuum pump |
May. 8, 2007 |
| 7207782 |
Vacuum pump |
Apr. 24, 2007 |
| 7207787 |
Scroll compressor with backflow-proof mechanism |
Apr. 24, 2007 |
| 7189067 |
Scroll compressor having vacuum preventing structure |
Mar. 13, 2007 |
| 7179070 |
Variable capacity pump/motor |
Feb. 20, 2007 |
| 7165949 |
Cavitation noise reduction system for a rotary screw vacuum pump |
Jan. 23, 2007 |
| 7165954 |
Apparatus for preventing vacuum state in scroll compressor |
Jan. 23, 2007 |
| 7156623 |
Electric oil pump apparatus |
Jan. 2, 2007 |
| 7137789 |
Vent for reducing seal pressure in pump assembly |
Nov. 21, 2006 |
| 7094038 |
Vacuum preventing device for scroll compressor |
Aug. 22, 2006 |
| 7070399 |
Variable displacement pump with a suction area groove for pushing out rotor vanes |
Jul. 4, 2006 |
| 7070396 |
Oil pump apparatus having oil drain |
Jul. 4, 2006 |
| 7059838 |
Control device for positive displacement pumps |
Jun. 13, 2006 |
| 7055489 |
Engine unit case |
Jun. 6, 2006 |
| 7052255 |
Apparatus for changing capacity of scroll compressor with movable seal member |
May. 30, 2006 |
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