| Patent Number |
Title Of Patent |
Date Issued |
| 7588426 |
Oil rotary vacuum pump and manufacturing method thereof |
Sep. 15, 2009 |
| 7540726 |
Scroll compressor and method for machining scroll wrap |
Jun. 2, 2009 |
| 7491043 |
Variable displacement pump having a rotating cam ring |
Feb. 17, 2009 |
| 7473081 |
Hermetically sealed compressor and method of manufacturing the same |
Jan. 6, 2009 |
| 7354258 |
Stator for an eccentric single-rotor screw pump and method for its production |
Apr. 8, 2008 |
| 7338266 |
Screw pump and method of operating the same |
Mar. 4, 2008 |
| 7232295 |
Tempering method for a screw-type vacuum pump |
Jun. 19, 2007 |
| 7214045 |
Spherical fluid machine with flow control mechanism |
May. 8, 2007 |
| 7195468 |
Scroll compressor having frame fixing structure and frame fixing method thereof |
Mar. 27, 2007 |
| 7165947 |
Screw compressor capable of manually adjusting both internal volume ratio and capacity and combined screw compressor unit accommodating variation in suction or discharge pressure |
Jan. 23, 2007 |
| 7156922 |
Multi-chamber installation for treating objects under vacuum, method for evacuating said installation and evacuation system therefor |
Jan. 2, 2007 |
| 7114931 |
Rotary pump |
Oct. 3, 2006 |
| 7108493 |
Variable displacement pump having rotating cam ring |
Sep. 19, 2006 |
| 7063523 |
Compressor discharge assembly |
Jun. 20, 2006 |
| 6932588 |
Variable capacity rotary compressor |
Aug. 23, 2005 |
| 6896499 |
Scroll compressor with flow restriction and back pressure chamber tap |
May. 24, 2005 |
| 6887052 |
Scroll wrap tip with abradable selectively applied coating and load-bearing surface |
May. 3, 2005 |
| 6887057 |
Minimal contact seal positive displacement device method and apparatus |
May. 3, 2005 |
| 6872061 |
Method for making a moineau stator and resulting stator |
Mar. 29, 2005 |
| 6860730 |
Methods and apparatus for unloading a screw compressor |
Mar. 1, 2005 |
| 6827562 |
Method of controlling shifting of two-speed motor |
Dec. 7, 2004 |
| 6824367 |
Multi-stage compression type rotary compressor and a setting method of displacement volume ratio for the same |
Nov. 30, 2004 |
| 6821098 |
Screw compressor having compression pockets closed for unequal durations |
Nov. 23, 2004 |
| 6769886 |
Rotary vane pump with vane wear access port and method |
Aug. 3, 2004 |
| 6749404 |
Scroll compressors |
Jun. 15, 2004 |
| 6736622 |
Scroll compressor with offset scroll members |
May. 18, 2004 |
| 6719546 |
Arrangement for controlling the flow of a coolant fluid in a compressor |
Apr. 13, 2004 |
| 6695602 |
Bacterial growth inhibition in a circulation system comprising a compressor |
Feb. 24, 2004 |
| 6679691 |
Anti cavitation system for two-speed motors |
Jan. 20, 2004 |
| 6666666 |
Multi-chamber positive displacement fluid device |
Dec. 23, 2003 |
| 6648617 |
Method and scroll compressor for compressing a compressible medium |
Nov. 18, 2003 |
| 6634873 |
Method for determining engagement surface contours for a rotor of an engine |
Oct. 21, 2003 |
| 6623262 |
Method of reducing system pressure pulsation for positive displacement pumps |
Sep. 23, 2003 |
| 6612820 |
Screw compressor having sealed low and high pressure bearing chambers |
Sep. 2, 2003 |
| 6604923 |
End seal features for scroll compressors |
Aug. 12, 2003 |
| 6599110 |
Scroll-type compressor with lubricant provision |
Jul. 29, 2003 |
| 6565337 |
Method and apparatus for inspecting vanes in a rotary pump |
May. 20, 2003 |
| 6547542 |
Series for compressed air motors with torque which can be theoretically output in a varied manner and a method for producing the individual compressed air motors of said series |
Apr. 15, 2003 |
| 6544017 |
Reverse rotation brake for scroll compressor |
Apr. 8, 2003 |
| 6540493 |
Series for gear pumps with differing capacities and method for manufacturing the individual gear pump of the series |
Apr. 1, 2003 |
| 6537045 |
Rotating machine having lubricant-containing recesses on a bearing surface |
Mar. 25, 2003 |
| 6520758 |
Screw compressor assembly and method including a rotor having a thrust piston |
Feb. 18, 2003 |
| 6517332 |
Scroll compressor with controlled fluid venting to back pressure chamber |
Feb. 11, 2003 |
| 6503070 |
Rotary piston engine having an oil system for lubrication and cooling |
Jan. 7, 2003 |
| 6494695 |
Orbiting scroll center of mass optimization |
Dec. 17, 2002 |
| 6494699 |
Axial unloading lift valve for a compressor and method of making the same |
Dec. 17, 2002 |
| 6478560 |
Parallel module rotary screw compressor and method |
Nov. 12, 2002 |
| 6457958 |
Self compensating adjustable fit progressing cavity pump for oil-well applications with varying temperatures |
Oct. 1, 2002 |
| 6450789 |
Method and apparatus for inspecting vanes in a rotary pump |
Sep. 17, 2002 |
| 6422846 |
Low pressure unloader mechanism |
Jul. 23, 2002 |
