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Class Information
Number: 418/87
Name: Rotary expansible chamber devices > Heat exchange or non-working fluid lubricating or sealing > Valve regulated non-working fluid
Description: Apparatus in which the flow of nonworking fluid to the relatively moving surfaces may be varied by the adjustment of a movable flow restrictive means in the path of flow.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7547203 |
Screw compressor |
Jun. 16, 2009 |
| 7481634 |
Volumetric screw compressor provided with delivery adjustment device |
Jan. 27, 2009 |
| RE40344 |
Scroll machine with ported orbiting scroll member |
May. 27, 2008 |
| 7232295 |
Tempering method for a screw-type vacuum pump |
Jun. 19, 2007 |
| 7201569 |
Screw compressor |
Apr. 10, 2007 |
| 7052249 |
Air/oil separating tank--thermostatic valve--minimum pressure valve--oil cooling radiator--compressed air cooling radiator group |
May. 30, 2006 |
| 6866490 |
Water-injected screw compressor |
Mar. 15, 2005 |
| 6739853 |
Compact control mechanism for axial motion control valves in helical screw compressors |
May. 25, 2004 |
| 6719546 |
Arrangement for controlling the flow of a coolant fluid in a compressor |
Apr. 13, 2004 |
| 6701220 |
Industrial robot device |
Mar. 2, 2004 |
| 6616431 |
Scroll-type compressors |
Sep. 9, 2003 |
| 6612820 |
Screw compressor having sealed low and high pressure bearing chambers |
Sep. 2, 2003 |
| 6575720 |
Bearing and shaft cooling device |
Jun. 10, 2003 |
| 6494696 |
Scroll compressor |
Dec. 17, 2002 |
| 6409489 |
Compressor installation with water-injected compressor element |
Jun. 25, 2002 |
| 6375443 |
Screw rotor type wet vacuum pump |
Apr. 23, 2002 |
| 6350111 |
Scroll machine with ported orbiting scroll member |
Feb. 26, 2002 |
| 6315535 |
Screw vacuum pump having valve controlled cooling chambers |
Nov. 13, 2001 |
| 6174148 |
Water jet type air compressor system, its starting method, and water quality control method thereof |
Jan. 16, 2001 |
| 6129532 |
CO.sub.2 compressor |
Oct. 10, 2000 |
| 6102683 |
Compressor installation having water injection and a water treatment device |
Aug. 15, 2000 |
| 5954482 |
Compressor having pressure eliminating means |
Sep. 21, 1999 |
| 5871338 |
Vacuum pump with a gas ballast device |
Feb. 16, 1999 |
| 5769617 |
Vane-type compressor exhibiting efficiency improvements and low fabrication cost |
Jun. 23, 1998 |
| 5697771 |
Vacuum pump with oil separator |
Dec. 16, 1997 |
| 5678986 |
Fluid displacement apparatus with lubricating mechanism |
Oct. 21, 1997 |
| 5573387 |
Vacuum pumps |
Nov. 12, 1996 |
| 5341658 |
Fail safe mechanical oil shutoff arrangement for screw compressor |
Aug. 30, 1994 |
| 5263832 |
Air-cooled oil-free screw compressor |
Nov. 23, 1993 |
| 5253988 |
Gear pump |
Oct. 19, 1993 |
| 5221199 |
Lubrication oil volume control device in a scroll type compressor |
Jun. 22, 1993 |
| 5201648 |
Screw compressor mechanical oil shutoff arrangement |
Apr. 13, 1993 |
| 5181414 |
Pumping apparatus for pumping a gas by means of an oil-sealed vane pump and application to helium leak detectors |
Jan. 26, 1993 |
| 5174741 |
Liquid injecting type oil-free screw compressor |
Dec. 29, 1992 |
| 5174740 |
Hermetic type scroll compressor with regulation of lubricant to the inlet |
Dec. 29, 1992 |
| 5066202 |
Method and apparatus for delivering oil to a multi-stage pump |
Nov. 19, 1991 |
| 5064452 |
Gas removable pump for liquid |
Nov. 12, 1991 |
| 5033944 |
Lubricant circuit for a compressor unit and process of circulating lubricant |
Jul. 23, 1991 |
| 4995797 |
Rotary screw vacuum pump with pressure controlled valve for lubrication/sealing fluid |
Feb. 26, 1991 |
| 4984974 |
Screw type vacuum pump with introduced inert gas |
Jan. 15, 1991 |
| 4983106 |
Rotary screw machine with multiple chambers in casing for lubrication-coding fluid |
Jan. 8, 1991 |
| 4940400 |
Lubrication system for a rotary-piston internal combustion engine |
Jul. 10, 1990 |
| 4936761 |
Vane backpressure providing apparatus for sliding vane type compressor |
Jun. 26, 1990 |
| 4795325 |
Compressor of rotary vane type |
Jan. 3, 1989 |
| 4776778 |
Refrigerant compressor with shaft bearing having improved wear resistance |
Oct. 11, 1988 |
| 4743184 |
Rotary compressor with heating passage between discharge chamber and shaft seal |
May. 10, 1988 |
| 4743183 |
Rotary vane compressor with discharge fluid to front and rear shaft bearings and vane slats |
May. 10, 1988 |
| 4720250 |
Regulator for cooling or heat pump systems |
Jan. 19, 1988 |
| 4671748 |
Compressor unit for the production of compressed air |
Jun. 9, 1987 |
| 4648815 |
Rotary air compressor with thermally responsive oil injection |
Mar. 10, 1987 |
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