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Class Information
Number: 418/149
Name: Rotary expansible chamber devices > With mechanical sealing > Seal element between stationary cylinder parts
Description: Apparatus provided with means mounted or positioned on a cylinder portion to engage another cylinder portion to oppose the passage of fluid therepast.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7438540 |
Two-stage rotary compressor |
Oct. 21, 2008 |
| 7425121 |
Rotary vane pump |
Sep. 16, 2008 |
| 7416395 |
Sleeve for coupling a refrigerant pipe to a compressor container |
Aug. 26, 2008 |
| 7393192 |
Rotary vane pump |
Jul. 1, 2008 |
| 7381039 |
Rotary compressor having a stepped cover of a discharge muffler chamber |
Jun. 3, 2008 |
| 7314357 |
Seal member for scroll compressors |
Jan. 1, 2008 |
| 7296984 |
Gear pump and liquid injection apparatus |
Nov. 20, 2007 |
| 7214041 |
Seal assemblies |
May. 8, 2007 |
| 7029253 |
Pneumatic tool having a pneumatic cylinder for avoiding failure of bearings |
Apr. 18, 2006 |
| 6902382 |
Gear motor start up control |
Jun. 7, 2005 |
| 6887058 |
Fluid machinery |
May. 3, 2005 |
| 6679690 |
Scroll compressor including guide frame and compliant frame |
Jan. 20, 2004 |
| 6612822 |
Hydraulic motor system |
Sep. 2, 2003 |
| 6572351 |
Pressure seal for a vacuum pump |
Jun. 3, 2003 |
| 6568928 |
Scroll-type compressor |
May. 27, 2003 |
| 6565328 |
Self aligning cartridge pump |
May. 20, 2003 |
| 6413064 |
Pump |
Jul. 2, 2002 |
| 6394775 |
Hydraulic motor seal |
May. 28, 2002 |
| 6257854 |
Double screw rotor assembly having means to automatically adjust the clearance by pressure difference |
Jul. 10, 2001 |
| 6203298 |
Entrapped separator plate for scroll compressor |
Mar. 20, 2001 |
| 6193485 |
Seal structure for casing |
Feb. 27, 2001 |
| 6171087 |
Compressor and its assembling method |
Jan. 9, 2001 |
| 6155808 |
Hydraulic motor plates |
Dec. 5, 2000 |
| 6152715 |
Pressure clamped hydraulic pump |
Nov. 28, 2000 |
| 6079966 |
Compressor housing |
Jun. 27, 2000 |
| 5997268 |
Positive displacement hydraulic machine having a recess receiving a spigot for sealing |
Dec. 7, 1999 |
| 5876192 |
Differential expansion control assembly for a pump |
Mar. 2, 1999 |
| 5791888 |
Static seal for rotary vane cartridge pump assembly |
Aug. 11, 1998 |
| 5660536 |
High capacity simplified sea water pump |
Aug. 26, 1997 |
| 5660538 |
Suction mechanism of a fluid displacement apparatus |
Aug. 26, 1997 |
| 5624248 |
Gerotor motor and improved balancing plate seal therefor |
Apr. 29, 1997 |
| 5447418 |
Scroll-type fluid machine having a sealed back pressure chamber |
Sep. 5, 1995 |
| 5411386 |
Random orbital sander |
May. 2, 1995 |
| 5324184 |
Air motor porting seals |
Jun. 28, 1994 |
| 4934912 |
Sliding-vane rotary compressor with vibration cushioning members |
Jun. 19, 1990 |
| 4913635 |
Scroll type compressor with sealing structure for fixed scroll end plate |
Apr. 3, 1990 |
| 4900238 |
Scroll type compressor with releasably secured hermetic housing |
Feb. 13, 1990 |
| 4850829 |
Transmission pump with improved seal |
Jul. 25, 1989 |
| 4671749 |
Screw compressor |
Jun. 9, 1987 |
| 4514155 |
Rotary vane pump with packing means for the housing components |
Apr. 30, 1985 |
| 4505649 |
Vane pumps |
Mar. 19, 1985 |
| 4492545 |
Cam ring for vane pump |
Jan. 8, 1985 |
| 4460321 |
Axial clearance adjustment mechanism for scroll type fluid displacement apparatus |
Jul. 17, 1984 |
| 4411604 |
Scroll-type fluid displacement apparatus with cup shaped casing |
Oct. 25, 1983 |
| 4408964 |
Vane pump |
Oct. 11, 1983 |
| 4293291 |
Gear pump with improved shaft seal |
Oct. 6, 1981 |
| 4211521 |
Eccentric disc pump |
Jul. 8, 1980 |
| 4182602 |
Leakage prevention means for a positive displacing machine |
Jan. 8, 1980 |
| 4125347 |
Rotary piston engine having reinforced side housings |
Nov. 14, 1978 |
| 4080121 |
Joint sealing for engine housings |
Mar. 21, 1978 |
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