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Class Information
Number: 418/6
Name: Rotary expansible chamber devices > Multistage > One working chamber stage encircles another
Description: Apparatus wherein a working chamber surrounds another working chamber with which it is in working fluid series flow relationship.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7419371 |
Scroll fluid machine |
Sep. 2, 2008 |
| 7364417 |
Compression unit of orbiting vane compressor |
Apr. 29, 2008 |
| 7086844 |
Multi-stage scroll fluid machine having a set a seal elements between compression sections |
Aug. 8, 2006 |
| 7001161 |
Scroll fluid machine |
Feb. 21, 2006 |
| 6922999 |
Single-winding multi-stage scroll expander |
Aug. 2, 2005 |
| 6764288 |
Two stage scroll vacuum pump |
Jul. 20, 2004 |
| 6736620 |
Scroll-type fluid machine having at least one inlet or outlet of a plurality able to be closed by a closure member |
May. 18, 2004 |
| 6682328 |
Multi-stage scroll fluid machine having a seal element between compression sections |
Jan. 27, 2004 |
| 6658866 |
Scroll expressor |
Dec. 9, 2003 |
| 6659743 |
Scroll fluid machine having multistage compressing part |
Dec. 9, 2003 |
| 6607371 |
Pneudraulic rotary pump and motor |
Aug. 19, 2003 |
| 6425744 |
Helical blade type compressor having a helical blade in a stationary cylinder |
Jul. 30, 2002 |
| 6203301 |
Fluid pump |
Mar. 20, 2001 |
| 6089830 |
Multi-stage compressor with continuous capacity control |
Jul. 18, 2000 |
| 6079952 |
Continuous capacity control for a multi-stage compressor |
Jun. 27, 2000 |
| 6050792 |
Multi-stage scroll compressor |
Apr. 18, 2000 |
| 5871342 |
Variable capacity rolling piston compressor |
Feb. 16, 1999 |
| 5855474 |
Multiple purpose two stage rotating vane device |
Jan. 5, 1999 |
| 5626469 |
Scroll apparatus |
May. 6, 1997 |
| 5597295 |
Multi-chamber rotary fluid machine with at least two ring members carrying vanes |
Jan. 28, 1997 |
| 5472327 |
Rotary compressor with improved fluid inlet porting |
Dec. 5, 1995 |
| 5399076 |
Rolling piston compressor |
Mar. 21, 1995 |
| 5375985 |
Multi-chamber rotary fluid machine having at least two vane carrying ring members |
Dec. 27, 1994 |
| 5370511 |
Clutch apparatus for a rotary compressor |
Dec. 6, 1994 |
| 5346374 |
Rotating spiral pump with cooling between radial steps |
Sep. 13, 1994 |
| 5284426 |
Rotary compressor with multiple compressor stages and pumping capacity control |
Feb. 8, 1994 |
| 5135368 |
Multiple stage orbiting ring rotary compressor |
Aug. 4, 1992 |
| 5015161 |
Multiple stage orbiting ring rotary compressor |
May. 14, 1991 |
| 4902209 |
Sliding segment rotary fluid power translation device |
Feb. 20, 1990 |
| 4867652 |
Balanced rolling rotor motor compressor |
Sep. 19, 1989 |
| 4793138 |
Hydrostatic drive with radially-nested radial-roller pump and motor having common displacement control ring |
Dec. 27, 1988 |
| 4552107 |
Rotary internal combustion engine |
Nov. 12, 1985 |
| 4531899 |
Positive displacement rotary gas compressor pump |
Jul. 30, 1985 |
| 4235572 |
Rotary displacement pump with intake through a first sealing slide |
Nov. 25, 1980 |
| 4157234 |
Scroll-type two stage positive fluid displacement apparatus |
Jun. 5, 1979 |
| 4141677 |
Scroll-type two stage positive fluid-displacement apparatus with intercooler |
Feb. 27, 1979 |
| 3977369 |
Orbital displacers |
Aug. 31, 1976 |
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