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Class Information
Number: 418/150
Name: Rotary expansible chamber devices > Working chamber surface expressed mathematically
Description: Apparatus in which either the cylinder or working member surface forming part of the expansible working chamber is represented in a claim by a mathematical formula or equation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7594323 |
Methods for designing single-lobe and double-lobe rotors |
Sep. 29, 2009 |
| 7588429 |
Oil pump rotor assembly |
Sep. 15, 2009 |
| 7572118 |
Rotary machine with orbiting twin blades, especially for expansion drive units and compressors |
Aug. 11, 2009 |
| 7565742 |
Methods for designing lobe-type rotors |
Jul. 28, 2009 |
| 7565741 |
Methods for designing lobe-type rotors |
Jul. 28, 2009 |
| 7562450 |
Methods for designing single-lobe rotors |
Jul. 21, 2009 |
| 7553143 |
Lobe pump system and method of manufacture |
Jun. 30, 2009 |
| 7520738 |
Closed system rotary machine |
Apr. 21, 2009 |
| 7513761 |
Double screw compressor for supplying gas |
Apr. 7, 2009 |
| 7476093 |
Oil pump rotor assembly |
Jan. 13, 2009 |
| 7458791 |
Rotary working machine provided with an assembly of working chambers with periodically variable volume, in particular a compressor |
Dec. 2, 2008 |
| 7338266 |
Screw pump and method of operating the same |
Mar. 4, 2008 |
| 7320579 |
Roots type fluid machine |
Jan. 22, 2008 |
| 7300267 |
Unit for delivering fuel to an internal combustion engine |
Nov. 27, 2007 |
| 7255545 |
Double-lobe type rotor design process |
Aug. 14, 2007 |
| 7244114 |
Scroll compressor |
Jul. 17, 2007 |
| 7226279 |
Gerotor mechanism for a screw hydraulic machine |
Jun. 5, 2007 |
| 7147445 |
Turntable with turning guide |
Dec. 12, 2006 |
| 7137797 |
Turntable with gerotor |
Nov. 21, 2006 |
| 7118359 |
Oil pump rotor |
Oct. 10, 2006 |
| 6988876 |
Scroll type fluid machinery |
Jan. 24, 2006 |
| 6964560 |
Vacuum pump |
Nov. 15, 2005 |
| 6959685 |
Rotary internal combustion engine |
Nov. 1, 2005 |
| 6929458 |
Oil pump rotor |
Aug. 16, 2005 |
| 6923628 |
Vacuum pump |
Aug. 2, 2005 |
| 6890164 |
Internal gear pump |
May. 10, 2005 |
| 6887056 |
Oil pump rotor |
May. 3, 2005 |
| 6872062 |
Scroll compressor |
Mar. 29, 2005 |
| 6783341 |
Pair of interacting gear rims of the rotary machine |
Aug. 31, 2004 |
| 6766783 |
Rotary internal combustion engine |
Jul. 27, 2004 |
| 6761143 |
Coupling structure for expansion unit output shaft and driven-side transmission shaft |
Jul. 13, 2004 |
| 6699025 |
Roller vane pump |
Mar. 2, 2004 |
| 6701220 |
Industrial robot device |
Mar. 2, 2004 |
| 6681738 |
Rotary type fluid machine, vane type fluid machine, and waste heat recovering device for internal combustion engine |
Jan. 27, 2004 |
| 6675765 |
Rotary type fluid machine, vane type fluid machine, and waste heat recovering device for internal combustion engine |
Jan. 13, 2004 |
| 6668786 |
Rotary type fluid machine, vane type fluid machine, and waste heat recovering device for internal combustion engine |
Dec. 30, 2003 |
| 6644947 |
Wave tooth gears using identical non-circular conjugating pitch curves |
Nov. 11, 2003 |
| 6540493 |
Series for gear pumps with differing capacities and method for manufacturing the individual gear pump of the series |
Apr. 1, 2003 |
| 6539913 |
Rotary internal combustion engine |
Apr. 1, 2003 |
| 6513482 |
Rotary fluid machinery, vane fluid machinery, and waste heat recovery device of internal combustion engine |
Feb. 4, 2003 |
| 6503068 |
Variable capacity type pump |
Jan. 7, 2003 |
| 6494698 |
Rotary piston machine having cycloid teeth |
Dec. 17, 2002 |
| 6494697 |
Driven equipment for fluid machinery |
Dec. 17, 2002 |
| 6368091 |
Screw rotor for vacuum pumps |
Apr. 9, 2002 |
| 6368087 |
Scroll-type fluid displacement apparatus having spiral start portion with thick base and thin tip |
Apr. 9, 2002 |
| 6322334 |
Rotary piston system |
Nov. 27, 2001 |
| 6280168 |
Multi-cylinder rotary compressor |
Aug. 28, 2001 |
| 6257851 |
Generalized minimum diameter scroll component |
Jul. 10, 2001 |
| 6244843 |
Internal gear pump |
Jun. 12, 2001 |
| 6236897 |
Calculation and precision processing of cardiocle and expanded cardioid casing curved surfaces for eccentric rotor vane pumps |
May. 22, 2001 |
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