| |
 |
|
Class Information
Number: 418/201.1
Name: Rotary expansible chamber devices > Interengaging rotating members > Helical or herringbone
Description: Apparatus wherein the surface portions of the interengaging rotary member are formed with intermeshing teeth or ribs and grooves, the teeth or ribs and grooves being in the form of a helix or discontinuous, angularly related, straight line segment (i.e., herringbone shape).
Sub-classes under this class:
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7618248 |
Screw compressor with intermediate plate |
Nov. 17, 2009 |
| 7614862 |
Water-injected screw compressor element |
Nov. 10, 2009 |
| 7604467 |
Supercharger with housing internal noise attenuation |
Oct. 20, 2009 |
| 7600982 |
Compact helical compressor for mobile use in a vehicle |
Oct. 13, 2009 |
| 7588430 |
Screw compressor |
Sep. 15, 2009 |
| 7568898 |
Compressor sound suppression |
Aug. 4, 2009 |
| 7553142 |
Lubrication system for compressor |
Jun. 30, 2009 |
| 7553144 |
Gas compressor having a pair of housing heads |
Jun. 30, 2009 |
| 7513761 |
Double screw compressor for supplying gas |
Apr. 7, 2009 |
| 7500838 |
Vacuum pump with a pair of screw rotors |
Mar. 10, 2009 |
| 7497672 |
Screw pump with increased volume of fluid to be transferred |
Mar. 3, 2009 |
| 7484943 |
Screw pump with improved efficiency of drawing fluid |
Feb. 3, 2009 |
| 7481634 |
Volumetric screw compressor provided with delivery adjustment device |
Jan. 27, 2009 |
| 7473084 |
Oil-cooled screw compressor |
Jan. 6, 2009 |
| 7458369 |
Supercharger lubrication structure |
Dec. 2, 2008 |
| 7458790 |
Vacuum pump with improved oil lubrication |
Dec. 2, 2008 |
| 7452194 |
Screw pump |
Nov. 18, 2008 |
| 7377956 |
Method and system for processing natural gas using a rotary screw compressor |
May. 27, 2008 |
| 7338266 |
Screw pump and method of operating the same |
Mar. 4, 2008 |
| 7316546 |
Screw compressor |
Jan. 8, 2008 |
| 7296983 |
Gas compression apparatus capable of preventing lubricant leakage |
Nov. 20, 2007 |
| 7278839 |
Multi-stage vacuum pump |
Oct. 9, 2007 |
| 7275921 |
Pumps |
Oct. 2, 2007 |
| 7234926 |
Air compressor assembly |
Jun. 26, 2007 |
| 7234925 |
Screw pump |
Jun. 26, 2007 |
| 7232295 |
Tempering method for a screw-type vacuum pump |
Jun. 19, 2007 |
| 7214036 |
Screw type vacuum pump |
May. 8, 2007 |
| 7201569 |
Screw compressor |
Apr. 10, 2007 |
| 7192262 |
Twin-shaft vacuum pump and method of forming same |
Mar. 20, 2007 |
| 7189066 |
Light gas vacuum pumping system |
Mar. 13, 2007 |
| 7178352 |
Compressor |
Feb. 20, 2007 |
| 7174917 |
Inlet piece for a liquid-injected compressor element |
Feb. 13, 2007 |
| 7165949 |
Cavitation noise reduction system for a rotary screw vacuum pump |
Jan. 23, 2007 |
| 7163387 |
Meshing helical rotors |
Jan. 16, 2007 |
| 7153111 |
Screw machine |
Dec. 26, 2006 |
| 7150611 |
Equipment with mutually interacting spiral teeth |
Dec. 19, 2006 |
| 7144235 |
Bearing and screw compressor |
Dec. 5, 2006 |
| 7140846 |
Vacuum pump having main and sub pumps |
Nov. 28, 2006 |
| 7104772 |
Screw compressor |
Sep. 12, 2006 |
| 7080977 |
Discharge diffuser for screw compressor |
Jul. 25, 2006 |
| 7074026 |
Multi-stage helical screw rotor |
Jul. 11, 2006 |
| 7056108 |
Cooled screw-type vacuum pump |
Jun. 6, 2006 |
| 7044724 |
Screw compressor and method of manufacturing rotors thereof |
May. 16, 2006 |
| 7040882 |
Water-injected screw-type compressor |
May. 9, 2006 |
| 7040845 |
Screw compressor and method of manufacturing rotors thereof |
May. 9, 2006 |
| 7014437 |
Screw compressor |
Mar. 21, 2006 |
| 7008201 |
Gapless screw rotor device |
Mar. 7, 2006 |
| 6991443 |
Oil injected screw compressor |
Jan. 31, 2006 |
| 6991440 |
Two-stage screw compressor |
Jan. 31, 2006 |
| 6988877 |
Screw machine |
Jan. 24, 2006 |
|
|
|
