Rotary expansible chamber devices – Diverse rotary expansible chamber devices
Patent
1997-02-27
1998-12-08
Thorpe, Timothy
Rotary expansible chamber devices
Diverse rotary expansible chamber devices
418 9, F04C 1818, F04C 2502
Patent
active
058460667
ABSTRACT:
A mechanical vacuum pump having mounted in each of at least three pumping chambers a pair of intermeshing rotors. A first rotor of each pair being mounted for rotation on a first shaft passing through the chambers and a second rotor of each pair being mounted for rotation on a second shaft passing through the chambers. The first and second shafts are driven in contra-rotating directions to effect a sequential pumping action by the pairs of rotors in each chamber in respect of gas being pumped between a pump inlet and a pump outlet. The pump possesses at least one chamber with claw-type profile rotors and one ore more chambers with roots-type profile rotors. The chamber nearest the pump outlet has a rotor with a roots-type profile.
REFERENCES:
patent: Re25567 (1964-05-01), Lorenz
patent: 4934908 (1990-06-01), Turrell et al.
patent: 4940398 (1990-07-01), Berges et al.
patent: 4983107 (1991-01-01), Steffens et al.
patent: 4995796 (1991-02-01), Kambe et al.
Wycliffe, H., "Mechanical high-vacuum pumps with an oil-free swept volume," J. Vac. Sci. Technol. A5(4), Jul./Aug. 1987, pp. 2608-2611.
Gartenberg Ehud
Pace Salvatore P.
Rosenblum David M.
The BOC Group plc
Thorpe Timothy
LandOfFree
Vacuum pumps with claw-type rotor and roots-type rotor near the does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Vacuum pumps with claw-type rotor and roots-type rotor near the , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Vacuum pumps with claw-type rotor and roots-type rotor near the will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-171104