Vacuum pumps

Details Vacuum pumps Vacuum pumps

1993-10-21

1995-03-28

Bertsch, Richard A.

Rotary expansible chamber devices

Interengaging rotating members

418 9, F01C 108

Patent

active

054011515

ABSTRACT:
A mechanical vacuum pump is provided with a pair of cooperating rotors mounted on rotatable shafts within a pumping chamber. Each of the pair of cooperating rotors has a claw profile that terminates in a leading edge shaped to present an angle of no greater than 90 degrees relative to the wall of the pumping chamber. The leading edge shaped in such manner helps to prevent contaminant buildup on the wall of the pumping chamber.

REFERENCES:
patent: 4076469 (1978-02-01), Weatherston
patent: 4437818 (1984-03-01), Weatherston
patent: 5099050 (1991-09-01), Berges et al.

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