Scroll apparatus

Details Scroll apparatus Scroll apparatus

1995-04-27

1997-05-06

Vrablik, John J.

Rotary expansible chamber devices

Multistage

One working chamber stage encircles another

418 15, 418 552, F04C 1804, F04C 2502

Patent

active

056264690

ABSTRACT:
A vacuum pump of the scroll type having first and second scroll components each having a scroll structure defined thereon. The scroll components are arranged in the pump such that the respective scroll structures inter-engage with the first scroll component being held stationary and the second scroll component orbiting the first scroll component to trap a volume of gas and urge the volume from one end of the respective scroll structures to the other end. The first and second scroll components define inter-engaging scroll structures having an initial multi-start portion including at least two pump inlets and a subsequent single-start portion including a pump outlet.

REFERENCES:
patent: 4141677 (1979-02-01), Weaver et al.
patent: 4613291 (1986-09-01), Sidransky
patent: 5346374 (1994-09-01), Guttinger

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