Two-shaft vacuum pump with internal compression

Details Two-shaft vacuum pump with internal compression Two-shaft vacuum pump with internal compression

1986-01-30

1987-01-27

Vrablik, John J.

Rotary expansible chamber devices

Diverse rotary expansible chamber devices

418 9, 418 15, 418206, F04C 1818, F04C 2300, F04C 2502

Patent

active

046391991

ABSTRACT:
A two-shaft vacuum pump which draws gas in at an inlet and compresses it at a first outlet for discharge, thereby producing a vacuum at the inlet, has a second, pressure-responsive outlet from the area where the gas is compressed for discharge from the first outlet. The second outlet thereby relieves excess, compression gas pressure which could overload the pump motor, for example, at the start of operation when high-density gas is drawn in for compression.

REFERENCES:
patent: 1818767 (1931-08-01), Swartwout
patent: 2129960 (1938-09-01), Presby
patent: 3677664 (1972-07-01), Wycliffe et al.
patent: 3844695 (1974-10-01), Weatherston
patent: 3989413 (1976-11-01), McGahan et al.
patent: 4068988 (1978-01-01), Webb et al.
VDI-Zeitschrift, vol. 91, No. 10, May 10, 1949.

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