Pump set comprising a liquid ring vacuum pump preceeded by a com

Details Pump set comprising a liquid ring vacuum pump preceeded by a com Pump set comprising a liquid ring vacuum pump preceeded by a com

1975-06-09

1980-09-30

Freeh, William L.

Pumps

Condition responsive control of pump drive motor

Plural pumps having separate drive motors, supply sources,...

417 28, 417 69, 417203, 417247, F04B 4106

Patent

active

042252881

ABSTRACT:
A pump set comprising a compressor followed by a liquid ring vacuum pump with the two pumps matched to each other so that a relatively small liquid ring vacuum pump can draw and maintain vacuum under 40 Torr.

REFERENCES:
patent: 1792741 (1931-02-01), Hayton
patent: 2397443 (1946-03-01), Statham et al.
patent: 2492075 (1949-12-01), Van Atta
patent: 3072058 (1963-01-01), Christopher et al.
patent: 3221659 (1965-12-01), Adams
patent: 3315607 (1967-04-01), Maclnnes
patent: 3359908 (1967-12-01), Toma
patent: 3558236 (1971-01-01), Bylsma
patent: 3575532 (1971-04-01), Mugele et al.
patent: 3922110 (1975-11-01), Huse
patent: 3973865 (1976-08-01), Mugele

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