Twin-shaft, multiple-stage vacuum pump with the shafts verticall

Details Twin-shaft, multiple-stage vacuum pump with the shafts verticall Twin-shaft, multiple-stage vacuum pump with the shafts verticall

1988-05-13

1990-07-10

Smith, Leonard E.

Pumps

Motor driven

Electric or magnetic motor

418 88, F04C 2900

Patent

active

049403982

ABSTRACT:
A twin-shaft vacuum pump having a pair of shafts, at least one pump chamber, a pair of rotors disposed in the or in each pump chamber and mounted on the shafts, and housing members defining the pump chamber or chambers, a synchronization mechanism composed of two gears disposed in a side chamber, a drive motor, and a transmission mechanism connecting the drive motor to one of the shafts. In order to simplify installation and servicing of the pump, the shafts are mounted vertically. The side chamber, synchronization mechanism, and transmission mechanism are disposed below the lower rotor pair.

REFERENCES:
patent: Re25567 (1964-05-01), Lorenz
patent: 1446366 (1923-02-01), Young
patent: 1623650 (1927-04-01), Anderson
patent: 2549652 (1951-04-01), Wilhelm
patent: 2880676 (1959-04-01), Succop
patent: 3472445 (1969-10-01), Brown
patent: 3558248 (1971-01-01), Parker
patent: 3628898 (1971-12-01), Bragdon
patent: 3677664 (1972-07-01), Wycliffe et al.
patent: 3796526 (1974-03-01), Cawley
patent: 3811805 (1974-05-01), Moody, Jr. et al.
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patent: 4639199 (1987-01-01), Frings et al.
patent: 4728271 (1988-03-01), Harwarth
patent: 4767284 (1988-08-01), Shiinoki et al.
Patent Abstracts of Japan, "Enclosed Screw Compressor," 52-106618, vol. 3, No. 65 (M-61), Jun. 6, 1979.

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