Cartridge rotary vane pump

Details Cartridge rotary vane pump Cartridge rotary vane pump

1984-04-23

1989-06-13

Smith, Leonard E.

Rotary expansible chamber devices

Multistage

Sliding vane

418 70, 418 96, 417360, F04C 2702, F04C 2300

Patent

active

048387720

ABSTRACT:
A rotary vane vacuum pump includes a drive unit, such as an electric motor, and a pump unit, preferably constructed as a cartridge pump unit. The drive unit may take any suitable form, but the cartridge unit includes one or more pumping stages plus a pumping stage of small dimension to lower pressure and increase outgassing of the lubricant. The rotors of the rotary vane pump unit are shaftless, that is they together form an axis of rotation without a separate axial shaft and are thus simplified in construction. All of the requirements of oiling, outgassing and gas ballast are fulfilled in the additional stage.

REFERENCES:
patent: 1241100 (1917-09-01), Eden
patent: 1672205 (1928-06-01), Eisler
patent: 1714818 (1929-05-01), Reed
patent: 2062045 (1936-11-01), Van Deventer
patent: 2193273 (1940-03-01), Dietzel
patent: 2902210 (1959-09-01), Power
patent: 3237851 (1966-03-01), LeBlanc, Jr.
patent: 3399826 (1968-09-01), Andriulis
patent: 3507129 (1970-04-01), Tarenskeen
patent: 3525578 (1970-08-01), LeBlanc, Jr.
patent: 3620656 (1971-11-01), Sharples
patent: 3782868 (1974-01-01), LeBlanc, Jr.
patent: 3838950 (1974-10-01), Andriulis
patent: 3901631 (1975-08-01), Wickham et al.

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