Vacuum producing rotary vane pump with shaft lubrication

Details Vacuum producing rotary vane pump with shaft lubrication Vacuum producing rotary vane pump with shaft lubrication

1977-06-29

1980-11-04

Smith, Leonard E.

Rotary expansible chamber devices

Grooved abutting cylinder-rotating member end surfaces

Non-working fluid directed to groove

418 82, 418 93, 418152, F04C 2900, F04C 2500

Patent

active

042317274

ABSTRACT:
A rotary vacuum pump is provided with a housing having a cylindrical chamber. A rotor having a plurality of slideably mounted vanes is mounted within the chamber by a shaft extending through an eccentric bore. Hydraulic oil delivered to the rotor under pressure urges the vanes against the chamber walls. Escaping oil lubricates and seals the vanes and also lubricate the rotor shaft.

REFERENCES:
patent: 1270872 (1918-07-01), Roberts et al.
patent: 2022610 (1935-11-01), Wendell
patent: 2481143 (1959-09-01), Muller
patent: 2737341 (1956-03-01), Bitzer
patent: 2903971 (1959-09-01), Collins
patent: 3169696 (1965-02-01), Warner
patent: 3258198 (1966-06-01), Harlin
patent: 3312387 (1967-04-01), Cassidy et al.
patent: 3622254 (1971-11-01), LeBlanc, Jr.

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