Reduced rotor assembly diameter vane pump

Details Reduced rotor assembly diameter vane pump Reduced rotor assembly diameter vane pump

2011-08-16

2011-08-16

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

With changeable working chamber magnitude

Spring or fluid biased movable member

C418S030000, C418S152000, C418S179000

Reexamination Certificate

active

07997882

ABSTRACT:
A vane pump with a reduced rotor diameter is provided. The reduced rotor diameter allows a reduction in the overall size of the pump which allows the pump to be used in circumstances wherein sufficient packaging volume does not exist for conventional vane pumps. Further, the reduced rotor diameter permits operation of the pump at a higher speed, in comparison to conventional vane pumps, for a given working fluid and pump rate. The rotor includes an integrally formed drive shaft and a cylindrical rotor head. Both fixed displacement and variable displacement embodiments are shown.

REFERENCES:
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patent: 4144005 (1979-03-01), Brucken
patent: 4437819 (1984-03-01), Merz
patent: 4558998 (1985-12-01), Kiyoshige et al.
patent: 4616984 (1986-10-01), Inagaki et al.
patent: 5918573 (1999-07-01), Killion
patent: 2004/0216956 (2004-11-01), Pascoe et al.

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