Rotary pump

Details Rotary pump Rotary pump

2006-10-03

2006-10-03

Trieu, Theresa (Department: 3748)

Rotary expansible chamber devices

Positively actuated vane

C418S001000, C418S015000, C418S078000, C418S152000

Reexamination Certificate

active

07114931

ABSTRACT:
A rotary pump includes a stator housing and a rotor. The stator housing preferably has an oblong inner surface. The rotor, which is disposed in the stator housing, preferably has a substantially circular outer surface within which a plurality of vane slots are defined. A first chamber is defined between a first half of the oblong inner surface and the outer surface of the rotor. Similarly, a second chamber is defined between a second half of the oblong inner surface, diametrically opposite the first half, and the outer surface of the rotor. Resting within each of the plurality of vane slots is a corresponding sliding vane. A first inlet port and a first outlet port each provide access to the first chamber. Similarly, a second inlet port and a second outlet port each provide access to the second chamber. At least one of the vanes separates each of the first inlet port, the first outlet port, the second inlet port and the second outlet port from one another.

REFERENCES:
patent: 2451666 (1948-10-01), De Lancey
patent: 2463155 (1949-03-01), Dawes
patent: 3286913 (1966-11-01), Kaatz et al.
patent: 3686893 (1972-08-01), Edwards
patent: 3779216 (1973-12-01), Britt
patent: 4514157 (1985-04-01), Nakamura et al.
patent: 6565337 (2003-05-01), Henderson
patent: 03061690 (1991-03-01), None
patent: 11037071 (1999-02-01), None

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