Suction pump

Details Suction pump Suction pump

1984-10-03

1986-04-22

Croyle, Carlton R.

Pumps

Expansible chamber type

Fluid serially moved to opposite side of pumping member

137539, 137903, 141 65, F04B 2102

Patent

active

045839255

ABSTRACT:
A suction pump which includes a valving member including a one way check valve, a cylinder and sliding cup seal connected to said check valve so that a negative pressure can be developed by the pump. The valving member includes a valving seat, a valving ball, and a plurality of biasing leaflets. The valving body less the ball is preferably formed as an integral elastomeric body. The seal makes a sliding seal in the direction of evacuating movement, and deflects to permit air to by-pass it in the other direction.

REFERENCES:
patent: 1601705 (1926-09-01), Staunton
patent: 2577417 (1951-12-01), Halpin
patent: 2648474 (1953-08-01), Crook
patent: 2883939 (1959-04-01), Russell
patent: 4072291 (1978-02-01), Adams
patent: 4185721 (1980-01-01), Karklins et al.
patent: 4249583 (1981-02-01), Lundbladh
patent: 4287819 (1981-09-01), Emerit
patent: 4315601 (1982-02-01), Brooker
patent: 4375825 (1983-03-01), Greenspan

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