Low pressure fluid pump

Details Low pressure fluid pump Low pressure fluid pump

1990-12-12

1992-09-08

Bertsch, Richard A.

Pumps

Expansible chamber type

Valve in collapsible wall pumping member

417903, 92 92, 92130R, F04B 4300

Patent

active

051453380

ABSTRACT:
A low pressure air pump includes an outer flexible envelope which encloses an articulate frame. When the envelope is manually compressed against a smooth surface, an intake aperture on the bottom side of the envelope is sealed and air is forced out of the pump. When pressure is released from the pump, the frame returns the envelope to its uncompressed state and, in so doing, opens the intake aperture to take in more air.

REFERENCES:
patent: 888833 (1908-05-01), Miller
patent: 2943641 (1960-07-01), Arnold
patent: 3133696 (1964-05-01), Mirando
patent: 3155991 (1964-11-01), Dunham
patent: 3524714 (1970-08-01), Grove et al.
patent: 3561892 (1971-02-01), Ackermann et al.
patent: 3804125 (1974-04-01), Sonneman
patent: 4906167 (1990-03-01), Besic et al.

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