Bidirectionally pumping air pump

Details Bidirectionally pumping air pump Bidirectionally pumping air pump

1994-11-10

1996-02-06

Bertsch, Richard A.

Pumps

Expansible chamber type

Plural pumping chambers

417546, 417547, F04B 114, F04B 3910

Patent

active

054891973

ABSTRACT:
An improved pump structure including a shaft tube, a pivot tube, a piston element, a push and pull element and a handle element. The shaft tube is inserted inside the tube. The pivot tube's two ends are respectively connected to the handle element and the piston element. The piston element is disposed in the air chamber of the push and pull element. By an ingenious arrangement of holes, tubes and unidirectional valves, the reciprocating travels of the push and pull element permit simultaneous pumping and air intake, increasing the pumping efficiency.

REFERENCES:
patent: 32260 (1861-05-01), Watters
patent: 497050 (1893-05-01), Guest
patent: 5051073 (1991-09-01), Newbold
patent: 5165876 (1992-11-01), Wang

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