Manual pump

Details Manual pump Manual pump

1991-10-09

1992-10-20

Bertsch, Richard A.

Pumps

Expansible chamber type

Having pumping chamber pressure responsive distributor

417236, 417239, 417442, F04B 3910

Patent

active

051565382

ABSTRACT:
An elongated tubular member has an upper closed end and a lower closed end with a first opening. It also has a second opening on its wall and a suction unit movable within the same. A first tubular member has a top open end and a constricted bottom end. The first tubular member has a first inflow and outflow check valve circumferentially spaced from the first inflow check valve. A partition provided adjacent to he constricted bottom end of the first tubular member has a third opening and second inflow and outflow check valves. The elongated tubular member resides rotatably and engageably in the first tubular member.

REFERENCES:
patent: 5071325 (1991-12-01), Tupper et al.

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