Hand-operated pump

Details Hand-operated pump Hand-operated pump

1977-02-03

1978-08-15

Freeh, William L.

Expansible chamber devices

With assembly or disassembly facilitating means

417511, 92165R, 222402, F16J 110, B67D 542, F04B 2104

Patent

active

041063929

ABSTRACT:
A hand-operated pump includes a cylinder and a reciprocating plunger. The plunger is made from plastic and includes a piston, a stem and an enlarged hand grip which are all molded integrally with one another so as to form a one-piece unit. The end of the cylinder is closed by a pair of separable caps which are adapted to be slipped sidewise onto the plunger and attached to the cylinder after the plunger has been assembled with the cylinder.

REFERENCES:
patent: 1725318 (1929-08-01), Thayer
patent: 2138605 (1938-11-01), Landis
patent: 2383422 (1945-08-01), Singleton
patent: 2534286 (1950-12-01), Martzen
patent: 2575508 (1951-11-01), Balletto
patent: 3006282 (1961-10-01), Sisson
patent: 3124080 (1964-03-01), Sisson
patent: 3136230 (1964-06-01), Buckley
patent: 3391645 (1968-07-01), Koza
patent: 3722374 (1973-03-01), Densmore

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