Hand operated vacuum pump

Details Hand operated vacuum pump Hand operated vacuum pump

1984-03-13

1986-01-21

Croyle, Carlton R.

Pumps

Expansible chamber type

Having separate noncyclic valve

417554, 417566, 417 63, 92128, 92164, F04B 2300, F04B 2104, F01B 2900

Patent

active

045655065

ABSTRACT:
An improved hand-operated vacuum pump is disclosed and includes a cylinder, head assembly, and elastic seal member. The cylinder and head assembly define opposing grooves, and the elastic seal member is positioned in the grooves to secure the head assembly to the cylinder. A piston assembly is operative within the cylinder to draw a vacuum within the head assembly.

REFERENCES:
patent: Re25873 (1965-10-01), Rutherford
patent: 1118963 (1914-12-01), Stage
patent: 1697206 (1929-01-01), Roberts
patent: 2049872 (1936-08-01), Sera
patent: 2687910 (1954-08-01), Petch et al.
patent: 2895424 (1959-07-01), Tramontini et al.
patent: 3094939 (1963-06-01), Smith, Sr. et al.
patent: 3494652 (1970-02-01), Langland
patent: 3612722 (1971-10-01), Neward
patent: 3650182 (1972-03-01), Phillips
patent: 3730217 (1973-05-01), Gute
patent: 4357858 (1982-11-01), Wedman

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