Grease gun

Details Grease gun Grease gun

1977-05-18

1979-06-12

Spar, Robert J.

Dispensing

With discharge assistant

Plural

222334, 222389, 184 29, 417403, G01F 1104, G01F 1116, F16N 1110, F04B 500

Patent

active

041577736

ABSTRACT:
A grease gun comprising a hollow piston rod driven by a pressure fluid upon an annular drive piston at one end of the rod, compressing a supply of grease by an annular plunger at the other end of the rod into a receiving chamber within the piston rod, which chamber cooperates with a stationary surface, upon reversely driving the piston rod, to expel the grease through a conduit from the chamber at a higher pressure than the driving fluid.

REFERENCES:
patent: 1529918 (1925-03-01), Richards
patent: 1621657 (1927-03-01), Cooper et al.
patent: 1657819 (1928-01-01), Cooper et al.
patent: 2058455 (1936-10-01), Huff
patent: 3327906 (1967-06-01), Gomann

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