Grease gun

Details Grease gun Grease gun

1980-02-11

1982-07-06

Freeh, William L.

Pumps

Successive stages

Reciprocating rigid stages

417268, 417440, 417446, 417554, F04B 300

Patent

active

043380662

ABSTRACT:
A grease gun is fed from a constant supply under pressure. The gun has a hand-pumped lever for delivering shots of grease either at high pressure and low volume or low pressure and high volume depending on a changeover valve. Air bleeds from the gun through the nozzle by a single pump of the lever. The lever causes a pushrod to open a one way valve allowing grease to travel entirely through the gun to the nozzle.
In another version the pushrod is replaced by a cone valve. Both versions are for single handed operation.

REFERENCES:
patent: 1292498 (1919-01-01), Malone
patent: 1834698 (1931-12-01), Gille et al.
patent: 2629328 (1953-02-01), Ladd
patent: 2948222 (1960-08-01), Pine
patent: 3894816 (1975-07-01), Davis et al.
patent: 4159105 (1978-06-01), Vander Laan et al.

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