Plunger for hand grease guns

Details Plunger for hand grease guns Plunger for hand grease guns

1976-12-29

1978-04-11

Brown, David H.

Lubrication

Lubricators

Nipple or fitting

92240, 222256, 222326, G01F 1100, F16J 900

Patent

active

040834280

ABSTRACT:
A grease gun plunger of elastic material formed to provide a central hub, a peripheral skirt, and a web joining the skirt to said hub, the web being unitary with said hub at a first end of the plunger and with the skirt at a second end of the plunger to comprise a generally conical partition across the plunger. The skirt has an outer surface which tapers inwardly in both axial directions from a location of maximum outside diameter near the second end of the plunger. The plunger has a peripheral groove around said second end, said groove having a radial dimension substantially equal to the radial thickness of said skirt.

REFERENCES:
patent: 1430723 (1922-10-01), Chilson
patent: 1540978 (1925-06-01), Barthel
patent: 2886215 (1959-05-01), Klein et al.
patent: 3038768 (1962-06-01), Kludt
patent: 3215320 (1965-11-01), Heisler et al.
patent: 3501063 (1970-03-01), Sundholm
patent: 3655101 (1972-04-01), Dorn

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