Caulk gun

Details Caulk gun Caulk gun

1994-06-30

1996-09-10

Huson, Gregory L.

Dispensing

With discharge assistant

Container with follower

222327, 222340, B67D 542

Patent

active

055537545

ABSTRACT:
A dripless caulk gun is disclosed having a biased-spring drive mechanism and a plunger that presses against an inside surface of a caulk tube for dispensing caulk. At the end of the plunger is a piston having a flexible rim which creates a seal between the piston and an inside surface of the caulk tube, thus creating a partial vacuum in a volume between the piston and the inside end face of the caulk tube when the plunger is moved backward. The partial vacuum causes a drive plate within the caulk tube to move back into the partial vacuum, thereby relieving all built-up pressure within the caulk-filled portion of the caulk tube which immediately ends dispensing of caulk.

REFERENCES:
patent: 2786604 (1957-03-01), Collins
patent: 3029985 (1962-04-01), Krueger et al.
patent: 3378175 (1968-04-01), Krieps
patent: 4081112 (1978-03-01), Chang
patent: 4461407 (1984-07-01), Finnegan

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