Caulk gun

Details Caulk gun Caulk gun

1994-10-11

1996-01-09

Huson, Gregory L.

Dispensing

With discharge assistant

Container with follower

222327, B67D 542

Patent

active

054821894

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: 5341964 (1994-08-01), Medved

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