Caulk gun with tube engaging receptacle

Details Caulk gun with tube engaging receptacle Caulk gun with tube engaging receptacle

1994-10-27

1997-01-21

Huson, Gregory L.

Dispensing

With discharge assistant

Insertable cartridge or removable container

222391, B65D 8854

Patent

active

055953271

ABSTRACT:
A caulk gun having a piston with a flexible rim providing dripless dispensing of caulk or adhesive and including a tube-engaging receptacle for securely holding a tube is disclosed. The advantages of a dripless caulk gun are provided by a piston having a flexible circumferential rim that engages an inside surface of a caulk or adhesive dispensing tube to create an atmospheric seal. The plunger moves the piston against an inside movable surface of the dispensing tube. When the trigger is released, the plunger mechanism moves backward, and the piston creates a partial vacuum within the caulk tube thereby halting dispensing. The dispensing tube is attached to the caulk gun by secure engagement with a tube-engaging receptacle. The receptacle may be provided with threads that threadingly engage with a portion of the dispensing tube. Alternatively, the tube-engaging receptacle may be provided with threads and a threaded lockring wherein the lockring fits down over the caulk tube and presses against a protruding band. Also disclosed is a piston for providing dripless operation wherein the piston comprises a disc and gasket that can be attached to prior art plunger assemblies.

REFERENCES:
patent: 4090639 (1978-05-01), Campbell et al.
patent: 4318499 (1982-03-01), Hamilton

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