Dripless drive resistance clip for caulk dispensing devices

Details Dripless drive resistance clip for caulk dispensing devices Dripless drive resistance clip for caulk dispensing devices

1996-01-16

1998-08-04

Huson, Gregory L.

Dispensing

With discharge assistant

Container with follower

222327, B67D 542

Patent

active

057881260

ABSTRACT:
Simple and economical embodiments of a drip-stop resistance assembly for caulking guns incorporating a resistance clip, or alternatively, an elastic grommet or constricted spring. The drip-stop assembly may be used with various manually-operated caulking guns including those with metal enclosures and single piece molded plastic open frames, and with various types of plunger shafts including those with a circular or hexagonal cross-section, or ratchet teeth. The drip-stop assembly includes a resistance clip formed of resilient steel wire or the like, and bent or cast in the form of an annular yoke for encircling the plunger shaft and providing frictional resistance against sliding. The resistance clip may be inserted onto the plunger shaft (from above or below the housing) at various positions along the shaft. A back-plate formed by a conventional washer, or angle-bracket is inserted on the plunger shaft and is spaced from the resistance clip for allowing the latter to frictionally slide a short distance. An elastic grommet and constricted spring are also shown as substitutes for the resistance clip. All of the illustrated drip-stop assemblies provide an initial momentary release feature to terminate the bead of caulk upon initial release of the trigger, reduce blow-back, and prevent inadvertent retraction of the plunger shaft. The assemblies are all simple and inexpensive to manufacture, yet highly effective. Its simplicity allows them to be manufactured OEM or retrofit for minimal additional cost.

REFERENCES:
patent: 4009804 (1977-03-01), Costa et al.
patent: 5529225 (1996-06-01), Chang
patent: 5615807 (1997-04-01), Peng

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