| 摘要 |
Simple and economical embodiments of a drip-stop resistance assembly for cau lking guns incorporating a resistance clip, or alternatively, an elastic grommet or con stricted 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 typ es 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 b ent or cast in the form of an annular yoke for encircling the plunger shaft and providing frictional resis tance against sliding. The resistance clip may be inserted onto the plunger shaft (from above or be low 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 s hown 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 manufact ured OEM or retrofit for minimal additional cost.
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