| 摘要 |
A caulking gun of the type having a cradle to receive a cartridge of compound having a piston in it and a dispensing nozzle. The gun has a handle and operating member or trigger which drives a stem having a thrust disk which engages the piston in the cartridge. A member is provided on the actuating stem to prevent further movement of the stem after the thrust disk and piston are in a position wherein the end member or cap on the end of the gun could be broken off. In that type of gun having a latch member or latch dog which requires manual release to allow rearward movement of the stem the stop member actuates the release member to release the stem for rearward movement.
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