Evanns & Walsh
Caulking gun
 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. 
G Y B B
G01F Y10T B05C B05C
inventional additional additional inventional
Sherman L.
Weiss