Patent ID: 6908016

Claim:
A caulking gun comprising a gun rack, a gun body connected to the gun rack, and a push rod configured to traverse through the gun rack and the gun body; wherein said gun rack includes a trigger, a driving section, a jointing section and a fixed handle; said jointing section is provided at a distal end of the gun rack and defines a hole for receiving at least one coupling component; said driving section includes a driving girder, a driving chamber, a braking bolt and a braking bulge and is located proximally with respect to said jointing section; said fixed handle is located under the driving chamber, said driving girder is provided between the fixed handle and the jointing section and a pin hole for pin jointing the trigger to the driving girder is defined thereon; said braking bolt and said braking bulge protrude proximally from a back wall of the driving chamber and a push rod through hole for allowing the push rod to pass through is defined on the back wall between the braking bolt and the braking bulge; said trigger is pin jointed on the driving girder of the gun rack via the pin hole; said caulking gun further comprising: a front block at a distal end of the gun body for supporting a caulk cartridge nozzle, a back block at a proximal end of the gun body and defining an assembling hole for coupling with at least one coupling component, said gun body is fixed to the gun rack by the at least one coupling component which defines a through hole for traversal of said push rod there through; a forward push element is fixed at the front end of the said push rod; a position-limiting tube, a driving element and a driving spring are provided within the driving chamber and surround the push rod; said driving element is moved distally by a driving shaft as the trigger is moved proximally, said driving element compressing the driving spring as it moves distally; a braking assembly including braking element caught by the braking bolt prevents movement of the push rod, said braking bulge acts as a fulcrum for the braking element.