Patent ID: 8006867
Filing Date: 2011-08-30
Classification: B05C,Y10T

Abstract:
1. A caulking gun for a cartridge including an exit nozzle and containing caulk, the caulking gun comprising: a cartridge holder, said cartridge holder including a transversely positioned frontal disk for receiving the exit nozzle; an upper cartridge rail perpendicularly attached to an upper portion of said frontal disk and extending rearward, said upper cartridge rail bent downward at a rearward end; and a lower cartridge rail, perpendicularly attached to a lower portion of said frontal disk, said lower cartridge rail extending rearward and parallel to said upper cartridge rail and attached to the rearward end of said upper rail, said lower cartridge rail having indentations along its length; a stock attached to said upper cartridge rail, said stock including a first hole in a front vertical segment of said stock and a second hole in a rear vertical segment of said stock, said first hole and said second hole in alignment with each other and situated midway between said upper cartridge rail and said lower cartridge rail; a plunger shaft mounted through said first hole and said second hole; a limiting means for limiting rearward movement of said plunger shaft, said limiting means including a vertically positioned restraining plate having a foot pivotally attached to said stock, said restraining plate further having an opening formed therein for loosely receiving said plunger shaft, said restraining plate restricting rearward movement of said plunger shaft as rearward force is exerted on an upper portion of said restraining plate; an actuator plate; dual function spring simultaneously exerting rearward force on said restraining plate and rearward force on said actuator plate; a repositionable handle including a sleeve, said sleeve coplanar with and loosely attached to said lower cartridge rail, said handle thus movable forwardly and rearwardly along the length of said lower cartridge rail; a trigger, pivotally attached to said handle, including trigger indentations at an upper end of said trigger; a handle repositioning means, said repositioning means including a forked tab and a trigger coil spring, a first end of said coil spring contacting an inside of the trigger and a second end of said coil spring coupled to said forked tab, said forked tab movable upwardly against said lower cartridge rail as said trigger is squeezed thus engaging the indentations of said lower cartridge rail, or downwardly as said trigger is fully opened thus releasing said forked tab from said lower cartridge rail; a plunger advancing means to advance the plunger shaft, said means including a trigger bar with trigger bar indentations, said trigger bar having a first end situated just behind and below said front disk and said lower cartridge rail, a trigger bar bracket, said first end of the trigger bar resting on an opening in the trigger bar bracket, said trigger bar bracket attached to said lower cartridge rail, said trigger bar extending rearward, passing through said handle below and parallel with said lower cartridge rail, said trigger bar having a second end entering said stock through a lower horizontal segment of said stock, said second end of the trigger bar attaching to a lower end of said actuator plate such that squeezing the trigger rotates the trigger toward a more vertical alignment against the handle, engaging the trigger indentations against the trigger bar indentations, moving said trigger bar forwardly, simultaneously pulling said actuator plate forward, said actuator plate rotating from a vertical position, pinching against said plunger shaft forcing it forward; a nozzle cutting means for cutting a tip of said exit nozzle, said nozzle cutting means including a small opening in a lower horizontal segment of said trigger bar bracket able to receive the tip, said first end of the trigger bar also including a sharpened edge, said sharpened edge moving forwardly through and inside said bracket opening each time said trigger is squeezed, said moving producing a guillotine action; and a retractable, adjustable and arm securing arm clip, said arm clip tensioned to hold securely to a user's forearm yet adjustable to conform to the user's arm.