Hand held electric caulking gun
First Claim
1. A hand held electric caulking gun including in combination, a receptable for receiving therein a caulk containing cartridge having a caulk dispensing nozzle, a piston movable when driven through said cartridge to force the caulking therein from said nozzle, means including a reciprocating surface, driving means for said reciprocating surface including an electric motor, a speed reducing drive train connecting said motor with said reciprocating surface whereby operation of said motor causes reciprocal movement of said surface, and a spring piston gripping plate movable by movement of said reciprocating surface to engage in gripping relation the surface of said piston to effect movement of said piston through said cartridge to force caulking therein from said nozzle, said spring piston gripping plate resiliently being yieldable to absorb the reciprocating movement of said reciprocating surface upon a predetermined movement arresting force being applied to the caulk driving end of said piston during operation of said motor.
0 Assignments
0 Petitions
Accused Products
Abstract
A hand-held electric caulking gun wherein a caulk-driving piston is forced through the caulk-retaining receptacle of the gun in a manner to force caulking from the gun with considerable force and at a continuous easy-to-control flow. The gun includes a spring type clutch linkage that operates to yieldably disengage the drive source from the piston should the reacting force against the caulk driving end of the piston exceed a predetermined value and a releasing device for allowing the piston to be disengaged of its drive linkage for allowing manual movement of the piston through the gun.
48 Citations
33 Claims
- 1. A hand held electric caulking gun including in combination, a receptable for receiving therein a caulk containing cartridge having a caulk dispensing nozzle, a piston movable when driven through said cartridge to force the caulking therein from said nozzle, means including a reciprocating surface, driving means for said reciprocating surface including an electric motor, a speed reducing drive train connecting said motor with said reciprocating surface whereby operation of said motor causes reciprocal movement of said surface, and a spring piston gripping plate movable by movement of said reciprocating surface to engage in gripping relation the surface of said piston to effect movement of said piston through said cartridge to force caulking therein from said nozzle, said spring piston gripping plate resiliently being yieldable to absorb the reciprocating movement of said reciprocating surface upon a predetermined movement arresting force being applied to the caulk driving end of said piston during operation of said motor.
- 8. A hand-held electric caulking gun including in combination, a receptacle for receiving therein a caulk containing cartridge having a caulk dispensing nozzle thereon, a piston movable when driven through said cartridge to force the caulking therein from said nozzle, means including a cam surface, driving means for said cam surface including an electric motor, a speed reducing drive train connecting said motor with said cam surface whereby operation of said motor causes reciprocating movement of said cam surface, piston gripping means movable by reciprocating movement of said cam surface to engage in gripping relation the surface of said piston to effect movement of said piston through said cartridge to form the caulking therein from said nozzle and yieeldable spring clutch means interposed between said motor and piston and operative to yieldably absorb the reciprocal movement of said cam surface as required to drivably disengage the motor from the piston upon a predetermined movement retarding pressure being applied to the piston during operation of said motor.
- 19. A hand-held electric caulking gun including in combination a receptacle for receiving therein a caulk containing cartridge having a caulk dispensing nozzle thereon, a piston movable when driven through said cartridge to force the caulking therein from said nozzle, driving means for said piston including a driving plate disposed about said piston and movable when driven to grip the surface of said piston to move said piston through said cartridge, driving means for said plate including a cam surface movable when driven to drive said plate, an electric motor, a speed reducing drive train connecting said motor with said cam and operable, upon operation of said motor, to drive said cam surface and spring clutch means disposed between said piston and motor and operative to yieldably interrupt movement between said motor and piston upon a predetermined movement retarding force being applied to said piston during operation of said motor.
- 27. A hand-held electric caulking gun including in combination, a receptacle for receiving therein a caulk containing cartridge having a caulk dispensing nozzle thereon, a piston movable when driven through said cartridge to force the caulking therein from said nozzle, driving means for said piston including a drive plate movable when driven to grip the surface of said piston to drive said piston through said cartridge, an electric motor, reciprocating cam surface means, a speed reducing drive train connecting said motor with said reciprocating cam surface and operable when driven by said motor to cause movement of said cam surface, holding means movable to hold said piston in its plate driven position and spring clutch means disposed in said speed reducing drive train between said motor and piston and operative to drivably absorb motion between said motor and piston upon a predetermined movement arresting pressure being applied to the caulk driving end of said piston during operation of said motor.
Specification