Magazine interlock for a fastener driving device
First Claim
1. In a portable fastener driving device comprising a housing having a nose portion, a piston and cylinder means in said housing including a driver secured to said piston, which driver extends through a drive track defined by said nose portion, a fastener magazine connected to said housing adjacent said nose portion and positioned to dispose succeeding fasteners in said drive track, means for controlling the operation of said piston including a trigger assembly, a linkage assembly disposed adjacent said nose portion and said trigger assembly whereby said trigger assembly cannot be operated to drive a fastener into a workpiece until the nose portion of the tool is in engagement with the workpiece, said linkage assembly including a first member movably connected to said nose portion, spring means biasing said first member to extend beyond said nose portion, a second member connected to said magazine and a third member movably secured to said housing and biased away from said trigger but movable to render the trigger operational to drive a fastener.
2 Assignments
0 Petitions
Accused Products
Abstract
A pneumatic fastener driving tool of the hand held gun type having means for positively insuring against accidental firing when the fastener magazine is empty or detached, or when the nosepiece is not pressed against a workpiece. The means comprises a linkage train including an intermediate link carried by the magazine and movable by a first link reciprocably associated with the nosepiece to move a second link associated with the trigger assembly to render the trigger operational for firing the tool. There are locking means associated with the feeder of the fasteners for locking the intermediate link in an inoperative position when the magazine is empty of fasteners.
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Citations
12 Claims
- 1. In a portable fastener driving device comprising a housing having a nose portion, a piston and cylinder means in said housing including a driver secured to said piston, which driver extends through a drive track defined by said nose portion, a fastener magazine connected to said housing adjacent said nose portion and positioned to dispose succeeding fasteners in said drive track, means for controlling the operation of said piston including a trigger assembly, a linkage assembly disposed adjacent said nose portion and said trigger assembly whereby said trigger assembly cannot be operated to drive a fastener into a workpiece until the nose portion of the tool is in engagement with the workpiece, said linkage assembly including a first member movably connected to said nose portion, spring means biasing said first member to extend beyond said nose portion, a second member connected to said magazine and a third member movably secured to said housing and biased away from said trigger but movable to render the trigger operational to drive a fastener.
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6. In a portable fastener driving tool operated by air pressure and comprising a housing, piston and cylinder means in said housing including a driver for driving fasteners into a workpiece, a nosepiece on said housing defining a drive track adapted to receive fasteners to be driven, a fastener magazine detachably connected to said nosepiece, and a manually operable trigger means on the housing for actuating the driver but normally inoperative to drive a fastener into a workpiece, the improvement comprising:
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a linkage train between the nosepiece and the trigger means for rendering the trigger means operational to drive a fastener, said linkage train including, first and second links movably associated with the nosepiece and trigger means respectively, and an intermediate link movably mounted on said magazine and biased out of operational engagement with said second link but movable by said first link to move said second link to render the trigger operational. - View Dependent Claims (7, 8, 9, 10, 11, 12)
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Specification