초록 ▼

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 car

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.

대표청구항 ▼

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 sai

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.