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Magazine interlock for a fastener driving device

  • US 4,597,517 A
  • Filed: 06/21/1985
  • Issued: 07/01/1986
  • Est. Priority Date: 06/21/1985
  • Status: Expired due to Term
First Claim
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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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