Stapler safety device to limit motion of striker

CAFC
  • US 7,234,621 B2
  • Filed: 12/15/2005
  • Issued: 06/26/2007
  • Est. Priority Date: 02/23/2005
  • Status: Active Grant
First Claim
Patent Images

1. A safety mechanism for a self-powered tool that ejects and drives fasteners into a working surface, comprising:

  • a housing having a striker at a front of the housing slidable along a path therein between an upper position and a lower position;

    a fastener disposed within the housing along the path of the striker, wherein the fastener is ejected from the tool as the striker moves from the upper position to the lower position;

    a power spring biasing the striker into the fastener;

    a pivoting release lever selectively linked to the striker;

    a hooking bar pivotably engaging the housing and biased into hooking the striker at an opening in the striker to substantially immobilize the striker before the striker impacts the fastener;

    a sensor bar having a first end and a second end, wherein the first end of the sensor bar extends from the housing, and wherein the sensor bar translates linearly in the housing, and the second end of the sensor bar selectively engages the hook to generate a pivoting motion; and

    wherein the second end of the sensor bar engages the working surface which translates the second end of the sensor bar into the hooking bar to pivot the hooking bar against the bias and out of the path of the striker thus enabling the striker to slide along the path in the housing.

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