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Apparatus and method for binding a first layer of material to a second layer of material

  • US 5,893,856 A
  • Filed: 06/12/1996
  • Issued: 04/13/1999
  • Est. Priority Date: 06/12/1996
  • Status: Expired due to Fees
First Claim
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1. A tool for setting a fastener to bind together a first layer of material overlaid by a second layer of material, the first layer having a bore therein transverse to a surface thereof on which the second layer is disposed, and said fastener comprising a body portion having means thereon for locking said body portion in the bore, and legs extending from said body portion and self-biased to extend radially outwardly from said body portion, and distally through the second layer towards the first layer, said tool comprising:

  • a housing portion including a tubular stem and at one end thereof an enlarged housing portion defining a chamber;

    a cannula disposed in said stem, said cannula having a collar extending outwardly from a proximal end thereof, and having at a distal end thereof a penetration point, said collar being disposed in said chamber and adapted to be adjacent a distal wall of said enlarged housing portion; and

    a plunger having a rod portion at least in part disposed in said cannula and in part adapted to be disposed in said chamber, a flange portion extending outwardly from said rod portion in said chamber and adapted to be disposed adjacent a proximal wall of said housing, and a handle portion fixed to a proximal end of said rod and extending through an opening in said housing;

    said cannula being adapted to receive and retain said fastener with said fastener body portion disposed proximate said distal end of said cannula and said fastener legs extending proximally in said cannula;

    said tool being movable axially and distally to move said cannula penetration point through the second layer into alignment with the bore;

    said plunger being movable axially and distally to engage said fastener and to move said fastener into the bore and to move said flange into contact with said cannula collar in said chamber;

    said plunger flange portion having locking means thereon for interlocking said plunger flange portion and said cannula collar upon said contact;

    said plunger being movable proximally in said housing to draw said locking means and thereby said cannula proximally to leave said fastener body portion in the bore and withdraw said cannula from the bore and from the second layer to release said fastener legs for said self-biased movement outwardly and distally through the second layer.

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