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Integrated fastening system

  • US 20030209113A1
  • Filed: 06/20/2002
  • Published: 11/13/2003
  • Est. Priority Date: 05/10/2002
  • Status: Active Grant
First Claim
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1. A fastener system comprising a plurality of ranges of size of threaded fastener, each fastener having a head provided with a recess to receive a tool to rotatingly drive the fastener, and wherein:

  • in each range of sizes, the largest size of fastener has a recess comprising a plurality of driving tiers of reducing size superimposed on one another, each tier having sides which are substantially parallel a long axis of the fastener and define a polygon in section;

    between two adjacent size ranges, there is a common tier, being the largest tier of the recess of the smaller size range and the smallest tier of the recess of the larger size range, which common tier is the same section in each range; and

    the depth from the base of the largest recess to the base of the smallest recess in the smaller size range is less than the depth of the smallest recess in the larger size range.

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