Patent ID: 6685412
Filing Date: 2004-02-03
Classification: B25B,F16B

Abstract:
A fastener system comprising:a fastener with a torque driving recess comprising a central recess defining a peripheral surface having from 2 to 5 curved grooves spaced on it equally and so that the grooves do not intersect each other, but intersect the peripheral surface to define for each groove, an arc of the peripheral surface, and wherein adjacent pairs of grooves form an internally projecting land, each land defining a first distance on the peripheral surface between each adjacent pair of grooves each said are defining a second distance which is between one land and the next respective land, the first distance being less than the second distance, and where the driving recess has a longitudinal axis along its depth and where the driving recess is substantially constant in cross section along at least a portion of its length; and a torque driving tool having a torque driving tip having a cylindrical central core bounded by an equally spaced series of rounded longitudinally extending lobes which intersect the circumference of the central core whereby the tip has a configuration which mates with the configuration of the torque driving recess.