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1. (WO2018053155) DRIVE SYSTEM WITH FULL SURFACE DRIVE CONTACT

Pub. No.:    WO/2018/053155    International Application No.:    PCT/US2017/051602
Publication Date: Fri Mar 23 00:59:59 CET 2018 International Filing Date: Fri Sep 15 01:59:59 CEST 2017
IPC: F16B 23/00
F16B 35/06
F16B 35/04
Applicants: ACUMENT INTELLECTUAL PROPERTIES, LLC
Inventors: GOSS, David, C.
Title: DRIVE SYSTEM WITH FULL SURFACE DRIVE CONTACT
Abstract:
A drive system with full surface drive contact. The drive system tends to maximize the surface contact pattern or area at typical bit-recess reaction (drive) torque values, thereby tending to minimize bit-recess surface contact stresses, coating damage, recess ream and premature bit fatigue failure. The drive system comprises a fastener and/or bit having drive surfaces formed of either polygon involutes or a single arc construction. A punch is also provided for forming a recess in either the fastener or the bit, wherein the punch has corresponding surfaces.