Patent ID: 7189239
Filing Date: 2007-03-13
Classification: A61B,B23D,B27B

Abstract:
1. A saw blade comprising a blade body having a longitudinal axis; a cutting means disposed at a first end of said blade body; a prearranged hub section having an outer periphery located at a second end of said blade body, said prearranged hub section comprising said respective generally rectangular elongated blade driving enabling section of each slot being configured for engaging with at least one of a plurality of rectangular driving lugs terminating in a substantially rectangular outer end arranged in a pattern and a plurality of rectangular driving lugs terminating in a substantially circular outer end arranged in a pattern to drive said saw blade in response to a driving force therefrom and wherein said respective expanded bulbous blade driving disabling section of each slot is substantially oval shaped or substantially oval shaped having an indentation extending substantially perpendicular to the substantially oval shape and in a direction away from the hub center and dimensioned for disengaging from a plurality of circular driving pins arranged in a pattern disengaging over a predetermined range of a plus angle and a minus angle a driving force therefrom along a locus of points which avoids driving said saw blade in response to a driving force therefrom.