Patent ID: 7137329
Filing Date: 2006-11-21
Classification: B23D,B27B,F16D,Y10S,Y10T

Abstract:
1. A kick-back prevention coupler for removably coupling a table saw blade to a table saw assembly, said coupler including: an elongated rod having a first end and a second end, said second end being mechanically coupled to the table saw assembly such that the table saw assembly may selectively rotate about a longitudinal axis of said rod, a peripheral flange being integrally attached to said rod and being positioned between first and second ends of said rod, said flange having a plurality of ball bearings therein, each of said ball bearings having a diameter greater than a width of said flange measured from said first side to said second side, said outer surface of said rod being threaded, said rod having an outer surface having plurality of elongated slots therein, said slots extending from said first end to said flange; a first washer being rotatably positioned on said rod and abuts said second side of said flange, said first washer has a distal side and a proximal side with respect to said flange, said proximal side having a plurality of depressions therein, each of said depressions being positioned for removably receiving one of said ball bearings, wherein said rod is removably extended through the saw blade such that the saw blade abuts said distal side of said first washer; a first fastener being threadably coupled to said rod and abutted against the saw blade such that the saw blade is positioned between said first fastener and said first washer; a second washer being rotatably positioned on said rod and being abutted against said first side of said flange; a biasing assembly being removably positioned on said rod between said second washer and said first end of said rod and being adapted for biasing said second washer against said flange, said second washer biasing each of said ball bearings into one of said depressions, wherein an amount of force being applied on said second washer by said biasing assembly may be selectively adjusted; said biasing assembly including; a third washer being positioned on said rod and abutting said inner surface of said second fastener, said third washer having an inner perimeter having a plurality of protuberances attached thereto, each of said protuberances being positioned for being positionable in one of said slots, said third washer having a plurality of wells therein, each of said wells being positioned for receiving one of said bearings mounted in said inner surface of said second fastener; and wherein said rod will rotate freely of said first washer and the saw blade when rotation of the saw blade is arrested by an item being cut by the saw blade.