Patent ID: 6735876
Filing Date: 2004-05-18
Classification: B23D,Y10T

Abstract:
An apparatus for affixing a blade having a pair of side projections to a drive shaft of a tool, comprising:a rod arranged and constructed for attachment to a lower end of the drive shaft, the rod having a blade slot arranged and constructed to receive a base end of the blade so that a longitudinal axis of the blade aligns with a longitudinal axis of the drive shaft, the rod also having an aperture disposed substantially perpendicular to the blade slot and communicating with the blade slot, a blade guide rotatably mounted on the rod, the blade guide having a blade slot arranged and constructed to allow the blade projections to pass therethrough, wherein a cam surface is defined on at least a portion of an inner surface of the blade guide, a first stopper projecting from either one end of the cam surface or an outer surface of the rod, the first stopper defining a blade replacement position, and a pushpin slidably disposed within the rod aperture, the pushpin having a head portion slidably contacting the cam surface of the blade guide, thereby influencing the position of the pushpin with respect to a direction perpendicular to the longitudinal axis of the rod, wherein the pushpin is arranged and constructed to contact the first stopper and prevent the blade guide from pivoting beyond the blade replacement position.