Patent ID: 6679658
Filing Date: 2004-01-20
Classification: B25F,Y10T

Abstract:
A combined rotary hand tool and accessory attachment, comprising:a rotary hand cool having an output shaft and a nose end associated with said shaft; an accessory attachment having a mounting portion configured for releasable attachment to said nose end; an accessory formation provided on said nose end and said mounting portion and configured so that said mounting portion is securable upon said nose end upon an approximate Â¼ relative rotation; said engagement formation includes at least one tooth with a middle portion and a pair of ends, said middle portion being curved in the direction of a longitudinal axis of the tool so that said middle portion is farther from an end of said nose than said ends of said at least one tooth; said at least one tooth defining a track for engagement of a corresponding member of the other of said nose end and said mounting portion so that upon engagement in said track, and rotation of said attachment relative to said engagement formation said approximate Â¼ relative rotation, said member moves from said end of said at least one tooth to said middle portion and thus is axially displaced away from said end of said nose.