Patent ID: 6244139
Filing Date: 2001-06-12
Classification: B25B

Abstract:
An adjustable shifter for controlling the racing of a slidable ratchet shank comprising:a tubular handle having an opening in a front end thereof;a shank inserted into the opening of the handle and having a socket wrench in a front end, a first flange at a rear end, a ratchet portion on an outer periphery abutting the rear end and a sliding portion on an outer periphery abutting the front end including a plurality of small annular grooves formed spaced apart;a sleeve member wrapped on the shank having a first reduced rear end frictionally engaged into the opening of the handle and stopped against the flange of the shank, a large annular groove abutting the rear end, a thru hole in the large annular groove, a pair of concaves formed in opposing outer peripheries, a first central bore slidably engaged with the shank and a large opening in front end communicating with the central bore;an elastic clamp disposed into the large annular groove of the sleeve member having a protrudent thru hole in a center thereof engaged with the thru hole of the sleeve member;a shifter having a turning button on top and a bevel pawl at lower end inserted into the sleeve member via the thru holes of the clamp and the sleeve member and engaged with the ratchet portion of the shank;a first spring means biasing the shifter inside said sleeve member;a ferrule member wrapped on said shank having a second flange engaged into the large opening of said sleeve member, a first projection projected downward from a lower outer periphery and a second central bore engaged with the first central bore of said sleeve member;a chuck member wrapped on said shank and positioned at an outmost position on said shank having a second reduced rear end frictionally disposed into the large opening of said sleeve member positioned between the first projection of the ferrule member and an inner periphery of the large opening, a first notch in an upper periphery of the second reduced rear end, a second notch in a lower inner surface abutting a lower inner periphery of the second reduced rear end, and a third central bore engaged with the second central bore of the ferrule member;a catch ring slidably disposed between said chuck member and said ferrule member having a L-shaped press plate projected upward from on upper outer periphery and engaged into the first notch of said chuck member and a second projection protected downward from a lower outer periphery and biased by a second spring means against a lower inner periphery of the second reduced rear end of said chuck member.