Expander tool

In an expander tool, the combination including a cylindrical body comprised of at least eight circumferentially disposed separate segments defining an axial bore extending through said body, resilient means carried by said segments for maintaining said segments in expansible assembled relationship, said segments each having longitudinally and radially inwardly canted planar surfaces at each end thereof, an actuating member extending through said bore, said actuating member including a threaded portion and a smooth shank portion located at opposite ends of said body, combined expansion and clutch means including a first wedge member threadably engaging said threaded portion of said actuating member, said first wedge member having at least eight angularly spaced segmental pyramidal surfaces separated by at least eight equally angularly spaced segmental conical surfaces, said pyramidal surfaces on said first wedge member being engaged with said planar surfaces at one end of each of said segments, said combined expansion and clutch means also including a second wedge member slideably circumposed on said shank portion of said actuating member, said second wedge member having at least eight angularly spaced segmental pyramidal surfaces separated by at least eight equally angularly spaced segmental conical surfaces, said pyramidal surfaces on said second wedge member being engaged with the planar surfaces at the other end of each of said segments.