Fastening tools

Claim 1

A crimp lock fastener tool for joining a swageable collar to a bolt having a threaded shank to secure workpieces therebetween comprising: A. a stationary housing having a cylindrical opening axially aligned and communicating with a frusto conical opening, the small base of which is diametrically constant and adjacent the cylindrical opening to form a passageway therethrough; B. a floating split collet freely positioned within said passageway, said collet having an outer surface shaped similar to said passageway, a counterbore at a forward end thereof to accommodate the swageable collar, a central bore therethrough communicating with said counterbore, said bore reduced in cross section by an inclined surface terminating in a cutting edge and extending between the counterbore and the aperture; C. chuck jaws having an inclined forward section and adapted to grippingly engage said bolt shank; and D. a drawbar extending into said central bore and having a forward sloped surface to slantingly engage the inclined forward section of the chuck jaws so that a tensile force on the drawbar causes a rearward movement of the drawbar which engages and rearwardly moves the chuck jaws and thereby the bolt, said frusto conical sections of the stationary housing and the outer surface of the collet interacting to rearwardly move the collet and to reduce the cross section of the counterbore causing the collar to be swaged onto the bolt shank and the cutting edge to penetrate the shank and shear it adjacent to the swaged collar.