초록 ▼

An insert assembly includes a frustoconically shape cone nut (10), a cylindrical shell (20) and a bolt (36). The cone nut (10) has a longitudinal bore (12) which is tapped to accept the threads on the bolt. The shell (20) has projecting barbs (28) arranged in a helical pattern on the shell\s outer s

An insert assembly includes a frustoconically shape cone nut (10), a cylindrical shell (20) and a bolt (36). The cone nut (10) has a longitudinal bore (12) which is tapped to accept the threads on the bolt. The shell (20) has projecting barbs (28) arranged in a helical pattern on the shell\s outer surface. The assembly, comprising the bolt through the shell and threaded into the smaller diameter end of the nut cone, is driven into a bore in the work piece. The bolt is then rotated causing the cone nut to penetrate the shell resulting in radial expansion of the shell whereby the barbs become embedded in the work piece. A keying feature between the nut and the shell prevents nut rotation with the bolt.

대표청구항 ▼

A method for forming a threaded insert within a working material comprising the steps of: (a) providing a frustoconically shaped cone nut having a first diameter d1 at one end and a second diameter d2 at the other end, where d12, the cone nut being provided with a threaded, longitudinal bore; (b) pr

A method for forming a threaded insert within a working material comprising the steps of: (a) providing a frustoconically shaped cone nut having a first diameter d1 at one end and a second diameter d2 at the other end, where d12, the cone nut being provided with a threaded, longitudinal bore; (b) providing a cylindrically shaped shell, the shell being provided with a longitudinal bore of diameter ds, where d1s2, such that the shell is adapted to receive said first diameter d1 of the cone nut, the shell being radially expandable upon penetration of the cone nut, and the outer surface of the shell being provided with a series of barbs helically aligned with respect to the longitudinal axis of the shell; (c) providing a keying means between the cone nut and the shell such that the cone nut is prevented from rotation relative to the shell when the cone nut is received therein; (d) providing a predetermined diameter bore within the working material, said predetermined diameter being slightly smaller than the outer diameter of the shell; (e) inserting a bolt through the shell bore and into the cone nut at the first diameter end, the threads on the bolt mating with the threads provided in the cone nut, thereby forming an assembly; (f) inserting said assembly, second diameter end of the cone nut first, into the provided bore of the working material; and (g) tightening said bolt such that said cone nut is pulled into the shell thereby radially expanding the shell and causing said barbs to embed in the working material.