Patent ID: 7625155
Filing Date: 2009-12-01
Classification: E21D

Abstract:
1. A bolt assembly for use with cables to support mine roofs, comprising: a tension cylinder, the tension cylinder comprising an interior channel and a threaded exterior surface, wherein the exterior surface has one or more indentations extending radially inwardly, wherein the channel and the indentations extend along a longitudinal axis of the tension cylinder, and wherein the channel is sized to receive and accommodate a cable without being affixed or secured thereto, thereby allowing the tension cylinder and the cable to rotate independently of one-another; a tension nut comprising a threaded interior surface complementary to the threaded exterior surface of the tension cylinder, wherein the tension nut is rotatable about the tension cylinder; and a roof bearing plate comprising an aperture therethrough, said aperture sized to receive and accommodate the tension cylinder, wherein said plate has one or more extending surfaces at and extending radially into the aperture thereof, sized and positioned to fit within the indentations of the tension cylinder.