| 摘要 |
An omni-positional hoist ring assembly including a bushing element that includes a sleeve with an axial length, and proximal and distal ends. A load bearing flange is radially disposed about the proximal end of the sleeve. The sleeve has an internal thread extending at least part way of the axial length of the sleeve. A mounting screw element has a major axis, a head, and a shank disposed generally co-axially around the major axis. The shank includes a threaded shank portion and a bearing portion. The bearing portion is a generally cylindrical axially extending portion of the shank that has a diameter approximately equal to the minor diameter of the thread in the threaded shank portion. A thrust washer element is provided between the head and the distal end of the sleeve. A body element receives the in-turned opposed ends of the legs of a lifting loop element in sockets. The lifting loop is free to pivot. The body element is free to rotate about the sleeve, so the lifting loop will self align with a load that is applied to it from any direction within a hemisphere centered on the major axis of the mounting screw element. The elements of the hoist rig assembly are assembled by aligning them and inserting the mounting screw element into the sleeve and threadably advancing it until the bearing is aligned with the internal thread so further rotation of the mounting screw element does not threadably advance the mounting screw element relative to the sleeve.
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