Patent ID: 11972701
Assignee: nan
Field: Audio-visual technology (Electrical engineering)
Classification: CPC G | IPC G

Claim 3:
4. The device of claim 2, wherein the hook further includes in its rear long leg: an eyebolt that Is screwed firstly into a lock nut then into a boss-nut which has been welded to the exterior surface of the rear long leg, and concentrically over a hole of adequate diameter that penetrates through this surface; a T-nut with a flange and a modified shank into which the eyebolt is screwed and liquid welded, this shank forming a close fitting axle to a circular metal disc, to which two circular metal washers of inside diameter also closely fitting over the shank have been welded concentrically to the circular metal disc, one on each side thereof; a jam nut, liquid welded flush to the end of the eyebolt, such that there is ample freedom of rotational motion of the circular metal disc and washers between the flange of the T-nut and the jam nut; a removable circular polymer disc pad with diameter equal to that of the circular metal disc and attached to it by removable means.