F - Mech Eng,Light,Heat,Weapons – 16 – B
Patent
F - Mech Eng,Light,Heat,Weapons
16
B
85/16
F16B 15/06 (2006.01)
Patent
CA 1099962
Abstract of the Disclosure A sheet metal mounting screw and method of forming the same is disclosed. The screw is formed from a single flat blank of sheet metal having a generally T-shaped head and a slotted shank or barrel. The shank, when folded, is tubular and has a seam extending along one side, with spaced resilient teeth extending outwardly from opposite sides thereof. The teeth have inclined outer edges arranged in a helical path extending lengthwise around the shank in staggered relation to one other, for engagement with either tapped or untapped openings in a support. The teeth are resilient and permit a push-in insertion of the threaded shank in the helically threaded opening. The T-shaped head is formed integrally with the shank and contains a tool-receiving slot, which permits the screw to be turned angularly in tightening or removing the screw. In forming the screw, a T-shaped blank is cut from a sheet of resilient metal. The spaced teeth are cut from the shank and are bent outwardly. Upper ends of the teeth are inclined and are arranged in a helical path around the shank for engagement with the threaded opening in the support. The shank is rolled into a tubular form with a tapered lower - 1 - extremity which enters the opening in the support. The T-shaped upper end of the blank is then folded to form the head of the screw with the slot therein extending trans- versely of the shank. The sides of the T-shaped bend are folded to form supports extending along opposite sides thereof.
291745
Gowling Lafleur Henderson Llp
Leviton Manufacturing Co. Inc.
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