Anchoring device

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element – Having resilient securing structure on shank

Patent

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Details

411456, 411514, 411913, F16B 1506, F16B 1900

Patent

active

050355597

ABSTRACT:
An anchoring device having a head and a shank integral with the head and adapted to be forcibly driven into a hole having a cylindrical wall defined within a body of concrete, masonry, or like material. The shank has a spring temper and has a proximal portion, a distal portion, and a transitional portion joined to the proximal portion at a proximal elbow and to the distal portion at a distal elbow. Each such portion is substantially straight when the shank is unstressed. The shank has a substantially uniform, substantially circular cross-section, except at the elbows, where the shank has smaller cross-sections causing the shank to be preferentially bendable at the elbows. Each of the proximal and distal portions has an axial length equal to at least approximately twice its diameter. The transitional portion has an axial length approximately equal to its diameter. The distal portion facilitates initial entry of the shank into the hole. The distal and transitional portions act as lever arms bearing at the elbows and against the cylindrical wall of the hole as the shank is driven further into the hole.

REFERENCES:
patent: 1574790 (1926-03-01), Carroll
patent: 4828445 (1989-05-01), Giannuzzi

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