Attachment unit including nail and sleeve

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Member preassembled with substructure at through-passage or...

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Details

411441, 411480, F16B 3900, F16B 502

Patent

active

048028029

ABSTRACT:
An attachment unit is made up of a nail and a sleeve fitted onto the nail. The nail has an axially elongated shank with a head at one end. The sleeve has a first axially extending section followed by a second axially extending section with the second section located closer to the head. A flange is located at the end of the first sleeve section spaced from the second sleeve section. An exterior thread with a root diameter is formed on the first sleeve section. The second sleeve section has a outside diameter smaller than the root diameter of the thread. When the nail is driven into a receiving material, its head runs into and laterally deforms the second sleeve section. After the nail is driven in, a nut can be placed over the second sleeve section and threaded onto the exterior thread.

REFERENCES:
patent: 2718485 (1955-09-01), Samuely
patent: 3377903 (1968-04-01), Korte
patent: 4102238 (1978-07-01), Thurner

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