Nail fastener assembly

Details Nail fastener assembly Nail fastener assembly

1992-10-19

1993-11-16

Wilson, Neill R.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Impact driven fastener, e.g., nail, spike, tack, etc.

Having means to facilitate explosive driving

411480, 411923, F16B 1500, F16B 1502

Patent

active

052617700

ABSTRACT:
A nail fastener assembly for attaching thin metal sheets includes an axially extending nail with a conically shaped shank having ballistic-like tip at its leading end and a head at its trailing end. A disk is fitted on the leading end of the shank with a sleeve secured on the shank between the disk and the head. When the nail is driven by a setting tool, the sleeve acts on the disk in the region of the tip, so that the transmission of all forces acts on an annular radially outer surface on the leading surface of the disk. The leading end surface of the disk has a radially inner conically shaped first recess and an annular second recess encircling the outer edge of the first recess and spaced inwardly from the radially outer edge of the disk. Accordingly, the radially outer contact surface bears against the metal sheet being attached and provides high transverse stresses.

REFERENCES:
patent: 3921495 (1975-11-01), Braun et al.
patent: 4802802 (1989-02-01), Thurner
patent: 4915561 (1990-04-01), Buhri et al.
patent: 4948312 (1990-08-01), Jochum
patent: 5054983 (1991-10-01), Froewis et al.

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