Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Penetrating pin securing means
Patent
1985-12-12
1987-04-07
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Penetrating pin securing means
411140, 411448, F16B 1500
Patent
active
046556591
ABSTRACT:
A fastener for securing two pieces of roofing material includes an elongated member having a pointed tip end and a flange like head end. The elongated member includes an internal channel that extends substantially the entire length of the member and terminates in an opening in the head and a double faced ramp at the tip. A plunger and flexible barb are disposed for longitudinal movement within the channel and the elongated member contains a pair of sidewall openings located proximate the ramp and communicating with the channel. The openings are provided with barb directing surfaces that engage the barb and cause it to move in a direction substantially perpendicular to the longitudinal axis of the channel as the barb exits the opening. The opening is also provided with a barb engaging surface that produces a frictional drag on the barb causing it to curl as it exits the opening.
REFERENCES:
patent: 641191 (1900-01-01), Champion
patent: 669077 (1901-03-01), Durgoraw
patent: 1428111 (1922-09-01), Molesworth
patent: 1525822 (1925-02-01), Nalle
patent: 1548456 (1925-08-01), Goodman
patent: 4242932 (1981-01-01), Barmore
patent: 4361997 (1982-12-01), DeCaro
Smith Gary L.
Wilson Neill
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