Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Headed fastener element with nut – washer – securing means or cap – Headed bolt or screw with threads and complementary nut
Patent
1984-01-27
1986-12-23
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Headed fastener element with nut, washer, securing means or cap
Headed bolt or screw with threads and complementary nut
411533, F16B 4300
Patent
active
046309845
ABSTRACT:
An assembly for fastening a compressible layer of insulation includes a threaded screw projecting through the center of a flat circular disk of a resilient plastic material. A central hub on the disk is received between the head and a flange spaced below the head to hold the disk adjacent the head, the hub being defined in part by resilient fingers which flex outwardly to let the flange pass through the hub as the screw and the disk are assembled together. An annular surface is formed on the underside of the disk at the periphery thereof to engage the insulation and ribs which decrease in width are formed on the underside of the disk and project radially from the hub to the peripheral surface so that an uplift force causes the disk to flex upwardly progressively from the periphery toward the center.
REFERENCES:
patent: 1885761 (1932-11-01), Peirce
patent: 1953592 (1934-04-01), Deniston
patent: 2488796 (1949-11-01), Baier
patent: 2538396 (1951-01-01), Sutin
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patent: 2943373 (1960-07-01), Rapata
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patent: 4361997 (1982-12-01), DeCaro
patent: 4380413 (1983-04-01), Dewey
patent: 4391559 (1983-07-01), Mizusawa
patent: 4435112 (1984-03-01), Becker
Sketch of disk manufactured by The Tru-Fast Corp., Bryan, Ohio.
Reinwall Ernest W.
Spibey John
Elco Industries, Inc.
Smith Gary L.
Whitcomb, Jr. Adrian H.
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