Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Design of fastener or substructure restricts rotation
Patent
1982-10-18
1985-06-18
Holko, Thomas J.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Design of fastener or substructure restricts rotation
411186, 411437, 411 82, 174 52H, F16B 3706, H01B 734
Patent
active
045238839
ABSTRACT:
The invention includes a method and a fastener for use in attaching articles to printed circuit boards. The fastener, which has a generally tubular body, flanged at one end, is adapted to receive a screw. The fastener has a polygonal cross-section over a portion of its length. The flange which is located at one end of the tubular body, has an integral spring washer and includes indentations which allow solder to flow from one side of the printed circuit board to the other. The fastener with its integral spring washer provides improved clamping characteristics and avoids problems associated with large coefficients of thermal expansion of printed circuit board material in a direction perpendicular to the board.
REFERENCES:
patent: 1229911 (1917-06-01), Dodds
patent: 1931649 (1933-10-01), Eger
patent: 2305654 (1942-12-01), Wilkinson
patent: 3350975 (1967-11-01), Bien
patent: 3415943 (1968-12-01), Meyerhoff
patent: 3457824 (1969-07-01), Derby
patent: 4403102 (1983-09-01), Jordan et al.
Peterson Francis C.
Rodseth William G.
Spring William A.
Buckman Thomas W.
Holko Thomas J.
Illinois Tool Works Inc.
Roche David I.
Wilson Neill
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