Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Member or portion thereof located between substructure and...
Patent
1980-11-03
1983-04-19
Shedd, Wayne L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Threaded fastener locked to a discreet structure
Member or portion thereof located between substructure and...
411531, F16B 2107
Patent
active
043804136
ABSTRACT:
A plastic load-distributive washer for use with compressible materials. An axial projection has a laterally extending external flange and an internal throughbore. A portion of the throughbore has a lateral dimension exceeding the maximum lateral dimension of a fastener head with which it is used and an axial length which is at least several times the height of the fastener head. The washer is free to float with the compressible material subject to loading while the fastener remains unmoved. The washer may also be provided with a flexible snap ring to limit the amount of relative movement and a plurality of one-way fingers which cooperate with projections on the head to restrict relative rotational movement between the washer and fastener in the removal direction.
REFERENCES:
patent: 212549 (1879-02-01), Gear
patent: 1286862 (1918-12-01), Williams
patent: 3088361 (1963-05-01), Hallock
patent: 3090203 (1963-05-01), Durget
patent: 4030261 (1977-06-01), Coleman
patent: 4074501 (1978-02-01), Sandquist
Buckman Thomas W.
Illinois Tool Works Inc.
Roche David I.
Shedd Wayne L.
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