Fastener

Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Threaded fastener locked to a discreet structure – Nut – and means to engage substructure on its opposite faces...

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Details

411187, F16B 3704

Patent

active

046277765

ABSTRACT:
An improved fastener includes a shank section which extends outwardly from a head section. The head section has a rim with an inner side surface which cooperates with an outer side surface of the shank section to form a groove. The inner side surface of the rim includes a plurality of indentations which are separated by side surfaces. The outer side surface of the shank section also includes a plurality of indentations which are separated by side surfaces. The side surfaces on the rim are disposed radially outwardly of the indentations in the shank section and cooperate with the shank section to form a plurality of constrictions. Similarly, the indentations in the rim are disposed outwardly of the side surfaces of the shank section and cooperate with the side surfaces of the shank section to form a plurality of constrictions. The constrictions apply deformation forces to material on which the fastener is mounted upon application of torque load to the fastener. The indentations in the rim and shank section of the fastener apply shear forces to the material of the member upon the application of torque loads to the fastener.

REFERENCES:
patent: 3253631 (1966-05-01), Reusser
patent: 3270355 (1966-09-01), Tildesley
patent: 3754677 (1973-08-01), Hug
patent: 3878599 (1975-04-01), Ladouceur
patent: 4389766 (1983-06-01), Capuano
patent: 4432681 (1984-02-01), Capuano
patent: 4468161 (1984-08-01), Krueger

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