1975-09-17
1976-12-14
Britts, Ramon S.
10 86F, F16B 3700
Patent
active
039968340
ABSTRACT:
Disclosed herein is a fastening element which is susceptible of forming a fastener assembly by engagement with a self-tapping screw. An oblique rib is formed within a bore within a blank, or other structural element, close to the end of the bore. The rib is thus oriented at an angle with respect to the axis of the bore. The result is a rib of substantially eliptical configuration protruding radially inwardly into the bore exclusively from locations along a substantially elliptical closed-loop line upon the cyindrical surface of the bore, the closed-loop line having two turning points of reversal in axial direction component by virtue of the closed-loop line returning into itself. Also disclosed is a void in the rib, and dimensions of the fastener relative to standard externally threaded fasteners which are preferred for high strength and easy driving.
REFERENCES:
patent: 1977861 (1934-10-01), Pond
patent: 3010126 (1961-11-01), Willcox
patent: 3263949 (1966-08-01), Conrad
patent: 3314326 (1967-04-01), Bedford
patent: 3364807 (1968-01-01), Holton
patent: 3388732 (1968-06-01), Holton
patent: 3583274 (1971-06-01), Duffy
Britts Ramon S.
Ellingsberg Donald J.
Litton Systems Inc.
Zentner Richard
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