Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Internally threaded fastener element – e.g. – nut – etc. – Thread structure
Patent
1985-11-27
1988-04-12
Pate, III, William F.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Internally threaded fastener element, e.g., nut, etc.
Thread structure
411433, 411434, F16B 3710
Patent
active
047370599
ABSTRACT:
There is disclosed an easily releaseable, internally threaded fastener having at least one axial slot which extends substantially through the wall of the fastener. The external wall of the fastener is non-cylindrical, e.g. hexagonal, or three-lobed, to permit the application of a fastening torque to the fastener. The fastener is surrounded by a retainer sleeve having a mating, internal wall portion which provides hoop strength to the fastener. The retainer also has an annular recess in its internal wall whereby the retainer can be slid axially, or rotated, to release the fastener. The fastener assembly includes a metal spacer seated in each axial slot of the fastener to permit the even transmission of the fastener application torque. In preferred embodiments, the fastener is formed by cutting several axial slots through the body of the fastener, but terminating short of severing the threads, thereby providing a fastener which, when released by the retainer, will yieldingly fail, thus avoiding the mechanical shock of release which is experienced upon the release of separate fastener segments.
REFERENCES:
patent: 2828662 (1958-04-01), Antal
patent: 3170363 (1965-02-01), Dickie
patent: 3334536 (1967-08-01), Armstrong
patent: 3813984 (1974-06-01), Selinder
patent: 3952626 (1976-04-01), Townsend
patent: 4082468 (1978-04-01), Von Base
Pate III William F.
Smith Creighton
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