Expanded – threaded – driven – headed – tool-deformed – or locked-thr – Torque responsive nut or bolt driving connection – Resilient connection
Patent
1986-05-02
1987-09-08
Smith, Gary L.
Expanded, threaded, driven, headed, tool-deformed, or locked-thr
Torque responsive nut or bolt driving connection
Resilient connection
411105, F16B 3100
Patent
active
046920757
ABSTRACT:
A screw-type fastener comprising two cooperable assemblages for releasably securing a panel having one of said assemblages to an underlying support structure such as a sub-panel or other framework having the other assemblage. The said other assemblage of the fastener comprises a tubular housing enclosing a screw member which projects forwardly to an open end of the housing, toward the opening thereof. The said one fastener assemblage comprises a floating stud body carried by the panel and having an internally threaded bore which is adapted to receive the screw member when the stud body is applied thereto. The housing has ratchet rings encircling the screw member, provided with opposed faces containing sloped radial teeth which engage one another. One ring is keyed to rotate with the stud body, and the other is keyed for longitudinal non-rotary movement in the housing. A spring in the housing maintains the rings in contact. The screw member is mounted for floating, turning movement in the housing, and is yieldably restrained by a unidirectional or non-reversing rotary detent as the stud body advances on the screw until a predetermined torque is reached. Thereafter the detent yields in the manner of a one-way ratchet or overload clutch to enable the screw member to turn with the stud body when the fastener is completely pulled up, thereby preventing overtightening. The limiting of the torque eliminates personnel-related error or misjudgements. Reverse turning of the stud body unscrews it from the screw member in a positive manner due to the one-way or non-reversing action of the detent.
REFERENCES:
patent: 2745303 (1956-05-01), Cornelius
patent: 3289726 (1966-12-01), Sauter
patent: 3294140 (1966-12-01), Cosenza
patent: 3404716 (1968-10-01), Cosenza
Lehmann H. Gibner
Lehmann K. Gibner
Norco,Inc.
Smith Gary L.
Whitecomb, Jr. Adrian H.
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