Torque limiting elastomeric fastener for screw threaded member

Details Torque limiting elastomeric fastener for screw threaded member Torque limiting elastomeric fastener for screw threaded member

1981-03-20

1984-09-18

Holko, Thomas J.

Expanded, threaded, driven, headed, tool-deformed, or locked-thr

Headed fastener element with nut, washer, securing means or cap

Headed bolt or screw with threads and complementary nut

29526R, 36134, 411392, 411411, 411429, 411435, 411907, F16B 3714

Patent

active

044720980

ABSTRACT:
Torque limiting clamping means comprises a cylindrical unthreaded screw-thread engaging clamping member of elastomeric material screwed on a rigid screw threaded member at an interference fit. The interference fit, the pitch and dimensions of the screw thread, and the physical characteristics of the elastomeric material are preselected to enable deformation of the elastomeric material resiliently within its elastic limit into the thread groove of the rigid member to accommodate the interference fit and to cause screw induced relative axial movement of the members to a limit of axial travel, whereupon the elastomeric material flows axially across the screw thread to terminate the axial travel and to effect a resilient reaction against the screw thread which results in an axial clamping force and a radial thread-locking force against the thread predetermined by the maximum allowable torque. Upon unscrewing of the members from each other, the elastomeric material returns essentially to its initial undeformed condition for reuse.

REFERENCES:
patent: 3030997 (1962-04-01), Collins
patent: 3273441 (1966-09-01), Biesecker
patent: 4114506 (1978-09-01), Aimar

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