Fastener with cam engagement

Joints and connections – Including ancillary means blocking disconnection of joint – Cam or thread lock

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Details

4034081, 4034091, 403DIG8, 411433, 411278, F16B 3708

Patent

active

060536551

ABSTRACT:
A fastener comprises a nut surrounding a collar that in turn surrounds a t, the nut and collar holding a bracket element against a mounting surface. The collar fits closely but slidably within the nut. Of the nut or collar, one has a boss that rides upon a cam surface of the other, so that a camming relation exists between the nut and collar. Turning the nut relative to the collar will thus squeeze the collar into an interference fit with the post so that the fastener attains a locking configuration. A groove adjacent the cam surface accepts the projection and retains it such that the fastener maintains its locking condition. A predetermined torque is needed to rotate the projection to the groove, whereby the fastener is a torque controlled fastener.

REFERENCES:
patent: 4462731 (1984-07-01), Rovinsky et al.
patent: 5921734 (1999-07-01), Kataoka

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