Coil spring for friction-lock mechanisms

Details Coil spring for friction-lock mechanisms Coil spring for friction-lock mechanisms

A - Human Necessities

47

C

A47C 1/027 (2006.01) B60N 2/20 (2006.01) E05C 17/30 (2006.01) F16B 7/14 (2006.01) E05B 15/00 (2006.01)

Patent

CA 2042326

ABSTRACT OF THE DISCLOSURE A mechanical lock having a housing and a rod axially slidable through the housing. A coil spring is arranged about the rod to engage the rod surface and thereby lock the rod against movement through the housing. The coil spring can be unwound to an unlocking condition of enlarged internal diameter sufficient to allow sliding movement of the rod. The rod surface is scored in a direction generally transverse to the rod axis and the coil spring has coil surfaces scored in a direction generally parallel to the scoring on the rod surface. Interlocking occurs between the rod and coil scored surfaces in the locking condition to enhance locking of the rod against axial movement through the coil spring.

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