B - Operations – Transporting – 23 – P
Patent
B - Operations, Transporting
23
P
85/80
B23P 11/02 (2006.01) F16B 37/12 (2006.01) F16B 39/02 (2006.01) F16B 39/32 (2006.01)
Patent
CA 1251346
ABSTRACT OF THE DISCLOSURE The invention provides a caged nut comprised of stacked conical spring segments that automatically and positively self-locks when tightened to a selected pre-loading, without adjustment. The nut is free running until seated, and the automatic lock mechanism ratchets freely with respect to the cage while the nut is being run down to its sealed position. Reverse rotation of the cage is prevented, however. A ratcheting element in the automatic lock mechanism allows the nut to be tightened by free rotation in the "on" direction but the ratchet prevents rotation in the "off" direction. At whatever value of preload desired, the nut is tightened to the extent necessary to provide that pre-load and the automatic lock mechanism will lock it positively in that position. The invention also includes a caged nut having stacked conical spring washer segments in which the segments are so formed as to provide a more uniform thread loading, over the entire length of the threaded portion of the segments. The invention further includes a caged free-spinning nut characterized by a prevailing tongue resisting counter-rotation having at least two washer segments in which one of the segments is formed of a material which takes a permanent set upon loading and the other segment is formed of a material that returns substantially to its original form following release of the loading force.
385934
Gowling Lafleur Henderson Llp
Reynolds Richard L.
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