Nut device having an automatic positive locking

F - Mech Eng,Light,Heat,Weapons – 16 – B

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F16B 37/00 (2006.01) B25B 13/06 (2006.01) F16B 39/10 (2006.01) F16B 39/38 (2006.01)

Patent

CA 1237305

NUT DEVICE HAVING AN AUTOMATIC POSITIVE LOCKING ABSTRACT OF THE DISCLOSURE The device has a screwthreaded collar 9 constituting a brake and trapped in a cavity 5 of a nut 2 with respect to which it is connected to rotate and axially movable in the cavity between a first position in which its screwthread 12 is in phase with the screwthread 3 of the nut and a second position in which the screwthreads are no longer in phase. The collar has a device 13 adapted to cooperate with a complementary device 34 of a shaft 18 on which the nut is screwed so as to be immobilized in rotation on this shaft when the screwthreads of the collar 9 and the nut 2 are no longer in phase. For mounting the nut device, a tool is provided which comprises a hollow sleeve 20 defining a cavity adapted to receive the nut 2, an arrangement 29 for retaining the nut in a resilient manner and an arrangement 32 for maintaining the collar 9 in the first position at the inner end of the cavity 5 in opposition to the action of the second ring 15 when the nut is retained in the sleeve.

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