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US 5,702,217 AGranted
Braking nuts or screws and mountings obtained with same devices
AssigneeSociete Nationale d'Etude et de Construction de Moteurs d'Aviation "S.N.E.C.M.A."
InventorsJean-Louis Charbonnel, Michel Franchet, Jacky Serge Naudet
Life of this patent
Estimating the term…
Abstract
Screw or nut braking rings and mountings established with the rings include a nut having an upper portion hollowed from a circular throat. Slits divide the upper portion into blocks by cutting the throat. A shape-memory alloy ring is housed in the throat so as to retighten the blocks on the threaded portion of the mounting and thus tighten it. The ring exhibits a change between the tightening state and a mounting state where it is free in the throat and can be easily mounted.
Claims1
An assembly comprising:
- a nut and a ring having a width parallel to the diameter of the ring and a height perpendicular to the diameter of the ring, the nut comprising a circular throat positioned near an axial end of the nut, the nut further comprising at least one arc which defines a circle-shaped notch in the throat, the ring being inserted in the throat and being made of a shape-memory material, wherein the ring undergoes only an increase of height so as to widen the notch on a temperature change from a mounting state to a working state.
Dependencies are inferred from the claim text.