Memory metal article

Details Memory metal article Memory metal article

F - Mech Eng,Light,Heat,Weapons

16

L

148/30, 285/62

F16L 21/00 (2006.01) C22F 1/00 (2006.01) F16B 1/00 (2006.01)

Patent

CA 1077991

ABSTRACT The effective transition temperature from martensite to austenite in a dimensionally heat-recoverable memory metal member can be temporarily raised by applying a stress and maintaining the applied stress at a tempera- ture below the raised transition temperature so that the memory metal remains substantially in the martensitic state. When it is desired to utilise the member the stress is removed at a temperature above the original transition temperature. The applied stress is advantageously maintained by a disburdenable keeper. In an especially preferred embodiment the keeper comprises an aluminium tube positioned within a band or tube made from a brass memory alloy, the combined article being suitable as a connector for hydraulic pipes and the like.

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