초록 ▼

The blocking system comprises a first interface element adapted to cooperate with a first of two bodies; a second interface element adapted to cooperate with the second of the two bodies; blocking element adapted to cooperate with the interface elements to ensure temporary blocking and comprising a

The blocking system comprises a first interface element adapted to cooperate with a first of two bodies; a second interface element adapted to cooperate with the second of the two bodies; blocking element adapted to cooperate with the interface elements to ensure temporary blocking and comprising a frangible zone; a rupture device consisting of a shape memory alloy adapted to be deformed by elongation through heating to break the frangible zone, by which the second body becomes free to move relative to the first body; and heating element adapted to heat the rupture device beyond the critical temperature to cause the shape memory alloy to be deformed. A redundancy of heating element may be provided, as well as a retraction of at least part of the blocking element in a housing defined by one of the interface elements. The invention is useful for blocking the displacement of a tilting platform with respect to a fixed platform in the field of space applications.

대표청구항 ▼

[ What is claimed is:] [1.]1. A system for temporarily immobilizing two bodies relative to each other at least one way in a predetermined direction, comprising:a first interface part adapted to cooperate with a first body;a second interface part adapted to cooperate with a second body,an immobilizin

[ What is claimed is:] [1.]1. A system for temporarily immobilizing two bodies relative to each other at least one way in a predetermined direction, comprising:a first interface part adapted to cooperate with a first body;a second interface part adapted to cooperate with a second body,an immobilizing device having a rupture area and adapted to cooperate with the first and second interface parts to assure a temporary immobilization of the two bodies, wherein the two bodies are held apart by a first distance before the rupture area ruptures and are retracted toward each other immediately once the rupture area ruptures to enable relative movement of the two bodies, at least over part of said first distance;a rupture member made of a shape memory alloy adapted to deform when heated to rupture the rupture area; anda heating device adapted to heat said rupture member above a critical temperature to cause the shape memory alloy to deform.