초록 ▼

To command notably the unclamping and the separation of two components, on a spacecraft, such as a satellite or a probe, a single actuation pushing device (10) is driven by a form memory device (36) positioned in a casing (12), between a wall (18) of the latter and a boss (24). It is linked to a hea

To command notably the unclamping and the separation of two components, on a spacecraft, such as a satellite or a probe, a single actuation pushing device (10) is driven by a form memory device (36) positioned in a casing (12), between a wall (18) of the latter and a boss (24). It is linked to a heater (38). A system to prevent mistakes (20, 26, 32), sensitive to a displacement of the component (24) caused by an elongation of the device (36), prevents assembly of the pushing device (10) when it has already been actuated.

대표청구항 ▼

[ We claim:] [1.] A single actuation pushing device including:two annular components forming bosses;an annular device, made of a material with form memory under compressive prestress, positioned between the two annular components;means of heating the annular device, capable of causing an elongation

[ We claim:] [1.] A single actuation pushing device including:two annular components forming bosses;an annular device, made of a material with form memory under compressive prestress, positioned between the two annular components;means of heating the annular device, capable of causing an elongation of this device;means of thermally insulating the annular device;casing means, surrounding the annular device and the heating means;means of fixing the pushing device onto an external component;means of linking the annular components, normally holding them pressed against the annular device, before the elongation of that device, these linking means being automatically disconnected, by the effect of the elongation of the annular device;means of preventing mistakes which are sensitive to the state of the linking means in order to prevent use of the fixing means when these linking means are disconnected by the effect of the elongation of the annular device.