Attachment device using a shaped memory alloy for a cryogenic satellite tank

Attachment device for a cryogenic satellite tank comprises a first member 1 and a second member 2 connected by a shape memory alloy (SMA) member 3. The first and second members 1, 2 are connected together by the SMA 3 when it is in an austenitic state but the connection between the first and second...

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Bibliographische Detailangaben
Hauptverfasser:	CHRISTIAN SCHLOSSER, HEINZ VOGGENREITER, JOACHIM SCHUPP, AXEL RUNGE, ANDREAS SCHUSTER
Format:	Patent
Sprache:	eng
Schlagworte:	AIRCRAFT AVIATION BLASTING COSMONAUTICS DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS ORMACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS,CLIPS, WEDGES, JOINTS OR JOINTING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MECHANICAL ENGINEERING PERFORMING OPERATIONS THERMAL INSULATION IN GENERAL TRANSPORTING VEHICLES OR EQUIPMENT THEREFOR WEAPONS
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Beschreibung
Zusammenfassung:	Attachment device for a cryogenic satellite tank comprises a first member 1 and a second member 2 connected by a shape memory alloy (SMA) member 3. The first and second members 1, 2 are connected together by the SMA 3 when it is in an austenitic state but the connection between the first and second members 1, 2 is loosened when the SMA 3 expands in its martensitic state following cooling in space. This allows reduced surface pressure and reduced surface contact, resulting in reduced thermal flow between the first and second members. The SMA member 3 may be formed as a bolt and/or a ring 11 (and 19, figure 4) and made of a NiTiCuFe alloy.