Patent ID: 11957060
Assignee: TIKOMAT OY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  H  B  C | IPC B  C  F  H

Claim 16:
17. An operational element for using alone or as a part of an apparatus, which operational element comprises a magnetic shape memory alloy with a twin variant structure having a boundary between the variants, characterized in that
a) at least a part of the operational element is an active region that is responsive to a magnetic field for carrying out functions in the operational element which functions require producing of shape changes,
b) at least one other part of the operational element is an inactive region that is unresponsive to a magnetic field for carrying out other functions in the operational element, and
c) the operational element has a predetermined twin variant structure where the mobility of twin boundaries between the variants has been arranged so that in the active regions the twin boundaries move for producing a desired shape change of the active region and in the inactive regions the twin boundaries do not move when a magnetic field is applied to those regions in the operational element.