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

Claim 0:
1. A method for manufacturing an operational element for using alone or as a part of an apparatus, which operational element comprises as a source piece a magnetic shape memory alloy with a twin variant structure having a boundary between the variants, characterized in that
a) prior to manufacturing the operational element from the source piece, and prior to creating active and inactive regions into the source piece, such a predetermined twin variant structure is created to the source piece of the magnetic shape memory (MSM) alloy that the active region to be created or a part of it produces magnetic-field-induced shape change required for performing its function in the operational element,
b) at least a part of the source piece, from which the operational element is manufactured, is arranged as 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, and
c) at least one other part of the same source piece is arranged as an inactive region by treating the part in such a way that the twin boundaries between the twin variants do not move when a magnetic field is applied to those inactive regions in the operational element.