公开(公告)号：US11333133B2

公开(公告)日：2022-05-17

申请号：US17426664

申请日：2020-03-27

Applicant: SAES GETTERS S.P.A.

Inventor： Marco Citro ,  Luca Fumagalli ,  Matteo Zanella ,  Michele Scarlata

IPC: F03G7/06

Abstract: The present invention relates to linear actuators comprising an electrically-controlled shape memory alloy coil spring (23) suitable to provide linear displacements in valves, switches, lock systems and provided with a crimped terminal at each extremity, each of said crimped terminals comprising a crimping component (21) and an engaging member (22) suitable to mount the spring (23) into the linear actuator. The invention further discloses the use of said spring (23) with particular geometrical characteristics and crimping system assuring the maximization of the available stroke and fatigue life, structural simplicity, low electrical power requirements and thermal inertia, small size.