US 12,292,038 B2
SMA actuator assembly
Andrew Benjamin Simpson Brown, Cambridge (GB); and Peter Van Wyk, Cambridge (GB)
Assigned to CAMBRIDGE MECHATRONICS LIMITED, Cambridge (GB)
Filed by CAMBRIDGE MECHATRONICS LIMITED, Cambridge (GB)
Filed on Oct. 13, 2023, as Appl. No. 18/379,751.
Application 18/379,751 is a continuation of application No. 17/885,077, filed on Aug. 10, 2022, granted, now 11,821,410.
Application 17/885,077 is a continuation of application No. 17/295,371, granted, now 11,448,199, issued on Sep. 20, 2022, previously published as PCT/GB2019/053567, filed on Dec. 16, 2019.
Claims priority of application No. 1820383 (GB), filed on Dec. 14, 2018.
Prior Publication US 2024/0035455 A1, Feb. 1, 2024
Int. Cl. F03G 7/06 (2006.01)
CPC F03G 7/06143 (2021.08) 14 Claims
OG exemplary drawing
 
1. A shape memory alloy actuator assembly comprising:
a first part, including a surface;
a second part arranged to move relative to the first part across the surface;
a biasing arrangement arranged to bias the second part into contact with the surface so as to generate frictional forces therebetween for retaining the second part in position on the surface; and
at least one shape memory alloy actuator wire connected at a first end to the first part and at a second end to the second part and arranged to, on contraction thereof, apply a force to the second part with a component parallel to the surface so as to drive movement of the second part relative to the first part across the surface.