Patent ID: 7216831

Claim:
A structure comprising: a body including a first wall and a second wall; at least one appending component extending from an end of the body, the appending component including a first skin and second skin; and at least one actuator positioned within a cavity formed in the first wall and the second skin, the actuator comprising: at least one shape memory alloy (SMA) wire adapted to constrict when activated to move the first skin of the appending component from a first position to a second position, a fixed pulling bracket connected to a first end of the at least one SMA wire and coupled to an interior side of the first wall, between the first and second walls and within the cavity, a freely movable pulling bracket connected to a second end of the at least one SMA wire and located between the first and second walls and within the cavity absent direct connection to the body and the appending component such that the freely movable pulling bracket is freely movable within the cavity.