Patent ID: 7866737

Claim:
A louver system comprising: an actuator mechanism including at least one selectively actuatable wire formed from an active material operable to change shape when actuated; a louver operatively selectively pivotable between an open position and a closed position, said louver being operatively connected to said actuator mechanism; wherein said actuator mechanism is operable to selectively pivot said louver when said at least one selectively actuatable wire is actuated; a shut-off mechanism operatively connected to said actuator mechanism and operable to cause said actuator mechanism to selectively pivot said louver into said open position in the event of failure of said actuator mechanism; and wherein said shut off mechanism includes at least one other selectively actuatable wire formed from shape memory alloy, having a first end anchored and a second end mounted to said actuator mechanism, and wherein said at least one other selectively actuatable wire actuates said actuator mechanism when said at least one other selectively actuatable wire is actuated.