Electromechanical lock employing shape memory metal wire

Details Electromechanical lock employing shape memory metal wire Electromechanical lock employing shape memory metal wire

2005-05-11

2008-08-05

Engle, Patricia (Department: 3673)

Locks

Operating mechanism

Using a powered device

C070S278100

Reexamination Certificate

active

07406846

ABSTRACT:
An electronic lock incorporating one or more shape memory metal wire segment as its electromechanical transducer. An electronic control circuit injects electrical current into the shape memory metal wire, causing it to heat up and contract. A gate is positioned by the action of the shape memory metal wire(s) to either allow or block the movement of a locking bolt that affect locking or unlocking. Millions of operational cycles are achieved by limiting the stretching of the shape memory metal wire at low temperature to small percentages of its total length. The design lends itself to miniaturization, with commensurate reduction in power consumption, that is useful to the evolution of future electronic locks.

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patent: 6310411 (2001-10-01), Viallet
patent: 6374653 (2002-04-01), Gokcebay et al.
patent: 2004/0035687 (2004-02-01), von Behrens et al.

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