Shape memory alloy actuator

A shape memory alloy actuator includes a housing, a plunger, a shaft, a resilient member, and a shape memory alloy component. The plunger is slidably but non-rotatably received in the housing and has a first locking component. The shaft has a second locking component. The resilient member is positio...

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Bibliographische Detailangaben
Hauptverfasser:	RIDDIFORD BRYAN P, HAGEMAN JOHN B, HEWER THOMAS D
Format:	Patent
Sprache:	eng
Schlagworte:	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ELECTRIC EQUIPMENT OR PROPULSION OF ELECTRICALLY-PROPELLEDVEHICLES ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES, IN GENERAL ENGINE PLANTS IN GENERAL ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MACHINES OR ENGINES IN GENERAL MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENTTYPE, e.g. STEAM ENGINES MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES MECHANICAL ENGINEERING MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOTOTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISEPROVIDED FOR OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PERFORMING OPERATIONS PRODUCING MECHANICAL POWER SPRING, WEIGHT, INERTIA OR LIKE MOTORS STEAM ENGINES THERMAL INSULATION IN GENERAL TRANSPORTING VEHICLES IN GENERAL WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	A shape memory alloy actuator includes a housing, a plunger, a shaft, a resilient member, and a shape memory alloy component. The plunger is slidably but non-rotatably received in the housing and has a first locking component. The shaft has a second locking component. The resilient member is positioned to slidably urge the plunger into a disengagement position of the first and second locking components allowing rotation of the shaft. The shape memory alloy component is positioned to slidably urge the plunger into an engagement position of the first and second locking components, when the shape memory alloy component is heated, preventing rotation of the shaft. In one application, the first and second locking components are interdigitable vehicle-parking-brake latch teeth.