HYDRAULIC SHAPE MEMORY MATERIAL FORCE CONVERTER

A hydraulic shape memory alloy actuator is provided comprising a uniaxial shape memory alloy wire constructed of Nitinol. The actuator utilizes a pair of hydraulic cylinders in fluid communication with each other, each cylinder containing a hydraulic piston. The first hydraulic piston is moved from...

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Bibliographische Detailangaben
Hauptverfasser:	GROOM, KENNETH, N, WHITEHEAD, CHARLES, A
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BLASTING BRAKES CLUTCHES COUPLINGS FOR TRANSMITTING ROTATION ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS 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 PRODUCING MECHANICAL POWER SPRING, WEIGHT, INERTIA OR LIKE MOTORS THERMAL INSULATION IN GENERAL WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS
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Beschreibung
Zusammenfassung:	A hydraulic shape memory alloy actuator is provided comprising a uniaxial shape memory alloy wire constructed of Nitinol. The actuator utilizes a pair of hydraulic cylinders in fluid communication with each other, each cylinder containing a hydraulic piston. The first hydraulic piston is moved from a first position to a second position when the wire, connected at one end to the piston and its other to a fixed point, changes from a martensitic to an austenitic state upon heating. The second hydraulic piston responds to the movement of the first hydraulic piston by moving from a rest position to an operating position. Upon cooling the wire to change it from the austenitic state back to the martensitic state, the first piston returns to its original position, with a biasing means being provided to return the second piston to its rest position.