Actuator, valve actuator unit and valve

An actuator (22) comprises at least one actuator body (32) of dielectric elastomeric material and two electrodes (34, 36) being attached to opposite surfaces of the actuator body (32), respectively. At least one of the actuator body (32) and at least one of the electrodes (34, 36) is at least partly...

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Bibliographische Detailangaben
Hauptverfasser:	Shea, Herbert Rudolf, Albuquerque, Fabio Beco
Format:	Patent
Sprache:	eng
Schlagworte:	ACTUATING-FLOATS BLASTING COCKS CONVERSION OR DISTRIBUTION OF ELECTRIC POWER DEVICES FOR VENTING OR AERATING ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR ELECTRICITY ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS GENERATION HEATING LIGHTING MECHANICAL ENGINEERING TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS
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Beschreibung
Zusammenfassung:	An actuator (22) comprises at least one actuator body (32) of dielectric elastomeric material and two electrodes (34, 36) being attached to opposite surfaces of the actuator body (32), respectively. At least one of the actuator body (32) and at least one of the electrodes (34, 36) is at least partly covered at its outer side with a protective layer (38a, 38b) of polymer material, wherein a mechanical stiffness of the protective layer (38a, 38b) is at least three times lower than a mechanical stiffness of the actuator body (32). Moreover, a valve actuator unit comprises such an actuator (22) and a housing, wherein the actuator (22) is arranged within the housing and the remainder of the housing is filled with a gas. Additionally, a valve comprises such a valve actuator unit and a valve element, wherein the valve element is movable by the valve actuator unit.