Patent ID: 6777840
Filing Date: 2004-08-17
Classification: F16K,Y10T

Abstract:
An improved actuator for water heating/cooling and sanitary systems, including a driving motor and a related reducing unit operating on a spring preloaded shutter driving a component such as a valve, manifold or the like, characterized in that said actuator comprises, in a support framework,a) an electric motor comprising a miniaturized D.C. motor, b) a first reducing unit comprising a planetary reducing unit providing a high reduction ration, c) a second reducing unit arranged between the first reducing unit and an element operatively associated to the shutter, said second reducing unit including a worm screw for transforming a rotary movement into an axially reciprocating movement, d) a mechanical clutch element, operatively arranged between an output of said D.C. motor and an inlet of said first planetary reducing unit, e) an electronic control card for controlling and driving said D.C. motor depending on a presettable heating/cooling program, and f) mechanic coupling means for coupling to said valve, manifold or the like, including the shutter to be driven, and characterized in that said second reducing unit comprises a driving gear wheel and a second gear wheel or pinion having an inside threaded sleeve and housing with a threading engagement a worm screw element to transform a rotary movement into an axial reciprocating movement, wherein said worm screw element has an end operatively cooperating with a rod, or the like, of the shutter driving element.