Importance

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Abstract

A valve operating device defined by the following features: a slider supported in axially displaceable manner in a housing and linked by an actuation segment to the valve, a first biasing spring configured in the housing and pre-stressing the slider against a first stop, an expansible element configured in the housing and being displaceably supported in approximately coaxial manner relative to the slider between a second and a third stop, a second biasing spring acting on the expansible element and pre-stressing the element against the second stop, the configuration allowing cooperation between the expansible element's drive pin and the slider, a heater associated to the expansible element, a heat dissipating element associated with the expansible element and cooling the expansible element when latter rests against the third stop, the force exerted by the first biasing spring being larger than that of the second biasing spring.

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First Claim