POWER ACTUATED VALVE
First Claim
1. A power actuated valve comprising a transducer and a housing which forms an inlet for entering fluid into the valve, an exit for exit of the fluid from the valve, and a path between the inlet and the exit, the transducer comprising a laminate with a film of a dielectric polymer material arranged between first and second layers of an electrically conductive material so that it is elastically deformable in response to an electrical field applied between the layers, wherein the transducer is arranged relative to the path to provide a ratio between deformation of the film and a flow condition in the path.
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Accused Products
Abstract
The invention provides a power actuated valve comprising a transducer and a housing which forms an inlet for entering fluid into the valve, an exit for exit of the fluid from the valve, and a path between the inlet and the exit, the transducer comprising a laminate with a film of a dielectric polymer material arranged between first and second layers of an electrically conductive material. The film is elastically deformable in response to an electrical field applied between the layers, and the transducer is arranged relative to the path so that a ratio between deformation of the film and a flow condition in the path is established.
97 Citations
46 Claims
- 1. A power actuated valve comprising a transducer and a housing which forms an inlet for entering fluid into the valve, an exit for exit of the fluid from the valve, and a path between the inlet and the exit, the transducer comprising a laminate with a film of a dielectric polymer material arranged between first and second layers of an electrically conductive material so that it is elastically deformable in response to an electrical field applied between the layers, wherein the transducer is arranged relative to the path to provide a ratio between deformation of the film and a flow condition in the path.
Specification