Valve Assembly With Overstroke Device and Associated Method
First Claim
1. A valve assembly, comprisinga rotatable valve,an electrically operated actuator comprising a component configured to move in a direction to an actuator position so as to cause corresponding rotation of the valve to a valve position in response to electrical operation of the actuator,a torsion spring to bias the valve away from the valve position, andan overstroke device configured to enable the component to move in the direction beyond the actuator position to an overstroke position while the valve remains in the valve position in response to electrical operation of the actuator.
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Abstract
A valve assembly comprises a rotatable valve, an electrically operated actuator, and an overstroke device. The actuator comprises a component configured to move in a direction to an actuator position so as to cause corresponding rotation of the valve to a valve position in response to electrical operation of the actuator. The overstroke device is configured to enable the component to move in the direction beyond the actuator position to an overstroke position while the valve remains in the valve position in response to electrical operation of the actuator.
44 Citations
14 Claims
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1. A valve assembly, comprising
a rotatable valve, an electrically operated actuator comprising a component configured to move in a direction to an actuator position so as to cause corresponding rotation of the valve to a valve position in response to electrical operation of the actuator, a torsion spring to bias the valve away from the valve position, and an overstroke device configured to enable the component to move in the direction beyond the actuator position to an overstroke position while the valve remains in the valve position in response to electrical operation of the actuator.
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11. A valve assembly, comprising
a rotatable valve, a valve stop, a solenoid device, a rotatable pulley secured to the solenoid device, a first torsion spring interconnecting the pulley and the valve to allow rotation of the pulley relative to the valve during contact between the valve and the valve stop and energization of the solenoid device, and a second torsion spring to act through the pulley and the first torsion spring to bias the valve away from the valve stop.
Specification