초록 ▼

A feedback, motor-operated valve, including a valve casing having an inlet, an outlet and a valve seat operably positioned therebetween, and further including a valve element movably mounted in the casing to control flow between the inlet and the outlet, the valve element adapted for screw-like move

A feedback, motor-operated valve, including a valve casing having an inlet, an outlet and a valve seat operably positioned therebetween, and further including a valve element movably mounted in the casing to control flow between the inlet and the outlet, the valve element adapted for screw-like movement into and out of sealing engagement with the valve seat by a valve stem rotatably mounted in the valve casing and extending through the casing exterior thereof, a reversible motor for actuating the valve including a reversible drive motor having an output shaft and drive gear which can be driven together in both a clockwise and counterclockwise direction for turning the valve element, a driven shaft interposed the motor drive shaft and the valve stem and connected to the valve stem, including a driven gear for engagement with the drive gear to effect turning of the valve element from turning the motor drive shaft, an electro-mechanical feedback operably connected to the driven shaft for providing an electric signal output in response to the position of the valve element with respect to the valve seat, and a device to provide a controlled amount of overturning of the motor drive shaft following full closure of the valve element against the valve seat and simultaneously storing a portion of the drive energy expended in the overturning, to bias the valve in its closed position, and to discharge the stored energy to aid in opening the valve upon reverse turning of the drive motor and motor drive shaft.

대표청구항 ▼

A feedback, motor-operated valve, comprising: a) valve means including a casing having an inlet, an outlet and a valve seat operably positioned therebetween, and further including a valve element movably mounted in said casing to control flow between said inlet and said outlet, said valve element ad

A feedback, motor-operated valve, comprising: a) valve means including a casing having an inlet, an outlet and a valve seat operably positioned therebetween, and further including a valve element movably mounted in said casing to control flow between said inlet and said outlet, said valve element adapted for screw-like movement into and out of sealing engagement with said valve seat by a valve stem rotatably mounted in said valve casing and extending through said casing exterior thereof; b) reversible motor-driven actuating means for said valve means including a reversible drive motor having an output shaft and drive gear which can be driven together in both a clockwise and counterclockwise direction for turning said valve element; c) a driven shaft interposed said motor drive shaft and said valve stem and connected to said valve stem, including a driven gear for engagement with said drive gear to effect turning of said valve element from turning said motor drive shaft; d) electro-mechanical feedback means operably connected to said driven shaft for providing an electric signal output in response to the position of said valve element with respect to said valve seat; and, e) means freely rotatable with said driven shaft for providing a controlled amount of overturning of said motor drive shaft following full closure of said valve element against said valve seat and simultaneously storing a portion of the drive energy expended in said overturning, to bias said valve in its closed position, and to discharge said stored energy to aid in opening said valve upon reverse turning of said drive motor and motor drive shaft.