초록 ▼

A valve actuator for opening and closing the shut-off valves on fire trucks. The actuator includes a push rod in communication with an actuator nut and a screw rod. A turn handle fastened to the screw rod allows for delayed opening and closing of the shut-off valves to prevent water shock. The valve

A valve actuator for opening and closing the shut-off valves on fire trucks. The actuator includes a push rod in communication with an actuator nut and a screw rod. A turn handle fastened to the screw rod allows for delayed opening and closing of the shut-off valves to prevent water shock. The valve actuator also includes magnetic sensors to provide a visual indication of the position of the valve to the operator.

대표청구항 ▼

In combination, a valve, and actuator means for opening and closing said valve, said valve including a valve housing having a passageway for allowing fluid to flow through the valve housing, shiftable stop means carried by said valve housing for selectively allowing or preventing fluid flow through

In combination, a valve, and actuator means for opening and closing said valve, said valve including a valve housing having a passageway for allowing fluid to flow through the valve housing, shiftable stop means carried by said valve housing for selectively allowing or preventing fluid flow through said passageway, said actuator means comprising a tubular housing, a push rod shiftably positioned in said tubular housing, means for shifting said push rod between a retracted position and an extended position, said push rod having a proximal end adjacent said means for shifting and a distal end adjacent said stop means, said means for shifting including a threaded rod rotatably positioned in said tubular housing, a follower nut connected to said threaded rod and said push rod, means for rotating said threaded rod wherein said follower nut reciprocates within said tubular housing in response to rotation of said threaded rod to shift the push rod between said extended and retracted positions, and a control rod pivotally connected to said push rod distal end, said control rod operatively coupled to said stop means wherein said stop means is shifted between open and closed positions in response to shifting of the push rod.