Fluid control valves
OwnerJohn Ellacott, John Hill +1inventors
InventorsJohn Ellacott, John Hill, Sidney Western
Life of this patent
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Abstract
An automatic fluid control valve assembly comprising a rotary valve which is changed from fully open to fully closed by rotation of an actuating shaft through approximately a right angle, a spring for rotating the shaft from a position where the valve is open to a position where the holds the valve is closed or vice versa, a trigger mechanism which holds the valve open or closed against the action of the spring, and a solenoid for actuating the trigger mechanism when the valve is to be opened or closed.
Claims13
An automatic fluid control valve assembly comprising a rotary valve which is changed from fully open to fully closed by rotation of an actuating shaft through approximately a right angle, a spring for rotating the shaft from a position where the valve is open to a position where the valve is closed or vice versa, a trigger mechanism which holds the valve open or closed against the action of the spring, and a solenoid for actuating the trigger mechanism when the valve is to be opened or closed.
An assembly according to either of the preceding claims, wherein the spring for rotating the shaft of the valve is a coil spring disposed around the shaft.
An assembly according to any of the preceding claims, wherein the trigger mechanism comprises a cam defining a cam surface attached to the shaft of the valve, and a pivotal lever having an end portion for engaging the cam surface to prevent rotation of the cam until the pivotal lever is rotated by the solenoid to disengage the said end portion of the pivotal lever from the said cam surface.
An assembly according to any of the preceding claims, wherein the trigger mechanism comprises a cam defining a cam surface attached to the shaft of the valve, and a pivotal lever having an end portion for engaging the cam surface to prevent rotation of the cam until the pivotal lever is rotated by the solenoid to disengage the said end portion of the pivotal lever from the said cam surface, the solenoid having an armature with a non-ferromagnetic extension having a slot therein, an end portion of the pivotal lever being located in the slot in the extension of the armature.
An assembly according to any of the preceding claims, including at least one stop for limiting rotation of the valve under the action of the spring for its rotation.
An automatic fluid control valve assembly substantially as herein described with reference to the accompanying drawings.
An automatic fluid control device comprising an automatic fluid control valve assembly according to any of the preceding claims and a fluid flow sensor arranged to actuate the solenoid under predetermined conditions of fluid flow.
Dependencies are inferred from the claim text.