Gas control valve

An automatic gas valve, wherein the valve includes a valve body having a gas inlet, a gas outlet, a gas passage between the inlet and outlet, and includes a valve control element for controlling the flow of gas between the inlet and outlet, wherein the valve control element includes a cam follower that engages with a cam surface of the valve body, rotation of the valve control element causing the cam follower to co-operate with the cam surface to position the valve control element to open or close the valve, and wherein the valve control element is controlled by an automatic actuator.

An electronic gas valve including a valve body having a gas inlet, a gas outlet, a gas passage between the inlet and outlet, and including a valve control element for controlling the flow of gas between the inlet and outlet, wherein the valve control element includes a cam follower that engages with a cam surface of the valve body, rotation of the valve control element causing the cam follower to co-operate with the cam surface to position the valve control element to open or close the valve, and wherein the valve control element is controlled by an electric motor.

A gas valve including a cam follower and a cam surface over which the cam follower may be moved in use, movement of the cam follower over the cam surface causing the gas valve to open or close.

A gas valve including a camming surface on a body of the valve and a follower on a valve element mounted within the body, rotation of the valve element causing movement of the follower over the camming surface and movement of the valve element in a direction perpendicular to the direction of rotation.

A gas control valve including a valve body and key, wherein the key includes an O-ring thereon for sealing against the valve body, and wherein the key is moved by a camming mechanism to engage or disengage the O-ring with the valve body.

A gas control valve in which an O-ring seal is opened or dosed by a camming action, and in which a bypass passage is provided in a valve key on which the O-ring is mounted.

A gas appliance including a gas control valve, wherein the valve includes a valve body having a gas inlet, a gas outlet, a gas passage between the inlet and outlet, and includes a valve control element for controlling the flow of gas between the inlet and outlet, wherein the valve control element includes a cam follower that engages with a cam surface of the valve body, and wherein rotation of the valve control element causes the cam follower to co-operate with the cam surface to position the valve control element to open or close the valve.

An automatic gas appliance including a gas control valve, wherein the valve includes a valve body having a gas inlet, a gas outlet, a gas passage between the inlet and outlet, and includes a valve control element for controlling the flow of gas between the inlet and outlet, wherein the valve control element includes a cam follower that engages with a cam surface of the valve body, rotation of the valve control element causing the cam follower to co-operate with the cam surface to position the valve control element to open or close the valve, and wherein the valve control element is controlled by an automatically controlled actuator.

An electronic gas appliance including a gas control valve, wherein the valve includes a valve body having a gas inlet, a gas outlet, a gas passage between the inlet and outlet, and includes a valve control element for controlling the flow of gas between the inlet and outlet, wherein the valve control element includes a cam follower that engages with a cam surface of the valve body, rotation of the valve control element causing the cam follower to co-operate with the cam surface to position the valve control element to open or close the valve, and wherein the valve control element is controlled by an electrical actuator.