US Patent 7287551 Gas control valve

The present invention provides gas control valve including a valve body having a gas inlet, a gas outlet, and a gas passage between the inlet and outlet, and including a valve control element for controlling the flow of gas between the inlet and the outlet. The valve control element includes valve stem have a cam follower in the form of a pin projecting laterally there-from, and a bead 8 at one end of the stem bearing an O-ring that is able to seal against an inside wall surface of the body to seal the gas outlet. The cam follower pin on the stem engages with a cam surface of the valve body. Rotation of the valve control element causes the cam follower pin to co-operate with the cam surface and displace the valve control element to open or close the valve. The present invention also provides a gas appliance having one or more gas burners and a gas control including at least one control value according to the invention.