Patent ID: 8282390

Claim:
A gas cooking appliance comprising: a burner; a valve comprising: a valve inlet, a valve outlet, a rotatable regulator between the valve inlet and the valve outlet, wherein the valve is configured to provide a minimum flow rate of natural gas when the regulator is in a first angular position, a shaft coupled to the regulator to manipulate the angular position of the regulator to control the flow rate of gas at the valve outlet, a stop, apart from the valve, wherein the shaft rotates relative to the stop, and wherein the stop is positioned and configured to cooperate with a rotatable structure to prevent rotation of the regulator beyond the first angular position; and wherein the valve is configured to provide a minimum flow rate of liquefied petroleum gas when the regulator is in a second angular position, and the regulator is rotatable to the second angular position only in the absence of the rotatable structure.