US Patent 7361013 Numeral lighter

A numeral lighter includes an inner lighter housing having a liquefied gas storage and a top supporting frame and a numeral outer casing having a receiving cavity and a top opening communicating with the receiving cavity, wherein the inner lighter housing is detachably received in the receiving cavity of the numeral outer casing at a position that the liquefied gas storage is protectively enclosed within the numeral outer casing while the top supporting frame is positioned at the top opening of the numeral outer casing such that the numeral outer casing forms as an interchangeable shell to accommodate the inner lighter housing therein so as to enhance an aesthetic appearance of the lighter.