A fuel flow adjusting device for use in gas-fueled lighters includes a coarse fuel flow adjuster arranged rotatably within an outer cylindrical body in threaded engagement therewith, and a fine fuel flow adjuster arranged rotatably within said coarse fuel flow adjuster in threaded engagement therewith,...http://www.google.es/patents/US4157891?utm_source=gb-gplus-sharePatente US4157891 - Fuel flow adjusting device for use in gas-fueled lighters
Fuel flow adjusting device for use in gas-fueled lighters
