Disclosed herein is a welding helmet having a cartridge coupling structure. The welding helmet comprises a helmet body configured to cover and protect the welder's head, an opening being formed at a front surface of the helmet body, a protective cover provided along a periphery thereof with a packing...http://www.google.es/patents/US7284281?utm_source=gb-gplus-sharePatente US7284281 - Welding helmet having cartridge coupling structure
Welding helmet having cartridge coupling structure
