visor of protection of the face, a device incorporating anti-fog visor

摘要

P the invention relates to a means of protection of the face provided with a visor. / p & & p & according to the invention, the protection means comprises two chambers 14, 15: a first chamber 14 in communication with the atmosphere, comprising the said visor 12 and containing the eyes of the user and a second chamber 15, containing at least the nose of the user, which is also in communication with the atmosphere and, in addition, with the first chamber 14 via at least a unidirectional inspiration valve 18. / p