Head guard assembly comprising a protective helmet and a protective breathing mask

摘要

A head guard assembly comprises a protective head helmet, with a face protective breathing mask coupled to the helmet by interengagement of a coupling pin carried on each side of the face mask with a socket member carried on each side of the protective helmet. The socket member includes a bore which is tapered outwardly in a funnel-shape and is of oval configuration so as to conform close to the inside of the helmet side flaps. It has an interior widened portion in the bore forming catch grooves which are engaged by ball members which are carried in the recess of the coupling member and are biased by a spring into outward engagement with the catch groove when the coupling pin is inserted. The coupling pin includes an uncoupling member which moves against the balls to cause them to be pressed into the recess of the member to permit withdrawal of the mask from the helmet. The socket member is mounted on the helmet by means of a slide which may be slid in directions toward and away from the coupling pin and locked in an adjusted position in order to regulate the interfitting of the mask with the helmet.