Patent ID: 6212689
Filing Date: 2001-04-10
Classification: A42B

Abstract:
A compound protective helmet, comprising:a bubble with a pair of pads fixed on opposing sides of said bubble, each said pad comprises a protruding positioning guide post, said bubble further comprises a restriction trough provided at each of two ear protectors of said bubble,a visor pivotally attached to said bubble, said visor comprises a pair of arc key holes formed at locations corresponding to locations of said positioning guide posts of said pad, a positioning dent is recessed in an external side of each said arc key hole,a chin protector pivotally attached to said bubble, positioning nipples are provided on said chin protector at locations corresponding to those of said positioning dents of said visor, anda securing and release device fixed to said chin protector, said securing and release device comprises a fixing base with a longitudinal sliding base, a lateral sliding rail provided at both sides of said fixing base, a resilient leading block, and a pair of linkages, a first end of said linkages is pivotally attached at a top end of said leading block, and a second end of said linkages is pivotally attached to a respective one of a pair of securing levers, said securing levers being positioned in said sliding rail; whereinsaid visor is lifted with said positioning guide posts traveling in said arc key holes, said visor is held in a desired position by said positioning dents and said positioning nipples, said securing and release device allows a user to position said helmet in a full mask position when the user pulls said mask down so that said resilient leading block pushes said securing levers into said restriction trough of said ear protector of said bubble, and when said securing levers are disengaged from said restriction trough, said chin protector can be lifted by the user.