PROTECTIVE HELMETS

摘要

In another aspect the present invention consists in a protective helmet assembly having a protective shell (1) with a head cradle system as wearable head support therefor (2,7), the assembly being characterised in that said protective shell (1) as a Level 1 shell is enhanced by at least one additional shell (8,9) carried directly or indirectly thereby, and being further characterised in thateach shell has at least one formation interchangeable with a complementary at least one formation of the other, the interengagement being a friction and/or interference fit formation to formation as one shell is next on the other thereby to hold the nested condition until the top most shell is uplifted from the low shell. Preferably there is such an interengagement over or near or over each ear of a user.