Size adjustable helmet

Details Size adjustable helmet Size adjustable helmet

1983-04-22

1985-09-10

Nerbun, Peter

Apparel

Guard or protector

For wearer's head

2425, A42B 300

Patent

active

045397155

ABSTRACT:
A helmet having a front shell and a rear shell movable with respect to each other. Portions of the two shells overlap each other and present mating surfaces which can engage to retain the shells in a given overlapping position and can disengage to allow the shells to change their relative position. A device is provided for selectively (a) holding the mating surfaces in engagement, or (b) releasing them to disengage.

REFERENCES:
patent: 238247 (1881-03-01), Parsons
patent: 3204251 (1965-09-01), Child
patent: 3805294 (1974-04-01), Rose et al.
patent: 3897597 (1975-08-01), Kasper
patent: 4404690 (1983-09-01), Farquharson
patent: 4476589 (1984-10-01), Burgin et al.
patent: 4477929 (1984-10-01), Mattsson

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