Safety helmet

Details Safety helmet Safety helmet

1973-03-19

1976-03-30

Schroeder, Werner H.

Apparel

Guard or protector

Body cover

A42b 302

Patent

active

039464415

ABSTRACT:
A safety helmet for vehicular use constructed of two superimposed shells to take advantage of the physical properties of each of the materials for the shells and cancel out any disadvantages. The shells preferably are constructed of different plastic materials such as a fiberglass reinforced plastic and a tough plastic such as a polycarbonate.

REFERENCES:
patent: 2619639 (1952-12-01), Hendler
patent: 3023134 (1962-02-01), Cresswell et al.
patent: 3116490 (1964-01-01), Zbikowski
patent: 3242500 (1966-03-01), Derr
patent: 3245087 (1966-04-01), Marchello
patent: 3320619 (1967-05-01), Lastnik et al.
patent: 3418657 (1968-12-01), Lastnik et al.
patent: 3437631 (1969-04-01), Cleveland
patent: 3500475 (1970-03-01), Otsuka

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