Helmet suspension having ratchet adjustment

Details Helmet suspension having ratchet adjustment Helmet suspension having ratchet adjustment

1989-09-20

1990-07-24

Schroeder, Werner H.

Apparel

Guard or protector

For wearer's head

2410, 2417, 2418, 2420, 74108, 74109, A42B 304, A42B 314

Patent

active

049426281

ABSTRACT:
A head protection or helmet suspension is shown having a ratchet adjustment apparatus for the adjustment of the suspension size where the ratchet apparatus is comprised of three parts, all pre-molded of resilient plastic material and having a pre-molded spring fixed around the center of the adjustment knob to engage pins in the ratchet case to lock the suspension size in position. The assembly has no metal parts and is therefore suitable for use around electricity and electrical apparatus.

REFERENCES:
patent: 631880 (1899-08-01), Ross
patent: 1288966 (1918-12-01), Nielsen
patent: 3040717 (1962-06-01), Rumsey
patent: 3329968 (1967-07-01), Gordon
patent: 3992720 (1976-11-01), Nicozinas
patent: 4279037 (1981-07-01), Morgan
patent: 4553270 (1985-11-01), Hoffman
patent: 4793001 (1988-12-01), Accardi
MSA Sales Bulletin 6-01-12 dated Nov. 1988.
MSA Sales Bulletin Data Sheet 06-00-12, dated 1988.

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