Ratchet system for motorcycle helmet shield

Apparel – Guard or protector – For wearer's head

Patent

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Details

A42B 302

Patent

active

053333292

ABSTRACT:
A ratchet system for a motorcycle or bicycle helmet shield has a one-piece face shield with end tabs having a ring of upraised teeth and additional radially extending teeth along a curved edge. The ratchet system also has a pair of helmet-mounted side plates, each having a leaf spring with a central point that engages in grooves between the radially extending teeth of the end tabs. The end tabs are pivotally mounted on the side plates. The ratchet system also has shield covers having a set of surface teeth to engage with grooves between the upraised teeth of the end tabs. The ratchet system may also include bolts for attaching the system to the helmet, for holding the covers against the end tabs, and for adjusting the ratcheting tension. A bicycle or motorcycle helmet face shield for protecting a bicycle or motorcycle rider's face from the sun includes a transparent body, an ultraviolet ray-filtering coating on a surface of the body, and a reflective coating on the same surface of the body. A method for manufacturing a face shield having a reflective, ultraviolet ray-filtering surface includes molding the shield in a steel mold, washing the shield in detergent, forming an ultraviolet ray-filtering coating, washing the shield with freon, and bombarding a surface of the shield with heated tinting particles in a vacuum chamber.

REFERENCES:
patent: 3756692 (1973-09-01), Scott
patent: 3781914 (1974-01-01), Ramsay
patent: 4176410 (1979-12-01), Matthias
patent: 4748696 (1988-06-01), Fohl
patent: 5005221 (1991-04-01), Chen
patent: 5018223 (1991-05-01), Dawson et al.
patent: 5091997 (1992-03-01), Foehl
patent: 5095551 (1992-03-01), Chin
patent: 5165117 (1992-11-01), Kamata
patent: 5185889 (1993-02-01), Kamata
Enlargement of sticker that was placed on Shoei Face Shield Model Number C-10 as Sold With Shoei Helmet Model Number RF-200. Printing date unknown.
From Shoei's RF-200 Instructions For Use, pp. 9 and 10. This is the Instruction Manual for a Shoei Helmet That Uses the C-10 Ratchet Collar Face Shield, Printed in Approximately 1989.
Components of Shoei Face Shield Model C-10.
From Nolan's Instructions: Disassembly-Assembly of N25 Visor and Spare Parts, p. 4. Appears to have been printed in 1992.
Nolan Face Shield Model Number N39. View of an end portion of the shield.
AGV Face Shield Model Number KR2000. View of an end portion of the shield.
AGV Face Shield Models "Cobra," Alpha, and Sting. View of an end portion of the shield.

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