Helmet and visor mechanism therefor
US4907300A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 3, 1987 |
| Grant date | Mar 13, 1990 |
| Priority date | — |
| Expiry date | Dec 3, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA42B3/228
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A helmet with twin visors movable between raised and lowered positions has a locking mechanism for each visor which automatically locks the visor in the raised or lowered position. An operating lever for each visor can be operated with one hand by the wearer, a single movement of the lever first releasing the lockikng mechanism and then moving the visor from one to the other of its raised and lowered positions. Each locking mechanism may comprise a cam plate fixed to the helmet shell and two pawls carried by the visor arm and spring-biased to engage the cam to lock the visor in the raised or lowered position respectively. The operating lever engages the appropriate pawl to disengage it from the cam plate and rotate the visor arm, on movement of the lever in the appropriate direction. The lower position of each visor may be adjustable, for example to accommodate an oxygen mask fitted to the helmet. The mechanism may also be used on a helmet fitted with a single visor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.