Safety visor
US6832393B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 8, 2001 |
| Grant date | Dec 21, 2004 |
| Priority date | — |
| Expiry date | Mar 14, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61F9/045
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A safety visor is produced by etching of metal and a grid that defines a large number of light-permeating holes. The safety visor has at least two zones where the holes are of different areas and/or configuration. An upper central zone has greater light transmission than the remaining zones of the safety visor. The C—C spacing for the hole is constant in both the vertical and lateral directions regardless of in which region of the safety visor the holes are located. In one preferred embodiment, the holes are hexagonal with two approximately parallel sides that are longer than the remaining sides and are directed in the vertical direction of the safety visor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.