Fog-resistant sunglasses incorporating ventilation channels
US6050684A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 28, 1999 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Jan 28, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02C11/08
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Protective eyeglasses resistant to fogging while being worn by a wearer. The eyeglasses comprise a frame front which spans across the wearer's face and includes a forward side, an aft side, at least one middle portion extending over the wearer's eyes, and a pair of end piece portions near the wearer's temples. Attached to the middle portion of the frame front is at least one lens which is positioned over the wearer's eyes and defines front and back surfaces. Additionally, disposed within the frame front is at least one forwardly directed aperture which defines a ventilation channel for facilitating airflow through the frame front adjacent the lens. The ventilation channel defined by the aperture is sized and configured to facilitate the circulation of air over the back surface of the lens to resist the fogging thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.