Diving face mask
US5329643A · kind A · utility
30Cited by
5References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 8, 1993 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | Jun 8, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C11/12
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A diving face mask comprises a purge valve assembly in a lower central area of a body frame. The purge valve assembly comprises a nose frame projecting from the body frame such that a V-shape cross-section is formed, a laterally elongated, and generally oblong valve which is configured to sit on a valve seat on a front wall of the nose frame for closing a laterally elongated, oblong opening passage. The purge valve assembly further comprises a nose cover having a configuration conforming to that of the nose frame for covering the nose frame, and a discharge opening defined between the nose frame and the nose cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.