Snorkel with exhalation valve
US5937850A · kind A · utility
13Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 1998 |
| Grant date | Aug 17, 1999 |
| Priority date | — |
| Expiry date | Jan 26, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C11/205
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A bottom of a mouthpiece 2 of a snorkel comprises a first base plate 16 having through-holes 22 for drainage and against which a non-return valve 7 bears from the outside, second base plates 17 spaced from the first base plate 16 toward a top of the snorkel so as to cover the through-holes and supports 18 extending between the first plate 16 and each of the second base plates 17. The interior of the mouthpiece 2 drainably communicates with the exterior thereof through openings defined between the first base plate 16 and each of the second base plates 17 and the through-holes 22, when the non-return valve 7 is opened.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.