One-way valve
US9861838B2 · kind B2 · utility
0Cited by
2References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 18, 2011 |
| Grant date | Jan 9, 2018 |
| Priority date | — |
| Expiry date | Jan 14, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB63C11/16
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A one-way valve for use in the inhalation and/or exhalation flowpath of respiratory protection equipment comprises a housing 1 defining a conduit and a circumferential array of three flexible flaps 2 each extending inwards from the conduit wall and in the direction away from the inlet end I of the valve. Under a pressure differential in the opening direction of the valve each flap is adapted to flex outwards towards the conduit wall and under a reverse pressure differential the free edge 5,5 of each flap is adapted to press in sealing contact with respective portions of the free edges of the neighboring flaps.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.