Inhalation valve
US5829433A · kind A · utility
15Cited by
7References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1996 |
| Grant date | Nov 3, 1998 |
| Priority date | — |
| Expiry date | Jul 1, 2016 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M16/06
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
Film made of floppy and deformable synthetic resin is used as a valve body of an inhalation valve and attached to the surface of a valve seat which is formed to a concave groove like shape having an arbitarily sectional view. The said valve body can not be applied to a conventional valve seat which has a flat surface. The inhalation valve is embedded to the breathing-in space of mask in which a filter pad is put in and prevent the valve body which separates from the seat at inhalation timing from entering into face contact part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.