Inhalation valve
US4470412A · kind A · utility
213Cited by
3References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1982 |
| Grant date | Sep 11, 1984 |
| Priority date | — |
| Expiry date | Mar 19, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M15/0018
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An inhalation valve is presented for use with a known antiasthmatic medication cartridge and mouthpiece to simplify patient inhalation and to improve mist formation. A cylindrical passageway receives the known mouthpiece and is provided with an elastomeric diaphragm having a slit therein. An upstream spider backs up the diaphragm. Upon inhalation the diaphragm flexes and stretches to open the slit, and the diaphragm seals off exhaust passages. On exhalation the diaphragm backs against the spider which seals the slit, the diaphragm moving away from and opening the exhaust passages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.