Inhalation valve
US4538620A · kind A · utility
12Cited by
3References
4Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 13, 1983 |
| Grant date | Sep 3, 1985 |
| Priority date | — |
| Expiry date | May 13, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2544
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An inhalation valve for respiratory diagnosis and/or therapy is provided. A single rubber or the like diaphragm is mounted in a free floating fashion so that one portion would open upon inhalation, while the other portion opens upon exhalation. The valve body is of molded plastic construction and contains a tube of restricted area through which air flows upon inhalation with reduction in lateral pressure being measured to indicate the volume of inhaled air.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.