Inhalation valve
US4456016A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 1, 1982 |
| Grant date | Jun 26, 1984 |
| Priority date | — |
| Expiry date | Jul 1, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2546
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An inhalation valve is provided for testing the breathing capacity of a person. The valve is constructed of two plastic moldings which snap together and trap a flexible elastomeric valve diaphragm between them. The valve is provided with a mouthpipe. Exhalation through the mouthpipe deflects the diaphragm to permit substantially unrestricted exhalation. Inhalation is through a laterally displaced passageway having a transverse wall therein to produce a pressure drop. Tubular fittings are provided in the pressure drop area behind the wall and exteriorally of the flow path to provide an input to an electronic apparatus to indicate the efficiency of breathing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.