Portable electronic spirometer
US7063669B2 · kind B2 · utility
50Cited by
19References
14Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2002 |
| Grant date | Jun 20, 2006 |
| Priority date | — |
| Expiry date | Jul 15, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B2560/0242
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A spirometer having a housing with an elongated flow chamber open at one end, a pressure sensing end opposite the open end and an outlet passageway intercepting the flow chamber at an angle α and proximate the pressure sensing end. A differential pressure sensor is coupled to the pressure sensing end from a port at an angle β to an axis of the flow chamber. The angle α is substantially greater than 0° but substantially less than 180° while the angle β may range from 90° to 180°, such that a significantly increased measured air pressure results over that measured when α=180° and β=90°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.