Expiratory flow measuring device
US5413112A · kind A · utility
16Cited by
4References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 15, 1993 |
| Grant date | May 9, 1995 |
| Priority date | — |
| Expiry date | Jan 15, 2013 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/0871
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A device for measuring the maximum flow rate of a single forced expiration, comprises an elongated hollow body with inlet and outlet ends, a vane mounted to a shaft and rotatable within the body from a defined rest position, and an indicator to indicate maximum displacement of the vane from its rest position. The vane is shaped such that airflow from the inlet end past the vane causes the vane to rotate away from the rest position with the plane of rotation preferably being at about 90.degree. to the airflow through the elongated body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.