Casing and spirometer for metered dose inhaler
US5724986A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 6, 1995 |
| Grant date | Mar 10, 1998 |
| Priority date | — |
| Expiry date | Nov 6, 2015 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2016/0036
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An apparatus for dispensing a metered amount of aerosolized medication and/or for measuring breathing function includes a casing that defines a cavity, a first or discharge opening from which a subject inhales from the cavity or exhales into the cavity, a second or air opening through which air enters the cavity, and a third opening in fluid communication with the cavity between the first and second openings. The casing also defines an open pocket for receiving a pressurized canister and a fourth or medication opening through which the contents of the canister discharge into the cavity of the casing. A pressure transducer in fluid communication with the third opening senses the pressure of breath moving through the cavity. Alternatively, a fan and photocell assembly may replace the pressure transducer and sense the flow of gas through the cavity.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.