Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1993-01-29
1995-11-28
Chilcot, Richard
Measuring and testing
Volume or rate of flow
Using differential pressure
73 3, G01F 2500, G01F 142
Patent
active
054697506
ABSTRACT:
A method of calibrating the output of a transducer in a flow path through which a medication is delivered from a hand-held metered dose inhaler is disclosed. The transducer senses flow rates of human breath during inhalation and exhalation through a portion of a flow path in the inhaler. The flow rates have two non-linear flow characteristics in opposite directions. The flow path portion provides flow rate measurements representative of flow paths of the entire system. The method makes it possible to precisely calibrate so that precise doses of medication can be repeatedly delivered to a patient by inhalation.
REFERENCES:
patent: 2255771 (1941-09-01), Golay
patent: 3435676 (1969-04-01), Brockner et al.
patent: 3735752 (1973-05-01), Rodder
patent: 4083245 (1978-04-01), Osborn
patent: 4848163 (1989-07-01), Vacirca
patent: 4884460 (1989-12-01), Nowacki et al.
patent: 4926678 (1990-05-01), Pegrman
patent: 4932269 (1990-06-01), Cammarata et al.
patent: 4965756 (1990-10-01), Pearman et al.
patent: 5076093 (1991-12-01), Jones, Jr. et al.
patent: 5201322 (1993-04-01), Henry et al.
Johansson Eric T.
Lloyd Peter M.
Ritson Carl
Rubsamen Reid M.
Aradigm Corporation
Bozicevic Karl
Chilcot Richard
Patel Harshad
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