Measuring and testing – Volume or rate of flow – By measuring vibrations or acoustic energy
Reexamination Certificate
2008-06-10
2008-06-10
Thompson, Jewel (Department: 2855)
Measuring and testing
Volume or rate of flow
By measuring vibrations or acoustic energy
Reexamination Certificate
active
07383740
ABSTRACT:
Pocket-size medical spirometer comprising a housing and a measurement unit (MU), for measuring rate of total flow when a user exhales through the spirometer. The MU comprises a fluidic jet oscillator adapted to generate oscillating flow with frequency dependent on the rate of flow therethrough. The MU is disposed within the housing so as to form a bypass flow path defined between an outer surface of the MU and an inner surface of the housing. A measurement flow path is defined through the fluidic jet oscillator, such that the total flow is divided into a bypass flow and a measurement flow, the latter being less than the former at least by an order of magnitude. The spirometer further comprises a pressure or velocity transducer and an electronic circuit adapted to derive the total flow rate or volume from the transducer signal.
REFERENCES:
patent: 3714828 (1973-02-01), Durkan
patent: 3797479 (1974-03-01), Graham
patent: 4182172 (1980-01-01), Wennberg et al.
patent: 4930357 (1990-06-01), Thurston et al.
patent: 5137026 (1992-08-01), Waterson et al.
patent: 5864067 (1999-01-01), Ligneul et al.
patent: 6216702 (2001-04-01), Gjersøe
patent: 6477900 (2002-11-01), Krasilchikov et al.
patent: 7094208 (2006-08-01), Williams et al.
patent: 2003/0191407 (2003-10-01), Williams et al.
patent: 135902 (2005-06-01), None
Krasilchikov Yehezkel
Litvak Anna
Shestatski Felix
Meyer Jerald
Richmond Derek
Spirojet Medical Ltd
The Nath Law Group
Thompson Jewel
LandOfFree
Spirometer does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Spirometer, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spirometer will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2811213