Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1993-12-21
1995-04-04
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Using differential pressure
G01F 146
Patent
active
054026873
ABSTRACT:
A pitot of the type adapted to be positioned in a stream of moving fluid such as an air duct and accurately measures wide variations in flow rate. A first plate with opposing sides and opposing leading and trailing edges and a second plate has opposing sides and opposing leading and trailing edges. The plates are parallel to each other and are in overlying spaced relation. A first tube has a proximal end and a distal end and is connected in sandwich fashion between the first and second plates proximate the leading edges. The tube has a plurality of holes defining openings located proximate the leading edges of the plates, the holes being perpendicular to the plate surfaces. A second tube has a proximal and a distal end and is also connected in sandwich fashion between the plates, parallel to the first tube, proximate the trailing edges of the plates. Also provided are holes defining openings in the tube that are parallel to the surface of the plates. At the proximal end of the first tube the total pressure is sensed and at the proximal end of the second tube, the static pressure is sensed, the difference therebetween being the velocity pressure.
REFERENCES:
patent: 1250238 (1917-12-01), Spitzglass
patent: 4444060 (1984-04-01), Yamamoto
Goldstein Herbert
Rosenthal Robert G.
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