Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1998-10-30
2000-12-26
Patel, Hashad
Measuring and testing
Volume or rate of flow
Using differential pressure
7386152, 600538, G01F 142
Patent
active
061641421
ABSTRACT:
An air flow measurement device includes a connector conduit for the air flow having a transverse restrictor plate located therein with a plurality of uniform and uniformly spaced apertures extending therethrough. The restrictor plate is maintained in the connector conduit by a pair of sleeves each of which includes on its interior diameter a plurality of angularly spaced passages and on its outer diameter a circumferential groove communicating with the passages. A pair of valves are mounted through the wall of the connector conduit for communication with the circumferential grooves so that a differential pressure meter may be connected to the valves to measure the difference in pressure upstream and downstream of the restrictor plate to thereby determine the flow rate. The sleeves may be made in two identical pieces to form the passages and grooves, and additional smoothing screens may be positioned upstream and downstream of the restrictor plate by further identical sleeve pieces.
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Kelly Robert S.
Patel Hashad
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