Measuring and testing – Volume or rate of flow – Combined
Patent
1985-12-16
1987-06-09
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Combined
7386163, 73756, 73 3, G01F 144, G01F 2500
Patent
active
046711090
ABSTRACT:
A flow measuring device comprises a flow tube having sequentially disposed inlet, converging and throat sections and first and second pressure sensing assemblies for sensing the pressures in the inlet and throat sections, respectively. Each of the pressure sensing assemblies includes a tubular housing portion which extends outwardly from the flow tube and communicates with the interior of the adjacent section thereof, a cylindrical diaphragm-type pressure sensing element which is slidably received in the housing portion, and a gate valve having a gate which is receivable in the housing portion thereof when the sensing element therein is in an outwardly disposed position in the housing portion. Each of the housing portions has a manometer tap formed therein which is disposed outwardly at the gate valve therein. Accordingly, each of the pressure sensing elements can be calibrated by moving it outwardly in its housing portion, closing the adjacent gate valve, connecting a manometer to the tap in the housing portion thereof and then opening the gate valve so that the manometer provides an indication of the pressure in the adjacent section of the flow tube.
REFERENCES:
patent: 2868013 (1959-01-01), Terrell
patent: 3821897 (1974-07-01), Frazel
patent: 3983756 (1976-10-01), Danguillier et al.
patent: 4096754 (1978-06-01), Beveridge, Jr. et al.
patent: 4435980 (1984-03-01), Schmidt
patent: 4466290 (1984-08-01), Frick
D. Halmi And Associates Inc.
Goldstein Herbert
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