Electronic flow transducer assembly

Details Electronic flow transducer assembly Electronic flow transducer assembly

1985-03-18

1986-04-15

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Using differential pressure

7386152, G01F 138

Patent

active

045819440

ABSTRACT:
A flow rate sensor including a diaphragm having a first side in fluid communication with a Venturi and a flow conduit. With flow through the conduit, the diaphragm travels downwardly, the extent of travel being determined by the flow rate. A permanent magnet assembly is coupled to the second side of the diaphragm for movement therewith and a Hall effect sensor assembly is fixed on the housing along a line which is an extension of the line of travel of the permanent magnet. Accordingly, the output from the Hall effect sensor is related to the distance between the magnet and the sensor and, thus, to the flow rate through the conduit. In order to prevent fluid from backing up into the vacuum area under the diaphragm when fluid flow is stopped, a check valve is interposed between the Venturi and the diaphragm. The check valve includes a ball having a lower density than the fluid which cooperates with a valve seat in the passageway leading to the diaphragm.

REFERENCES:
patent: 1652941 (1927-12-01), Isaac
patent: 2186872 (1940-01-01), Klein
patent: 2406181 (1946-08-01), Wiegand
patent: 2521244 (1950-09-01), Moore, Jr.
patent: 2886968 (1959-05-01), Johnson et al.
patent: 4005847 (1977-02-01), Ekman
patent: 4212200 (1980-07-01), Rousseau et al.
patent: 4487074 (1984-12-01), Herden
patent: 4507976 (1985-04-01), Banito

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