Maximum and minimum gas flow sensor

Details Maximum and minimum gas flow sensor Maximum and minimum gas flow sensor

1982-08-04

1984-12-04

Rowland, James L.

Communications: electrical

Condition responsive indicating system

Specific condition

7386156, 7386157, 733225, 200 819R, 200 84B, 340611, G08B 2100

Patent

active

044867441

ABSTRACT:
A device for indicating the flow of gases includes a vertically extending conduit section in which is disposed a ball. The ball seats on a lower seat at zero or minimum gas flow, and on an upper seat at maximum sensed gas flow. The upper seat is configured to permit essentially unrestricted gas flow when the ball is seated on it.
Electrical means are associated with either the bottom seat and/or the top seat and co-acts with the ball to sense either minimum gas flow or maximum gas flow, and generate a signal responsive thereto.

REFERENCES:
patent: 487634 (1892-12-01), McDermott
patent: 849707 (1907-04-01), Willms
patent: 3024655 (1962-03-01), Dwyer et al.
patent: 3342138 (1967-09-01), Parks et al.
patent: 3390326 (1968-06-01), Imadate
patent: 3689908 (1972-09-01), Ray
patent: 3816680 (1974-06-01), Suzuki et al.
patent: 4308725 (1982-01-01), Chiyoda
IBM Technical Disclosure Bulletin, vol. 25, No. 7A; Dec. 1982; "Air Filter Clog Sensor" by Dunn et al.; pp. 3519-3520.

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