Integrated flow meter and vacuum gauge and use

Details Integrated flow meter and vacuum gauge and use Integrated flow meter and vacuum gauge and use

1988-07-25

1990-08-07

Goldstein, Herbert

Measuring and testing

Volume or rate of flow

Using differential pressure

73714, 73198, G01F 122

Patent

active

049457713

ABSTRACT:
A combination air flow and vacuum meter comprising a rigid transparent tubular housing having an inlet end, an opposite outlet end adapted for insertion into a central vacuum inlet or the like, a compression spring-mounted piston riding along an air flow controlling cone internal to the body, a vacuum guage mounted on the housing, and a reading scale on the housing that is calibrated with the spring and cone for indicating flow rate upon spring-loaded deflection of the piston. A plate or valve is attached to the housing and movable between open and closed positions to prevent air flow through the meter to measure vacuum in the closed position and to permit air flow through the meter to measure both vacuum and air flow rate in the open position.

REFERENCES:
patent: 2638582 (1950-05-01), Urso et al.
patent: 3218853 (1965-11-01), Ongaro
patent: 3477289 (1969-11-01), Wiebe
patent: 3554031 (1971-01-01), Turner
patent: 3759099 (1973-09-01), McGregor
patent: 3805611 (1974-04-01), Hedland
patent: 3979955 (1976-09-01), Schulte et al.
patent: 4112757 (1978-09-01), Hayward
patent: 4389901 (1983-06-01), Lake

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