Measuring and testing – Volume or rate of flow – Proportional
Patent
1984-09-25
1986-01-21
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Proportional
7386165, 73 3, G01F 146
Patent
active
045650926
ABSTRACT:
A flow sensor having adjustable sensitivity includes a differential pressure sensing element located in an internal compartment within a rotatable cylinder. The compartment is connected between diametrically opposite fluid ports on the surface of the cylinder by fluid channels. In one embodiment, the sensor is located on a diaphragm partitioning the compartment into a first and a second chamber with the sensor being responsive to a distortion of the diaphragm induced by a differential pressure. In a second embodiment, the sensor is a flow sensor and is arranged to monitor a fluid flow through the compartment induced by a differential pressure. The cylinder is rotatable on an axis at located right angles to a fluid flow thereacross whereby the ports are selectively located at a desired angle with respect to the fluid flow path. The cylinder is located within a fluid-tight housing having a fluid inlet and a fluid outlet arranged to direct a fluid being monitored by the sensor around the cylinder. An external adjusting knob is connected to the axis of the cylinder through a first fluid-tight access opening in the housing to provide a means for selectively rotating the cylinder. Electrical connections to the pressure sensing element are provided through a second fluid-tight access opening in the housing.
REFERENCES:
patent: 1295046 (1919-02-01), Lohnes
patent: 2207880 (1940-07-01), Skoldberg
patent: 2297408 (1942-09-01), Hardebeck
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patent: 2862387 (1958-12-01), Webster
patent: 3382715 (1968-05-01), Larkham et al.
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patent: 3777563 (1973-12-01), Yamasaki et al.
patent: 3803921 (1974-04-01), Dieterich
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Goldstein Herbert
Halista Mitchell J.
Honeywell Inc.
Joike Trevor B.
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