Positive displacement flushable flow meter

Measuring and testing – Volume or rate of flow – Combined

Patent

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Details

73253, 73261, G01F 310, G01F 1512

Patent

active

049534033

ABSTRACT:
A positive displacement flushable flow meter has sensing elements that are rotated by and at a rate in accordance with a flow of fluid through the flow meter. The flow meter is particularly adapted for measuring the volume flow rate of coating material supplied to spray coating apparatus, and to permit the flow meter to be quickly flushed by means of alternate bursts of relatively high velocity air and solvent, without overdriving the sensing elements and damaging the flow meter, a bypass valve is provided. During a spray coating operation, the bypass valve is closed and all of the coating material flows past and rotates the sensing elements. During a flushing operation, the bypass valve is opened to divert some of the relatively high velocity flow of air and solvent around the sensing elements, while allowing a controlled and limited amount of air and solvent to move past and rotate the elements to clean them without causing them to be overdriven.

REFERENCES:
patent: 1119401 (1914-12-01), Clifford
patent: 1307337 (1919-06-01), Bassett
patent: 2258878 (1941-10-01), Bassler
patent: 3813940 (1974-06-01), Sommer
patent: 4400147 (1983-08-01), Springer et al.
patent: 4840063 (1989-06-01), Twerdochlib

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