Measuring and testing – Volume or rate of flow – By measuring transit time of tracer or tag
Patent
1983-07-18
1985-05-14
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
By measuring transit time of tracer or tag
7386132, G01F 170
Patent
active
045164339
ABSTRACT:
A fluid flow sensor for measuring the flow rate of a liquid stream, such as fuel, to an internal combustion engine. A pair of preformed body members are held together by external fasteners and provide internal cavities including a continuous oval shaped raceway containing a freely moveable ball. An inlet cavity connected to the raceway communicates with an inlet conduit through one body member and connectable to the liquid supply. An outlet conduit extends from the raceway through the other body member and is connectable to the liquid user or engine. Within the inlet cavity is a nozzle assembly that provides a first relatively small passage for liquid when it flows through the inlet conduit at a relatively slow rate and a second relatively large passage for liquid when it flows at a relatively high rate, so that even at low liquid flow rates, a sufficient force is produced at the nozzle exit to keep the race ball moving smoothly in the raceway. A suitable counter is provided for sensing each complete passage of the race ball in the raceway to provide a signal for use in measuring the flow rate of liquid therein.
REFERENCES:
patent: 2776568 (1957-01-01), Ward et al.
patent: 4157660 (1979-06-01), Spacek
patent: 4263812 (1981-04-01), Zeigner
MacIntosh John A.
Zeigner Willard L.
Goldstein Herbert
Zemco, Inc.
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