Measuring and testing – Volume or rate of flow – System
Patent
1978-09-25
1979-09-18
Woodiel, Donald O.
Measuring and testing
Volume or rate of flow
System
137835, G01P 100
Patent
active
041678737
ABSTRACT:
A flow meter comprising a fluidic switching device coupled as a free-running oscillator. The frequency is dependent on the flow rate of the medium. The device called a fluidistor has a nozzle (edges) arranged upstream of the control chambers and a first region downstream of the control chambers, within which first region the flow of medium lies either on one side or the other side in dependence upon the pressure conditions and flow conditions prevailing in the oscillator circuit. A second region is located downstream of said first region. Mutually spaced apart orifices of a cross-connecting line, said orifices preferably being arranged transversely to the flow direction, are arranged at a location at which the stream of fluid is deflected, in a manner such that said orifices are coupled together, through a line. In said line is a pressure-sensing device arranged to generate a signal corresponding to the measuring result and that said deflection location is placed downstream of the control chambers.
REFERENCES:
patent: 3690171 (1972-09-01), Tippetts
Fluid Inventor AB
Woodiel Donald O.
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