Measuring and testing – Volume or rate of flow – Expansible chamber
Patent
1985-04-03
1987-02-10
Goldstein, Herbert
Measuring and testing
Volume or rate of flow
Expansible chamber
G01F 310
Patent
active
046415220
ABSTRACT:
A bearing-less positive displacement flowmeter is disclosed of the type having dual rotary pistons with inter-engaging blades. Bearing-less mounting of the rotary pistons is established by making the pistons out of sleeve bearing material and having them rotate about stainless steel shafts. The pistons are in tight clearance with the casing. Magnets on the piston blades interrupt the magnetic field of the front outside mounted pickup. The interrupted field results in a pulse, the frequency of which is a function of the RPM's of the pistons. Thus, the frequency is directly proportional to the flow rate.
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Goldstein Herbert
Wray James C.
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