Bearing-less positive displacement flow meter
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United States of America Patent
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Mar 28, 1989
Grant Date -
N/A
app pub date -
Feb 2, 1987
filing date -
Apr 3, 1985
priority date (Note) -
Expired
status (Latency Note)
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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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