Measuring and testing – Volume or rate of flow – Using differential pressure
Patent
1981-06-15
1984-01-10
Goldberg, Gerald
Measuring and testing
Volume or rate of flow
Using differential pressure
73DIG5, G01F 124
Patent
active
044247168
ABSTRACT:
A mechanical flowmeter is provided for measuring the flow of hydraulic fluid in a system in which the flowmeter is connected. The flowmeter contains a spring biased piston which is responsive to the rate of flow through an annular space surrounding the piston as it moves in a tapered bore. A toroidal armature of ferrous (magnetic) material is mounted on a rod extending from the piston for movement therewith. Movement of the armature and the piston rod within a hollow guide is tracked by a permanent magnet of toroidal shape which is mounted surrounding the guide in sliding relationship. A sight glass surrounding the guide and magnet is calibrated with a scale for converting the position of the magnet to an indication of flow rate. For fluid flow in the reverse direction, the piston is moved out of the tapered bore, thus permitting free flow in the reverse direction with minimal energy loss.
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Boehringer Wilfred E.
Walker James V.
Bissell Henry M.
Chapman, Jr. John E.
Finch George W.
Goldberg Gerald
McDonnell Douglas Corp.
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