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US 5,307,686 AGranted
Device for measuring the rate of flow of a flowing fluid
OwnerAnders Noreninventor
Life of this patent
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Abstract
A device for measuring the rate of flow of a fluid flowing in a closed conduit includes a rotor whose speed of rotation is directly dependent on the flow rate of the fluid. The rotor is carried symmetrically on a shaft which extends substantially at right angles to the longitudinal axis of the conduit. The rotor includes measuring means in the form of bores provided therein, and a light-conductor is provided for determining the rotational speed of the rotor. The rotor preferably consists of a circular plate.
Claims9
A device for measuring the rate of flow of a fluid flowing in a closed and substantially unobstructed flow passage, said device comprising:
- a single rotor having the form of a circular planar plate, said plate being fully surrounded by the fluid, the speed of rotation of the rotor being directly dependent on the flow rate of the fluid in said flow passage, said rotor being carried symmetrically by a shaft which extends substantially at right angles to the longitudinal axis of the flow passage, said rotor shaft being located asymmetrically in relation to the median line of the flow passage in a cross-section through the flow passage and through the rotor shaft so that as the fluid flows the rotor will obtain a resultant torque and begin to rotate, the rotor surfaces over which the fluid flows being configured so that torque-generating forces occur substantially only as a result of the friction of the fluid against said surfaces;
- and means for determining the rotational speed of the rotor.
Dependencies are inferred from the claim text.