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EP0094352A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Flowmeter for liquids having an electrical data sensor and process for making it
Assignee: Individual
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Filing: 1983-05-09
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Granted: —
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Expires: 2003-05-09
Abstract
Abstract The flowmeter described is made for measuring the flow rate of a liquid as a function of the number of rotations of a propeller with radial expansions and rotating with an axis parallel to the direction of the flow. The propeller transmits the data without any mechanical connection through the walls of its conduit which is a simple straight pipe. The propeller has a specific weight equal or close to that of the fluid in which it is immersed. The smallness of its mass and its condition of floating in the fluid to be measured broaden the band of linearity in a flow rate ratio of 1 to 100 by using only a mechanical dimension of the flowmeter. The precision remains constant for any inclination or direction of mounting and for both directions of the fluid. The constructive simplicity and pronounced sensitivity to minimal flow rates makes it suitable to use a volumetric sensor for high-precision, low-cost calorimeters.
Inventors
- 👤 Ottorino Barbuti
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 17:45
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/115
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
127 words
Flowmeter with electronic sensing of data, suitable for measuring, with great precision and sensitivity, in a broad field of linear proportionality and in any position, direction and orientation that it is mounted, a wide range of fluid flow rates, also suitable for functioning as a dynamic calorimeter, characterized by a conduit consisting of a piece of pipe preferably straight in which a fan, witt a pin coaxial with the flow, rotates, the specific weight of the fan is very close to or identical with that of the fluid to be measured, so as not to weigh heavy on the bearings that support the pin; means being provided to transmi to the outside of the pipe magnetic, electromagnetic, electric or optical pulses at each rotation of the fan.
Claim 2
Dependent Claim
127 words
Flowmeter with electronic sensing of data, suitable for measuring, with great precision and sensitivity, in a broad field of linear proportionality and in any position, direction and orientation that it is mounted, a wide range of fluid flow rates, also suitable for functioning as a dynamic calorimeter, characterized by a conduit consisting of a piece of pipe preferably straight in which a fan, witt a pin coaxial with the flow, rotates, the specific weight of the fan is very close to or identical with that of the fluid to be measured, so as not to weigh heavy on the bearings that support the pin; means being provided to transmi to the outside of the pipe magnetic, electromagnetic, electric or optical pulses at each rotation of the fan.
Claim 3
Dependent Claim
86 words
Flowmeter as in claim 1, wherein said fan has radial blε des and inside the conduit, besides the cavity of the electrical, electromagnetic or electroluminous sensor, exhibits two laminar flow rectifiers in the shape of a daisy or star two gauze filters each containing a magnet functioning as a magnetic filter and two pockets carrying probes; said elements being arranged symmetrically so that sensing of the d ta is identical when the direction of flow of the fluid to be measured in the conduit is reversed.
Claim 4
Dependent Claim
82 words
Flowmeter as in claims 1 and 2, wherein the supports of the rotating body are made in the form of an arc of a circle concave toward the propeller having a radius calculated as a function of the index of thermal expansion of the mate rials from which both the arc and pin are made so that the variations in the chamber of eachy, due to thermal variation in the fluid, perfectly compensate the corresponding variations of length of the propeller pin.
Claim 5
Dependent Claim
69 words
Flowmeter as in claims 1 to 2, wherein hooks are provide to hold an outside container which can contain either the electrical or electronic circuit to operate either an internal or remote totalizer of the simple volume of the fluid that has passed, or to operate the same totalizer with the analog data provided by the rotation sensor and various probes, ahead of the data processed by this circuit.
Claim 6
Dependent Claim
52 words
Process for making the flowmeter as in claims 1, 2 and 3, wherein its rotating part is molded from thermoplastic by injection so that by a simple positioning of a punch of the die the volume of the part of the pin that is to be kept hollow is determined at will.
Claim 7
Dependent Claim
78 words
Process as in claim 5, wherein the radial expansions of the propeller are obtained by stamping of a metal sheet followed by an operation of simultaneous shearing and bending while two half pins are turned or stamped from metal and milled at one end with cusp profiles so that when placed against one another they are complementary, and when pressed against the center of the expansions, they produce a perfect centering and inclination during the final welding operation.
References Cited (Backward Citations)
No citation records indexed.
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