US3738170A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flow meter for measuring small quantities of liquid fuel
Assignee: Individual
•
Filing: 1971-07-02
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Granted: 1973-06-12
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Expires: 1991-07-02
Abstract
Abstract A flow meter for measuring small quantities particularly of liquid fuels. A chamber is provided with cups mounted to rotate in a paddle wheel manner by the flow of liquid. Magnets of opposite polarity are carried by each cup. An electromagnet magnet alternately attracts and repels the cups to bring then into filling and them emptying position. A reed switch is actuated by the magnets to provide a measure of flow and reverse the polarity of the electromagnet.
Inventors
- 👤 S Maeshiba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:27
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/24; G01F3/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
196 words
A flow meter for measuring small quantities of liquids, which meter comprises: means for supplying a downwardly directed stream of a liquid to be measured, a plurality of cups mounted to rotate about a horizontal axis in a path which brings said cups successively into a receiving position beneath said downwardly directed stream, an electromagnet adjacent said receiving position, and a magnet carried by each cup, each cup-carried magnet having a pole located to be attracted by said electromagnet when near said receiving position with a force insufficient to overcome the force exerted by gravity when only one of said cups is full of said liquid, and those poles of the magnets on adjacent cups which are positioned to be thus attracted being of opposite polarity, a reed switch positioned to be thrown by one of the magnets on said cups whenever a cup departs from said receiving position, means for reversing the polarity of said electromagnet in response to operation of said reed switch, and means actuated by said reed switch for indicating the volume of flow of said liquid as a function of the number of departures of a cup from said receiving position.
Claim 2
Dependent Claim
196 words
A flow meter for measuring small quantities of liquids, which meter comprises: means for supplying a downwardly directed stream of a liquid to be measured, a plurality of cups mounted to rotate about a horizontal axis in a path which brings said cups successively into a receiving position beneath said downwardly directed stream, an electromagnet adjacent said receiving position, and a magnet carried by each cup, each cup-carried magnet having a pole located to be attracted by said electromagnet when near said receiving position with a force insufficient to overcome the force exerted by gravity when only one of said cups is full of said liquid, and those poles of the magnets on adjacent cups which are positioned to be thus attracted being of opposite polarity, a reed switch positioned to be thrown by one of the magnets on said cups whenever a cup departs from said receiving position, means for reversing the polarity of said electromagnet in response to operation of said reed switch, and means actuated by said reed switch for indicating the volume of flow of said liquid as a function of the number of departures of a cup from said receiving position.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |