US3177712A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mass flow sensing units
Assignee: Elliott Treforest Ltd
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Filing: 1962-12-14
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Granted: 1965-04-13
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Expires: 1982-12-14
Abstract
No abstract record available.
Inventors
- 👤 Rowland A Brooking
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:09
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/76; G01F1/78; G01F1/80
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A MASS FLOW SENSING UNIT COMPRISING A CONDUIT THROUGH WHICH A FLUID MAY BE ARRANGED TO FLOW, A FIRST ROTOR MOUNTED WITHIN THE CONDUIT FOR ROTATION BY THE FLOW OF FLUID ABOUT AN AXIS RUNNING LENGTHWISE OF THE CONDUIT AND PROVIDED WITH HELICAL FLUID PASSAGEWAYS THERETHROUGH, A SECOND ROTOR MOUNTED COAXIALLY WITH THE FIRST ROTOR DOWNSTREAM THEREOF FOR ROTATION BY FLUID LEAVING THE FIRST ROTOR AND PROVIDED WITH FLUID PASSAGEWAYS RUNNING PARALLEL WITH THE SAID AXIS, RESTRAINING MEANS FOR APPLYING TO THE FIRST ROTOR A RESTRAINING TORQUE WHOSE MAGNITUDE IS PROPORTIONAL TO THE ANGULAR VELOCITY OF THE FIRST ROTOR, AND PICK-OFF DEVICES ASSOCIATED WITH THE TWO ROTORS, EACH PICK-OFF DEVICE BEING ARRANGED TO GENERATE AN ELECTRICAL SIGNAL DEPENDENT UPON THE ANGULAR VELOCITY OF ITS ASSOCIATED ROTOR.
Claim 2
Dependent Claim
126 words
A MASS FLOW SENSING UNIT COMPRISING A CONDUIT THROUGH WHICH A FLUID MAY BE ARRANGED TO FLOW, A FIRST ROTOR MOUNTED WITHIN THE CONDUIT FOR ROTATION BY THE FLOW OF FLUID ABOUT AN AXIS RUNNING LENGTHWISE OF THE CONDUIT AND PROVIDED WITH HELICAL FLUID PASSAGEWAYS THERETHROUGH, A SECOND ROTOR MOUNTED COAXIALLY WITH THE FIRST ROTOR DOWNSTREAM THEREOF FOR ROTATION BY FLUID LEAVING THE FIRST ROTOR AND PROVIDED WITH FLUID PASSAGEWAYS RUNNING PARALLEL WITH THE SAID AXIS, RESTRAINING MEANS FOR APPLYING TO THE FIRST ROTOR A RESTRAINING TORQUE WHOSE MAGNITUDE IS PROPORTIONAL TO THE ANGULAR VELOCITY OF THE FIRST ROTOR, AND PICK-OFF DEVICES ASSOCIATED WITH THE TWO ROTORS, EACH PICK-OFF DEVICE BEING ARRANGED TO GENERATE AN ELECTRICAL SIGNAL DEPENDENT UPON THE ANGULAR VELOCITY OF ITS ASSOCIATED ROTOR.
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) | 1968-04-12 | 1968-10-12 | 1969-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-12 | 1972-10-12 | 1973-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-12 | 1976-10-12 | 1977-04-13 | $7700.00 | Window Closed / Lapsed |