Patent US2137548A successfully refreshed from Google Patents.
US3299702A
Expired / Lapsed
US
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Fluid flow direction indicator
Assignee: Halliburton Co
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Filing: 1963-11-19
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Granted: 1967-01-24
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Expires: 1983-11-19
Abstract
No abstract record available.
Inventors
- 👤 Jack R Hulme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:12
CPC Classifications
G; G01; G01F; G01F1/00; G01F1/05; G01F1/10; G01F1/115
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN APPARATUS FOR DETERMINING THE DIRECTION OF FLUID FLOW IN A CONDUIT COMPRISING: (A) A VANED ROTOR AXIALLY DISPOSED WITHIN A CONDUIT, (B) FIRST AND SECOND SENSING MEANS MOUNTED ADJACENT SAID ROTOR FOR PRODUCING FIRST AND SECOND ELECTRICAL SIGNALS, AT A RELATIVE PHASE ANGLE OF BETWEEN 10 AND 170 ELECTRICAL DEGREES IN RESPONSE TO THE PASSAGE OF EACH ROTOR VANE PAST SAID MEANS, AND (C) COINCIDENCE MEANS FOR DETERMINING THE RELATIVE TIME PRECEDENCE OF EACH FIRST AND SECOND SIGNAL, WHEREBY ONE ORDER OF PRECEDENCE INDICATES A FIRST FLUID FLOW DIRECTION AND A REVERSE ORDER OF PRECEDENCE INDICATES A SECOND, REVERSE FLUID FLOW DIRECTION.
Claim 2
Independent Claim
103 words
AN APPARATUS FOR DETERMINING THE DIRECTION OF FLUID FLOW IN A CONDUIT COMPRISING: (A) A VANED ROTOR AXIALLY DISPOSED WITHIN A CONDUIT, (B) FIRST AND SECOND SENSING MEANS MOUNTED ADJACENT SAID ROTOR FOR PRODUCING FIRST AND SECOND ELECTRICAL SIGNALS, AT A RELATIVE PHASE ANGLE OF BETWEEN 10 AND 170 ELECTRICAL DEGREES IN RESPONSE TO THE PASSAGE OF EACH ROTOR VANE PAST SAID MEANS, AND (C) COINCIDENCE MEANS FOR DETERMINING THE RELATIVE TIME PRECEDENCE OF EACH FIRST AND SECOND SIGNAL, WHEREBY ONE ORDER OF PRECEDENCE INDICATES A FIRST FLUID FLOW DIRECTION AND A REVERSE ORDER OF PRECEDENCE INDICATES A SECOND, REVERSE FLUID FLOW DIRECTION.
References Cited (Backward Citations)
GB762499A
Cited
US3029637A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |