US3209243A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Magnetic flaw detection devices
Assignee: AMF Inc
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Filing: 1961-09-21
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Granted: 1965-09-28
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Expires: 1981-09-21
Abstract
No abstract record available.
Inventors
- 👤 William T Walters
- 👤 Mahan L Reeme
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:56
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/72; G01N27/82; G01N27/90; E; E21; E21B; E21B47/00; E21B47/08; E21B47/085; G01N27/9093
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
162 words
IN AN INSPECTION DEVICE FOR DETECTING DISCONTINUITIES IN THE INNER SURFACE OF A TUBULAR FERROMAGNETIC MEMBER, THE COMBINATION OF MAGNETIC MEANS FOR INDUCING LONGITUDINAL MEANS FLUX IN THE TUBULAR MEMBER; AND SENSING MEANS COMPRISING A CONICAL MEMBER HAVING A BASE DIAMETER GREATER THAN THE INSIDE DIAMETER OF THE TUBULAR MEMBER, A POITIONABLE UNIT EXTENDING SLIDABLY THROUGH THE CENTER OF SAID CONICAL MEMBER, SAID POSITIONABLE UNIT INCLUDING A CENTERING MEANS AT ONE END SO THAT WHEN SAID CONICAL MEMBER IS POSITIONED IN THE END OF THE TUBULAR MEMBER AND SAID CENTERING MEANS IS WITHIN THE TUBULAR MEMBER THE POSITIONABLE UNIT IS AXIALLY ALIGNED WITHIN THE TUBULAR MEMBER, A PLURALITY OF MAGNETIC-RESPONSIVE MEANS MOUNTED ON SAID POSITIONABLE UNIT, MEANS MAINTAINING SAID MAGNETIC-RESPONSIVE MEANS CLOSELY ADJACENT THE INNER SURFACE OF THE TUBULAR MEMBER TO SENSE CHANGES IN LEAKAGE FLUS THEREFROM, AND POSITIONING MEANS MOUNTED ON SAID CONICAL MEMBER OPERATIVE TO CONTROL THE AXIAL AND ANGULAR POSITION OF SAID POSITIONABLE UNIT RELATIVE TO SAID CONICAL MEMBER.
Claim 2
Dependent Claim
162 words
IN AN INSPECTION DEVICE FOR DETECTING DISCONTINUITIES IN THE INNER SURFACE OF A TUBULAR FERROMAGNETIC MEMBER, THE COMBINATION OF MAGNETIC MEANS FOR INDUCING LONGITUDINAL MEANS FLUX IN THE TUBULAR MEMBER; AND SENSING MEANS COMPRISING A CONICAL MEMBER HAVING A BASE DIAMETER GREATER THAN THE INSIDE DIAMETER OF THE TUBULAR MEMBER, A POITIONABLE UNIT EXTENDING SLIDABLY THROUGH THE CENTER OF SAID CONICAL MEMBER, SAID POSITIONABLE UNIT INCLUDING A CENTERING MEANS AT ONE END SO THAT WHEN SAID CONICAL MEMBER IS POSITIONED IN THE END OF THE TUBULAR MEMBER AND SAID CENTERING MEANS IS WITHIN THE TUBULAR MEMBER THE POSITIONABLE UNIT IS AXIALLY ALIGNED WITHIN THE TUBULAR MEMBER, A PLURALITY OF MAGNETIC-RESPONSIVE MEANS MOUNTED ON SAID POSITIONABLE UNIT, MEANS MAINTAINING SAID MAGNETIC-RESPONSIVE MEANS CLOSELY ADJACENT THE INNER SURFACE OF THE TUBULAR MEMBER TO SENSE CHANGES IN LEAKAGE FLUS THEREFROM, AND POSITIONING MEANS MOUNTED ON SAID CONICAL MEMBER OPERATIVE TO CONTROL THE AXIAL AND ANGULAR POSITION OF SAID POSITIONABLE UNIT RELATIVE TO SAID CONICAL MEMBER.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |