Patent US3302453A successfully refreshed from Google Patents.
US3302453A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of inspection utilizing ultrasonic energy
Assignee: AMF Inc
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Filing: 1963-04-15
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Granted: 1967-02-07
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Expires: 1983-04-15
Abstract
No abstract record available.
Inventors
- 👤 Fenton M Wood
- 👤 Noel B Proctor
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:41
CPC Classifications
G; G01; G01N; G01N29/00; G01N29/04; G01N29/043; G01N2291/00; G01N2291/04; G01N2291/042; G01N2291/0421; G01N2291/0422
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
187 words
THE METHOD OF INSPECTING A PREDETERMINED REGION OF A SOLID PART FOR FLAWS, SUCH AS THE LONGITUDINAL WELD IN A PIPE, COMPRISING THE STEPS OF: GENERATING A CONTINUOUS WAVE OF ULTRASONIC ENERGY; TRANSMITTING SAID WAVE OF ENERGY INTO THE SOLID PART VIA A COUPLING WEDGE AT A FIRST POINT ON A SURFACE OF THE PART WITH AN INCIDENT ANGLE OTHER THAN NORMAL TO THE SURFACE AND LESS THAN THE CRITICAL ANGLE FOR REFRACTED LONGITUDINAL WAVES, SO THAT REFRACTED LONGITUDINAL WAVES WILL BE TRANSMITTED IN A DIRECT PATH THROUGH THE WELD, SAID WAVES ALSO BEING DIRECTED AT AN ANGLE OTHER THAN NORMAL WITH RESPECT TO THE LONGITUDINAL AXIS OF THE WELD SO THAT A PORTION OF THE LONGITUDINAL REFRACTED WAVES WILL BE REFLECTED BY A FLAW IN THE WELD TO A SECOND POINT ON SAID SURFACE, SAID ANGLE ALSO BEING SUCH THAT REFRACTED SHEAR WAVES ARE DAMPENED BY REPEATED REFLECTIONS AND NOT RECEIVED AT SAID SECOND POINT, DETECTING SAID REFLECTED WAVES EMERGING FROM THE OBJECT AT AN ANGLE CORRESPONDING TO THE INCIDENT ANGLE AT SAID SECOND POINT, DETECTING AT A THIRD POINT SAID WAVES PASSED THROUGH THE WELD,
Claim 2
Independent Claim
187 words
THE METHOD OF INSPECTING A PREDETERMINED REGION OF A SOLID PART FOR FLAWS, SUCH AS THE LONGITUDINAL WELD IN A PIPE, COMPRISING THE STEPS OF: GENERATING A CONTINUOUS WAVE OF ULTRASONIC ENERGY; TRANSMITTING SAID WAVE OF ENERGY INTO THE SOLID PART VIA A COUPLING WEDGE AT A FIRST POINT ON A SURFACE OF THE PART WITH AN INCIDENT ANGLE OTHER THAN NORMAL TO THE SURFACE AND LESS THAN THE CRITICAL ANGLE FOR REFRACTED LONGITUDINAL WAVES, SO THAT REFRACTED LONGITUDINAL WAVES WILL BE TRANSMITTED IN A DIRECT PATH THROUGH THE WELD, SAID WAVES ALSO BEING DIRECTED AT AN ANGLE OTHER THAN NORMAL WITH RESPECT TO THE LONGITUDINAL AXIS OF THE WELD SO THAT A PORTION OF THE LONGITUDINAL REFRACTED WAVES WILL BE REFLECTED BY A FLAW IN THE WELD TO A SECOND POINT ON SAID SURFACE, SAID ANGLE ALSO BEING SUCH THAT REFRACTED SHEAR WAVES ARE DAMPENED BY REPEATED REFLECTIONS AND NOT RECEIVED AT SAID SECOND POINT, DETECTING SAID REFLECTED WAVES EMERGING FROM THE OBJECT AT AN ANGLE CORRESPONDING TO THE INCIDENT ANGLE AT SAID SECOND POINT, DETECTING AT A THIRD POINT SAID WAVES PASSED THROUGH THE WELD,
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) | 1970-02-06 | 1970-08-08 | 1971-02-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-06 | 1974-08-08 | 1975-02-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-06 | 1978-08-08 | 1979-02-07 | $7700.00 | Window Closed / Lapsed |