US3353401A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for inducing fatigue cracks in structural materials
Assignee: ATK Launch Systems LLC
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Filing: 1965-08-23
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Granted: 1967-11-21
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Expires: 1985-08-23
Abstract
No abstract record available.
Inventors
- 👤 Richard O Hessler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 22:24
CPC Classifications
G; G01; G01N; G01N3/00; G01N3/32; G01N3/36; G01N2203/00; G01N2203/003; G01N2203/0042; G01N2203/0058; G01N2203/006; G01N2203/0062; G01N2203/0064
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
137 words
AN APPARATUS FOR INDUCING FATIQUE CRACKS IN A PRESSURE VESSEL COMPRISING FIRST AND SECOND MEMBERS THAT ARE POSITIONED ON OPPOSITE SURFACES OF THE PRESSURE VESSEL IN ALINED RELATION TO EACH OTHER, SAID FIRST MEMBER HAVING AN OPENING THEREIN, SAID SEC OND MEMBER HAVING A CAVITY THEREIN THAT IS ALIGNED WITH THE OPENING IN SAID FIRST MEMBER, SAID FIRST AND SECOND MEMBERS CONFORMING IN SHAPE TO THE CONFIGURATION OF SAID PRESSURE VESSEL AND EACH OF SAID MEMBERS COMPRISE A PLURALITY OF SECTIONS OF SIMILAR CONFIGURATION, MEANS ENGAGING SAID SECTIONS FOR RETAINING THE SECTIONS OF EACH OF SAID MEMBERS IN RIGID RELATION TO EACH OTHER, AND MEANS FOR INTERMITTENTLY INJECTING A PRESSURIZED FLUID INTO SAID CAVITY WHEREBY THAT PORTION OF THE PRESSURE VESSEL INTERPOSED BETWEEN SAID FIRST AND SECOND MEMBERS IS FLEXED UNDER THE FORCE OF THE PRESSURIZED FLUID.
Claim 2
Independent Claim
137 words
AN APPARATUS FOR INDUCING FATIQUE CRACKS IN A PRESSURE VESSEL COMPRISING FIRST AND SECOND MEMBERS THAT ARE POSITIONED ON OPPOSITE SURFACES OF THE PRESSURE VESSEL IN ALINED RELATION TO EACH OTHER, SAID FIRST MEMBER HAVING AN OPENING THEREIN, SAID SEC OND MEMBER HAVING A CAVITY THEREIN THAT IS ALIGNED WITH THE OPENING IN SAID FIRST MEMBER, SAID FIRST AND SECOND MEMBERS CONFORMING IN SHAPE TO THE CONFIGURATION OF SAID PRESSURE VESSEL AND EACH OF SAID MEMBERS COMPRISE A PLURALITY OF SECTIONS OF SIMILAR CONFIGURATION, MEANS ENGAGING SAID SECTIONS FOR RETAINING THE SECTIONS OF EACH OF SAID MEMBERS IN RIGID RELATION TO EACH OTHER, AND MEANS FOR INTERMITTENTLY INJECTING A PRESSURIZED FLUID INTO SAID CAVITY WHEREBY THAT PORTION OF THE PRESSURE VESSEL INTERPOSED BETWEEN SAID FIRST AND SECOND MEMBERS IS FLEXED UNDER THE FORCE OF THE PRESSURIZED FLUID.
References Cited (Backward Citations)
US2194914A
Cited
US2826063A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-11-20 | 1971-05-22 | 1971-11-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-11-20 | 1975-05-22 | 1975-11-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-11-20 | 1979-05-22 | 1979-11-21 | $7700.00 | Window Closed / Lapsed |