US3213659A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus and method for straightening metal shafts
Assignee: Ohio Crankshaft Co
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Filing: 1963-01-28
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Granted: 1965-10-26
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Expires: 1983-01-28
Abstract
No abstract record available.
Inventors
- 👤 Robert G Armstrong
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:34
CPC Classifications
B; B21; B21D; B21D3/00; B21D3/02; B21D3/04; Y; Y10; Y10S; Y10S72/00; Y10S72/702
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
83 words
A METHOD OF STRAIGHTENING A SHAFT COMPRISING THE FOLLOWING STEPS: HEATING THE SHAFT TO A SOMEWHAT PLIABLE CONDITION, PERIODICALLY AND REPEATEDLY STRESSING SUBSTANTIALLY ALL PORTIONS OF THE SHAFT BETWEEN A STATE OF COMPRESSION AND A STATE OF TENSION BY ROTATING SAID SHAFT WITH RESPECT TO A PHYSICAL RESTRAINT THE POSITION OF WHICH DETERMINES THE FLEXING AMPLUTIDE, GRADUALLY DECREASING THE FLEXING AMPLITUDE BY MOVING SAID RESTRAINT WITH RESPECT TO SAID HEATED SHAFT UNITL SAID AMPLITUDE IS SUBSTANTIALLY ZERO, AND ALLOWING SAID SHAFT TO COOL.
Claim 2
Independent Claim
83 words
A METHOD OF STRAIGHTENING A SHAFT COMPRISING THE FOLLOWING STEPS: HEATING THE SHAFT TO A SOMEWHAT PLIABLE CONDITION, PERIODICALLY AND REPEATEDLY STRESSING SUBSTANTIALLY ALL PORTIONS OF THE SHAFT BETWEEN A STATE OF COMPRESSION AND A STATE OF TENSION BY ROTATING SAID SHAFT WITH RESPECT TO A PHYSICAL RESTRAINT THE POSITION OF WHICH DETERMINES THE FLEXING AMPLUTIDE, GRADUALLY DECREASING THE FLEXING AMPLITUDE BY MOVING SAID RESTRAINT WITH RESPECT TO SAID HEATED SHAFT UNITL SAID AMPLITUDE IS SUBSTANTIALLY ZERO, AND ALLOWING SAID SHAFT TO COOL.
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) | 1968-10-25 | 1969-04-26 | 1969-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-25 | 1973-04-26 | 1973-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-25 | 1977-04-26 | 1977-10-26 | $7700.00 | Window Closed / Lapsed |