US3239930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing hollow tubular bodies
Assignee: SA de Recherches de Mecanique Appliquee SARMA
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Filing: 1965-05-10
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Granted: 1966-03-15
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Expires: 1985-05-10
Abstract
No abstract record available.
Inventors
- 👤 Violleau Andre
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:56
CPC Classifications
F; F16; F16G; F16G11/00; F16G11/12; B; B21; B21K; B21K1/00; B21K1/56; F16C; F16C7/00; F16C7/06; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49826; Y10T29/49908; Y10T29/49925; Y10T29/49927; Y10T403/00; Y10T403/29; Y10T403/295
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
111 words
A METHOD OF PRODUCING A HOLLOW TUBULAR BODY SUCH AS A CONNECTING ROD, COMPRISING INTRODUCING AN EXTERNALLY SCREW-THREADED MANDREL HAVING THREADS OF UNIFORM DIAMETER INTO ONE END PORTION OF A METAL TUBE, SUBJECTING SAID END PORTION TO RADIALLY INWARD COMPRESSION FROM THE ASSOCIATED END OF THE TUBE TOWARD THE OTHER END OF THE TUBE A DISTANCE LESS THAN THE DISTANCE OF EXTENSION OF THE THREADS OF THE MANDREL INTO THE TUBE THEREBY TO PRODUCE INTERNAL SCREW THREADS ON THE TUBE HAVING A DEPTH THAT DIMINISHES IN A DIRECTION TOWARD SAID OTHER END OF THE TUBE, AND THEREAFTER UNSCREWING THE MANDREL FROM THREADED ENGAGEMENT WITH THE REDUCED END PORTION OF THE TUBE.
Claim 2
Independent Claim
111 words
A METHOD OF PRODUCING A HOLLOW TUBULAR BODY SUCH AS A CONNECTING ROD, COMPRISING INTRODUCING AN EXTERNALLY SCREW-THREADED MANDREL HAVING THREADS OF UNIFORM DIAMETER INTO ONE END PORTION OF A METAL TUBE, SUBJECTING SAID END PORTION TO RADIALLY INWARD COMPRESSION FROM THE ASSOCIATED END OF THE TUBE TOWARD THE OTHER END OF THE TUBE A DISTANCE LESS THAN THE DISTANCE OF EXTENSION OF THE THREADS OF THE MANDREL INTO THE TUBE THEREBY TO PRODUCE INTERNAL SCREW THREADS ON THE TUBE HAVING A DEPTH THAT DIMINISHES IN A DIRECTION TOWARD SAID OTHER END OF THE TUBE, AND THEREAFTER UNSCREWING THE MANDREL FROM THREADED ENGAGEMENT WITH THE REDUCED END PORTION OF THE TUBE.
Claim 3
Independent Claim
86 words
A METHOD OF PRODUCING A HOLLOW TUBULAR BODY SUCH AS A CONNECTING ROD, COMPRISING SUBJECTING AT LEAST ONE END OF A METAL TUBE CONTAINING A SCREW-THREADED MANDREL TO REDUCE THE END OF THE TUBE TO SUBSTANTIALLY CYLINDRICAL FORM WHILE SIMULTANEOUSLY PRODUCING INTERNAL THREADING THEREON, PLACING A REINFORCING SLEEVE OOVER THE INTERNALLY THREADED REDUCED END PORTION, SUBJECTING SAID SLEEVE TO RADIALLY INWARD COMPRESSION TO REINFORCE SAID END OF THE TUBULAR BODY, AND THEREAFTER UNSCREWING THE MANDREL FROM THREADED ENGAGEMENT WITH THE REDUCED END PORTION OF THE TUBE.
Claim 4
Independent Claim
86 words
A METHOD OF PRODUCING A HOLLOW TUBULAR BODY SUCH AS A CONNECTING ROD, COMPRISING SUBJECTING AT LEAST ONE END OF A METAL TUBE CONTAINING A SCREW-THREADED MANDREL TO REDUCE THE END OF THE TUBE TO SUBSTANTIALLY CYLINDRICAL FORM WHILE SIMULTANEOUSLY PRODUCING INTERNAL THREADING THEREON, PLACING A REINFORCING SLEEVE OOVER THE INTERNALLY THREADED REDUCED END PORTION, SUBJECTING SAID SLEEVE TO RADIALLY INWARD COMPRESSION TO REINFORCE SAID END OF THE TUBULAR BODY, AND THEREAFTER UNSCREWING THE MANDREL FROM THREADED ENGAGEMENT WITH THE REDUCED END PORTION OF THE TUBE.
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) | 1969-03-14 | 1969-09-13 | 1970-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-03-14 | 1973-09-13 | 1974-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-03-14 | 1977-09-13 | 1978-03-15 | $7700.00 | Window Closed / Lapsed |