US3381361A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacture of bellows-type seals
Assignee: Commissariat à l'Énergie Atomique et Aux Énergies Alternatives
•
Filing: 1965-12-07
•
Granted: 1968-05-07
•
Expires: 1985-12-07
Abstract
No abstract record available.
Inventors
- 👤 Cuissart Jean Digard Brou De
- 👤 Lecluse Roger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 17:22
CPC Classifications
F; F16; F16L; F16L51/00; F16L51/02; F16L51/025; B; B26; B26D; B26D3/00; B26D3/16; B29; B29C; B29C53/00; B29C53/22; B29C53/30; B29D; B29D22/00; F16J; F16J3/00; F16J3/04; F16J3/048; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/4981; Y10T29/49826; Y10T29/49877; Y10T82/00; Y10T82/16; Y10T82/16016; Y10T83/00; Y10T83/04; Y10T83/0596
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
METHOD OF MANUFACTURE OF BELLOWS, SAID METHOD COMPRISING CENTERING A TUBULAR WORKPIECE ON A MANDREL, CUTTING CIRCULAR GROOVES IN THAT CYLINDRICAL FACE OF THE WORKPIECE WHICH IS NOT IN CONTACT WITH THE MANDREL, REMOVING SAID MANDREL FROM SAID GROOVED TUBULAR WORKPIECE, CENTERING THE BELLOWS BY MEANS OF A PART WHICH ENGAGES IN THE GROOVES FORMED IN THE FIRST CYLINDRICAL FACE, AND MACHINING GROOVES IN THE OTHER CYLINDRICAL FACE BETWEEN THE GROOVES OF THE FIRST FACE AFTER REMOVAL OF THE MANDREL.
Claim 2
Dependent Claim
80 words
METHOD OF MANUFACTURE OF BELLOWS, SAID METHOD COMPRISING CENTERING A TUBULAR WORKPIECE ON A MANDREL, CUTTING CIRCULAR GROOVES IN THAT CYLINDRICAL FACE OF THE WORKPIECE WHICH IS NOT IN CONTACT WITH THE MANDREL, REMOVING SAID MANDREL FROM SAID GROOVED TUBULAR WORKPIECE, CENTERING THE BELLOWS BY MEANS OF A PART WHICH ENGAGES IN THE GROOVES FORMED IN THE FIRST CYLINDRICAL FACE, AND MACHINING GROOVES IN THE OTHER CYLINDRICAL FACE BETWEEN THE GROOVES OF THE FIRST FACE AFTER REMOVAL OF THE MANDREL.
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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |