US3322200A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor masts
Assignee: Sud Aviation Societe Nationale de Constructions Aerdnaettiques
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Filing: 1965-05-11
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Granted: 1967-05-30
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Expires: 1985-05-11
Abstract
No abstract record available.
Inventors
- 👤 Tresch Charles Henry
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:33
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
A ROTOR MAST FOR A HELICOPTER HAVING THE CONFIGURATION OF A SINGLE HOLLOW PART FORMING SIMULTANEOUSLY A SHAFT AND UPPER BLADE ATTACHING FLANGE FOR ATTACHING THE BLADES OF THE ROTOR, COMPRISING IN COMBINATION, SITUATED IMMEDIATELY BENEATH SAID UPPER FLANGE, A PORTION FLARED UPWARDLY TOWARD SAID FLANGE, A BLADE ATTACHING BASE NEARLY ADJACENT THE NARROWEST PART OF SAID FLARED PORTION, A NEARLY CYLINDRICAL SURFACE BLENDING WITH SAID NARROWEST PART OF SAID FLARED PORTION, SAID NEARLY CYLINDRICAL SURFACE INCLUDING AN ABUTMENT RECEIVING COLLAR AND A THREADED PART AT DISTANCE FROM SAID COLLAR, AND POWER TAKE-OFF MEANS AT A LOWER END OF SAID NEARLY CYLINDRICAL SURFACE.
Claim 2
Dependent Claim
103 words
A ROTOR MAST FOR A HELICOPTER HAVING THE CONFIGURATION OF A SINGLE HOLLOW PART FORMING SIMULTANEOUSLY A SHAFT AND UPPER BLADE ATTACHING FLANGE FOR ATTACHING THE BLADES OF THE ROTOR, COMPRISING IN COMBINATION, SITUATED IMMEDIATELY BENEATH SAID UPPER FLANGE, A PORTION FLARED UPWARDLY TOWARD SAID FLANGE, A BLADE ATTACHING BASE NEARLY ADJACENT THE NARROWEST PART OF SAID FLARED PORTION, A NEARLY CYLINDRICAL SURFACE BLENDING WITH SAID NARROWEST PART OF SAID FLARED PORTION, SAID NEARLY CYLINDRICAL SURFACE INCLUDING AN ABUTMENT RECEIVING COLLAR AND A THREADED PART AT DISTANCE FROM SAID COLLAR, AND POWER TAKE-OFF MEANS AT A LOWER END OF SAID NEARLY CYLINDRICAL SURFACE.
References Cited (Backward Citations)
GB652817A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |