US3330362A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helicopter rotor
Assignee: Lockheed Martin Corp
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Filing: 1966-05-31
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Granted: 1967-07-11
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Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Kastan Howard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:42
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/32; B64C27/33
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
IN A HELICOPTER ROTOR SYSTEM HAVING A ROTOR MAST AND A PLURALITY OF ROTOR BLADES: A BEAM HAVING FIRST AND SECOND END SECTIONS AND A PLURAL PART CENTRAL SECTION INTERPOSED THEREBETWEEN; ONE OF SAID END SECTIONS BEING ADAPTED TO BE COUPLED TO SAID MAST AND THE OTHER SAID END SECTION BEING ADAPTED TO BE COUPLED TO SAID BLADE; AND MEANS DEFINING A PLURALITY OF LONGITUDINAL SLOTS DISPOSED IN EACH PART OF SAID CENTRAL SECTION MAKING SAID BEAM FLEXIBLE SUBSTANTIALLY EQUALLY IN THE PLANE OF ROTOR ROTATION AND IN THE FLAPPING PLANE AT 90 DEGREES TO THE PLANE OF ROTOR ROTATION.
Claim 2
Dependent Claim
100 words
IN A HELICOPTER ROTOR SYSTEM HAVING A ROTOR MAST AND A PLURALITY OF ROTOR BLADES: A BEAM HAVING FIRST AND SECOND END SECTIONS AND A PLURAL PART CENTRAL SECTION INTERPOSED THEREBETWEEN; ONE OF SAID END SECTIONS BEING ADAPTED TO BE COUPLED TO SAID MAST AND THE OTHER SAID END SECTION BEING ADAPTED TO BE COUPLED TO SAID BLADE; AND MEANS DEFINING A PLURALITY OF LONGITUDINAL SLOTS DISPOSED IN EACH PART OF SAID CENTRAL SECTION MAKING SAID BEAM FLEXIBLE SUBSTANTIALLY EQUALLY IN THE PLANE OF ROTOR ROTATION AND IN THE FLAPPING PLANE AT 90 DEGREES TO THE PLANE OF ROTOR ROTATION.
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) | 1970-07-10 | 1971-01-09 | 1971-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-07-10 | 1975-01-09 | 1975-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-07-10 | 1979-01-09 | 1979-07-11 | $7700.00 | Window Closed / Lapsed |