US3096041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Aircraft
Assignee: Power Jets Research and Development Ltd
•
Filing: 1960-12-20
•
Granted: 1963-07-02
•
Expires: 1980-12-20
Abstract
No abstract record available.
Inventors
- 👤 Cheeseman Ian Clifford
- 👤 Moss Charles Ernest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 06:44
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/22; B64C27/26
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
AN AIRCRAFT COMPRISING A FRUSELAGE; A TWO-BLADED HELICOPTER ROTOR COMPRISING A ROTOR HEAD ROTATABLY MOUNTED ON TOP OF THE FUSELAGE, TWO OPPOSITE ROTOR BLADES, OF SUBSTANTIALLY CIRCULAR CROSS-SECTION, MEAND LOCKING THE BLADES TO THE ROTOR HEAD IN AN OPERATIVE POSITION AT A PRE-DETERMINED CONE ANGLE IN WHICH THE ROTOR CAN ROTATE WITH THE BLADES CLEAR OF THE FUSELAGE, EACH BLADE COMPRISING AN OUTER SHELL AND AN INNER LINER COAXIAL THEREWITH, THE LINER DEFINING A SUBSTANTIALLY CIRCULAR SECTION PASSAGE AND THE SHELL AND LINER DEFINING BETWEEN THEM AN ANNULAR PASSAGE, BOTH PASSAGES EXTENDING LONGITUDINALLY OF THE BLADE, AND THE OUTER SHELL OF EACH BLADE BEING FORMED WITH AT LEAST ONE LONG SHALLOW APERTURE OPENING FORM THE ANNULAR PASSAGE AND EXTENDING ALONG THE BLADE; TIP JET UNITS MOUNTED ON THE EXTREMITIES OF THE BLADES AND CONNECTED TO BE SUPPLIED FROM SAID CIRCULAR SECTION PASSAGE; MEANS FOR MOVING THE ROTOR BLADES BE-
Claim 2
Dependent Claim
149 words
AN AIRCRAFT COMPRISING A FRUSELAGE; A TWO-BLADED HELICOPTER ROTOR COMPRISING A ROTOR HEAD ROTATABLY MOUNTED ON TOP OF THE FUSELAGE, TWO OPPOSITE ROTOR BLADES, OF SUBSTANTIALLY CIRCULAR CROSS-SECTION, MEAND LOCKING THE BLADES TO THE ROTOR HEAD IN AN OPERATIVE POSITION AT A PRE-DETERMINED CONE ANGLE IN WHICH THE ROTOR CAN ROTATE WITH THE BLADES CLEAR OF THE FUSELAGE, EACH BLADE COMPRISING AN OUTER SHELL AND AN INNER LINER COAXIAL THEREWITH, THE LINER DEFINING A SUBSTANTIALLY CIRCULAR SECTION PASSAGE AND THE SHELL AND LINER DEFINING BETWEEN THEM AN ANNULAR PASSAGE, BOTH PASSAGES EXTENDING LONGITUDINALLY OF THE BLADE, AND THE OUTER SHELL OF EACH BLADE BEING FORMED WITH AT LEAST ONE LONG SHALLOW APERTURE OPENING FORM THE ANNULAR PASSAGE AND EXTENDING ALONG THE BLADE; TIP JET UNITS MOUNTED ON THE EXTREMITIES OF THE BLADES AND CONNECTED TO BE SUPPLIED FROM SAID CIRCULAR SECTION PASSAGE; MEANS FOR MOVING THE ROTOR BLADES BE-
References Cited (Backward Citations)
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Cited
US2925129A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |