US3231222A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotary wing aircraft
Assignee: MOSLEY LONNIE G
•
Filing: 1964-05-20
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Granted: 1966-01-25
•
Expires: 1984-05-20
Abstract
No abstract record available.
Inventors
- 👤 Wilbur J Scheutzow
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:15
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C1/00; B64C1/06; B64C27/32; B64C27/35; B64C27/54; B64C27/58; B64C27/59; B64C27/625
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
150 words
A HELICOPTER COMPRISING A COMBINATION A FUSELAGE, A MAST CONSTRUCTED AS AN UPSTANDING SPRING SHAFT CONNECTED TO SAID FUSELAGE, SAID MAST BEING FIXED AGIANST ROTATION AND HAVING AN ELONGATED CANTILEVER PORTION EXTENDING ABOVE SAID FUSELAGE, A SUBSTAINING ROTOR CARRIED BY SAID MAST PORTION, A DRIVE TRANSMISSION SUPPORTED BY SAID MAST PORTION NEAR ITS UPPER END, SAID TRANSMISSION BEING IN PROXIMITY TO SAID ROTOR, MEANS CONNECTING SAID TRANSMISSION TO SAID ROTOR, AN ENGINE MOUNTED ON SAID FUSELAGE BELOW SAID ROTOR, DRIVE MEANS CONNECTING SAID ENGINE TO SAID TRANSMISSION, AND THE LENGTH OF SAID MAST PORTION AND THE WEIGHT OF SAID TRANSMSSION AND SAID ROTOR BEING SUCH THAT THE ASSEMBLY OF SAID MAST AND SUPPORTED TRANSMISSION AND ROTOR HAS A LOW FREQUENCY CHARACTERISTIC IN CYCLES PER MINUTE WHICH IS LESS THAN THE OPERATING REVOLUTIONS PER MINUTE OF THE ROTOR SO THAT VIBRATIONS OF THE ROTOR SYSTEM ARE EFFECTIVELY ISOLATED FROM SAID FUSELAGE.
Claim 2
Dependent Claim
150 words
A HELICOPTER COMPRISING A COMBINATION A FUSELAGE, A MAST CONSTRUCTED AS AN UPSTANDING SPRING SHAFT CONNECTED TO SAID FUSELAGE, SAID MAST BEING FIXED AGIANST ROTATION AND HAVING AN ELONGATED CANTILEVER PORTION EXTENDING ABOVE SAID FUSELAGE, A SUBSTAINING ROTOR CARRIED BY SAID MAST PORTION, A DRIVE TRANSMISSION SUPPORTED BY SAID MAST PORTION NEAR ITS UPPER END, SAID TRANSMISSION BEING IN PROXIMITY TO SAID ROTOR, MEANS CONNECTING SAID TRANSMISSION TO SAID ROTOR, AN ENGINE MOUNTED ON SAID FUSELAGE BELOW SAID ROTOR, DRIVE MEANS CONNECTING SAID ENGINE TO SAID TRANSMISSION, AND THE LENGTH OF SAID MAST PORTION AND THE WEIGHT OF SAID TRANSMSSION AND SAID ROTOR BEING SUCH THAT THE ASSEMBLY OF SAID MAST AND SUPPORTED TRANSMISSION AND ROTOR HAS A LOW FREQUENCY CHARACTERISTIC IN CYCLES PER MINUTE WHICH IS LESS THAN THE OPERATING REVOLUTIONS PER MINUTE OF THE ROTOR SO THAT VIBRATIONS OF THE ROTOR SYSTEM ARE EFFECTIVELY ISOLATED FROM SAID FUSELAGE.
References Cited (Backward Citations)
FR32011E
Cited
US2318259A
Cited
US2481749A
Cited
US2818226A
Cited
US2827251A
Cited
GB752220A
Cited
US2960168A
Cited
US2949967A
Cited
US3029048A
Cited
US3112088A
Cited
US3153521A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-24 | 1969-07-26 | 1970-01-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-24 | 1973-07-26 | 1974-01-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-24 | 1977-07-26 | 1978-01-25 | $7700.00 | Window Closed / Lapsed |