US3189301A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flotation device for helicopter
Assignee: Westland Group PLC
•
Filing: 1964-02-20
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Granted: 1965-06-15
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Expires: 1984-02-20
Abstract
No abstract record available.
Inventors
- 👤 Parkes Arthur
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 13:29
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/006; B64C35/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
88 words
IN COMBINATION, A HELICOPTER HAVING AT LEAST ONE MAIN ROTOR WITH A NORMAL VERTICAL CENTER PLANE OF THE HELICOPTER EXTENDING VERTICALLY THROUGH THE CENTER OF THE HELICOPTER IN THE NORMAL POSITION THEREOF, MEANS FOR SUPPORTING THE HELICOPTER FLOATING ON THE SIDE THEREOF WITH THE NORMAL VERTICAL PLANE SUBSTANTIALLY PARALLEL TO THE SURFACE OF THE WATER, SAID MEANS INCLUDING FRST FLOTATION APPARATUS MOUNTED ABOVE THE CENTER OF GRAVITY OF THE HELICOPTER IN THE NORMAL POSITION OF THE HELICOPTER, SAID FIRST FLOTATION APPARATUS BEING SYMMETRICAL ABOUT THE VERTICAL CENTER PLANE.
Claim 2
Dependent Claim
88 words
IN COMBINATION, A HELICOPTER HAVING AT LEAST ONE MAIN ROTOR WITH A NORMAL VERTICAL CENTER PLANE OF THE HELICOPTER EXTENDING VERTICALLY THROUGH THE CENTER OF THE HELICOPTER IN THE NORMAL POSITION THEREOF, MEANS FOR SUPPORTING THE HELICOPTER FLOATING ON THE SIDE THEREOF WITH THE NORMAL VERTICAL PLANE SUBSTANTIALLY PARALLEL TO THE SURFACE OF THE WATER, SAID MEANS INCLUDING FRST FLOTATION APPARATUS MOUNTED ABOVE THE CENTER OF GRAVITY OF THE HELICOPTER IN THE NORMAL POSITION OF THE HELICOPTER, SAID FIRST FLOTATION APPARATUS BEING SYMMETRICAL ABOUT THE VERTICAL CENTER PLANE.
References Cited (Backward Citations)
US2940700A
Cited
US3102705A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-06-14 | 1968-12-14 | 1969-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-06-14 | 1972-12-14 | 1973-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-06-14 | 1976-12-14 | 1977-06-15 | $7700.00 | Window Closed / Lapsed |