Patent US4046335A successfully refreshed from Google Patents.
US4046335A
Expired / Lapsed
US
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Helicopters safety drive
Assignee: Individual
•
Filing: 1975-06-26
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Granted: 1977-09-06
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Expires: 1995-06-26
Abstract
Abstract A helicopter is provided with an emergency drive system adapted to rotate the helicopter rotor in the event of motor failure, the drive system being powered by compressed gas stored in the helicopter. The system may comprise nozzles aimed at the plane of rotation of the rotor, or a turbine coupled to the rotor drive shaft.
Inventors
- 👤 Helmut Osberger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:53
CPC Classifications
B; B64; B64C; B64C27/00; B64C27/04; B64C27/12; B64C27/006
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
153 words
A helicopter comprising: at least one rotor; clutch means operatively declutchably coupled to said rotor for operatively disengaging with said rotor in an emergency; main motor means for directly driving said rotor via said clutch means; a storage of compressed gas adapted to contain a supply of compressed gas; at least one emergency drive means for directly rotating said rotor and for starting and being operated in event of emergency by means of said compressed gas from said storage of compressed gas; said emergency drive means comprising nozzles and supply ducts connected to said storage of compressed gas, said nozzles being directed from below the rotor angularly upwardly and radially outwardly toward the rotor so that said compressed gas is discharged from said nozzles to set the rotor into rotation when said emergency drive means is operated; and said clutch means for disengaging said main motor means from said rotor in said emergency.
Claim 2
Dependent Claim
153 words
A helicopter comprising: at least one rotor; clutch means operatively declutchably coupled to said rotor for operatively disengaging with said rotor in an emergency; main motor means for directly driving said rotor via said clutch means; a storage of compressed gas adapted to contain a supply of compressed gas; at least one emergency drive means for directly rotating said rotor and for starting and being operated in event of emergency by means of said compressed gas from said storage of compressed gas; said emergency drive means comprising nozzles and supply ducts connected to said storage of compressed gas, said nozzles being directed from below the rotor angularly upwardly and radially outwardly toward the rotor so that said compressed gas is discharged from said nozzles to set the rotor into rotation when said emergency drive means is operated; and said clutch means for disengaging said main motor means from said rotor in said emergency.
Claim 3
Dependent Claim
42 words
The helicopter according to claim 1, further comprising: means for constantly keeping said storage of compressed gas at a constant pressure and operatively connected to said main motor means for being operated thereby to maintain gas pressure constantly at a minimum value.
References Cited (Backward Citations)
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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) | 1980-09-05 | 1981-03-07 | 1981-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-09-05 | 1985-03-07 | 1985-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-09-05 | 1989-03-07 | 1989-09-06 | $7700.00 | Window Closed / Lapsed |