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US 4,046,335 AGranted
Helicopters safety drive
OwnerHelmut Osbergerinventor
Life of this patent
Estimating the term…
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.
Claims2
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.
5 more elements
Dependencies are inferred from the claim text.