Gearboxes are devices that alter the torque and speed between a driving device like a motor and a load. The most advanced gearboxes are the CVTs (Continuously Variable Transmission) that offer theoretically infinite gear ratios. Therefore, transmission is close to the ideal needed for a certain application. The CVT was first introduced in a design presented in 1877 and was since developed mainly by European and Japanese companies. The principle behind all CVTs was the friction between the components of the gearbox. In 2012, a Greek engineer designed the first linear CVT gearbox based in a gyroscopic mechanism and hydraulic transmission, without the direct friction of the components. Actually, the system is not a gearbox as it has no gears but rather performs as a gearbox of infinite transfer ratios.
The design is purely linear. To achieve this, the system is mechanically self-adjusted by using mechanical principles of kinematics and hydraulic means (oil) as a result of the mechanical interaction between centrifugal powers and the load (torque) at the output of the hydraulic motor that exist in the system.
The Greek engineer holds two patents for the proposed gearbox. The design examined by a renowned engineering department of the oldest university in Athens. The university examined the system theoretically and simulated the operation with positive results, available to interested parties. A thesis was published for this design. Analytical simulations showed that the gearbox could be operational from low RPM (Routes Per Minute), starting from few hundreds up to more than 10.000 RPM. From the same study, the system is expected to be able to transfer power of even more than 5 MW.
The Greek inventor is looking for industrial companies interested in a license agreement. The company should have interest in prototyping, testing and producing the system. Alternatively, the Greek inventor is open to investors with interest to fund the development of the system.