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US 4,147,075 AGranted
Combined gearbox with stepless variable speed ratio
AssigneeTurcianske Strojarne
InventorsStefan Rasman, Pavol Hegedus, Pavol Habarda
Life of this patent
Estimating the term…
Abstract
A stepless variable speed gearbox employing a parallel combination of a hydrodynamic drive and a variable speed drive, with a coupling arrangement including an overrunning or disconnecting clutch to disconnect the hydrodynamic drive when the variable speed drive comes up to a given speed.
Claims3
A combination gear box having a stepless variable speed ratio comprising:
- an input driving member;
- a first gearbox comprising a variable-speed conversion driving unit having input and output shafts and exhibiting a controlled variation speed ratio between said shafts;
- a second gearbox comprising a hydrodynamic drive and having input and output shafts and containing a hydrodynamic torque converter;
- means connecting said input driving member to both of said input shafts;
- a disconnecting clutch coupled between said output shafts;
- an output driven member;
- and
- means for connecting the output driven member to both said output shafts that are coupled via said disconnecting clutch.
5 more elements
A combination gearbox having a stepless variable speed ratio, comprising:
- an input driving member;
- a first gearbox comprising a variable-speed conversion driving unit having input and output shafts and exhibiting a torque multiplication factor between said shafts which increases with increasing speed in a predetermined range of speeds;
- a second gearbox comprising a hydrodynamic drive and having input and output shafts with a torque multiplication factor between said shafts which decreases with increasing speed in said predetermined range of speeds;
- means connecting said driving member to both of said input shafts;
- an overrunning clutch coupled between said output shafts;
- a first output gear connected to the output shaft of said first gearbox;
- and
- a second output gear connected to said first output gear, said second output gear being coupled to the output shaft of said second gearbox through said overrunning clutch.
5 more elements
Dependencies are inferred from the claim text.