Variable ratio mini bike drive
Abstract
Abstract A VARIABLE-RATIO BELT DRIVE FOR MINI BIKES AND THE LIKE, RESPONSIVE TO BOTH ENGINE SPEED AND DRIVE TORQUE. A NORMALLY-OPEN, VARIABLE-WIDTH DRIVER PULLEY RESPONSIVE TO ENGINE SPEED IS CONNECTED BY A V-BELT TO A NORMALLYCLOSED VARIABLE-WIDTH DRIVEN PULLEY WHICH INITIALLY GIVES A HIGH-REDUCTION DRIVE RATIO, E.G., 3:1. ONE FLANGE OF THE DRIVEN PULLEY IS MOVABLE AND URGED TOWARD THE FIXED FLANGE BY LOW-ANGLE CAMS AND A TORSION SPRING. A MOVABLE FLANGE OF THE DRIVER PULLEY IS URGED TOWARD THE FIXED FLANGE THEREOF BY WEDGE WEIGHTS ACTING BETWEEN THE MOVABLE FLANGE AND A REACTION CONE, SO THAT INCREASED SPEED CLOSES THE DRIVER PULLEY AND EXERTS BELT TENSION TO OPEN THE DRIVEN PULLEY, WHICH LOWERS THE DRIVE RATIO. HIGH TORQUE CAUSES THE CAMS TO CLOSE THE DRIVEN PULLEY AND OVERCOME THE SPEED-RESPONSE CONTROL, HENCE TO INCREASE THE DRIVE RATIO TO HANDLE THE INCREASED TORQUE AT HIGH ENGINE SPEED.
Inventors
- 👤 Stephen J Hoff
Bibliographic Details
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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) | 1974-12-06 | 1975-06-07 | 1975-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-06 | 1979-06-07 | 1979-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-06 | 1983-06-07 | 1983-12-07 | $7700.00 | Window Closed / Lapsed |