Planetary gear transmission systems or components – Nonplanetary variable speed or direction transmission... – Nonplanetary transmission is belt or chain gearing
Reexamination Certificate
2006-08-08
2006-08-08
Lewis, Tisha (Department: 3681)
Planetary gear transmission systems or components
Nonplanetary variable speed or direction transmission...
Nonplanetary transmission is belt or chain gearing
C475S196000
Reexamination Certificate
active
07086981
ABSTRACT:
An infinitely variable speed ratio planetary ball transmission comprising planetary members in rolling contact with moveable inner and outer races and a constant speed accessory drive system utilizing the transmission. The transmission is infinitely variable between ratios of approximately 0.3 and 1.0. A transmission input shaft is connected to a prime mover such as a vehicle engine crankshaft by a drive belt. The transmission comprises at least one output shaft that is coaxial with the input shaft. An output pulley is attached to the output shaft. A belt is engaged between the output pulley and various engine accessories. A second end of the transmission output shaft may be directly coupled to an engine accessory mounted on the transmission. An included control system senses a crankshaft speed. A processor analyses the crankshaft speed and accordingly adjusts the transmission ratio using a stepper motor connected to a worm drive to maintain a constant output speed regardless of crankshaft speed.
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970007 “Continuously Variable Accessory Drive System” Copyright 1997 Society of Automotive Engineers, Inc. by Shinji Yasuhara, Takao Tamagawa, and Yasuhiko Hasuda.
EAEC N. 91033 “Variable Accessory Drives —The Potential For Improving Fuel Consumption and Acceleration Performance” by A. Hedman —Chalmers University of Technology Gotborg (S).
9636439 “Continuously Variable Accessory Drive System (CVAD)” by Takao Tamagawa, Shinji Yasuhara, and Yasuhiko Hasuda of Koyo Seiko Co., Ltd.
CVT 2002 Congress, Munich, Oct. 7/8, 2002, VDI-Berichte 1709, “Milner CVT for High Torque Applications”, P.J. Milner B.Sc., Hinckley/GB.
Ali Imtiaz
Serkh Alexander
Castleman, Esq. C. H.
Lewis Tisha
Mahurin, Esq. J. L.
The Gates Corporation
Thurnau, Esq. J. A.
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