Invention Grant
US4864891A Power transmission system 失效
动力传动系统

Power transmission system
Abstract:
An adjustable speed transmission according to the present invention comprises a variable speed pulley drive system and a multiple speed gear drive system. The pulley system and gear system are combined with a reversible gear system to provide a speed transmission system which is variable over a wide range of speeds while utilizing a conventional belt type speed pulley system.
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