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Hitachi Construction Machinery Co Ltd
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Hitachi Construction Machinery Co Ltd
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Publication date
Application filed by Hitachi Construction Machinery Co LtdfiledCriticalHitachi Construction Machinery Co Ltd
Priority to JP15550576ApriorityCriticalpatent/JPS5379174A/en
Publication of JPS5379174ApublicationCriticalpatent/JPS5379174A/en
PURPOSE: To provide a hydraulic drive device in which a quantitative hydraulic pump and a hydraulic motor are combined with each other and a range of four speeds may be provided automatically in accordance with a degree of load.