Importance

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Abstract

A variable displacement hydraulic motor has a motor housing with a fluid inlet and a fluid outlet. A pair of hydraulic displacement units are mounted in the housing in a parallel arrangement and are operatively associated with a common output shaft. The common output shaft is supported for rotation within the housing and has a pair of spaced ends extending outside the housing, one of the ends driving a first axle shaft and the other end driving a second axle shaft. Each motor unit has a rotatable cylinder block with reciprocable pistons communicating with the fluid inlet and the fluid outlet and an angularly positionable swashplate for varying the stroke of the pistons. A minimum-maximum servo regulates the position of each swashplate independently to provide a wide range of output of the hydraulic motor.

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First Claim