Hydrostatic transmission including a simplified ratio controller

Details Hydrostatic transmission including a simplified ratio controller Hydrostatic transmission including a simplified ratio controller

1994-11-21

1996-01-23

Buiz, Michael Powell

Endless belt power transmission systems or components

Control for variable input to output speed-ratio

60492, F16H 6100, F16D 3102

Patent

active

054861420

ABSTRACT:
A continuously variable hydrostatic transmission includes an input shaft connected to drive a hydraulic pump unit, a grounded hydraulic motor unit, and an output shaft. A wedge-shaped swashplate is pivotally mounted to the output shaft in driving connection to receive output torque resulting from the exchange of pressurized hydraulic fluid between the pump and motor units through specially configured ports in the swashplate. A hydraulically actuated ratio controller shifts the axial positions of spherical bearings mounting a pump cylinder block in the hydraulic pump unit and a motor cylinder block in the hydraulic motor unit to adjust the swashplate angle relative to the output shaft axis and thereby change transmission ratio.

REFERENCES:
patent: 2832198 (1958-04-01), Pichon
patent: 3204411 (1965-09-01), Stockton
patent: 4493189 (1985-01-01), Slater
patent: 4495768 (1985-01-01), Valavaara
patent: 5423183 (1995-06-01), Folsom

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