Continuously variable hydrostatic transmission including 1:1 rat

Details Continuously variable hydrostatic transmission including 1:1 rat Continuously variable hydrostatic transmission including 1:1 rat

1998-04-20

2000-05-16

Look, Edward K.

Power plants

Pressure fluid source and motor

Having a mechanical clutch or brake device in the power train

60436, F16D 3900

Patent

active

060620226

ABSTRACT:
In a continuously variable hydrostatic transmission including a hydraulic pump unit driven by an input shaft, a grounded hydraulic motor unit, and an intermediate, wedge-shaped swashplate for developing torque on an output shaft in response to pumped exchanges of hydraulic fluid between the pump and motor units through swashplate ports, a ratio controller is provided to vary transmission ratio by changing the swashplate angular orientation and to engage a lock-up clutch directly mechanically coupling the input shaft to the output shaft when a 1:1 transmission ratio is set.

REFERENCES:
patent: 4932208 (1990-06-01), Koyama et al.
patent: 5423183 (1995-06-01), Folsom
patent: 5486142 (1996-01-01), Folsom
patent: 5493862 (1996-02-01), Folsom
patent: 5524437 (1996-06-01), Larkin et al.
patent: 5535589 (1996-07-01), Folsom
patent: 5575152 (1996-11-01), Folsom
patent: 5678405 (1997-10-01), Folsom
patent: 5904043 (1999-05-01), Nagatomo

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