Fluid pressure operated torque amplifier and a vehicular power s

Details Fluid pressure operated torque amplifier and a vehicular power s Fluid pressure operated torque amplifier and a vehicular power s

1998-03-20

2000-02-29

Lopez, F. Daniel

Motors: expansible chamber type

Working member position feedback to motive fluid control

Follower type

F15B 910

Patent

active

060295600

ABSTRACT:
A compact and inexpensive fluid pressure operated torque amplifier and a power steering system incorporating such torque amplifier to eliminate the need for a separate return fluid conduit. The power steering system (10) includes a fluid pressure operated torque amplifier (12), a reduction gear unit (16) disposed within a cavity (53) of a transmission casing (14), and a steering linkage (20) for wheels. The torque amplifier includes a control valve assembly (24) disposed in a housing (22), a torque amplifier unit (32), a high torque drive shaft (58) and an output shaft (54). The output shaft of the torque amplifier serves as an input member of the reduction gear unit. The torque amplifier also includes a pressurized fluid inlet (78) provided in the housing and a return fluid outlet (61) provided in the output shaft (54), both the inlet and outlet being in communication with the cavity of the transmission casing.

REFERENCES:
patent: 2138050 (1938-11-01), Vickers
patent: 2821171 (1958-01-01), Charlson
patent: 2899937 (1959-08-01), Nuebling
patent: 3452543 (1969-07-01), Goff et al.
patent: 3481147 (1969-12-01), Goff
patent: 4381905 (1983-05-01), Peterson
patent: 4503753 (1985-03-01), Bacardit
patent: 4771809 (1988-09-01), Anguera
patent: 4936094 (1990-06-01), Novacek
patent: 5042250 (1991-08-01), Carlson et al.

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