Hydraulic power-assisted actuating arrangements
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United States of America Patent
Stats
-
Feb 5, 1980
Grant Date -
N/A
app pub date -
Jan 9, 1978
filing date -
Feb 24, 1977
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
An hydro-mechanical torque amplifier such as a power steering unit for road vehicles. In the prior art, torque amplifying hydraulic pressure was applied to the linear part of a ball-screw geared to the output shaft such that all power went through meshing gear teeth, necessitating robust construction thereof. In the present invention, torque amplifying hydraulic pressure is applied to a vane motor on the output shaft such that hydraulic power does not pass through gear teeth, enabling a lighter and less costly construction.
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