Servo-assisted steering device for vehicles, in particular for boats or the like
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United States of America Patent
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May 20, 2014
Grant Date -
May 31, 2012
app pub date -
May 27, 2011
filing date -
May 28, 2010
priority date (Note) -
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status (Latency Note)
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Abstract
A servo-assisted steering device for vehicles includes a manual control member that is connected to a pump or the like manually driving it when the control member is rotated. The pump is connected at its delivery and suction side to one of the two chambers of one or more steering actuators through hydraulic pipes, feeding a pressurized fluid alternately to one or the other of the two chambers depending on moving direction, in particular the rotation of the control member. Assist control means for the steering actuators include a hydraulic fluid tank and automatic pumping means, which are driven and connected to the hydraulic pipes when the steering wheel is operated and which, by increasing the amount of pumped fluid, increase the pressure exerted by the pump to reduce resistance when steering the control member. The number of revolutions of the motor driving the automatic pumping means may be adjusted.
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