Control mechanism for two hydraulic adjustment devices supplied via one, each, current branch by a high-pressure pump

Claim 1

In a control mechanism for two hydraulic adjustment devices including a pump (1) for supplying pressurized hydraulic fluid, a divider valve (3) connected with said pump, said divider valve having first and second flow lines, a first hydraulic adjustment device (10) connected with said first flow line (12), said first adjustment device comprising a steering mechanism for a motor vehicle, steering valve means (6) connected with said first flow line between said divider valve and said first adjustment device for controlling, the delivery of hydraulic fluid to said first adjustment device, a second hydraulic adjustment device (15) connected with said second flow line (13), an activation valve (14) connected with said second flow line between said divider valve and said second adjustment device, and a pilot flow line (4) connected between said first flow lines and a non-return return line (11) aid pilot flow line containing a measurement diaphragm (9) for restricting the flow of pressurized fluid in said pilot flow line, the improvement which comprises (a) said steering mechanism comprising a hydraulic steering unit having a mechanical connection between a manual steering wheel and a manual force device connected to means for manual steering of the wheels of a motor vehicle; a pilot valve (5) connected with said pilot line; and (c) a connecting member (7) for connecting said pilot valve with said steering valve means for shifting movement therewith in response to operation of the steering wheel, whereby when said steering valve means is in a neutral position, said pilot valve connects said first flow line with said non-return line, and when said steering valve means is shifted to a working position, said pilot valve is shifted to block said pilot line.