DEVICE FOR CONTROLLING THE OPERATION OF A VENTILATOR, WHICH CAN BE DRIVEN BY A HYDRAULIC MOTOR, OF A COOLING DEVICE
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United States of America Patent
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Issued Date -
Oct 29, 2015
app pub date -
Nov 9, 2013
filing date -
Dec 5, 2012
priority date (Note) -
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Abstract
Disclosed is a device for controlling the operation of a ventilator, which can be driven by a hydraulic motor (1), of a cooling device, in particular in a working appliance for agricultural use, wherein the hydraulic motor (1) can be supplied with pressure fluid by means of a hydraulic pump (3) via a valve arrangement (7) than can be set to a first valve position for operation of the hydraulic motor (1) in a first direction of rotation and to a second valve position for operation of the hydraulic motor (1) in a second direction of rotation, a control device (21) being present, by means of which the valve arrangement (7) can be set to an intermediate position which reduces the pressure supply to the hydraulic motor (1) during transitions between the first and second valve positions for a time period that allows the ventilator speed to be reduced.
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