Means for regulating two trawl winches
AssigneeKarmoy Mekaniske Verksted A/S
InventorPer H. Hystad
Life of this patent
Estimating the term…
Abstract
Control means for two trawl winches having separate motors and supply systems, each motor having a shunt line which is connected to the shunt line of the other motor by a pressure operated value for opening of either one of the shunt lines.
Claims4
An apparatus for driving two trawl winches, comprising first and second hydraulic motors for driving connection to the winches respectively and first and second supply systems for delivering hydraulic fluid to the first and second motors respectively and for receiving hydraulic fluid from the first and second motors respectively, each motor having two connections for delivering hydraulic fluid to the motor and receiving hydraulic fluid from the motor, and a shunt line connecting the two connections together, and the apparatus further comprising a pressure-regulated valve having a common valve body for controlling flow of hydraulic fluid in the two shunt lines, the valve body having a first position in which the shunt line of the first motor is open and the shunt line of the second motor is closed and adopting this position only when the pressure in the first supply system exceeds the pressure in the second supply system, and a second position in which the shunt line of the second motor is open and the shunt line of the first motor is closed and adopting this position only when the pressure in the second supply system exceeds the pressure in the first supply system.
Dependencies are inferred from the claim text.