Hydraulic controller
专利汇可以提供Hydraulic controller专利检索，专利查询，专利分析的服务。并且PURPOSE: To control the oil pressure to be supplied to the machinery by providing a spool valve to be pressed by the oil pressure and a spring for pressing said valve in the oil path conducting between an oil pressure source and a hydraulic machine and changing the pressure of the spring through an electric signal.
CONSTITUTION: When the pressurized oil is supplied between the lands 42, 44 through an oil path 32, the spool valve 28 in a hydraulic control valve 16 is pushed to the left to stop the valve 28 at the position where the leftward pushing force due to the oil pressure and the rightward force of the spring 30 are balanced. Said fact is utilized to rotate a motor 58 thus to move a plunger 52 by means of an electric signal, while the force of the spring 30 is changed in accordance with the movement thus to change the oil pressure to a hydraulic machine 20 to the desired level.
COPYRIGHT: (C)1982,JPO&Japio，下面是Hydraulic controller专利的具体信息内容。
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