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    • 66. 发明申请
    • HYDRAULIC PRESS TOOL
    • 液压工具
    • US20150308465A1
    • 2015-10-29
    • US14690522
    • 2015-04-20
    • Ridge Tool Company
    • Harald Krondorfer
    • F15B15/08F15B15/20
    • A01M1/103A01M1/02A01M1/04B25B7/126B25F5/005F15B15/08F15B15/18F15B15/20F15B15/202H01R43/0427
    • Hydraulic systems and tools having an actuator that actuates a pump and a control valve are described. The pump transports fluid into a chamber to advance a piston in the chamber. The control valve is biased open and regulates flow of hydraulic fluid from the chamber to a reservoir. The actuator is operable in a first state in which the control valve is open, allowing flow of fluid from the chamber to the reservoir, and the pump is not pumping. The actuator can be operated in a second state in which the control valve is closed, restricting flow of fluid from the chamber to the reservoir, and the pump is not pumping. The actuator can be operated in a third state in which the control valve is closed and the pump is pumping fluid from the reservoir into the chamber in order to advance the piston.
    • 描述了具有致动泵和控制阀的致动器的液压系统和工具。 泵将流体输送到腔室中以使腔室中的活塞前进。 控制阀被偏置打开,并且调节液压流体从腔室到容器的流动。 致动器可操作在控制阀打开的第一状态,允许流体从腔室流到储存器,并且泵不泵送。 致动器可以在其中关闭控制阀的第二状态下操作,限制流体从腔室流到储存器,并且泵不泵送。 致动器可以在第三状态下操作,其中控制阀关闭,并且泵将流体从储存器泵送到室中,以便推进活塞。