公开(公告)号：US5771636A

公开(公告)日：1998-06-30

申请号：US632350

申请日：1996-04-10

申请人： Calvin Franklin Mathis

发明人： Calvin Franklin Mathis

IPC分类号： E05F15/04

CPC分类号： E05F15/53 ,  E05Y2900/40

摘要： A swing gate providing free access when the electrical power that drives a hydraulic system to open and close the gate is off is described. The hydraulic system comprises a reversible electrical motor to drive a hydraulic pump which in turn provides hydraulic fluid under pressure to a double acting hydraulic actuator. An electrical actuated solenoid valve is located in a bypass line of the hydraulic system and the solenoid valve is designed to open when the electrical power is off which allows the hydraulic fluid to drain from one side of the actuator into a reservoir. Since one side of the double acting actuator contains no fluid under pressure, the swing gate can be opened by hand.

摘要翻译： 描述当驱动液压系统打开和关闭闸门的电力关闭时提供自由通道的摆门。 液压系统包括可逆电动机以驱动液压泵，液压泵又将压力下的液压流体提供给双作用液压致动器。 电动电磁阀位于液压系统的旁路管路中，并且电磁阀被设计成当电力关闭时打开，这允许液压流体从致动器的一侧排出到储存器中。 由于双作用执行器的一侧在压力下不含流体，所以可以手动打开摆门。