公开(公告)号：US4480527A

公开(公告)日：1984-11-06

申请号：US349554

申请日：1982-02-17

Applicant: Kurt R. Lonnemo

Inventor： Kurt R. Lonnemo

IPC: F15B13/02 ,  F15B11/08 ,  F15B13/042

CPC classification number: F15B13/02 ,  Y10T137/87201

Abstract: A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions and a variable displacement pump with loading sensing control for supplying fluid to said actuator. A pair of meter-in valves are provided to which the fluid from the pump is supplied and a pilot controller alternately supplies fluid at pilot pressure to a meter-in valve for controlling the displacement of movement of the meter-in valve and the direction and velocity of the actuator. Alternately pilot pressure from the pilot controller is applied simultaneously to both of the meter-in valves in conjunction with the venting of one of two load drop check valves to provide a regenerative mode.A line extends from the meter-in valve to its respective opening of the actuator and a meter-out valve is associated with each line of the actuator for controlling the flow out of the actuator when that line to the actuator does not have pressure fluid from the pump applied thereto. Each meter-out valve is pilot operated by the pilot pressure from the controller.In a modified form, utilizing a single actuator, the hydraulic control system includes a single meter-in valve associated with one opening of the actuator.

Abstract translation: 一种液压控制系统，包括液压致动器，该液压致动器具有适于交替地用作入口和出口的相对开口，用于沿相反方向移动致动器的元件;以及可变排量泵，其具有用于向所述致动器供应流体的负载感测控制。 提供了一对计量阀，来自泵的流体被供应到该导管控制器，并且先导控制器交替地将先导压力的流体供应到计量阀，以控制流入阀的运动位移， 执行器的速度。 来自先导控制器的替代先导压力同时施加到两个进气阀，同时与两个负载降压止回阀之一的排气一起提供再生模式。 一条管线从进口阀延伸到致动器的相应开口，并且一个排出阀与致动器的每条管线相关联，用于控制致动器的流出，当执行器的管路不具有压力流体时 泵施加到其上。 每个出口阀由先导控制器的先导压力先导操作。 在改进形式中，利用单个致动器，液压控制系统包括与致动器的一个开口相关联的单个计量阀。

公开(公告)号：US4811650A

公开(公告)日：1989-03-14

申请号：US90660

申请日：1987-08-28

Applicant: Kurt R. Lonnemo

Inventor： Kurt R. Lonnemo

IPC: F15B11/08 ,  F15B13/042

CPC classification number: F15B13/0422

Abstract: A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions, a pump system for supplying fluid, and a directional valve provided to which the fluid from the pump is supplied for controlling flow to and from the actuator. A pair of lines extends from the directional valve to the respective openings of the actuator. A controller alternately supplies a first fluid pilot pressure to pressure reducing valves associated with the directional valve for reducing the pressure from the pump system or any other source and supplying a second reduced pilot pressure to the directional valve for controlling the flow to and from the actuator. Preferably, the directional valve comprises a meter-in valve and a meter-out valve associated with each line to the actuator for controlling flow out of the actuator. Each meter-in valve and meter-out valve is operated by the second pilot pressure from the pressure reducing valve.

公开(公告)号：US4353289A

公开(公告)日：1982-10-12

申请号：US154473

申请日：1980-05-29

Applicant: Kurt R. Lonnemo

Inventor： Kurt R. Lonnemo

IPC: F16H43/00 ,  F15B11/02 ,  F15B13/02 ,  F15B11/04

CPC classification number: F15B13/02

Abstract: A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions, a pump for supplying fluid to said actuator, pilot operated meter-in valve means to which the fluid from the pump is supplied for controlling the direction of movement of the actuator, pilot operated meter-out valve means associated with each opening of the actuator for controlling the flow out of said actuator,and means for sensing a predetermined drop in a line supplying fluid to one opening of the actuator caused by a runaway load in one direction and operating the meter-out valve means to interrupt flow out of the other opening of the actuator.

Abstract translation: 一种液压控制系统，包括具有相对的开口的液压致动器，所述液压致动器具有适于交替地用作入口和出口，用于沿相反方向移动致动器的元件，用于向所述致动器供应流体的泵，先导操作的计量阀装置， 来自泵的泵被提供用于控制致动器的运动方向，与用于控制流出所述致动器的致动器的每个开口相关联的先导操作的排出阀装置以及用于感测供应流体的管线中的预定液滴的装置 由一个方向上的失控负载引起的致动器的一个开口，并且操作排出阀装置以中断从致动器的另一个开口流出。

公开(公告)号：US5170692A

公开(公告)日：1992-12-15

申请号：US787260

申请日：1991-11-04

Applicant: Kurt R. Lonnemo

Inventor： Kurt R. Lonnemo

IPC: E02F9/22 ,  F15B11/00 ,  F15B11/05 ,  F15B13/04

CPC classification number: F15B13/0405

Abstract: A hydraulic control system for controlling a hydraulic actuator comprising a pump for supplying fluid to the actuator and a directional valve for controlling the flow of fluid to the actuator. The directional valve includes a poppet piston that provides a variable orifice. The position of the poppet piston is controlled by a pilot flow controlled by a pilot valve which may be controlled by a solenoid controller. The flow out of the pilot valve is connected to the outlet of the directional valve. A pressure compensator is provided between the inlet to the directional valve and the pilot valve and maintains the pilot flow to the pilot valve constant. The pressure of fluid being applied to the actuator by the directional valve is also sensed and caused to produce a force opposing the opening force applied to the pilot valve to result in a smooth and accurate control of the load.

公开(公告)号：US5088384A

公开(公告)日：1992-02-18

申请号：US400670

申请日：1989-08-30

Applicant: Kurt R. Lonnemo

Inventor： Kurt R. Lonnemo

IPC: E02F9/22 ,  F15B11/00 ,  F15B13/02

CPC classification number: F15B13/02

Abstract: A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving an element of the actuator in opposite directions, a pump for supplying fluid to the actuator. A meter-in valve individual to each opening is provided to which fluid from the pump is supplied and a pair of lines extending from the respective meter-in valves to the respective openings of the actuator. A controller alternately supplies pressure to the respective meter-in valves for controlling the direction of movement of the load. A second pair of lines extends from the first pair of lines to tank and a variable pressure relief valve is positioned in each line of the second pair of lines. When the controller is moved to actuate one of the meter-in valves for supplying fluid to one of the openings of the actuator, the controller also actuates the variable relief valve associated with the line of the first pair of lines extending from the other of the openings of actuator to control the flow out of the other opening. The controller thus simultaneously controls the fluid flow and the pressure to the actuator and the fluid pressure from the actuator, thereby simultaneously controlling the driving and braking functions of the system.

公开(公告)号：US5272959A

公开(公告)日：1993-12-28

申请号：US938491

申请日：1992-08-31

Applicant: Kurt R. Lonnemo

Inventor： Kurt R. Lonnemo

IPC: F15B13/02 ,  F15B11/08

CPC classification number: F15B13/02 ,  Y10T137/87201

Abstract: A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions, a pump for supplying fluid to said actuator, a directional valve comprising pilot operated meter-in valves to which the fluid from the pump is supplied through first lines for controlling the direction of movement of the actuator, and a pilot operated meter-out valve associated with each opening of the actuator for controlling the flow out of said actuator. The pressure of fluid being supplied to the actuator by the meter-in valve is sensed and supplied to a line extending from the output of the meter-in valve. A valve is provided in this line to provide a force selectively on the meter-in valve opposing the movement of the meter-in valve by the pilot pressure. The valve may comprise either a modulating valve or a shut-off valve.

Abstract translation: 一种液压控制系统，包括具有相对的开口的液压致动器，所述液压致动器具有适于交替地用作入口和出口，用于沿相反方向移动致动器的元件，用于向所述致动器供应流体的泵，方向阀，其包括先导操作的计量阀 来自泵的流体通过用于控制致动器的运动方向的第一管线供应，以及与致动器的每个开口相关联的先导操作的排出阀，用于控制流出所述致动器的流量。 通过计量阀供给到致动器的流体的压力被感测并提供给从计量阀的输出延伸的管线。 在该管线中设有一个阀门，以便在计量阀上选择性地提供一个力，使其与导向阀压力相反。 阀可以包括调节阀或截止阀。

公开(公告)号：US4753157A

公开(公告)日：1988-06-28

申请号：US2857

申请日：1987-01-13

Applicant: Kurt R. Lonnemo ,  Nalin J. Shah

Inventor： Kurt R. Lonnemo ,  Nalin J. Shah

IPC: F15B11/05 ,  F15B11/04 ,  F15B11/08 ,  F15B13/02

CPC classification number: F15B13/02 ,  Y10T137/87201

Abstract: A hydraulic control system comprising a hydraulic actuator having opposed openings adapted to alternately function as inlets and outlets for moving the element of the actuator in opposite directions and a variable displacement pump with loading sensing control for supplying fluid to said actuator. A pilot operated spool type meter-in valve is provided to which the fluid from the pump is supplied and a pilot controller alternately supplies fluid at pilot pressure to the meter-in valve for controlling the direction and displacement of movement of the meter-in valve and the direction and velocity of the actuator. A pair of lines extends from the meter-in valve to the respective openings of the actuator and a pilot operated meter-out valve is associated with each line of the actuator for controlling the flow out of the actuator when that line to the actuator does not have pressure fluid from the pump applied thereto. Pressure of fluid in the line to the actuator, which does not have pressure fluid from the pump, is applied to the meter-in valve to apply a centering force which aids the pressure compensating flow forces to keep the flow constant.

Abstract translation: 一种液压控制系统，包括液压致动器，该液压致动器具有适于交替地用作入口和出口的相对开口，用于沿相反方向移动致动器的元件;以及可变排量泵，其具有用于向所述致动器供应流体的负载感测控制。 提供了一个先导操作的阀芯式计量阀，来自泵的流体被供给到该控制阀，并且先导控制器交替地将先导压力的流体供给到计量阀，以控制流量计的阀门的运动方向和位移 以及执行器的方向和速度。 一对线从计量阀延伸到致动器的相应开口，并且先导操作的排出阀与致动器的每个管线相关联，用于当致动器的线不到达时控制致动器的流出 从其上施加来自泵的压力流体。 在没有来自泵的压力流体的致动器的管线中的流体的压力被施加到计量阀，以施加有助于压力补偿流动力保持流量恒定的定心力。