公开(公告)号：US3628567A

公开(公告)日：1971-12-21

申请号：US3628567D

申请日：1970-06-15

Applicant: ITT

Inventor： BENDER ALFRED ,  HORNIG HORST A

IPC: F15B13/04 ,  F16K11/07

CPC classification number: F15B13/0402 ,  Y10T137/86493 ,  Y10T137/87185 ,  Y10T137/87241

Abstract: A two-stage hydraulic valve system for controlling a doubleacting load the system having a three-position first stage valve for supplying pressure medium to pressure chambers on either end of a piston valve slide in a power control valve having twin lift valves for connecting the pressure source to the double-acting load. The lift valves, which are in the ends of the piston valve cylinder connect the load to the pressure chambers when the valves are opened, either by the movement of the piston valve slide against the lift valve, or by the increased pressure in the pressure chamber when the valve slide is at one end of its stroke and the pump pressure is applied to the pressure chamber at the other end of the valve slide. In the neutral position of the power valve there is free circulation of pressure medium from the source to the reservoir through a pressurizing valve. This circulation is cut off when the valve is actuated and the full pump pressure applied to one of the pressure chambers by means of valving passages and ports in the cylinder and slide.

公开(公告)号：US3678954A

公开(公告)日：1972-07-25

申请号：US3678954D

申请日：1970-09-09

Applicant: ITT

Inventor： OSTWALD FRITZ ,  BENDER ALFRED ,  HOFHEIM GERHARD

IPC: F15B13/04 ,  F16K31/12 ,  F16K31/52 ,  G05G5/04 ,  F15B15/06

CPC classification number: F16K31/52 ,  F15B13/0402 ,  F16K31/12 ,  G05G5/04 ,  Y10T137/2554 ,  Y10T137/2567 ,  Y10T137/2698 ,  Y10T137/87088

Abstract: A hydraulic control valve assembly having a valve slide and positioning device for successively positioning the valve against spaced abutments by means of an actuator piston.

Abstract translation: 一种具有阀滑动和定位装置的液压控制阀组件，用于通过致动器活塞将阀连续地定位在间隔开的邻接处。