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1. WO1996004481 - DIRECTIONAL CONTROL VALVE

Publication Number WO/1996/004481
Publication Date 15.02.1996
International Application No. PCT/JP1995/001547
International Filing Date 03.08.1995
Chapter 2 Demand Filed 16.02.1996
IPC
F15B 11/024 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action
02Systems essentially incorporating special features for controlling the speed or the actuating force or speed of an output member
024by means of differential connection of the servomotor lines, e.g. regenerative circuits
F15B 11/12 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action
08with only one servomotor
12providing distinct intermediate positions; with step-by-step action
F15B 13/02 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
13Details of servomotor systems
02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
CPC
F15B 11/024
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action; ; Circuits therefor
02Systems essentially incorporating special features for controlling the speed or actuating force of an output member
024by means of differential connection of the servomotor lines, e.g. regenerative circuits
F15B 11/123
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
11Servomotor systems without provision for follow-up action; ; Circuits therefor
08with only one servomotor
12providing distinct intermediate positions; with step-by-step action
121providing distinct intermediate positions
123by means of actuators with fluid-operated stops
F15B 13/021
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
13Details of servomotor systems
02Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
021Valves for interconnecting the fluid chambers of an actuator
F15B 2211/30525
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
2211Circuits for servomotor systems
30Directional control
305characterised by the type of valves
30525Directional control valves, e.g. 4/3-directional control valve
F15B 2211/3133
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
2211Circuits for servomotor systems
30Directional control
31characterised by the positions of the valve element
3122Special positions other than the pump port being connected to working ports or the working ports being connected to the return line
3133Regenerative position connecting the working ports or connecting the working ports to the pump, e.g. for high-speed approach stroke
F15B 2211/35
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
BSYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
2211Circuits for servomotor systems
30Directional control
35Directional control combined with flow control
Applicants
  • KOMATSU LTD. [JP/JP]; 3-6, Akasaka 2-chome Minato-ku Tokyo 107, JP (AllExceptUS)
  • ISHIZAKI, Naoki [JP/JP]; JP (UsOnly)
  • TAKANO, Toshiro [JP/JP]; JP (UsOnly)
Inventors
  • ISHIZAKI, Naoki; JP
  • TAKANO, Toshiro; JP
Agents
  • YONEHARA, Masaaki ; Bansui Building 5-16, Toranomon 1-chome Minato-ku Tokyo 105, JP
Priority Data
6/18453405.08.1994JP
6/30496708.12.1994JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) DIRECTIONAL CONTROL VALVE
(FR) DISTRIBUTEUR
Abstract
(EN)
The invention relates to a directional control valve which comprises a first actuator port connected to a lifting side chamber of a cylinder of a working machine, a second actuator port connected to a lowering side chamber of the cylinder of the working machine, a regeneration passage for alloying the second actuator port communicate with a regeneration port through a check valve, and a main spool adapted to move in one direction to thereby supply a pressure oil to the second actuator port and to allow the first actuator port to communicate with a tank port and the regeneration port. The directional control valve is characterized in the provision of a switching means for switching a maximum distance of movement of the main spool in one direction in a plurality of stages.
(FR)
L'invention concerne un distributeur comprenant une première ouverture d'actionnement reliée à une chambre latérale de levage d'un vérin d'un engin de terrassement, une seconde ouverture d'actionnement reliée à une chambre latérale d'abaissement du vérin dudit engin, un passage de régénération permettant à la seconde ouverture d'actionnement de communiquer avec une ouverture de régénération par l'intermédiaire d'une soupape de non-retour, et une bague principale conçue pour se déplacer dans un sens et envoyer de l'huile sous pression à une seconde ouverture d'actionnement et permettre à la première ouverture d'actionnement de communiquer avec une ouverture de réservoir et l'ouverture de régénération. Ledit distributeur se caractérise en ce qu'il est doté de moyens de commutation permettant de donner à la bague principale une distance de déplacement maximum dans un sens, en plusieurs phases.
Also published as
Latest bibliographic data on file with the International Bureau