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1. (WO1991018211) CONTROL VALVE PROVIDED WITH PRESSURE COMPENSATED VALVE
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/018211 International Application No.: PCT/JP1991/000638
Publication Date: 28.11.1991 International Filing Date: 15.05.1991
IPC:
E02F 9/22 (2006.01) ,F15B 13/04 (2006.01)
E FIXED CONSTRUCTIONS
02
HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
F
DREDGING; SOIL-SHIFTING
9
Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/-E02F7/160
20
Drives; Control devices
22
Hydraulic or pneumatic drives
F MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
15
FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
B
SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
13
Details of servomotor systems
02
Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
04
for use with a single servomotor
Applicants:
KOMATSU LTD. [JP/JP]; 3-6, Akasaka 2-chome Minato-ku Tokyo 107, JP (AllExceptUS)
AKIYAMA, Teruo [JP/JP]; JP (UsOnly)
SHIRAI, Kiyoshi [JP/JP]; JP (UsOnly)
ISHIZAKI, Naoki [JP/JP]; JP (UsOnly)
YAMASHITA, Koji [JP/JP]; JP (UsOnly)
SHINOZAKI, Shinichi [JP/JP]; JP (UsOnly)
Inventors:
AKIYAMA, Teruo; JP
SHIRAI, Kiyoshi; JP
ISHIZAKI, Naoki; JP
YAMASHITA, Koji; JP
SHINOZAKI, Shinichi; JP
Agent:
SUGIURA, Toshiki; Taiko Bldg. 4F 4-21, Shinmachi 1-chome Nishi-ku, Osaka-shi Osaka 550, JP
Priority Data:
2/12296015.05.1990JP
Title (EN) CONTROL VALVE PROVIDED WITH PRESSURE COMPENSATED VALVE
(FR) SOUPAPE DE COMMANDE POURVUE D'UNE SOUPAPE DE COMPENSATION DE PRESSION
Abstract:
(EN) A control valve provided with a pressure compensated valve without the interior of a valve body being complicated. In the valve body, a load pressure transmitting path, a check valve and a restriction are formed in a spool constituting a control valve thereof, and an intermediate pressure between a pressure at the inlet and a pressure at the outlet of the pressure compensated valve adjacently provided in the valve body can be fed to a pressure receiving portion of the pressure compensated valve through an oil hole formed in the spool, so that the control valve provided with the pressure compensated valve, which is simple in construction and easy to manufacture, can be provided.
(FR) Est décrite une soupape de commande pourvue d'une soupape de compensation de pression sans que cela ne rende complexe l'intérieur du corps de soupape. Dans le corps de soupape, une trajectoire de transmission de pression de charge, un clapet de non-retour et une striction sont formées dans un boisseau constituant une soupape de commande, et une pression intermédiaire entre une pression à l'admission et une pression à la sortie de la soupape de compensation de pression disposée de manière adjacente dans le corps de soupape peut être introduite dans une partie prévue à cet effet de la soupape de compensation de pression, par un trou de passage d'huile ménagé dans le boisseau, de sorte que la soupape de commande pourvue de la soupape de compensation de pression peut être aisément réalisée grâce à sa conception simple.
Designated States: KR, US
European Patent Office (DE, FR, GB, IT)
Publication Language: Japanese (JA)
Filing Language: Japanese (JA)
Also published as:
EP0483374US5273069KR1019920702756