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1. WO1996004431 - VALVE APPARATUS FOR PREVENTING FALL OF WORKING MACHINE

Publication Number WO/1996/004431
Publication Date 15.02.1996
International Application No. PCT/JP1995/001545
International Filing Date 03.08.1995
Chapter 2 Demand Filed 16.02.1996
IPC
E02F 9/22 2006.01
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL-SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/-E02F7/160
20Drives; Control devices
22Hydraulic or pneumatic drives
F15B 13/01 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
01Locking-valves or other detent devices
CPC
E02F 9/2221
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
20Drives; Control devices
22Hydraulic or pneumatic drives
2221Control of flow rate; Load sensing arrangements
E02F 9/226
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
20Drives; Control devices
22Hydraulic or pneumatic drives
226Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
E02F 9/2267
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
20Drives; Control devices
22Hydraulic or pneumatic drives
2264Arrangements or adaptations of elements for hydraulic drives
2267Valves or distributors
E02F 9/2271
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
20Drives; Control devices
22Hydraulic or pneumatic drives
2264Arrangements or adaptations of elements for hydraulic drives
2271Actuators and supports therefor and protection therefor
E02F 9/2285
EFIXED CONSTRUCTIONS
02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
FDREDGING; SOIL-SHIFTING
9Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
20Drives; Control devices
22Hydraulic or pneumatic drives
2278Hydraulic circuits
2285Pilot-operated systems
F15B 13/015
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
01Locking-valves or other detent ; i.e. load-holding; devices
015using an enclosed pilot flow valve
Applicants
  • KOMATSU LTD. [JP/JP]; 3-6, Akasaka 2-chome Minato-ku Tokyo 107, JP (AllExceptUS)
  • HORI, Shuji [JP/JP]; JP (UsOnly)
  • KARAKAMA, Tadao [JP/JP]; JP (UsOnly)
Inventors
  • HORI, Shuji; JP
  • KARAKAMA, Tadao; JP
Agents
  • YONEHARA, Masaaki ; Bansui Building 5-16, Toranomon 1-chome Minato-ku Tokyo 105, JP
Priority Data
6/18449205.08.1994JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) VALVE APPARATUS FOR PREVENTING FALL OF WORKING MACHINE
(FR) APPAREIL A SOUPAPES EMPECHANT LA CHUTE D'UN ENGIN DE TERRASSEMENT
Abstract
(EN)
A valve apparatus for preventing a fall of a working machine comprises a cylinder-side passage (20) communicating with a cylinder port (19) opened in a cylinder-side mounting surface (11), a valve body (10) having a directional control valve-side passage (18) communicating with a directional control valve port (17), a check valve (24) provided in the valve body (10) and preventing the entry of a pressure oil from the cylinder-side passage (20) into the directional control valve-side passage (18), a flow rate control valve (34) provided in the valve body (10), normally shutting off the directional control valve-side passage (18) and cylinder-side passage (20) from each other, and establishing communication between these passages on receiving an external signal, and a safety valve (44) provided in the valve body (10) and adapted to relieve a high pressure in the cylinder-side passage (20). The check valve (24), flow rate control valve (34) and safety valve (44) are provided in a common plane substantially parallel to the cylinder-side mounting surface (11).
(FR)
Un appareil à soupapes destiné à empêcher la chute d'un engin de terrassement comporte un passage côté vérin (20) communiquant avec un orifice à vérin (19) s'ouvrant sur une surface de montage côté vérin (11), un corps à soupapes (10) présentant un passage côté distributeur (18) communiquant avec un orifice à distributeur (17), une soupape de non-retour (24) prévue dans le corps à soupapes (10) et empêchant d'huile sous pression dans le passage côté vérin (20) d'entrer dans le passage côté distributeur (18), une soupape de régulation de débit (34) prévue dans le corps à soupapes fermant normalement le passage côté distributeur (18) et le passage côté vérin (20) indépendamment l'un de l'autre, et établissant une communication entre ces passages dès réception d'un signal externe, ainsi qu'une soupape de sûreté (44) prévue dans le corps à soupapes (10) et conçue pour délester le passage côté vérin (20) en cas de pression élevée. La soupape de non-retour (24), la soupape de régulation de débit (34) et la soupape de sûreté (44) sont placées dans un plan commun sensiblement parallèle à la surface de montage (11) côté vérin.
Also published as
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