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1. WO1996004482 - PRESSURE COMPENSATING VALVE

Publication Number WO/1996/004482
Publication Date 15.02.1996
International Application No. PCT/JP1995/001546
International Filing Date 03.08.1995
Chapter 2 Demand Filed 16.02.1996
IPC
F15B 13/04 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
04for use with a single servomotor
G05D 16/10 2006.01
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
16Control of fluid pressure
04without auxiliary power
10the sensing element being a piston or plunger
CPC
F15B 13/0417
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
04for use with a single servomotor
0416with means or adapted for load sensing
0417Load sensing elements; Internal fluid connections therefor; Anti-saturation or pressure-compensation valves
G05D 16/10
GPHYSICS
05CONTROLLING; REGULATING
DSYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
16Control of fluid pressure
04without auxiliary power
10the sensing element being a piston or plunger
Y10S 137/906
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
STECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
137Fluid handling
906Valves biased by fluid "springs"
Y10T 137/7764
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
7722Line condition change responsive valves
7758Pilot or servo controlled
7762Fluid pressure type
7764Choked or throttled pressure type
Y10T 137/7766
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
7722Line condition change responsive valves
7758Pilot or servo controlled
7762Fluid pressure type
7764Choked or throttled pressure type
7766Choked passage through main valve head
Y10T 137/777
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
137Fluid handling
7722Line condition change responsive valves
7758Pilot or servo controlled
7762Fluid pressure type
7769Single acting fluid servo
777Spring biased
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
6/18462205.08.1994JP
6/30344007.12.1994JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) PRESSURE COMPENSATING VALVE
(FR) SOUPAPE DE COMPENSATION DE PRESSION
Abstract
(EN)
The invention relates to a pressure compensating valve which comprises a valve for opening and closing an inlet port and an outlet port, a pressure receiving chamber, a piston driven by a negative pressure in the pressure receiving chamber to move the valve in a closing direction, an intermediate pressure receiving chamber communicating with the inlet port through a first fine hole to have its internal pressure push the valve in the closing direction, and a variable set pressure type relief valve for causing a pressure oil in the intermediate pressure receiving chamber to be relieved to the outlet port through a second fine hole.
(FR)
L'invention concerne une soupape de compensation de pression qui comporte une soupape conçue pour ouvrir et fermer une ouverture d'admission et une ouverture de sortie, une chambre de réception de pression renfermant un piston mû par une pression négative pour déplacer la soupape dans le sens de fermeture, une chambre de réception de pression intermédiaire communiquant avec l'ouverture d'admission par un premier petit orifice pour pousser la soupape dans le sens de fermeture à l'aide de sa pression interne, et une soupape de surpression à fonctionnement variable entraînant l'évacuation d'huile sous pression dans la chambre de réception de pression intermédiaire par un second petit orifice.
Also published as
Latest bibliographic data on file with the International Bureau