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1. WO1990002283 - POPPET VALVE DEVICE

Publication Number WO/1990/002283
Publication Date 08.03.1990
International Application No. PCT/JP1989/000867
International Filing Date 24.08.1989
IPC
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 13/02
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
Y10T 137/87201
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
8593Systems
87169Supply and exhaust
87193Pilot-actuated
87201Common to plural valve motor chambers
Y10T 137/87893
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
8593Systems
877With flow control means for branched passages
87893With fluid actuator
Applicants
  • KABUSHIKI KAISHA KOMATSU SEISAKUSHO [JP]/[JP] (AllExceptUS)
  • KARAKAMA, Tadao [JP]/[JP] (UsOnly)
  • NUNOTANI, Sadao [JP]/[JP] (UsOnly)
  • ISHIZAKI, Naoki [JP]/[JP] (UsOnly)
  • TAKANO, Toshiro [JP]/[JP] (UsOnly)
Inventors
  • KARAKAMA, Tadao
  • NUNOTANI, Sadao
  • ISHIZAKI, Naoki
  • TAKANO, Toshiro
Agents
  • YONEHARA, Masaaki
Priority Data
63/20845024.08.1988JP
63/21527931.08.1988JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) POPPET VALVE DEVICE
(FR) DISPOSITIF A SOUPAPES SOULEVANTES
Abstract
(EN)
This invention relates to a poppet valve device which switches and operates sequentially a plurality of poppet valves by the change-over operation of a pilot valve by an electromagnetic solenoid, for example, operating upon receiving an external input signal. This poppet valve device includes first and second poppet valves (A, B) each constructed in such a manner that a poppet to permit communicating or cutting off of an inlet port (30) with or from an outlet port (31) is moved in a direction of the communicating position by a pressure on the inlet port side acting on its pressure receiving portion (32a) and in a direction of the cut-off position by the pressure acting on its back pressure chamber (38a, 38b), and a pilot valve (C) which connects the back pressure chamber of each poppet valve to a tank (2) and has a variable throttle portion controlled by an external input signal in such a manner as to make the pressures of the respective back pressure chambers different from each other when the poppet of each poppet valve is moved to the position for allowing each inlet port to communicate with each outlet port.
(FR)
Dispositif à soupapes soulevantes servant à commuter et actionner de manière séquentielle un ensemble de soupapes soulevantes par la commutation d'une soupape pilote à l'aide, par exemple, d'un solénoïde électromagnétique déclenché par la réception d'un signal d'entrée venant de l'extérieur. Ledit dispositif à soupapes soulevantes comprend une première et une deuxième soupape soulevante (A, B) construites de sorte qu'une soupape soulevante, permettant la mise en communication d'un orifice d'admission (30) avec un orifice de sortie (31) ou l'interruption de cette communication, se déplace vers la position de mise en communication sous l'effet d'une pression du côté de l'orifice d'entrée agissant sur la partie réceptrice de pression (32a) de ladite soupape, ou se déplace vers la position d'interruption de communication sous l'effet d'une pression agissant sur sa chambre de contre-pression (38a, 38b). Le dispositif à soupapes soulevantes comprend également une soupape pilote (C) qui relie la chambre de contre-pression de chaque soupape soulevante à un réservoir (2) et qui présente une partie d'étranglement variable commandée par un signal d'entrée provenant de l'extérieur, de manière à rendre différentes les unes des autres les pressions dans les chambres de contre-pression respectives lorsque la tige de chaque soupape soulevante se déplace vers la position permettant à chaque orifice d'admission de communiquer avec chaque orifice de sortie.
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