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1. WO2006118841 - HYDRAULIC SYSTEM HAVING A PRESSURE COMPENSATOR

Publication Number WO/2006/118841
Publication Date 09.11.2006
International Application No. PCT/US2006/015360
International Filing Date 25.04.2006
IPC
F15B 11/00 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
F15B 11/05 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
04for controlling the speed
05specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
F15B 11/042 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
04for controlling the speed
042by means in the feed line
CPC
F15B 11/006
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
006Hydraulic "Wheatstone bridge" circuits, i.e. with four nodes, P-A-T-B, and on-off or proportional valves in each link
F15B 11/042
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
04for controlling the speed
042by means in the feed line ; , i.e. "meter in"
F15B 11/05
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
04for controlling the speed
05specially adapted to maintain constant speed, e.g. pressure-compensated, load-responsive
F15B 2211/20546
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
20Fluid pressure source, e.g. accumulator or variable axial piston pump
205Systems with pumps
2053Type of pump
20546variable capacity
F15B 2211/3052
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
3052Shuttle valves
F15B 2211/30535
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
3053In combination with a pressure compensating valve
30535the pressure compensating valve is arranged between pressure source and directional control valve
Applicants
  • CATERPILLAR INC. [US]/[US] (AllExceptUS)
  • SHIN CATERPILLAR MITSUBISHI LTD. [JP]/[JP] (AllExceptUS)
  • MA, Pengfei [CN]/[US] (UsOnly)
  • ST. GERMAIN, Gene, R. [US]/[US] (UsOnly)
  • ZHANG, Jiao [US]/[US] (UsOnly)
  • EGELJA, Aleksandar, M. [BA]/[US] (UsOnly)
  • LEHMANN, Robert, S. [US]/[US] (UsOnly)
  • SOROKINE, Michael, A. [RU]/[US] (UsOnly)
Inventors
  • MA, Pengfei
  • ST. GERMAIN, Gene, R.
  • ZHANG, Jiao
  • EGELJA, Aleksandar, M.
  • LEHMANN, Robert, S.
  • SOROKINE, Michael, A.
Agents
  • KING, Michael, S.
Priority Data
11/117,38529.04.2005US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) HYDRAULIC SYSTEM HAVING A PRESSURE COMPENSATOR
(FR) SYSTEME HYDRAULIQUE AYANT UN COMPENSATEUR DE PRESSION
Abstract
(EN)
A hydraulic system (22) having a source (24) of pressurized fluid, a fluid actuator (16) with a first chamber (50) and a second chamber (52), and a body (90). The body has a first valve (26) configured to selectively fluidly communicate the source with the first chamber and a second valve (30) configured to selectively fluidly communicate the source with the second chamber. The body also has a proportional pressure compensating valve (36) to control a pressure of fluid directed between the source and the first and second valves and a supply passageway (61) disposed between the source and the first and second valves in parallel and the proportional pressure compensating valve is disposed within the supply passageway.
(FR)
Système hydraulique (22) ayant une source (24) de fluide pressurisé, un actionneur de fluide (16) avec une première chambre (50) et une seconde chambre (52), et un corps (90). Le corps a une première vanne (26) configurée pour faire communiquer sélectivement de manière fluide la source avec la première chambre et une seconde vanne (30) configurée pour faire communiquer sélectivement de manière fluide la source avec la seconde chambre. Le corps a également une vanne de compensation de pression proportionnelle (36) pour commander une pression d'un fluide guidé entre la source et les première et seconde chambres et une voie de passage d'alimentation (61) disposée entre la source et les première et seconde vannes en parallèle et la vanne de compensation de pression proportionnelle est disposée dans la voie de passage d'alimentation.
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