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1. (WO1991007596) DEVICE FOR IMPROVEMENT OF RUNNING CONDITION IN HYDRAULIC SYSTEM
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1991/007596 International Application No.: PCT/SE1990/000714
Publication Date: 30.05.1991 International Filing Date: 05.11.1990
Chapter 2 Demand Filed: 31.05.1991
IPC:
F15B 21/04 (2006.01)
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
21
Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
04
Special measures taken in connection with the properties of the fluid, e.g. for venting, compensating for changes of viscosity, cooling, filtering, preventing churning
Applicants:
INGVAST, Håkan [SE/SE]; SE
Inventors:
INGVAST, Håkan; SE
Agent:
ONN, Thorsten ; AB Stockholms Patentbyrå, Zacco & Bruhn Box 23101 S-104 35 Stockholm, SE
Priority Data:
8903739-408.11.1989SE
Title (EN) DEVICE FOR IMPROVEMENT OF RUNNING CONDITION IN HYDRAULIC SYSTEM
(FR) DISPOSITIF D'AMELIORATION DE L'ETAT DE FONCTIONNEMENT D'UN SYSTEME HYDRAULIQUE
Abstract:
(EN) The present patent application refers to a device for the improvement of the running conditions in a hydraulic installation or in so-called hydraulic system. The device contains a central circulating circuit separated from the influence of the atmosphere. To the circulating circuit are connected an outlet and an inlet for the connection of the hydraulic fluid to the other parts of the hydraulic system. The mentioned circulating circuit is divided into at least two chambers separated by pressure generating respectively pressure reducing units (3, 4, 5). The first chamber (1) is to a certain extent an expansion room for the hydraulic fluid in the system which is separated from the atmosphere and it forms a low-pressure part in the circuit. The second chamber (2) forms a high-pressure part which directly or indirectly is connected to the said outlet. The circulating circuit holds medium (4, 13) for the cooling and filtering of the hydraulic fluid.
(FR) Dispositif d'amélioration des états de fonctionnement d'une installation hydraulique ou d'un système hydraulique proprement dit. Le dispositif contient un circuit central de circulation séparé de l'influence de l'atmosphère. Au circuit de circulation sont raccordées une sortie et une admission permettant la connexion du fluide hydraulique aux autres parties du système hydraulique. Le circuit de circulation mentionnée est divisé en au moins deux chambres séparées par des unités de réduction de pression (3, 4, 5) respectivement, produisant une pression. La première chambre (1) représente dans une certaine mesure un vase d'expansion du fluide hydraulique se trouvant dans le système, lequel est séparé de l'atmosphère, et forme une partie de basse pression dans le circuit. La seconde chambre (2) forme une partie de haute pression reliée directement ou indirectement à ladite sortie. Le circuit de circulation contient le milieu (4, 13) de refroidissement et de filtrage du fluide hydraulique.
Designated States: AU, CA, FI, JP, NO, US
European Patent Office (AT, BE, CH, DE, DK, ES, FR, GB, GR, IT, LU, NL, SE)
Publication Language: English (EN)
Filing Language: Swedish (SV)
Also published as:
FI922084NO19921818EP0666964US5317872JPH05501444CA2073000
AU1990067279