EP 0728263 B1 19980429 - METHOD OF COOLING THE HYDRAULIC FLUID IN THE WORKING CIRCUIT OF A CONSTRUCTION MACHINE, IN PARTICULAR A HYDRAULIC EXCAVATOR
Title (en)
METHOD OF COOLING THE HYDRAULIC FLUID IN THE WORKING CIRCUIT OF A CONSTRUCTION MACHINE, IN PARTICULAR A HYDRAULIC EXCAVATOR
Title (de)
ÖLKÜHLUNG IM ARBEITSKREISLAUF EINER BAUMASCHINE, INSBESONDERE EINES HYDRAULIKBAGGERS
Title (fr)
PROCEDE DE REFROIDISSEMENT DE L'HUILE DU CIRCUIT HYDRAULIQUE D'UN ENGIN DE CHANTIER, NOTAMMENT UNE PELLE EXCAVATRICE HYDRAULIQUE
Publication
Application
Priority
EP 9303235 W 19931119
Abstract (en)
[origin: US5709085A] PCT No. PCT/EP93/03235 Sec. 371 Date May 17, 1996 Sec. 102(e) Date May 17, 1996 PCT Filed Nov. 19, 1993 PCT Pub. No. WO95/14175 PCT Pub. Date May 26, 1995A method for cooling hydraulic oil present in an operating circuit of a construction machine, and an installation for cooling hydraulic oil according to the method. The method includes the steps of guiding the hydraulic oil at least partially over an oil cooler and thereafter causing the hydraulic oil to flow into a hydraulic oil tank. The hydraulic oil returning from operating areas of the operating circuit is stored intermediately and has an elevated temperature, the storage occurring in an intermediate reservoir spatially separate from the hydraulic oil present in the hydraulic oil tank prior to causing the hydraulic oil to flow into the hydraulic oil tank. The hydraulic oil is pumped from the intermediate reservoir to the oil cooler for lowering the temperature of the hydraulic oil prior to causing the hydraulic oil to flow into the hydraulic oil tank. The hydraulic oil is then caused to flow into the hydraulic oil tank from the oil cooler for mixing the hydraulic oil flowing into the hydraulic oil tank from the oil cooler with the hydraulic oil present in the hydraulic oil tank. The hydraulic oil flowing into the hydraulic oil tank from the oil cooler has a temperature different from the temperature of the hydraulic oil present in the hydraulic oil tank.
IPC 1-7
IPC 8 full level
E02F 9/22 (2006.01); F15B 1/26 (2006.01); F15B 21/04 (2019.01); F15B 21/0423 (2019.01)
CPC (source: EP US)
E02F 9/226 (2013.01 - EP US); E02F 9/2292 (2013.01 - EP US); F15B 1/26 (2013.01 - EP); F15B 21/04 (2013.01 - EP US); F15B 21/0423 (2018.12 - EP US)
Designated contracting state (EPC)
BE DE FR GB IT
DOCDB simple family (publication)
US 5709085 A 19980120; DE 4232542 C1 19940127; DE 59308483 D1 19980604; EP 0728263 A1 19960828; EP 0728263 B1 19980429; JP H09505131 A 19970520; WO 9514175 A1 19950526
DOCDB simple family (application)
US 64805396 A 19960517; DE 4232542 A 19920929; DE 59308483 T 19931119; EP 9303235 W 19931119; EP 94901819 A 19931119; JP 51416995 A 19931119