EP 0388641 B1 19930428 - HYDRAULIC SYSTEM FOR EARTH-MOVING MACHINES, IN PARTICULAR FOR LOADERS, TRACTORS AND THE LIKE
Title (en)
HYDRAULIC SYSTEM FOR EARTH-MOVING MACHINES, IN PARTICULAR FOR LOADERS, TRACTORS AND THE LIKE
Publication
Application
Priority
DE 3909205 A 19890321
Abstract (en)
[origin: EP0388641A2] A hydraulic system for earth-moving machines, in particular for loaders, tractors and the like, is provided with an implement, in particular a loading shovel, which can be actuated via hydraulic cylinders (3), a main line (1) being provided for the actuation of the hydraulic cylinders (3), which main line (1) leads from a pressure source via a control valve (2) to the hydraulic cylinders (3) and from which a connecting line (13) branches off downstream of the control valve (2), which connecting line (13) leads to at least one hydraulic reservoir (12) and in which a controllable shut-off valve (14) is arranged. A filling line (19, 20) is provided which bridges the shut-off valve (14) and connects the main line (1) to the hydraulic reservoir (12). A pressure-reducing valve (21) is arranged in the filling line (19, 20). <IMAGE>
IPC 1-7
IPC 8 full level
CPC (source: EP)
E02F 9/2207 (2013.01); E02F 9/2217 (2013.01); E02F 9/226 (2013.01); F15B 1/021 (2013.01)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0388641 A2 19900926; EP 0388641 A3 19910605; EP 0388641 B1 19930428; AT E88773 T1 19930515; DE 3909205 C1 19900523; DE 59001284 D1 19930603; DK 0388641 T3 19930927; ES 2041061 T3 19931101
DOCDB simple family (application)
EP 90103203 A 19900220; AT 90103203 T 19900220; DE 3909205 A 19890321; DE 59001284 T 19900220; DK 90103203 T 19900220; ES 90103203 T 19900220