EP 0671512 A3 19960424 - Hydraulic locking device for quick couplings in construction machines.
Title (en)
Hydraulic locking device for quick couplings in construction machines.
Title (de)
Hydraulisch betätigte Verriegelungsvorrichtung für Schnellwechsler an Bau- und Arbeitsmaschinen.
Title (fr)
Dispositif hydraulique de blocage pour dispositifs d'attelage rapide d'engins de chantier.
Publication
Application
Priority
DE 4408386 A 19940312
Abstract (en)
[origin: EP0671512A2] The locking system has at least one cylinder (3), containing at least one piston (64) connected to a locking bolt (8), via a piston rod (7). The piston is actuated by hydraulic pressure supplied by pipes (4,5) from a control valve (6). A device (19) connects the opposite faces of the piston, and can be situated inside the piston. The device can also be built into the hydraulic circuit external to the cylinder, and may take the form of a connection of smaller cross-section than the supply pipes, and may also contain an aperture.
IPC 1-7
IPC 8 full level
E02F 3/36 (2006.01); E02F 9/22 (2006.01); F15B 15/20 (2006.01)
CPC (source: EP)
E02F 3/3663 (2013.01); E02F 9/2267 (2013.01); E02F 9/2271 (2013.01)
Citation (search report)
- [Y] DE 4102370 A1 19910814 - FRITZEL WALTER [DE]
- [Y] US 4872310 A 19891010 - KAYE ARTHUR [GB]
- [Y] US 4337687 A 19820706 - HOOVER ROBERT A
- [A] FR 2304726 A1 19761015 - LIEBHERR HYDRAULIKBAGGER [DE]
Designated contracting state (EPC)
AT CH DE ES FR IT LI NL
DOCDB simple family (publication)
EP 0671512 A2 19950913; EP 0671512 A3 19960424; EP 0671512 B1 19990811; AT E183270 T1 19990815; DE 4408386 A1 19950921; DE 4408386 C2 19960704; DE 59506556 D1 19990916; ES 2137382 T3 19991216
DOCDB simple family (application)
EP 95100825 A 19950123; AT 95100825 T 19950123; DE 4408386 A 19940312; DE 59506556 T 19950123; ES 95100825 T 19950123