EP 2884118 A1 20150617 - Hydraulic supply system
Title (en)
Hydraulic supply system
Title (de)
Hydraulisches Versorgungssystem
Title (fr)
Système d'alimentation hydraulique
Publication
Application
Priority
GB 201319154 A 20131030
Abstract (en)
A conversion apparatus is provided for adapting a single-acting lifting cylinder (4) of an agricultural vehicle to a double-acting cylinder. The existing pressurised fluid supply of the vehicle provides a pump (2) supplying the fluid, a tank (3) to receive fluid and coupled to a first chamber (4b) of the cylinder, and a first control valve (30) operable to connect the other chamber (4a) of the cylinder to the pump or the tank. The conversion apparatus provides a second control valve (61) with a check valve (60). A first fluid connection (57) is established from the pump (2) upstream of the first control valve (30) to the second control valve (61), with the check valve (60) configured to oppose fluid flow toward the pump. A second fluid connection (58a-58b) is provided by the second control valve (61) interrupting the connection of the first chamber (4b) to the tank (3), whereby the second control valve (61) is operable to connect the first chamber (4b) to the first fluid connection (57) or the tank (3).
IPC 8 full level
F15B 11/08 (2006.01)
CPC (source: EP)
F15B 11/08 (2013.01); F15B 21/003 (2013.01); E02F 3/844 (2013.01); F15B 2211/30515 (2013.01); F15B 2211/30565 (2013.01); F15B 2211/30575 (2013.01); F15B 2211/329 (2013.01); F15B 2211/7052 (2013.01); F15B 2211/7053 (2013.01)
Citation (search report)
- [XI] US 3851566 A 19741203 - HERRMANN W
- [XI] US 2004177749 A1 20040916 - JOERGENSEN MARTIN RAADKJAER [DK]
- [X] US 2004237768 A1 20041202 - BARBER DENNIS R [US]
- [X] EP 2466152 A1 20120620 - HAWE HYDRAULIK SE [DE]
- [X] US 2009050222 A1 20090226 - JACKSON RANDALL S [US], et al
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
DOCDB simple family (application)
EP 14187181 A 20140930; GB 201319154 A 20131030