EP 1522740 A1 20050413 - A cushion valve for hydraulic remote controls of hydraulic directional valves
Title (en)
A cushion valve for hydraulic remote controls of hydraulic directional valves
Title (de)
Dämpfungsventil für die hydraulische Steuerung hydraulischer Wegeventile
Title (fr)
Clapet d'amortissement pour dispositifs de commande hydraulique à distance de distributeurs hydrauliques
Publication
Application
Priority
EP 03425649 A 20031006
Abstract (en)
A cushion valve is applied to a directional valve (2) of known type, and comprises, on each line (4, 5) which takes fluid from the joystick (3) to the directional valve (2), a check valve (4a, 5a) and a pressure compensated flow control valve (4b, 5b) arranged in parallel on a relative line (4, 5) in order to obtain, on each line, according to circumstances, free delivery and controlled return of the fluid; each check valve (4a, 5a) located on a line (4, 5) being piloted to open by a pilot pressure constituted by a fluid pressure entering the check valve present on another line (4, 5). <IMAGE>
IPC 1-7
IPC 8 full level
E02F 9/22 (2006.01); F15B 13/042 (2006.01)
CPC (source: EP)
E02F 9/2207 (2013.01); F15B 13/0422 (2013.01)
Citation (search report)
- [X] JP H1181391 A 19990326 - KOMATSU MFG CO LTD
- [X] US 3974742 A 19760817 - JOHNSON HOWARD L
- [A] JP H04343925 A 19921130 - KUBOTA KK
- [A] EP 0281635 A1 19880914 - HITACHI CONSTRUCTION MACHINERY [JP]
- [A] US 4362018 A 19821207 - TORII SATORU
- [X] PATENT ABSTRACTS OF JAPAN vol. 2002, no. 08 5 August 2002 (2002-08-05)
- [A] PATENT ABSTRACTS OF JAPAN vol. 017, no. 671 (M - 1525) 10 December 1993 (1993-12-10)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
DOCDB simple family (application)
EP 03425649 A 20031006