EP 1370773 B1 20050622 - CONTROL VALVE
Title (en)
CONTROL VALVE
Title (de)
WEGEVENTIL
Title (fr)
DISTRIBUTEUR
Publication
Application
Priority
- CH 5222001 A 20010321
- IB 0200661 W 20020304
Abstract (en)
[origin: WO02075162A1] The invention relates to a control valve (10) for controlling the pressure and flow of hydraulic oil from or to the working connections (A, B) of a consumer. The pressure and the pressure flow are controlled by means of at least one sliding piston (13) which can be actuated by at least one drive mechanism (15.1, 15.2) and which can be displaced in a slider hole and in co-operating annular channels (19, 21, 22, 23, 24, 25, 26, 28, 29). The invention is characterised in that the annular channels (19, 21, 22, 23, 24, 25, 26, 28, 29) are symmetrically arranged, whereby a tank connection annular channel (19) is arranged in the symmetrical centre point on a symmetrical axis. Annular channels (23, 24) associated with the working connections (A,B), pump-pressure annular channels (25, 26), load-sensing annular channels (28, 29) and end-chamber annular channels (21, 22) are arranged behind each other on both sides. According to the invention, the latter can be connected to other channels. The aim of the invention is to create equivalent hydraulic ratios for both working connections A and B and to keep the number of control edges in the control valve (10) to a minimum.
IPC 1-7
IPC 8 full level
F15B 13/04 (2006.01)
CPC (source: EP US)
F15B 13/0402 (2013.01 - EP US); F15B 13/0418 (2013.01 - EP US); Y10T 137/5109 (2015.04 - EP US); Y10T 137/86614 (2015.04 - EP US); Y10T 137/86622 (2015.04 - EP US); Y10T 137/87209 (2015.04 - EP US); Y10T 137/87217 (2015.04 - EP US)
Designated contracting state (EPC)
AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR
DOCDB simple family (publication)
WO 02075162 A1 20020926; AT E298395 T1 20050715; DE 50203452 D1 20050728; EP 1370773 A1 20031217; EP 1370773 B1 20050622; US 2004079425 A1 20040429; US 7100639 B2 20060905
DOCDB simple family (application)
IB 0200661 W 20020304; AT 02702621 T 20020304; DE 50203452 T 20020304; EP 02702621 A 20020304; US 47241903 A 20030919