Title (en)

Hydraulic system

Title (de)

Hydrauliksystem

Title (fr)

Système hydraulique

Publication

EP 0793023 A1 19970903 (EN)

Application

EP 97103137 A 19970226

Priority

DE 19607479 A 19960228

Abstract (en)

A hydraulic system comprises at least one control unit (10,12) and at least one actuator (14) which is connected via conduits (16,18) to the control unit and which can be driven via the latter in reciprocating motion against and with a load acting on the actuator, in particular upwards and downwards against gravity. The system further comprises a pressure-compensating valve (78) for matching the pressure in the conduit (16), which serves as a return conduit during movement of the actuator (14) with the load, to the load pressure by replenishing the return conduit from the feed conduit (18). <IMAGE>

IPC 1-7

F15B 13/01

IPC 8 full level

B66F 17/00 (2006.01); E02F 9/22 (2006.01); E06C 5/06 (2006.01); F15B 11/00 (2006.01); F15B 11/02 (2006.01); F15B 11/04 (2006.01); F15B 13/01 (2006.01)

CPC (source: EP)

E02F 9/2225 (2013.01); E06C 5/06 (2013.01); F15B 11/003 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/30515 (2013.01); F15B 2211/3054 (2013.01); F15B 2211/3116 (2013.01); F15B 2211/3138 (2013.01); F15B 2211/31576 (2013.01); F15B 2211/31588 (2013.01); F15B 2211/327 (2013.01); F15B 2211/40515 (2013.01); F15B 2211/413 (2013.01); F15B 2211/41527 (2013.01); F15B 2211/426 (2013.01); F15B 2211/455 (2013.01); F15B 2211/46 (2013.01); F15B 2211/50518 (2013.01); F15B 2211/50545 (2013.01); F15B 2211/50581 (2013.01); F15B 2211/513 (2013.01); F15B 2211/5153 (2013.01); F15B 2211/528 (2013.01); F15B 2211/55 (2013.01); F15B 2211/555 (2013.01)

Citation (search report)

• [X] FR 2312676 A1 19761224 - CATERPILLAR TRACTOR CO [US]
• [A] US 4008731 A 19770222 - KATZ SHERWIN D
• [A] EP 0468944 A1 19920129 - ANDERSSON BO [SE]
• [A] PATENT ABSTRACTS OF JAPAN vol. 017, no. 430 (M - 1460) 10 August 1993 (1993-08-10)

Designated contracting state (EPC)

AT CH DE ES FR GB IT LI

DOCDB simple family (publication)

EP 0793023 A1 19970903; EP 0793023 B1 20000927; AT E196674 T1 20001015; DE 19607479 A1 19970904; DE 69703170 D1 20001102; DE 69703170 T2 20010517; ES 2151692 T3 20010101; JP H09324802 A 19971216

DOCDB simple family (application)

EP 97103137 A 19970226; AT 97103137 T 19970226; DE 19607479 A 19960228; DE 69703170 T 19970226; ES 97103137 T 19970226; JP 4102097 A 19970225