EP 0019597 A2 19801126 - Safety device for hydraulic circuits.
Title (en)
Safety device for hydraulic circuits.
Title (de)
Sicherungsvorrichtung für hydraulische Systeme.
Title (fr)
Dispositif de sécurité pour circuits hydrauliques.
Publication
Application
Priority
IT 6806179 A 19790518
Abstract (en)
A safety device (24) is provided for use, for example, in conjunction with a double-acting hydraulic actuator (18) operating a lifting arm. The safety device (24) is interposed between the actuator (18) and the fluid line (20) along which fluid is supplied to raise the arm. In the event of accidental rupturing of this fluid line (20), the safety device (24) operates to prevent uncontrolled lowering of the arm. The device (24) has a working section which comprises a non-return valve (36) inserted in said line (20) such as to normally only allow fluid into the actuator (18), and control means selectively operable to inhibit the non-return valve (36) and permit fluid to exit from the actuator (18). The control means is itself controlled from a controlling section of the device (24) in such a manner that the control means only operates in the presence both of a control pressure signal (Ps) indicating that the arm is to be lowered, and of normal operating pressures in said line (20).
IPC 1-7
IPC 8 full level
F15B 13/01 (2006.01)
CPC (source: EP)
F15B 13/015 (2013.01)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0019597 A2 19801126; EP 0019597 A3 19810422; IT 1118648 B 19860303; IT 7968061 A0 19790518
DOCDB simple family (application)
EP 80830027 A 19800506; IT 6806179 A 19790518