EP 0442842 B1 19940406 - Hydraulic actuator with pressure intensifier.
Title (en)
Hydraulic actuator with pressure intensifier.
Title (de)
Hydraulikzylinder mit Druckübersetzung.
Title (fr)
Vérin hydraulique avec multiplicateur de pression.
Publication
Application
Priority
CH 47690 A 19900214
Abstract (en)
[origin: EP0442842A1] The hydraulic actuator has a cylinder tube (1), a piston-rod guide flange (2) and a cylinder base (1). A primary piston (4) provided with a piston rod (6) is arranged inside the actuator. Furthermore, a secondary piston (11) connected to two plungers (7, 8) is arranged inside the actuator. The plungers plunge into two bores (5, 6) of the primary piston. Two unlockable non-return valves (17, 18) preloaded by springs (19, 20) are provided in the cylinder base. Located in the non-return valves is one bore (41, 42) each, which connects the front side to the rear side of the respective valve. The rear parts (24, 25) of the valve chambers (26, 27) each have an unlocking piston (21, 22) designed as a ball. Two feed lines (23, 30) for the hydraulic fluid are connected to the non-return valve chambers, these chambers in turn having feed lines at various points of the inner space (16, 40, 45) of the actuator. A very compact type of construction can be made possible for the hydraulic actuator with pressure intensifier.
IPC 1-7
IPC 8 full level
F15B 15/14 (2006.01); F15B 11/032 (2006.01); F15B 15/20 (2006.01)
CPC (source: EP)
F15B 11/0325 (2013.01); F15B 2211/214 (2013.01); F15B 2211/30505 (2013.01); F15B 2211/7053 (2013.01)
Designated contracting state (EPC)
AT CH DE FR GB IT LI
DOCDB simple family (publication)
EP 0442842 A1 19910821; EP 0442842 B1 19940406; AT E104023 T1 19940415; DE 59101302 D1 19940511; JP H051703 A 19930108; PL 165086 B1 19941130; PL 288948 A1 19920127
DOCDB simple family (application)
EP 91810039 A 19910117; AT 91810039 T 19910117; DE 59101302 T 19910117; JP 2010091 A 19910213; PL 28894891 A 19910204