Title:
【発明の名称】油圧駆動装置
Document Type and Number:
Japanese Patent JP2860163
Kind Code:
B2
Abstract:
There are provided: a check valve (cb1) for detecting pressure at the outlet side of a pressure compensator (VB1); a maximum load pressure detecting pipeline (SL1) for selecting a higher pressure out of a pressure detected by said check valve (cb1) and a load pressure of an actuator belonging to a hydraulic pump (P1), to thereby supply it as a signal pressure; a check valve (cb2) for detecting a pressure at the outlet side of a pressure compensator (VB2); a maximum load pressure detecting pipeline (SL2) being independent of said maximum load pressure detecting pipeline (SL1) for selecting a higher pressure out of a pressure detected by said check valve (cb2) and a load pressure of an actuator belonging to a second hydraulic pump (P2), to thereby supply it as a signal pressure; and a path (300) for merging the pressure oils from the first and second hydraulic pumps (P1 and P2), which have flowed out of variable throttles (RB1 and RB2), to thereby supply it to an actuator (B). With this arrangement, said two hydraulic pumps (P1 and P2) can have independence of each secured.
Inventors:
NOZAWA JUSAKU
OOTSU WATARU
ICHIKI NOBUHIKO
INO KAZUYUKI
MATSUZAKI HIROSHI
TAKAHASHI KINYA
OOTSU WATARU
ICHIKI NOBUHIKO
INO KAZUYUKI
MATSUZAKI HIROSHI
TAKAHASHI KINYA
Application Number:
JP51966393A
Publication Date:
February 24, 1999
Filing Date:
May 21, 1993
Export Citation:
Assignee:
HITACHI KENKI KK
International Classes:
E02F9/22; F15B11/00; F15B11/05; F15B11/17; F15B13/04; (IPC1-7): F15B11/05; E02F9/22; F15B11/17
Domestic Patent References:
| JP419412A | ||||
| JP3260401A | ||||
| JP58118307A |
Attorney, Agent or Firm:
Kasuga