Title:
MULTI-CONTROL VALVE
Document Type and Number:
WIPO Patent Application WO/2022/172637
Kind Code:
A1
Abstract:
A multi-control valve (1) has a housing (2) provided with a parallel passage (41) for an arm, an arm-drawing supply passage (43), an arm-pushing supply passage (44), a parallel passage (51) for a boom, a boom-raising supply passage (54), and a boom-lowering supply passage (53). The housing (2) is further provided with a sliding hole (23), a head-side passage (62) branching off from the boom-raising supply passage (54) to reach the sliding hole (23), a rod-side passage (61) branching off from the boom-lowering supply passage (53) to reach the sliding hole (23), and a regenerative passage (64) extending from the sliding hole (23) to reach the parallel passage (41) for an arm. In the sliding hole (23), a boom sub-spool (6), which is either a spool (6A) for boom recovery or a spool (6B) for boom regeneration, is inserted.
Inventors:
KONDO AKIHIRO
TODE YOSHIYUKI
MURAOKA HIDEYASU
TODE YOSHIYUKI
MURAOKA HIDEYASU
Application Number:
PCT/JP2021/048666
Publication Date:
August 18, 2022
Filing Date:
December 27, 2021
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
F15B11/00; F15B11/024; F15B21/14
Foreign References:
| JP2012172491A | 2012-09-10 | |||
| US20150059568A1 | 2015-03-05 | |||
| JP6450487B1 | 2019-01-09 | |||
| JPH10252704A | 1998-09-22 |
Attorney, Agent or Firm:
ARCO PATENT & TRADEMARK ATTORNEYS (JP)
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