Invention Grant
- Patent Title: Hydraulic circuit for construction machine and control device therefor
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Application No.: US14538920Application Date: 2014-11-12
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Publication No.: US09932994B2Publication Date: 2018-04-03
- Inventor: Hirofumi Hashimoto
- Applicant: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
- Current Assignee: SUMITOMO(S.H.I.) CONSTRUCTION MACHINERY CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: IPUSA, PLLC
- Priority: JP2012-136352 20120615
- Main IPC: F16K31/00
- IPC: F16K31/00 ; F15B11/10 ; F15B13/04 ; E02F9/22 ; F15B11/16
Abstract:
A hydraulic circuit for a construction machine including a direction control valve group including direction control valves provided in tandem to a center bypass passage, a bleed-off valve provided to the center bypass passage downstream of the direction control valve group, and a control valve controlling an amount of pressure oil to be supplied to the direction control valve.
Public/Granted literature
- US20150059331A1 HYDRAULIC CIRCUIT FOR CONSTRUCTION MACHINE AND CONTROL DEVICE THEREFOR Public/Granted day:2015-03-05
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