Invention Grant
- Patent Title: Construction machine
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Application No.: US16760530Application Date: 2018-11-08
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Publication No.: US11668069B2Publication Date: 2023-06-06
- Inventor: Shinji Ishihara , Hiroshi Sakamoto , Hidekazu Moriki , Ryu Narikawa
- Applicant: HITACHI CONSTRUCTION MACHINERY CO., LTD.
- Applicant Address: JP Tokyo
- Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
- Current Assignee: HITACHI CONSTRUCTION MACHINERY CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Mattingly & Malur, PC
- Priority: JP 2017218071 2017.11.13
- International Application: PCT/JP2018/041499 2018.11.08
- International Announcement: WO2019/093424A 2019.05.16
- Date entered country: 2020-04-30
- Main IPC: E02F3/43
- IPC: E02F3/43 ; E02D3/046 ; E02F9/22

Abstract:
A construction machine that can make a depressing force of a bucket during compaction work to be uniform without requiring an operator to perform a complicated operation is provided. A controller 18 determines whether or not compaction work is in progress, calculates a front distance R that represents a distance between a rotational pivot of a boom 4 and a predetermined position B in a back surface of a bucket 6, determines a target velocity of the bucket such that a velocity with which the bucket approaches a leveling target surface decreases with increasing values of the front distance, and, during the compaction work, notifies the operator of details of an operation of operation devices 9a and 9b for achieving the target velocity of the bucket or controls hydraulic actuators 4a to 6a so as to achieve the target velocity of the bucket.
Public/Granted literature
- US20210040705A1 CONSTRUCTION MACHINE Public/Granted day:2021-02-11
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