Construction machine

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9863123
SERIAL NO

14915301

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ATTORNEY / AGENT: (SPONSORED)

Importance

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Abstract

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A construction machine is characterized by including: a track structure 10; a swing structure 20 provided on the track structure 10 in a swingable manner; swing motors 25, 27 that drive and swing the swing structure; a boom 31 connected to the swing structure 20; a boom cylinder 32 that moves the boom 31 vertically; a swing operation system 72 that instructs a swing operation of the swing structure 20; a boom operation system 78 that instructs a vertical movement of the boom 31; a detector 74d that detects a bottom pressure of the boom cylinder 32; and a controller 80 that reduces swing speed of the swing structure 20 according to a signal from the detector 74d with respect to a reference swing speed according to a signal of the swing operation, while signals of the swing operation and a boom raising operation are being inputted. This ensures that a load acting on the boom can be felt on the basis of motion of a front work implement, and, on the other hand, the front work implement can be operated along a locus according to operation without being affected by the load on the boom.

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First Claim

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Patent Owner(s)

Patent OwnerAddress
HITACHI CONSTRUCTION MACHINERY CO LTD16-1 HIGASHIUENO 2-CHOME TAITO-KU TOKYO 1100015 ?1100015

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Imura, Shinya Toride, JP 80 338
Ishikawa, Kouji Kasumigaura, JP 152 903
Kaneta, Tomoaki Kasumigaura, JP 11 11
Satake, Hidetoshi Ishioka, JP 71 363

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Maintenance Fees

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