Work machine
AssigneeSumitomo Construction Machinery Co., Ltd.
InventorsKai IKUTA, Nobutada SAKATA
Life of this patent
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Abstract
A work machine includes a lower traveling body; an upper swing body configured to be swingably mounted on the lower traveling body; a hydraulic actuator; a hydraulic pump configured to supply hydraulic oil to the hydraulic actuator; a first control valve provided in a first oil passage connecting the hydraulic pump and a hydraulic oil tank; a second control valve provided in a second oil passage connecting the hydraulic pump and the hydraulic actuator; and a third control valve provided between the hydraulic pump and the second control valve in the second oil passage. The third control valve is configured to shut off the second oil passage when a load on a drive source is intentionally increased.
Claims6
A work machine comprising:
- a lower traveling body;
- an upper swing body configured to be swingably mounted on the lower traveling body;
- a hydraulic actuator;
- a hydraulic pump configured to supply hydraulic oil to the hydraulic actuator;
- a first control valve provided in a first oil passage connecting the hydraulic pump and a hydraulic oil tank;
- a second control valve provided in a second oil passage connecting the hydraulic pump and the hydraulic actuator;
- and
- a third control valve provided between the hydraulic pump and the second control valve in the second oil passage, wherein
- the third control valve is configured to shut off the second oil passage when a load on a drive source is intentionally increased.
Dependencies are inferred from the claim text.