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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9108516 B1

PDFFull Text
Date of Patent:
Aug. 18, 2015

Filed:

Dec. 19, 2013

Working machine

Applicants:

Sumitomo Heavy Industries, Ltd., Tokyo, JP;

Sumitomo (S.h.i.) Construction Machinery Co., Ltd., Tokyo, JP;

Inventors:

Yuta Sugiyama, Yokosuka, JP;

Hideaki Yuasa, Yokosuka, JP;

Kiminori Sano, Chiba, JP;

Assignees:

SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo, JP;

SUMITOMO (S.H.I.) CONSTRUCTION MACHINERY CO., LTD., Tokyo, JP;

Attorney:

Squire Patton Boggs (US) LLP

Primary Examiner:

Michael J Zanelli

Int. Cl.
CPC ...
B60K 11/02 (2006.01); B60L 15/00 (2006.01); B60K 6/12 (2006.01); B60K 6/485 (2007.10); B60L 1/00 (2006.01); B60L 11/12 (2006.01); B66C 1/06 (2006.01); E02F 9/20 (2006.01);
U.S. Cl.
CPC ...
B60L 15/00 (2013.01); B60K 6/12 (2013.01); B60K 6/485 (2013.01); B60K 11/02 (2013.01); B60L 1/003 (2013.01); B60L 1/20 (2013.01); B60L 11/123 (2013.01); B66C 1/06 (2013.01); E02F 9/2075 (2013.01); E02F 9/2091 (2013.01); E02F 9/2095 (2013.01); B60L 2200/40 (2013.01); B60L 2210/12 (2013.01); B60L 2210/14 (2013.01); B60L 2210/20 (2013.01); Y02T 10/6208 (2013.01); Y02T 10/6217 (2013.01); Y02T 10/6226 (2013.01); Y02T 10/6282 (2013.01); Y02T 10/7077 (2013.01); Y02T 10/725 (2013.01); Y02T 10/7225 (2013.01); Y02T 10/7233 (2013.01); Y10S 903/903 (2013.01);
Abstract

Provided is a working machine capable of decreasing a voltage of a DC busbar (DC bus) with a configuration suppressing a degradation in reliability. A hybrid type construction machine as a working machine includes: a DC bus which is connected to a rotation motor via an inverter circuit, a battery which is connected to the DC bus via a step-up/step-down converter and a switch, a controller which drives the inverter circuit and the step-up/step-down converter, a cooling liquid circulating system which includes a pump motor, and an inverter circuit which is connected to the DC bus and driving the pump motor. The controller includes a mode used for decreasing the voltage of the DC bus, and in that mode, the switch enters a disconnection state and the inverter circuit is operated to consume electricity in the pump motor.

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