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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 9382693 B1

PDFFull Text
Date of Patent:
Jul. 05, 2016

Filed:

Apr. 28, 2014

Work vehicle and work vehicle control method

Applicant:

Komatsu Ltd., Tokyo, JP;

Inventors:

Takeo Yamada, Komatsu, JP;

Tomohiro Nakagawa, Hirakata, JP;

Assignee:

KOMATSU LTD., Tokyo, JP;

Attorney:

Global IP Counselors, LLP

Primary Examiner:

Marthe Marc-Coleman

Int. Cl.
CPC ...
E02F 9/22 (2006.01); E02F 9/14 (2006.01); F15B 11/10 (2006.01); F15B 13/04 (2006.01); F16K 31/42 (2006.01); G05D 7/06 (2006.01); E02F 9/20 (2006.01); F15B 21/08 (2006.01);
U.S. Cl.
CPC ...
E02F 9/2221 (2013.01); E02F 9/14 (2013.01); E02F 9/2012 (2013.01); E02F 9/2282 (2013.01); E02F 9/2285 (2013.01); E02F 9/2292 (2013.01); F15B 11/10 (2013.01); F15B 13/0401 (2013.01); F15B 21/08 (2013.01); F16K 31/42 (2013.01); G05D 7/0641 (2013.01); F15B 2211/575 (2013.01); F15B 2211/6316 (2013.01); F15B 2211/6346 (2013.01); F15B 2211/6355 (2013.01); F15B 2211/6653 (2013.01); F15B 2211/67 (2013.01); Y10T 137/0379 (2015.04); Y10T 137/87113 (2015.04);
Abstract

A hydraulic excavator is provided with an arm cylinder, an arm switching valve, a sixth pilot pressure control valve, a sixth electromagnetic proportional valve, a sixth upstream pilot flow path, a sixth hydraulic pressure sensor, and a control section. The control section selects at least one item of current value information from a plurality of items of current value information on the basis of a hydraulic pressure that is detected by the sixth hydraulic pressure sensor. The control section is configured to set a current value of a current that is output to the sixth electromagnetic proportional valve on the basis of the current value information that is selected.

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