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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 9546673 B1

PDFFull Text
Date of Patent:
Jan. 17, 2017

Filed:

Nov. 30, 2012

Hydraulic drive system

Applicants:

Kabushiki Kaisha Kcm, Kako-gun, Hyogo, JP;

Kawasaki Jukogyo Kabushiki Kaisha, Kobe-shi, Hyogo, JP;

Inventors:

Shinichiro Tanaka, Kakogawa, JP;

Hiroyasu Kodera, Kobe, JP;

Makoto Ito, Kobe, JP;

Assignee:

KABUSHIKI KAISHA KCM, Hyogo, JP;

Attorney:

Oliff PLC

Primary Examiner:

Michael Leslie

Int. Cl.
CPC ...
F16D 31/02 (2006.01); F15B 21/00 (2006.01); E02F 9/22 (2006.01); F15B 11/16 (2006.01); F15B 1/26 (2006.01); F16H 61/4017 (2010.01); B62D 5/06 (2006.01); F01N 3/023 (2006.01);
U.S. Cl.
CPC ...
F15B 21/001 (2013.01); B62D 5/063 (2013.01); E02F 9/225 (2013.01); E02F 9/2228 (2013.01); E02F 9/2246 (2013.01); E02F 9/2285 (2013.01); F15B 1/26 (2013.01); F15B 11/162 (2013.01); F16H 61/4017 (2013.01); F01N 3/023 (2013.01); F01N 2590/08 (2013.01); F15B 2211/20523 (2013.01); F15B 2211/252 (2013.01); F15B 2211/4053 (2013.01); F15B 2211/428 (2013.01); F15B 2211/6355 (2013.01); F15B 2211/6658 (2013.01); F15B 2211/67 (2013.01); F15B 2211/7135 (2013.01); F15B 2211/781 (2013.01); F15B 2211/85 (2013.01);
Abstract

A hydraulic drive system includes a pump, a steering actuator, a loading/unloading apparatus actuator, a drive device, a relief valve, and an input unit. The drive device: flows hydraulic oil from the pump to the loading/unloading apparatus actuator when an operating tool is operated; flows the hydraulic oil from the pump to the steering actuator when a steering has become an operated state from a non-operated state regardless of an operation of the operating tool; and causes the hydraulic oil from the pump to be discharged to a tank via the relief valve to increase the torque of an engine when an increase instruction is inputted to the input unit and the steering is in a non-operated state.

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