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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 9077272 B1

PDFFull Text
Date of Patent:
Jul. 07, 2015

Filed:

Dec. 28, 2011

Slewing-type working machine

Applicant:

Mitsunori Hirozawa, Hiroshima, JP;

Inventor:

Mitsunori Hirozawa, Hiroshima, JP;

Assignee:

KOBELCO CONSTRUCTION MACHINERY CO., LTD., Hiroshima-shi, JP;

Attorney:

Oblon, McClelland, Maier & Neustadt, L.L.P.

Primary Examiner:

Paul Ip

Int. Cl.
CPC ...
H02P 1/00 (2006.01); H02P 3/04 (2006.01); H02P 27/00 (2006.01); E02F 9/12 (2006.01); E02F 9/20 (2006.01); E02F 9/26 (2006.01); B60L 1/00 (2006.01); B60L 7/10 (2006.01); B60L 11/14 (2006.01); B60L 11/18 (2006.01);
U.S. Cl.
CPC ...
H02P 27/00 (2013.01); E02F 9/128 (2013.01); E02F 9/2091 (2013.01); E02F 9/2095 (2013.01); E02F 9/268 (2013.01); B60L 1/003 (2013.01); B60L 1/20 (2013.01); B60L 7/10 (2013.01); B60L 11/14 (2013.01); B60L 11/1862 (2013.01); B60L 2200/42 (2013.01); B60L 2240/421 (2013.01); B60L 2240/545 (2013.01); B60L 2240/80 (2013.01); Y02T 10/7077 (2013.01); Y02T 10/7044 (2013.01); Y02T 10/7005 (2013.01); Y02T 10/705 (2013.01); Y02T 10/642 (2013.01); Y02T 10/92 (2013.01); Y02T 10/70 (2013.01);
Abstract

A slewing-type working machine includes: an electric storage device capable of being charged with regenerative electric power for regenerating slewing energy of an upper slewing body while functioning as an electric power source for an electric slewing motor; an electric storage device and electric storage device controller detecting whether the electric storage device is under a normal condition with sufficient capacity to regenerate the slewing energy or under an abnormal condition without sufficient capacity; and a controller controlling a velocity of the electric slewing motor based on a result of detection by the electric storage device and electric storage device controller, wherein the controller performs a velocity limiting control for limiting a maximum velocity of the electric slewing motor when the electric storage device is under the abnormal condition.

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