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.:
Date of Patent:
Apr. 23, 2013
Filed:
Dec. 08, 2009
Takayoshi Murahashi, Tsuchiura, JP;
Toshikazu Minoshima, Kasumigaura, JP;
Takao Kurosawa, Ushiku, JP;
Takayoshi Murahashi, Tsuchiura, JP;
Toshikazu Minoshima, Kasumigaura, JP;
Takao Kurosawa, Ushiku, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
When the drive of a lubricant pump () is stopped to prevent the lubricant pump () from assuming an idling state, a determination is made as to whether or not a temperature difference (ΔT) between the temperature (T) of a lubricant oil detected earlier by a temperature sensor () and a warning temperature (Toh) is equal to or lower than a predetermined threshold value (α). When the temperature difference (ΔT) is within the threshold value (α), an 'overheat' warning is issued to an operator of a dump truck (). In consequence, even in a case where a temperature sensor () is provided on the output side of the lubricant pump () by being located on an outer side of a wheel mounting case (), planetary gear reduction mechanisms (), () inside the wheel mounting case () can be prevented from overheating by warning the operator of the vehicle.