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:
May. 29, 2012
Filed:
Mar. 06, 2008
Shohei Kamiya, Ibaraki, JP;
Yasushi Arai, Ibaraki, JP;
Kazunori Nakamura, Ibaraki, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
A ureal water tank (), a storage of an aqueous urea solution, is located within a utility room (G) in a right front section of a revolving frame (), which is readily accessible from outside. In this instance, among a plurality of operating oil conduits (), a working mechanism operating conduit () which supplies operating oil to a boom cylinder (D) of a working mechanism () is arranged to run along exterior surfaces of the ureal water tank (). Therefore, even if the ureal water tank () is located in a place with no heat source, the aqueous urea solution in the ureal water tank () can be stably kept in a heated state by utilization of heat of operating oil in circulation through the working mechanism operating conduit ().