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:
Aug. 01, 2017
Filed:
Sep. 07, 2016
Hitachi Construction Machinery Co., Ltd., Taito-ku, Tokyo, JP;
Shinya Abe, Tsuchiura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
An exhaust pipe (A) in an engine () is provided with an exhaust gas purifying device () with a urea selective reduction catalyst (A) removing nitrogen oxides in an exhaust gas. The exhaust gas purifying device () is provided with a urea water injection valve () that injects urea water as a reducing agent to the upstream side of the urea selective reduction catalyst (A). The urea water injection valve () is connected to a urea water tank () through a urea water pump (). The urea water pump () is arranged in an upper side to the urea water tank (). A return conduit line () in which the urea water flows from the urea water pump () toward the urea water tank () is disposed in an upper-lower direction between the urea water pump () and the urea water tank ().