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:
Mar. 17, 2015
Filed:
Jan. 06, 2012
Kensuke Sato, Ushiku, JP;
Tsuyoshi Nakamura, Tsuchiura, JP;
Takahiro Kobayashi, Tsuchiura, JP;
Hiroyuki Azuma, Ushiku, JP;
Kensuke Sato, Ushiku, JP;
Tsuyoshi Nakamura, Tsuchiura, JP;
Takahiro Kobayashi, Tsuchiura, JP;
Hiroyuki Azuma, Ushiku, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
On a rear part side of a revolving frame () constituting an upper revolving structure (), a counterweight () holding weight balance with a working mechanism () is provided, and on the front side of the counterweight (), an engine () and an exhaust gas post-treatment device () for applying purification treatment to an exhaust gas of the engine () are provided. The exhaust gas post-treatment device () is configured by connecting a PM trapping filter device () and an NOx purifying device (), and the PM trapping filter device () is mounted on the engine (), while the NOx purifying device () is mounted on the counterweight (). When the counterweight () is to be removed from the revolving frame (), the NOx purifying device () is supported by a treatment device support bracket () mounted on the engine (). As a result, the counterweight () can be removed while the PM trapping filter device () and the NOx purifying device () are connected.