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:
Feb. 05, 2013
Filed:
May. 09, 2009
Masanori Ezawa, Tsukuba, JP;
Shouhei Kamiya, Kasumigaura, JP;
Takashi Hirose, Tsuchiura, JP;
Yasushi Arai, Tsuchiura, JP;
Masanori Ezawa, Tsukuba, JP;
Shouhei Kamiya, Kasumigaura, JP;
Takashi Hirose, Tsuchiura, JP;
Yasushi Arai, Tsuchiura, JP;
Hitachi Construction Machinery Co., Ltd., Tokyo, JP;
Abstract
An upstream cylinder () and a downstream cylinder () are fixedly mounted to a support member (), and a filter cylinder () is provided mountably and dismountably between the cylinders () and (). In consequence, only the filter cylinder () can be dismounted with the cylinders () and () left as they are on the support member (), so that the maintenance operation of a particulate matter removing filter () can be performed easily. In addition, pressure conduits () and () and a pressure sensor () of a pressure detection unit () for detecting a clogged state of the particulate matter removing filter () are disposed at positions offset from a moving path () of the filter cylinder (). In consequence, only the filter cylinder () can be easily mounted or dismounted without being obstructed by the pressure conduits () and () and the pressure sensor ().