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:
Jan. 15, 2013
Filed:
Nov. 20, 2008
Minoru Kowada, Hino, JP;
Tsutomu Shimizu, Hiratsuka, JP;
Minoru Kowada, Hino, JP;
Tsutomu Shimizu, Hiratsuka, JP;
Hino Motors, Ltd., Hino-shi, JP;
Tokyo Roki Co., Ltd., Yokohama-shi, JP;
Abstract
An exhaust emission control device, which can absorb thermal expansion difference between a particulate filter and a selective reduction catalyst without causing urea deposition, has the filter and the catalyst arranged in parallel with each other with their entry ends facing the same direction. An S-shaped communication passage is provided to introduce the exhaust gas from a discharge end of the filter into an entry end of the catalyst through turndown, urea water being added upstream of the communication passage. A mixing pipe providing a straight section of the communication passage at an intermediate portion thereof, with a double-pipe portion constituted by overlapped stretchable/retractable inner and outer pipes, the outer pipe having a terminal end secured to an outer periphery of the inner pipe and being provided with an axially expansible and contractible bellows, a sealing ring fitted over an outer periphery of a terminal end of the inner pipe.