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:
Nov. 09, 2010
Filed:
Nov. 16, 2007
Soji Sumi, Matsuyama, JP;
Soji Sumi, Matsuyama, JP;
Miura Co., Ltd., Ehime-Ken, JP;
Abstract
To provide a boiler equipped with a water tube group performing heat recovery effectively and having expansion heating surfaces (fins or the like) of high durability, the present invention provides a boiler () including: a boiler body () having an inner water tube group () and an outer water tube group () that are arranged in an annular fashion; and a burner () arranged at a central portion of the inner water tube group (), in which: intervals between adjacent inner water tubes constituting the inner water tube group () are closed except for portions where a gas flow passage is provided; and stud fins (and) are provided on a portion of at least one of the inner water tube group () and the outer water tube group () in a vicinity of the gas flow passage.