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:
Dec. 10, 2002
Filed:
Nov. 30, 2001
Kenji Yamamoto, Hitachinaka, JP;
Hironobu Kobayashi, Hitachi, JP;
Hirofumi Okazaki, Hitachi, JP;
Toshikazu Tsumura, Kure, JP;
Kenji Kiyama, Kure, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
The invention provides a boiler provided with low cost means which can reduce a concentration of CO, an unburned matter, an attached ash and the like near a side wall and maintain a combustion state well with a simple structure. In a boiler having a combustion chamber formed by front and rear walls (burner walls) provided with a plural stages of burners and on at least one of them and opposing to each other, and side walls and crossing to said burner walls and , a gas port containing no fuel for making a pressure of a gas near said side walls and within said combustion chamber higher than a pressure of a gas at a center portion of said combustion chamber is provided between an outermost burner and the side walls and within a range of a height of said burner stages and . A combustion gas can not come close to the side walls and due to the jet of the gas.