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. 02, 2008
Filed:
Dec. 16, 2005
Nobuhiro Takeda, Hyogo, JP;
Hiroshi Asakura, Hyogo, JP;
Akira Tsutsumi, Hyogo, JP;
Kazuhiro Kimura, Hyogo, JP;
Shuji Kameyama, Hyogo, JP;
Keiichi Amada, Hyogo, JP;
Hironao Matsunaga, Hyogo, JP;
Nobuhiro Takeda, Hyogo, JP;
Hiroshi Asakura, Hyogo, JP;
Akira Tsutsumi, Hyogo, JP;
Kazuhiro Kimura, Hyogo, JP;
Shuji Kameyama, Hyogo, JP;
Keiichi Amada, Hyogo, JP;
Hironao Matsunaga, Hyogo, JP;
Noritz Corporation, Hyogo, JP;
Abstract
A secondary heat exchanger B for recovering latent heat from combustion gas includes water tubeseach of which is so inclined that a first endis positioned lower than a second end. Therefore, in draining water from each of the water tubes, water can be caused to flow smoothly into a water-inflow and hot-water-outflow headerA connected to the first ends. The secondary heat exchanger B includes a casingwhich includes an upper walland a bottom wallwhich are so inclined that the inner surfaces thereof extend generally in parallel with the water tubes, and the upper and the lower gapsandhave constant widths sand s. Therefore, the amount of heat recovery from the combustion gas passing through the gapsandcan be increased.