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:
Apr. 09, 2019
Filed:
Feb. 26, 2016
Rinnai Corporation, Nagoya-shi, Aichi, JP;
Hideo Okamoto, Nagoya, JP;
Akifumi Nishino, Nagoya, JP;
Rinnai Corporation, Nagoya-shi, JP;
Abstract
A heat transfer fin () made of stainless steel-based metal for a heat exchanger, has a plurality of upper stage heat-transfer-tube insertion holes (), a plurality of lower stage heat-transfer-tube insertion holes formed (), upper end cut portions () formed between the adjacent upper stage heat-transfer-tube insertion holes (), and lower end cut portions () formed between the adjacent lower stage heat-transfer-tube insertion holes (), wherein the upper end cut portions () are formed so as to extend from a fin upper end portion () beyond lower ends of the upper stage heat-transfer-tube insertion holes () to positions in the vicinity of upper ends of the lower stage heat-transfer-tube insertion holes (), and the lower end cut portions () are formed so as to extend from a fin lower end portion () to positions above the lower ends of the lower stage heat-transfer-tube insertion holes ().