Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Keiji Maezawa0
Takayuki Kume0
Date of Patent
August 21, 2007
0Patent Application Number
111773210
Date Filed
July 11, 2005
0Patent Primary Examiner
Patent abstract
A heat exchanger includes a plurality of flat tubes. The flat tubes have a pair of tube sheets facing each other and joined together. The tube sheets have a flat part, a recess part, and a cylindrical tank. The tube sheet is one of a first tube sheet and a second tube sheet. The first tube sheet has a first type of tank. The second tube sheet has the first type of tank and a second type of tank. Identifiers are provided at each end of the second tube sheet. The identifiers distinguishing the second tube sheet from the first tube sheet when viewed from externally of the stacked flat tubes. A mark provided at one of the identifiers of the second tube sheet.
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