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:
Sep. 17, 2013
Filed:
Nov. 22, 2001
Naoki Nishikawa, Oyami, JP;
Koichiro Take, Oyami, JP;
Noboru Ogasawara, Oyama, JP;
Keihin Thermal Technology Corporation, Oyama-shi, JP;
Abstract
A heat exchanger tube (), wherein a plurality of refrigerant passages () extending in the longitudinal direction of the tube are formed in a flat tube body () with a specified length parallel with each other in the lateral direction of the tube and, where the overall cross sectional area of the tube body () is (At), the overall cross sectional area of the refrigerant passage () is (Ac), the outer peripheral length of the tube body () is (L), and the overall inner peripheral length of the refrigerant passage () is (P), set so that the relation of Ac/At×100=30 to 55 and P/L×100=150 to 325 can be established, whereby a heat exchanging performance can be increased.