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. 28, 1999
Filed:
Aug. 31, 1998
Applicant:
Inventor:
Eugene D Daddis, Jr, Nedrow, NY (US);
Assignee:
Carrier Corporation, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F24H / ;
U.S. Cl.
CPC ...
1261 / ; 126 / ; 1651341 ; 165177 ; 29890053 ;
Abstract
A secondary heat exchanger suitable for use in a condensing furnace which is in the form of a bank of a plurality of metal tubes which are positioned in a plurality of stacked rows. The tubes are interconnected to form a continuous fluid flow path and have a uniform adherent corrosion resistant polymeric internal surface. The tubes further contain a longitudinal seam which is formed by crimping the edges of the tube together to provide for the compression of two polymer surfaces together thereby forming a seal capable of maintaining its integrity at conventional design pressures.