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. 20, 1977
Filed:
Apr. 15, 1976
Charles R Durbin, Louisville, KY (US);
Bernard W Schoenbachler, Louisville, KY (US);
General Electric Company, Louisville, KY (US);
Abstract
A machine for forming a serpentine heat exchanger having a predetermined length from a continuously formed spine fin tubing. A supply of continuously formed spine fin tubing is directed to a forming and bending head in predetermined increments where it is bent in alternate directions about a central axis to form the serpentine heat exchanger. Prior to the bending action the portion to be bent is deformed into a cross section having its major axis parallel with the longitudinal axis of the tube and perpendicular to the central axis. The following bending operation causes the tube diameter across the major axis to decrease as the wall in the area of the outer curve migrates radially inwardly due to its failure to elongate sufficiently, in effect, the cross sectional area in the completed bent portion is substantially equal to the cross sectional area of the tube before the deforming and bending operation.