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:
Aug. 22, 1989
Filed:
May. 02, 1988
Applicant:
Inventor:
Kenneth P Gray, Syracuse, NY (US);
Assignee:
Carrier Corporation, Syracuse, NY (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
2915 / ; 291574 ; 29523 ; 29727 ;
Abstract
A method for tension expanding a plate fin heat exchanger to provide a heat exchanger with bells of the same form and dimension and then expanding the tube into contact with the tube sheets and hairpin tubes while the bells are clamped to prevent the hairpin tubes from moving.