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:
Jul. 24, 1990
Filed:
May. 24, 1989
Applicant:
Inventors:
William D Wright, Lyndonville, NY (US);
George K Snyder, Lockport, NY (US);
Assignee:
General Motors Corporation, Detroit, MI (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B21D / ;
U.S. Cl.
CPC ...
29890035 ; 29446 ; 29505 ; 29514 ; 29727 ; 29890046 ; 228183 ;
Abstract
Serpentine heat exchanger tubes are formed with spaces smaller than the fins which must fit in the spaces, the tubes are elastically spread apart so that tubes can be inserted, and the tubes are then allowed to contract to grip the elements for good contact and to help maintain the assembly until a brazing operation. A machine for inserting the fins has spreader blades for insertion into the tube spaces remote from the tube bends, and including sets of blades which then are moved toward the bends to fully dilate the spaces to permit easy insertion of the fins.