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:
Nov. 09, 1982
Filed:
Jun. 08, 1981
William Melnyk, Lathrup Village, MI (US);
Ex-Cell-O Corporation, Troy, MI (US);
Abstract
A solderless crimped joint and method for forming same for a heat exchanger (10) of the type having a heat transfer core (12) including a plurality of fins (14) in parallel stacked relationship for defining heat transfer surfaces and a plurality of fluid-carrying tubes (16, 18) extending transversely through the fins (14) for defining a fluid circuit. The fluid circuit includes at least one solderless tube-to-tube joint wherein a first tube (18) includes an end having an annular outwardly extending shoulder (20) followed by an inwardly tapered open frustroconical portion (22). A second tube (16) forming the joint includes an end having an outwardly flared portion (24) in mating engagement with the frustroconical portion (22) and an inwardly extending flange (26) crimped over the shoulder (20) for forcing the tapered portion (22) into the flared portion (24). The assembly is characterized by including a plurality of raised portions (28) or gullets extending from the shoulder (20) in the direction away from the tapered frustroconical portion (22) and extending outwardly of the first tube (18) whereby the flared portion (24) is crimped into engagement about the raised portions (28) and the first tube (18) without any substantial gathering of material in the crimped flared portion (26).