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:
Feb. 14, 1984
Filed:
Oct. 16, 1981
John J Martin, Milford, CT (US);
Avco Corporation, Stratford, CT (US);
Abstract
Plates of identical configuration are formed of relatively thin material and are assembled in stacked construction pairs, with alternating patterns of different corrugations being provided between spaced openings in each plate. Alternate plates in each stack provide corrugation patterns with transverse relationship assuring turbulence-inciting structure in both primary and secondary flow passages. Pairs of plates are formed by assembling the identical plates in back-to-back relationship to form a construction pair, with the pairs of plates being secured together by sealing only two surfaces of substantially uniform thickness of plate. The construction of the stack of plates is accomplished without necessity for provision of tubular inlet and outlet channels extending through the stack structure. The plates, being of identical configuration and construction, reduce the number of hydroform punch and dies required, facilitate continuous flow production, minimize tooling die upkeep, and minimize production halts due to die temperature-dimension changes.