Heat exchanger construction and method

Heat exchange – Side-by-side tubular structures or tube sections – With manifold type header or header plate

Reexamination Certificate

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Details

C165S175000, C165S178000

Reexamination Certificate

active

06971444

ABSTRACT:
A heat exchanger construction (10) including a plurality of flat heat exchanger tubes (12) and a tube plate (18). The tube plate (18) has an exterior side (20), an interior side (22), and a plurality of tube openings (24) spaced along a longitudinal axis (26). Each of the tubes (12) includes a pair of opposed long sides (29) and a pair of opposed short sides (30). Each of the tubes (12) has an end (34) received in one of the tube openings (24) and extending past the interior side (22). Each of the ends (34) includes a pair of long edges (36) defined by the long sides (28). Each of the tubes (12) has a cut (38) in each of its short sides (30) extending from the end (34) to adjacent the interior side (22) of the tube plate (18). Each of the tubes further includes a bend (40) formed in each of the long sides (28) of the tube (12) adjacent the cut (38) so that the long edges (36) of the tube (12) are adjacent the long edges (36) of the tube (12) on either side of the tube (12).

REFERENCES:
patent: 3589440 (1971-06-01), Friedrich
patent: 3972371 (1976-08-01), Plegat
patent: 4513811 (1985-04-01), Lesniak
patent: 4813112 (1989-03-01), Pilliez
patent: 5067235 (1991-11-01), Kato et al.
patent: 5457885 (1995-10-01), Ohashi et al.
patent: 5762133 (1998-06-01), Dion
patent: 694 02 786 (1997-07-01), None
patent: 197 57 034 (1999-06-01), None
patent: 697 00 090 (1999-06-01), None
patent: 05157488 (1993-06-01), None

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