Structure for preventing refrigerant from leaking in heat...

Metal working – Method of mechanical manufacture – Heat exchanger or boiler making

Reexamination Certificate

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Details

C029S890030, C029S890032, C029S890052, C029S890038, C029S890045, C029S890053, C165S079000, C165S173000, C165S178000

Reexamination Certificate

active

07726025

ABSTRACT:
A refrigerant leak-preventive structure in a heat exchanger is described. The refrigerant leak-preventive structure includes a tube group having refrigerant leak-preventive grooves recessed at ends of the fin-tubes group, and headers having refrigerant leak-preventive projections formed by double injection molding solution introduced into and cooled in the refrigerant leak-preventive grooves when being coupled with the both ends of the tube group by a double injection molding.

REFERENCES:
patent: 4132264 (1979-01-01), Furlong
patent: 4386652 (1983-06-01), Dragojevic
patent: 4926933 (1990-05-01), Gray
patent: 5865244 (1999-02-01), Moser
patent: 6094816 (2000-08-01), Doshi
patent: 6180038 (2001-01-01), Cesaroni
patent: 6575232 (2003-06-01), Nakado et al.
patent: 2001/0013408 (2001-08-01), Lee et al.
patent: 2002/0088526 (2002-07-01), Lee
patent: 2004/0081777 (2004-04-01), Williams et al.
patent: 2743621 (1997-07-01), None
patent: 2785375 (2000-05-01), None
patent: 1188981 (1970-04-01), None
patent: 62-204934 (1987-09-01), None
patent: 6 3003194 (1988-01-01), None
patent: 11-277540 (1999-10-01), None
patent: 2000-146044 (2000-05-01), None
patent: 97/28953 (1997-08-01), None
English language Abstract of FR 2743621.
English language Abstract of JP 63-3194.
English language Abstract of JP 62-204934 A.
English language Abstract of JP 11-277540 A.
English language Abstract of JP 2000-146044 A.

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