Metal working – Method of mechanical manufacture – Heat exchanger or boiler making
Reexamination Certificate
2007-01-30
2010-06-01
Chang, Rick K (Department: 3726)
Metal working
Method of mechanical manufacture
Heat exchanger or boiler making
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.
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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.
Chang Rick K
LG Electronics Inc.
McKenna Long & Aldridge LLP
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