Overmolded air duct with outwardly extending main body lip

Details Overmolded air duct with outwardly extending main body lip Overmolded air duct with outwardly extending main body lip

1998-09-15

2000-10-24

Brinson, Patrick

Pipes and tubular conduits

Combined

With end structure

138155, 285331, F16L 912

Patent

active

06135158&

ABSTRACT:
An inventive air duct includes a blow molded tubular body of a first material having at least one annular open end, the open end terminating at a radially outwardly extending lip. A cuff of a second material is molded to the main body such that at least a portion of the lip is embedded within the cuff. Before molding the cuff, a portion of the main body adjacent the open end is pre-formed to remove any seams created during blow molding and to provide improved dimensional stability. Thus, leak pathways are minimized. The improved dimensional stability in combination with the use of an outwardly extending lip, a portion of which is embedded within the cuff, helps promote a strong seal between the cuff and the main body.

REFERENCES:
patent: 3323552 (1967-06-01), Whitehead, Jr.
patent: 4657285 (1987-04-01), Akiyama et al.
patent: 4865362 (1989-09-01), Holden
patent: 5443098 (1995-08-01), Kertesz
patent: 5682924 (1997-11-01), Powell

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