Heat dissipation system and anti-backflow device
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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N/A
Issued Date -
Jan 4, 2007
app pub date -
Jun 6, 2006
filing date -
Jun 30, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An anti-backflow device includes a case and a plurality of flappers. The case has at least one opening and a plurality of combining portion. The combining portions are disposed in two opposite sides of the opening. The combining portions and the case are integrally formed. The flappers are disposed in the opening in sequence. Each flapper has a first connecting portion and a second connecting portion, each of which pivots on one of the combining portions.
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