BARRIER FILTER AND METHOD FOR MANUFACTURING THE SAME
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United States of America Patent
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Issued Date -
Aug 14, 2008
app pub date -
Feb 11, 2008
filing date -
Feb 9, 2007
priority date (Note) -
Abandoned
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Abstract
To provide a barrier filter in which a filter element does not peel from a holding frame. A barrier filter has a cylindrical outline and includes holding frame 1 and filter element 40 arranged on a circumference surface, in which holding frame 1 includes small diameter frame 2 forming one end axially, ring-shaped large diameter frame 10 forming the other end, and circumference frame 20 inclined radially in the circumference surface, for linking small and large diameter frames 2 and 10. On an inner surface of large diameter frame 10, thick-walled portion 15 inclined inward to an inclined circumference surface is formed, the filter element is rounded and formed hollow in a truncated cone shape, an upper end edge portion thereof is inserted into small diameter frame 2 and a lower end edge portion is inserted into large diameter frame 10 outside thick-walled portion 15 to hold the filter element.
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