Disk diffuser with improved seal
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United States of America Patent
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Nov 22, 2011
Grant Date -
Jul 2, 2009
app pub date -
Dec 31, 2007
filing date -
Dec 31, 2007
priority date (Note) -
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Abstract
A flexible membrane disk diffuser having an improved arrangement for sealing the membrane to the diffuser body. An enlarged sealing bead on the circumference of the membrane fits in an annular channel on the diffuser body. A retainer ring threads onto the diffuser body to compress the sealing bead against a base surface of the channel. A discontinuity on the base surface provides an effective seal with the bead without requiring undue tightening force of the retainer ring. The discontinuity may take the form of a ridge or a rut on the base surface of the channel.
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