Disk diffuser with improved seal

Details Disk diffuser with improved seal Disk diffuser with improved seal

2007-12-31

2011-11-22

Hopkins, Robert A (Department: 1776)

Gas and liquid contact apparatus

Contact devices

Liquid tank

C261SDIG070

Reexamination Certificate

active

08061689

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.

REFERENCES:
patent: 4288394 (1981-09-01), Ewing et al.
patent: 5378355 (1995-01-01), Winkler
patent: 6464211 (2002-10-01), Downs
patent: 6811148 (2004-11-01), Frankel et al.
patent: 7311299 (2007-12-01), Sasajima
patent: 2004/0124550 (2004-07-01), Casper et al.
patent: 3829666 (1990-03-01), None
patent: 2005115929 (2005-12-01), None

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