Smoke filter
AssigneeW. L. Gore & Associates, Inc.
InventorsJames A. Riedy, Ralph D. Zingle
Life of this patent
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Abstract
A smoke filter which is useful in containing smoke produced during electrosurgery or laser surgery procedures which has a prefilter layer to contain most of the smoke produced in these surgical procedures and to extend the useful life of the smoke filter, a microporous polymeric membrane layer which acts as a final filtering layer of the smoke filter and disposed between these two layers is a protective foam layer which protects the integrity of the microporous polymeric membrane from damage caused by the prefilter layer.
Claims25
A smoke filter comprising layers in the sequence of:
- a) a prefilter layer selected from the class consisting of organic nonwoven material and nonwoven glass,
- b) a protective foam layer,
- c) a microporous polymeric membrane layer.
A smoke filter housing comprising:
- a) a housing having an inlet and an outlet;
- b) a smoke filter comprising layers in the sequence of:
- i) a prefilter layer,
- ii) a protective foam layer,
- iii) a microporous polymeric membrane layer, and;
- c) a means of sealing said smoke filter between said inlet and said outlet of said housing.
Dependencies are inferred from the claim text.