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1. A FILTER COMPRISING A TUBULAR HOUSING HAVING A SIDEWALL AND AN OPEN END, A FILTER HOLDER OF FLEXIBLE, RESILIENT, SOLID, POLYMERIC MATERIAL HAVING A TUBULAR PORTION WITHIN SAID HOUSING AND AN INTEGRAL FIANGE PORTION EXTENDING OUTWARDLY OVER SAID END AND DOWNWARDLY ALONG SAID SIDEWALL, EACH SURFACE OF SAID FLANGES PORTION HAVING A PLURALITY OF CIRCUMFERENTIAL GROOVES, A SELF-SUPPORTING CORRUGATED FILTER MEDIA ADHESIVELY SEALED TO SAID TUBULAR PORTION, A
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1. A FILTER COMPRISING A TUBULAR HOUSING HAVING A SIDEWALL AND AN OPEN END, A FILTER HOLDER OF FLEXIBLE, RESILIENT, SOLID, POLYMERIC MATERIAL HAVING A TUBULAR PORTION WITHIN SAID HOUSING AND AN INTEGRAL FIANGE PORTION EXTENDING OUTWARDLY OVER SAID END AND DOWNWARDLY ALONG SAID SIDEWALL, EACH SURFACE OF SAID FLANGES PORTION HAVING A PLURALITY OF CIRCUMFERENTIAL GROOVES, A SELF-SUPPORTING CORRUGATED FILTER MEDIA ADHESIVELY SEALED TO SAID TUBULAR PORTION, A
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Current AssigneeHelmut F. Schumann
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Original AssigneeHelmut F. Schumann
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InventorsSchumann, Helmut F.
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Application NumberUS04/410,174Time in Patent Office791 DaysField of SearchUS Class Current55/497CPC Class CodesA62B 23/00 Filters for breathing-prote...
