TAPERED HYDROPHOBIC FILTER FOR SUCTION CANISTERS

WIPO Patent Application WO2003082430

A9

The invention is drawn to a hollow cylindrical filter (10) for use with a suction canister comprising a first portion (11) having an open end (12) and a first wall thickness (t1), a second portion (13) having a closed end (14) and second wall thickness (t2) less than said first wall thickness (t1), and an elongate central chamber (15) having a substantially uniform diameter along its length. The filter (10) is composed of a composite material comprising a porous plastic material and material adapted to increase the viscosity of a liquid coming into contact therewith. The filter (10) is constructed to accommodate changes associated with air flow velocity and shear force across the filter material as the fluid level in the canister rises, and automatically shuts off the vacuum to the interior environment of the suction canister. The invention also includes a filter system comprising such a filter (10) in combination with a filter shield (30) which accommodates the filter (10) within and attaches to, or is alternatively integrated with, the underside of a suction canister lid (20).

WO/1997/041787	ABLATION APPARATUS AND SYSTEM FOR REMOVAL OF SOFT PALATE TISSUE
WO/2009/071932	DRESSING
JPH0698186	[Title of Invention] Surgical thoracic drainage device

JOHNSON BUSTER H R III (US)
HALDOPOULOS DEAN (US)

PCT/US2003/009098

June 10, 2004

March 24, 2003

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ALLEGIANCE CORP (US)
JOHNSON BUSTER H R III (US)
HALDOPOULOS DEAN (US)

A61M1/00; B01D29/33; B01D35/30; B01D46/00; B01D46/24; (IPC1-7): B01D27/00; B01D27/08; B01D29/03; B01D39/14

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