# US 2014/0155847 A1 · Suction Canister Having A Replaceable Filter Cartridge > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155847 A1 - Document ID: US20140155847A1 - Status: Published application - Kind: A1 - Application number: 13/692,041 - Filed: 2012-12-03 - Published: 2014-06-05 - Earliest claimed: 2012-12-03 - Assignees: Devilbiss Healthcare LLC - Applicants: Devilbiss Healthcare LLC - Inventors: Joel David Neatrour; Matt Smith - Web page: https://patentgrep.com/patent/US20140155847A1 ## CPC - A61M 1/782: {using valves with freely moving parts, e.g. float valves} - A61M 1/60: {Containers for suction drainage, adapted to be used with an external suction source (containers not adapted for subjection to vacuum A61M1/69)} - A61M 1/784: {by filtering, sterilising or disinfecting the exhaust air, e.g. swellable filter valves} - A61M 1/79: {Filters for solid matter (specially adapted for dental use A61C17/065)} - B01D 35/027: rigidly mounted in or on tanks or reservoirs (B01D35/04 takes precedence) - B65D 43/02: Removable lids or covers (with means for piercing, cutting, or tearing a frangible inner closure B65D51/22) - B65D 47/04: Closures with discharging devices other than pumps - A61M 2205/16: with back-up system in case of failure - B01D 2201/16: Valves - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - B01D: SEPARATION (separating solids from solids by wet methods B03B, B03D; by pneumatic jigs or tables B03B; by other dry methods B07; magnetic or electrostatic separation of solid materials from solid materials or fluids, separation by high-voltage electric fields B03C; centrifuges, vortex apparatus B04; presses per se for squeezing-out liquid from liquid-containing material B30B9/02; treatment of water C02F, e.g. softening by ion-exchange C02F1/42; {arrangements of air intake cleaners in gas turbine plants F02C7/05} ; arrangements or mounting of filters in air-conditioning, air-humidification or ventilation F24F13/28) - B65D: CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES ## Abstract A canister assembly for use with a medical suction or aspiration device having a ball float assembly defined in the lid. The lid accepts a replaceable filter cartridge containing a filter element. The ball float engages the replaceable filter cartridge when the canister is near full. ## Claims ### Claim 1 A lid assembly for a suction canister comprising: a lid body, having a lip defined therein for engagement with a canister; a hollow cylindrical structure, having a top portion extending above a top surface of said lid and a bottom portion extending below a bottom surface of said lid, such that said bottom portion of said cylindrical structure will contact fluid collected in a canister to which it is attached when the canister is nearly full; a bottom wall, covering all or a portion of the open end of said bottom portion of said cylindrical structure; one or more slots, defined in the bottom portion of said cylindrical structure, allowing fluid communication with the canister; and one or more tabs, defined in bottom portion of said cylindrical structure, said tabs extending into the interior of said cylindrical structure at said one or more slots. ### Claim 2 (depends on 1) The lid assembly of claim 1 wherein said lid body defines an orifice therein allowing fluid communication between a fluid collection device and the interior of the canister. ### Claim 3 (depends on 1) The lid assembly of claim 1 wherein all elements of said lid assembly are composed of a high density polyethylene. ### Claim 4 (depends on 1) The lid assembly of claim 1 further comprising: a ball float, disposed on the interior of said cylindrical structure between said bottom wall and said one or more tabs, such that said ball float can move within the interior of said cylindrical structure between said bottom wall and said one or more tabs. ### Claim 5 (depends on 4) The lid assembly of claim 4 wherein said ball float is composed of polypropylene. ### Claim 6 (depends on 1) The lid assembly of claim 1 further comprising: a filter cartridge, disposed in said cylindrical structure. ### Claim 7 The lid assembly wherein said filter cartridge comprises: a cylindrical body having a first diameter smaller than the diameter of the top portion of said cylindrical structure of said lid; a cap having a second diameter larger than the diameter of the top portion of said cylindrical structure; and a tube, extending through said cap, allowing fluid communication between the interior of said filter cartridge and the exterior of said filter cartridge, for connection to a vacuum source. ### Claim 8 (depends on 7) The lid assembly of claim 7 wherein said cylindrical; body and said cap form a space therebetween for acceptance of the top portion of said cylindrical structure; ### Claim 9 (depends on 8) The lid assembly of claim 8 wherein said filter cartridge is held on the top portion of said cylindrical structure by a friction fit. ### Claim 10 (depends on 8) The lid assembly of claim 8 where the cross sectional diameter of said cylindrical body is less than the diameter of said ball float. ### Claim 11 (depends on 7) The lid assembly of claim 7 wherein said filter cartridge is composed of a low density polyethylene. ### Claim 12 (depends on 7) The lid assembly of claim 7 further comprising a filter element, disposed in said cylindrical body, said filter element engaging said tube. ### Claim 13 (depends on 13) The lid assembly of claim 13 wherein said filter element acts is composed of a material exhibiting hydrophilic or hygroscopic properties. ### Claim 14 A filter cartridge comprising: a cylindrical body having a first diameter; a cap disposed at one end of said cylindrical body, said cap having a second diameter larger than said first diameter, wherein said cap and said cylindrical body form a space therebetween; and a tube, extending through said cap, allowing fluid communication between the interior of said filter cartridge and the exterior of said filter cartridge, for connection to a vacuum source. ### Claim 15 (depends on 14) The filter cartridge of claim 14 wherein said filter cartridge is composed of a low density polyethylene. ### Claim 16 (depends on 14) The filter cartridge of claim 14 further comprising a cylindrically-shaped filter element, disposed within said filter cartridge and engaging the end of said tube extending into the interior of said filter cartridge. ### Claim 17 (depends on 16) The filter cartridge of claim 16 wherein said filter element acts is composed of a material exhibiting hydrophilic or hygroscopic properties. ### Claim 18 (depends on 14) The filter cartridge of claim 14 further comprising one of more longitudinal ridges defined on the interior wall of said cylindrical body for engaging a filter element inserted into the interior of said filter cartridge. ### Claim 19 (depends on 14) The filter cartridge of claim 14, wherein the end of the cylindrical body opposite said cap is flexible.