# US 12,108,798 B2 · Multi-channel and reversed airflow mouthpiece for an aerosol-generating article > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,108,798 B2 - Document ID: US12108798B2 - Status: Granted - Kind: B2 - Application number: 17/600,744 - Filed: 2020-04-03 - Published: 2022-06-09 - Granted: 2024-10-08 - Earliest claimed: 2019-04-03 - Assignees: Philip Morris Products S.A. - Applicants: Philip Morris Products S.A. - Inventors: Rui Nuno Batista - Web page: https://patentgrep.com/patent/US12108798B2 ## CPC - A24F 40/485: Valves; Apertures - A61M 11/041: {using heaters} - A24F 7/00: Mouthpieces for pipes; Mouthpieces for cigar or cigarette holders - A24F 7/02: with detachable connecting members - A24F 40/70: Manufacture - A61M 15/0021: {Mouthpieces therefor} - A61M 15/06: Inhaling appliances shaped like cigars, cigarettes or pipes - A24D 3/17: Filters specially adapted for simulated smoking devices - A24F 40/20: Devices using solid inhalable precursors - A61M 11/042: {electrical} - A61M 11/047: {by exothermic chemical reaction} - A61M 2205/3606: cooled - A61M 2205/364: by chemical reaction - A61M 2205/3653: by Joule effect, i.e. electric resistance - A61M 2206/14: Static flow deviators in tubes disturbing laminar flow in tubes, e.g. archimedes screws - A61M 2206/20: having means for promoting or enhancing the flow, actively or passively - A61M 2207/00: Methods of manufacture, assembly or production - A24F: SMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES (inhaling appliances for medical purposes, shaped like cigars, cigarettes or pipes A61M15/06) - 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)} - A24D: CIGARS; CIGARETTES; TOBACCO SMOKE FILTERS; MOUTHPIECES OF CIGARS OR CIGARETTES; MANUFACTURE OF TOBACCO SMOKE FILTERS OR MOUTHPIECES ## Abstract The mouthpiece for an aerosol-generating article comprises a housing with an inlet end, configured to allow an aerosol to flow into the mouthpiece, an outlet end, configured to allow the aerosol to flow out of the mouthpiece, and an aerosol flow path extending between the inlet and the outlet end. The mouthpiece is formed such that the flow direction of the aerosol is reversed at least once between the inlet and the outlet end. The invention also concerns an aerosol-generating system comprising an aerosol-generating device and the mouthpiece, as well as a method for assembling the mouthpiece. ## Claims ### Claim 1 A mouthpiece for an aerosol-generating article, the mouthpiece comprising: an inlet end, configured to allow an aerosol to flow into the mouthpiece, an outlet end, configured to allow the aerosol to flow out of the mouthpiece, and an aerosol flow path extending between the inlet end and the outlet end, wherein the mouthpiece is formed such that the flow direction of the aerosol is reversed at least once between the inlet end and the outlet end, and wherein the mouthpiece is formed from an outer part and an inner part, wherein the outer part forms a central inner channel and a tubular outer wall of the mouthpiece, and wherein the inner part has a hollow tubular shape with a side wall, one open end face and one closed end face, wherein the inner part is axially inserted from the outlet end side into the outer part in such a way that the side wall of the inner part is located between the central channel and the tubular outer wall of the outer part. ### Claim 2 (depends on 1) The mouthpiece according to claim 1, wherein the inlet end of the mouthpiece comprises a connection portion configured to attach the mouthpiece to an aerosol-generating device. ### Claim 3 (depends on 1) The mouthpiece according to claim 1, wherein the aerosol flow path includes a plurality of expansion chambers. ### Claim 4 (depends on 1) The mouthpiece according to claim 1, wherein the aerosol flow path includes a plurality co-axially arranged tubular channels. ### Claim 5 (depends on 1) The mouthpiece according to claim 1, wherein the mouthpiece comprises a cavity recessed from the outlet end of the mouthpiece. ### Claim 6 (depends on 1) The mouthpiece according to claim 1, wherein the mouthpiece comprises a ring shaped outlet end. ### Claim 7 (depends on 1) The mouthpiece according to claim 1, wherein the mouthpiece comprises a central channel that extends from the inlet end and that radially diverges along the direction of the aerosol flow, and wherein the mouthpiece further comprises at least two tubular channels that are co-axially arranged with respect to the central channel and that are in fluid communication with the central channel. ### Claim 8 (depends on 4) The mouthpiece according to claim 4, wherein the aerosol flow direction is reversed between each of the consecutively arranged aerosol flow channels. ### Claim 9 (depends on 1) The mouthpiece according to claim 1, wherein the two main parts of the mouthpiece have corresponding interlocking structures that engage with each other such that a mouthpiece with predetermined dimensions is obtained. ### Claim 10 (depends on 9) The mouthpiece according to claim 9, wherein the interlocking structures comprise one or more, preferably three, fins and one or more, preferably three, intruded ring cavities that are provided at opposing surfaces of the main parts of the mouthpiece. ### Claim 11 (depends on 1) An aerosol-generating system comprising an aerosol-generating device and the mouthpiece according to claim 1. ### Claim 12 (depends on 11) The aerosol-generating system according to claim 11, wherein the aerosol-generating device and the mouthpiece comprise corresponding connection portions, such that the mouthpiece is removably attachable to the aerosol-generating device. ### Claim 13 A method for assembling a mouthpiece, comprising the steps of: (a) providing an outer part, wherein the outer part forms a central inner channel and a tubular outer wall of the mouthpiece, (b) providing an inner part, wherein the inner part has a hollow tubular shape with a side wall, one open end face and one closed end face, (c) inserting the inner part in an axial direction from the outlet end side into the outer part such that the side wall of the inner part is located between the central channel and the outer wall of the outer part.