# US 12,213,861 B2 · Small animal anesthetization gas mask with integrated valve function > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,213,861 B2 - Document ID: US12213861B2 - Status: Granted - Kind: B2 - Application number: 18/158,456 - Filed: 2023-01-23 - Published: 2023-07-27 - Granted: 2025-02-04 - Earliest claimed: 2022-01-25 - Assignees: Bruker Belgium N.V. - Applicants: Bruker Belgium N.V. - Inventors: Timothy Claessens - Web page: https://patentgrep.com/patent/US12213861B2 ## CPC - A61D 7/04: Devices for anaesthetising animals by gases or vapours; Inhaling devices - A61M 16/01: specially adapted for anaesthetising {(A61M16/104, A61M16/18 take precedence)} - A61M 16/009: {Removing used or expired gases or anaesthetic vapours (filtering, sterilising or disinfecting the exhaust air in drainage systems A61M1/784; bacterial filters in the expiratory path A61M16/1065)} - A61M 16/06: Respiratory or anaesthetic masks - A61M 16/201: {Controlled valves} - A61M 2250/00: Specially adapted for animals - A61D: VETERINARY INSTRUMENTS, IMPLEMENTS, TOOLS, OR METHODS - 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)} ## Abstract An anesthetization gas mask for a small animal includes a first mask part providing an inlet for an anesthetization gas and a second mask part for transmitting the anesthetization gas. The first and the second mask part define an anesthetization volume for receiving an animal's mouth part. The second mask part transmitting the anesthetization gas is movably connected to the first mask part having the inlet for an anesthetization gas. The anesthetization gas mask is geometrically constructed such that a movement of the first mask part from a working position to a blocking position relative to the second mask part blocks the passage of anesthetization gas into the anesthetization volume. This anesthetization gas mask has a valve function integrated in the mask system itself, so that anesthesia gas is not spilled when not in use and with a fixed geometry so that the extraction is always present when handled. ## Claims ### Claim 1 An anesthetization gas mask for a small animal, comprising: a first mask part providing an inlet for an anesthetization gas; a second mask part for transmitting the anesthetization gas being mechanically connected to the first mask part; wherein the first and the second mask part at least partially define an anesthetization volume for receiving a mouth part of the small animal; wherein the second mask part for transmitting the anesthetization gas is movably connected to the first mask part, the first mask part manually movable by a user back and forth relative to the second mask part between a working position and a blocking position; wherein the first mask part and the second mask part cooperatively form a valve, the valve configured to either block or transmit the anesthetization gas flowing in either direction between the inlet and the anesthetization volume depending on whether the first mask part and the second mask part are in the working position or the blocking position; and wherein the anesthetization gas mask is geometrically constructed and configured wherein a movement operated manually of the first mask part by the user from the working position to the blocking position relative to the second mask part blocks the passage of anesthetization gas through the valve into the anesthetization volume. ### Claim 2 (depends on 1) The anesthetization gas mask according to claim 1, wherein the anesthetization gas mask is geometrically constructed and configured wherein the movement of the first mask part by the user from the working position to the blocking position relative to the second mask part is a rotation. ### Claim 3 (depends on 2) The anesthetization gas mask according to claim 2, wherein the first mask part has a conical or cylindrical end and the second mask part has a conical or cylindrical receptacle configured for receiving the conical or cylindrical end of the first mask part. ### Claim 4 (depends on 1) The anesthetization gas mask according to claim 1, wherein the anesthetization gas mask is geometrically constructed and configured wherein the movement of the first mask part by the user from the working position to the blocking position relative to the second mask part is a translation. ### Claim 5 (depends on 4) The anesthetization gas mask according to claim 4, wherein the first mask part has a cuboid or prism-shaped end and the second mask part has a cuboid or prism-shaped receptacle for receiving the cuboid or prism-shaped end of the first mask part. ### Claim 6 (depends on 1) The anesthetization gas mask according to claim 1, wherein the inlet of the first mask part for the anesthetization gas is divided into several inlet channels and the second mask part has several first transmission channels configured for transferring the anesthetization gas, the respective channels each forming a common passage in the working position and being blocked against each other in the blocking position. ### Claim 7 (depends on 6) The anesthetization gas mask according to claim 6, wherein the inlet channels and the first transmission channels are arranged in a semicircular shape within the respective mask part. ### Claim 8 (depends on 1) The anesthetization gas mask according to claim 1, wherein the first mask part has an outlet for waste gas and the second mask part has second transmission channels for transmission of waste gas to the outlet of the first mask part. ### Claim 9 (depends on 8) The anesthetization gas mask according to claim 8, wherein the outlet of the first mask part splits into several outlet channels each forming a common passage together with the respective second transmission channels of the second mask part in the working position as well as in the blocking position. ### Claim 10 (depends on 9) The anesthetization gas mask according to claim 9, wherein the outlet channels of the first mask part and the second transmission channels of the second mask part form a circular shape in the respective mask part. ### Claim 11 (depends on 8) The anesthetization gas mask according to claim 8, wherein the outlet of the first mask part splits into several outlet channels each forming a common passage together with the respective second transmission channels of the second mask part in the working position and being blocked against each other in the blocking position. ### Claim 12 (depends on 11) The anesthetization gas mask according to claim 11, wherein the outlet channels of the first mask part and the second transmission channels of the second mask part form a circular shape in the respective mask part. ### Claim 13 (depends on 1) The anesthetization gas mask according to claim 1, wherein the anesthetization gas mask comprises a third mask part having an opening for receiving a mouth part of the small animal and being fixable to the second mask part. ### Claim 14 (depends on 13) The anesthetization gas mask according to claim 13, wherein the third mask part is made of an elastic material. ### Claim 15 (depends on 14) The anesthetization gas mask according to claim 14, wherein the elastic material of the third mask part is rubber. ### Claim 16 (depends on 13) The anesthetization gas mask according to claim 13, wherein the third mask part has a slanted shape in the area of the opening. ### Claim 17 (depends on 1) The anesthetization gas mask according to claim 1, wherein the second mask part has an opening configured for directly receiving a mouth part of the small animal and a slanted shape in the area of that opening.