# US 9,907,919 B2 · Laryngeal mask head > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,907,919 B2 - Document ID: US9907919B2 - Status: Granted - Kind: B2 - Application number: 14/405,394 - Filed: 2013-05-29 - Published: 2015-04-30 - Granted: 2018-03-06 - Earliest claimed: 2012-06-04 - Assignees: Singularity AG - Applicants: Singularity AG - Inventors: Werner F. Dubach - Web page: https://patentgrep.com/patent/US9907919B2 ## CPC - A61M 16/0447: {Bell, canopy or umbrella shaped} - A61M 16/04: Tracheal tubes (catheters in general A61M25/00) - A61M 16/0409: {with mean for closing the oesophagus} - A61M 16/0816: {Joints or connectors} - 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 Especially during emergencies, there is a need for laryngeal mask heads with a ventral respiration chamber that has a cuff which surrounds the respiration chamber and which can be adjusted in size without having to be inflated. To meet said need, the laryngeal mask head comprises non-pneumatic structures to adjust the size of the mask head in the medial-lateral direction and the ventral-dorsal direction, which are preferably implemented by open, resilient channels extending in the same direction as the cuff. ## Claims ### Claim 1 A laryngeal mask head made of plastic having a cover plate positioned dorsally and a supraglottic tube connected thereto, wherein the laryngeal mask head has a cuff surrounding a ventral respiration chamber, and wherein the cuff has non-pneumatic structures for flexible size adjustment in a medial-lateral direction and a dorsal-ventral direction, and wherein the cuff comprises at least one channel running in a medial-lateral direction. ### Claim 2 (depends on 1) The laryngeal mask head according to claim 1, wherein cuff comprises at least one ventral-dorsal channel for a medial-lateral size adjustment and at least one medial-lateral channel for a ventral-dorsal size adjustment. ### Claim 3 (depends on 2) The laryngeal mask head according to claim 2, wherein the channels for size adjustment are disposed in the cuff on both sides of a central axis of the laryngeal mask head extending in a longitudinal direction of the cuff. ### Claim 4 (depends on 2) The laryngeal mask head according to claim 2, wherein each channel comprises side walls and at least one supporting member that traverses the channel at least partially, and the at least one supporting member supports the channel side walls elastically and is integrally molded thereon. ### Claim 5 (depends on 4) The laryngeal mask head according to claim 4, wherein the at least one supporting member is a supporting rib which extends upward from a bottom of the channel to a side wall with an inclination toward a channel opening. ### Claim 6 (depends on 5) The laryngeal mask head according to claim 5, wherein one supporting rib is inclined toward a lateral or ventral side wall of the channel and one supporting rib is inclined toward the medial or dorsal side wall extending upward in alternation toward the opening. ### Claim 7 (depends on 4) The laryngeal mask head according to claim 4, wherein the at least one supporting member comprises a supporting lobe crossing the channel at least 50% to 99%, from one side wall toward an opposite side wall. ### Claim 8 (depends on 7) The laryngeal mask head according to claim 7, comprising multiple supporting lobes integrally molded on one side wall and on the opposite side wall in alternation. ### Claim 9 (depends on 4) The laryngeal mask head according to claim 4, wherein the at least one supporting member comprises supporting walls which are integrally molded on both side walls and on a bottom of the channel. ### Claim 10 (depends on 9) The laryngeal mask head according to claim 9, wherein the supporting walls are straight or curved and the channel runs vertically or at an inclination to a longitudinal direction of the supporting walls. ### Claim 11 (depends on 9) The laryngeal mask head according to claim 9, wherein the supporting walls cross the direction of longitudinal extent of the channel at different angles of inclination. ### Claim 12 (depends on 4) The laryngeal mask head according to claim 4, wherein the thickness of the side walls and the supporting members is selected to achieve a desired spring strength. ### Claim 13 (depends on 3) The laryngeal mask head according to claim 3, wherein two or more channels running parallel to one another are molded on each side of the central axis of the laryngeal mask head. ### Claim 14 (depends on 2) The laryngeal mask head according to claim 2, wherein at least two channels aligned with one another penetrate the cuff in a ventral-dorsal direction. ### Claim 15 (depends on 2) The laryngeal mask head according to claim 2, wherein the channels extend in an essentially medial-lateral direction of penetration in the form of a horseshoe in a shape of the cuff, and wherein a tip of the cuff is free of channels. ### Claim 16 (depends on 15) The laryngeal mask head according to claim 15, wherein in a region in which the tube crosses the cuff, there is at least one channel present for ventral-dorsal size adjustment, and wherein at least one channel runs on each side of the cover plate for ventral-dorsal size adjustment of the cuff. ### Claim 17 (depends on 4) The laryngeal mask head according to claim 4, wherein the at least one supporting member comprises supporting walls that are S-shaped.