# US 8,539,953 B2 · Combination anesthesia and scavenger surgical mask > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,539,953 B2 - Document ID: US8539953B2 - Status: Granted - Kind: B2 - Application number: 12/540,082 - Filed: 2009-08-12 - Published: 2010-05-20 - Granted: 2013-09-24 - Earliest claimed: 2008-11-19 - Applicants: John E. Moenning, Jr. - Inventors: John E. Moenning, Jr. - Web page: https://patentgrep.com/patent/US8539953B2 ## CPC - 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 16/0816: {Joints or connectors} - A61M 16/104: {specially adapted for anaesthetics (A61M16/18 takes precedence)} - A61M 16/12: by mixing different gases - A61M 16/0875: {Connecting tubes} - A61M 16/1055: {bacterial} - A61M 16/1065: {in the expiratory path} - A61M 16/107: {in the inspiratory path} - 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 A surgical mask for administering and/or scavenging medical gases includes a nasal mask and an oral mask that envelops the nasal mask. The nasal mask is secured to the oral mask and may be removable from it. ## Claims ### Claim 1 A surgical mask assembly for administering and scavenging medical gases, comprising: an outer shell having a first gas port configured to be coupled to a negative pressure source such that gas is exhausted from the outer shell to the negative pressure source through the first gas port, the outer shell defining a chamber with a rear-facing opening defined by a rim, the rim having an inner edge and an outer edge, and an inner shell having a second gas port that includes (i) a distal end configured to be coupled to a positive pressure source, and (ii) a proximal end that opens into the chamber of the inner shell such that gas from the positive pressure source is advanced through second gas port and out of the chamber of the inner shell to exit the inner shell, the inner shell defining a chamber with a rear-facing opening defined by a rim, the rim having an inner edge and an outer edge, wherein a superior-most point of the inner edge of the rim of the inner shell is positioned inferiorly and anteriorly relative to a superior-most point of the inner edge of the rim of the outer shell. ### Claim 2 (depends on 1) The surgical mask assembly of claim 1, wherein the entire inner shell is located in the chamber of the outer shell. ### Claim 3 (depends on 1) The surgical mask assembly of claim 1, further comprising a flexible seal secured to the rim of the inner shell, wherein the flexible seal is located in the chamber of the outer shell. ### Claim 4 (depends on 1) The surgical mask assembly of claim 1, wherein: the outer shell envelops a patient's nose and mouth when the surgical mask assembly is positioned on the face of the patient, and the inner shell envelops the patient's nose when the surgical mask assembly is positioned on the face of the patient. ### Claim 5 (depends on 1) The surgical mask assembly of claim 1, further comprising: a flexible seal secured to the rim of the inner shell, and a flexible seal secured to the rim of the outer shell. ### Claim 6 (depends on 1) The surgical mask of claim 1, wherein: the second gas port of the inner shell comprises a first tube, the first gas port of the outer shell comprises a second tube, and the first tube is positioned within the second tube. ### Claim 7 A surgical mask assembly for administering and scavenging medical gases, comprising: an oral mask configured to envelop a patient's nose and mouth when the surgical mask assembly is positioned on the face of the patient, the oral mask having (i) a shell which defines a chamber with a rear-facing opening defined by a rim, the rim having an inner edge and an outer edge, and (ii) a first gas port configured to be coupled to a negative pressure source such that gas is exhausted from the outer shell to the negative pressure source through the first gas port, and a nasal mask configured to envelop the patient's nose when the surgical mask assembly is positioned on the face of the patient, the nasal mask having (i) a shell which defines a chamber with a rear-facing opening defined by a rim, the rim having an inner edge and an outer edge, and (ii) a second gas port that includes (i) a distal end configured to be coupled to a positive pressure source, and (ii) a proximal end that opens into the chamber of the oral mask such that gas from the positive pressure source is advanced through second gas port and out of the chamber of the nasal mask to exit the nasal mask, wherein a superior-most point of the inner edge of the rim of the shell of the nasal mask is positioned inferiorly and anteriorly relative to a superior-most point of the inner edge of the rim of the shell of the oral mask. ### Claim 8 (depends on 7) The surgical mask assembly of claim 7, wherein the entire nasal mask is located in the chamber of the shell of the oral mask. ### Claim 9 (depends on 7) The surgical mask assembly of claim 7, further comprising a flexible seal secured to the rim of the shell of the nasal mask, wherein the flexible seal is located in the chamber of the shell of the oral mask. ### Claim 10 (depends on 7) The surgical mask assembly of claim 7, further comprising: a flexible seal secured to the rim of the shell of the nasal mask, and a flexible seal secured to the rim of the shell of the oral mask. ### Claim 11 (depends on 7) The surgical mask of claim 7, wherein: the second gas port of the nasal mask comprises a first tube, the first gas port of the oral shell comprises a second tube, and the first tube is positioned within the second tube. ### Claim 12 A surgical mask assembly for administering and scavenging medical gases, comprising: an outer shell having a first gas port configured to be coupled to a negative pressure source such that gas is exhausted from the outer shell to the negative pressure source through the first gas port, the outer shell defining a chamber with a rear-facing opening defined by a rim, the rear-facing opening defining an imaginary bounded plane, and an inner shell having a second gas port that includes (i) a distal end configured to be coupled to a positive pressure source, and (ii) a proximal end that opens into the chamber of the inner shell such that gas from the positive pressure source is advanced through second gas port and out of the chamber of the inner shell to exit the inner shell, the inner shell defining a chamber with a rear-facing opening defined by a rim, the rear-facing opening defining an imaginary bounded plane, wherein the imaginary bounded plane defined by the rear-facing opening of the inner shell is spaced apart from, and positioned anteriorly relative to, the imaginary bounded plane defined by the rear-facing opening of the outer shell. ### Claim 13 (depends on 12) The surgical mask assembly of claim 12, wherein the entire inner shell is located in the chamber of the outer shell. ### Claim 14 (depends on 12) The surgical mask assembly of claim 12, further comprising a flexible seal secured to the rim of the inner shell, wherein the flexible seal is located in the chamber of the outer shell. ### Claim 15 (depends on 12) The surgical mask assembly of claim 12, wherein: the outer shell envelops a patient's nose and mouth when the surgical mask assembly is positioned on the face of the patient, and the inner shell envelops the patient's nose when the surgical mask assembly is positioned on the face of the patient. ### Claim 16 (depends on 12) The surgical mask assembly of claim 12, further comprising: a flexible seal secured to the rim of the inner shell, and a flexible seal secured to the rim of the outer shell. ### Claim 17 (depends on 12) The surgical mask of claim 12, wherein: the second gas port of the inner shell comprises a first tube, the first gas port of the outer shell comprises a second tube, and the first tube is positioned within the second tube. ### Claim 18 A surgical mask assembly for administering and scavenging medical gases, comprising: an oral mask configured to envelop a patient's nose and mouth when the surgical mask assembly is positioned on the face of the patient, the oral mask having (i) a shell which defines a chamber with a rear-facing opening defined by a rim, the rear-facing opening defining an imaginary bounded plane, and (ii) a first gas port configured to be coupled to a negative pressure source such that gas is exhausted from the outer shell to the negative pressure source through the first gas port, and a nasal mask configured to envelop the patient's nose when the surgical mask assembly is positioned on the face of the patient, the nasal mask having (i) a shell which defines a chamber with a rear-facing opening defined by a rim, the rear-facing opening defining an imaginary bounded plane, and (ii) a second gas port that includes (i) a distal end configured to be coupled to a positive pressure source, and (ii) a proximal end that opens into the chamber of the oral mask such that gas from the positive pressure source is advanced through second gas port and out of the chamber of the nasal mask to exit the nasal mask, wherein the imaginary bounded plane defined by the rear-facing opening of the shell of the nasal mask is spaced apart from, and positioned anteriorly relative to, the imaginary bounded plane defined by the rear-facing opening of the shell of the oral mask. ### Claim 19 (depends on 18) The surgical mask assembly of claim 18, wherein the entire nasal mask is located in the chamber of the shell of the oral mask. ### Claim 20 (depends on 18) The surgical mask assembly of claim 18, further comprising a flexible seal secured to the rim of the shell of the nasal mask, wherein the flexible seal is located in the chamber of the shell of the oral mask. ### Claim 21 (depends on 18) The surgical mask assembly of claim 18, further comprising: a flexible seal secured to the rim of the shell of the nasal mask, and a flexible seal secured to the rim of the shell of the oral mask. ### Claim 22 (depends on 18) The surgical mask of claim 18, wherein: the second gas port of the nasal mask comprises a first tube, the first gas port of the oral shell comprises a second tube, and the first tube is positioned within the second tube.