# US 11,998,723 B2 · Vented syringe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,998,723 B2 - Document ID: US11998723B2 - Status: Granted - Kind: B2 - Application number: 16/286,382 - Filed: 2019-02-26 - Published: 2020-08-27 - Granted: 2024-06-04 - Earliest claimed: 2019-02-26 - Assignees: Becton, Dickinson and Company - Applicants: Becton, Dickinson and Company - Inventors: Raymond Feith; Christopher Zollinger; George Mansour; Edmond Yu; Tomas Frausto; Ryan Callahan - Web page: https://patentgrep.com/patent/US11998723B2 ## CPC - A61M 5/31: Details - A61M 5/3148: {Means for causing or aiding aspiration or plunger retraction} - A61J 1/2096: {Combination of a vial and a syringe for transferring or mixing their contents} - A61M 5/1782: {Devices aiding filling of syringes in situ (combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003)} - A61M 5/3145: {Filters incorporated in syringes} - A61M 5/3221: {Constructional features thereof, e.g. to improve manipulation or functioning} - A61J 1/2068: {Venting means} - A61M 5/3158: {the component being manually operated or triggered by an axially moving actuator operated by user, e.g. an axially movable injection button} - A61M 2005/3101: {Leak prevention means for proximal end of syringes, i.e. syringe end opposite to needle mounting end} - A61M 2005/3121: {via the proximal end of a syringe, i.e. syringe end opposite to needle cannula mounting end} - A61M 2005/3123: {having air entrapping or venting means, e.g. purging channels in pistons} - A61M 2005/3128: {Incorporating one-way valves, e.g. pressure-relief or non-return 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)} - A61J: CONTAINERS SPECIALLY ADAPTED FOR MEDICAL OR PHARMACEUTICAL PURPOSES; DEVICES OR METHODS SPECIALLY ADAPTED FOR BRINGING PHARMACEUTICAL PRODUCTS INTO PARTICULAR PHYSICAL OR ADMINISTERING FORMS; DEVICES FOR ADMINISTERING FOOD OR MEDICINES ORALLY; BABY COMFORTERS; DEVICES FOR RECEIVING SPITTLE ## Abstract Vented syringes are described herein. A vented syringe includes a syringe body and a plunger body. The syringe body defines a syringe cavity. The plunger body is at least partially disposed within the syringe cavity. The plunger body includes an air intake channel defined within the plunger body. The vented syringe further includes a plunger seal that is sealingly engaged with the syringe cavity to cooperatively define a syringe volume. The vented syringe further includes a one-way valve in fluid communication with the air intake channel and the syringe volume, wherein the one-way valve is configured to prevent fluid flow from the syringe volume to the air intake channel and permit fluid flow from the air intake channel to the syringe volume. ## Claims ### Claim 1 A vented syringe, comprising: a syringe body defining a syringe cavity; a plunger body disposed at least partially within the syringe cavity, wherein the plunger body extends continuously between a first end and a second end, the plunger body comprising: an air intake channel defined within the plunger body and extending continuously between the first end and the second end of the continuous plunger body; and a thumb pad disposed at the first end of the plunger body; a filter disposed inwardly adjacent to the thumb pad at the first end of the plunger body and in fluid communication with the air intake channel; a plunger seal disposed at the second end of the plunger body and sealingly engaged with the syringe cavity, wherein the plunger body is stationary relative to the plunger seal; and a one-way valve disposed at the second end of the plunger body, wherein the one-way valve, the plunger seal, and the syringe cavity cooperatively define a syringe volume within the syringe cavity, the one-way valve is in fluid communication with the air intake channel and the syringe volume, and the one-way valve is configured to prevent fluid flow from the syringe volume to the air intake channel and permit fluid flow from the air intake channel to the syringe volume. ### Claim 2 (depends on 1) The vented syringe of claim 1, wherein the syringe body further comprises an aperture in fluid communication with the syringe volume. ### Claim 3 (depends on 1) The vented syringe of claim 1, wherein the plunger body is slidable relative to the syringe body. ### Claim 4 (depends on 1) The vented syringe of claim 1, wherein the plunger body further comprises a cap removably engaged with the air intake channel at the first end of the plunger body. ### Claim 5 (depends on 4) The vented syringe of claim 4, wherein the cap is configured to prevent fluid flow to the air intake channel when engaged with the air intake channel. ### Claim 6 (depends on 4) The vented syringe of claim 4, wherein the plunger body further comprises a cap receptacle to releasably engage the cap. ### Claim 7 (depends on 4) The vented syringe of claim 4, wherein the filter is positioned between the cap and the second end of the plunger body. ### Claim 8 (depends on 1) The vented syringe of claim 1, wherein the one-way valve is configured to collapse to prevent fluid flow from the syringe volume to the air intake channel. ### Claim 9 (depends on 1) The vented syringe of claim 1, wherein the one-way valve comprises a duckbill valve. ### Claim 10 (depends on 1) The vented syringe of claim 1, wherein the one-way valve is integrally formed with the plunger seal. ### Claim 11 (depends on 1) The vented syringe of claim 1, wherein the plunger seal is disposed around a portion of the second end of the plunger body. ### Claim 12 (depends on 1) The vented syringe of claim 1, wherein the plunger seal is disposed around a portion of the air intake channel. ### Claim 13 (depends on 1) The vented syringe of claim 1, wherein the one-way valve is configured to prevent liquid within the air intake channel and permit air flow from the air intake channel to the syringe volume. ### Claim 14 A vented syringe, comprising: a syringe body defining a syringe cavity; a plunger body disposed at least partially within the syringe cavity, wherein the plunger body extends continuously between a first end and a second end, the plunger body comprising: an air intake channel defined within the plunger body and extending continuously between the first end and the second end of the continuous plunger body; and a thumb pad disposed at the first end of the plunger body; a filter disposed inwardly adjacent to the thumb pad at the first end of the plunger body and in fluid communication with the air intake channel; a plunger seal disposed at the second end of the plunger body and sealingly engaged with the syringe cavity, wherein the plunger body is stationary relative to the plunger seal; and a one-way valve disposed at the second end of the plunger body, wherein the one-way valve, the plunger seal, and the syringe cavity cooperatively define a syringe volume within the syringe cavity and expansion of the syringe volume provides a vacuum within the syringe volume, the one-way valve is in fluid communication with the air intake channel and the syringe volume, wherein the one-way valve is configured to prevent fluid flow into the air intake channel during expansion of the syringe volume and permit fluid flow from the air intake channel to the syringe volume to release the vacuum within the syringe volume. ### Claim 15 (depends on 14) The vented syringe of claim 14, wherein the plunger body is slidable relative to the syringe body. ### Claim 16 (depends on 14) The vented syringe of claim 14, wherein the plunger body further comprises a cap removably engaged with the air intake channel at the first end of the plunger body. ### Claim 17 (depends on 16) The vented syringe of claim 16, wherein the cap is configured to prevent fluid flow to the air intake channel when engaged with the air intake channel. ### Claim 18 (depends on 14) The vented syringe of claim 14, wherein the plunger seal is disposed around a portion of the second end of the plunger body. ### Claim 19 (depends on 14) The vented syringe of claim 14, wherein the plunger seal is disposed around a portion of the air intake channel. ### Claim 20 A vented syringe, comprising: a syringe body defining a syringe cavity; a plunger body disposed at least partially within the syringe cavity, the plunger body comprising: an air intake channel defined within the plunger body and extending between a first end and a second end of the plunger body; and a thumb pad disposed at the first end of the plunger body; a filter disposed inwardly adjacent to the thumb pad at the first end of the plunger body and in fluid communication with the air intake channel; a plunger seal disposed at the second end of the plunger body and sealingly engaged with the syringe cavity, wherein the plunger body is stationary relative to the plunger seal; and a one-way valve disposed at the second end of the plunger body, wherein the one-way valve, the plunger seal, and the syringe cavity cooperatively define a syringe volume within the syringe cavity, the one-way valve is in fluid communication with the air intake channel and the syringe volume, and the one-way valve is configured to prevent fluid flow from the syringe volume to the air intake channel and permit fluid flow from the air intake channel to the syringe volume, and to prevent liquid within the air intake channel and permit air flow from the air intake channel to the syringe volume.