# US 12,594,221 B2 · Connection arrangement for closed system transfer of fluids > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,594,221 B2 - Document ID: US12594221B2 - Status: Granted - Kind: B2 - Application number: 17/861,851 - Filed: 2022-07-11 - Published: 2022-10-27 - Granted: 2026-04-07 - Earliest claimed: 2018-03-20 - Assignees: Becton, Dickinson and Company - Applicants: Becton Dickinson and Company Limited - Inventors: Austin Jason McKinnon; Milan Ivosevic - Web page: https://patentgrep.com/patent/US12594221B2 ## CPC - A61J 1/2096: {Combination of a vial and a syringe for transferring or mixing their contents} - A61J 1/1406: {Septums, pierceable membranes} - A61J 1/201: {having one piercing end} - A61J 1/202: {Separating means} - A61J 1/2048: {Connecting means} - 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 A system for closed transfer of fluids includes a vial adapter having a body with a first end and a second end, a vial connection extending from the second end of the body, with the vial connection configured to secure the body to a vial, a vial spike extending from the second end of the body, with the vial spike defining a passageway, and a collet connection extending from the first end of the body. The system further includes a syringe adapter including a housing having a first end and a second end, a membrane housing positioned within the housing, with the membrane housing moveable between a first position and a second position, a cannula positioned within the housing, and a syringe connection extending from the first end of the housing, with the syringe connection configured to be secured to a syringe barrel. ## Claims ### Claim 1 A system for closed transfer of fluids comprising: a patient connector comprising: a body having a first end and a second end; a patient connection extending from the second end of the body, the patient connection configured to secure the body to a patient line; and a collet connection extending toward the first end of the body; and a syringe adapter comprising: a housing having a first end and a second end; a membrane housing positioned within the housing, the membrane housing moveable between a first position and a second position, the membrane housing including at least one membrane; a cannula positioned within the housing, the cannula having a first end and a second end, the second end of the cannula positioned within the membrane housing when the membrane housing is in the first position and positioned outside of the membrane housing when the membrane housing is in the second position; and a syringe connection extending from the first end of the housing, the syringe connection configured to be secured to a syringe barrel, wherein the collet connection is moveable between a first position where the collet connection is configured to receive the membrane housing and a second position where the collet connection is configured to be secured to the membrane housing, and wherein the collet connection comprises a collet body and first and second arms extending from the collet body away toward the first end of the body of the patient connector, the first and second arms defining a space configured to receive the membrane housing. ### Claim 2 (depends on 1) The system of claim 1, wherein the housing of the syringe adapter comprises a first portion positioned adjacent to the first end of the housing and a second portion positioned adjacent to the second end of the housing, the first portion of the housing having a smaller internal diameter relative to the internal diameter of the second portion of the housing, and wherein the collet connection is in the first position when the collet connection is positioned within the second portion of the housing and in the second position when the collet connection is positioned within the first portion of the housing. ### Claim 3 (depends on 2) The system of claim 2, wherein the collet connection is moveable radially inward when transitioning from the first position to the second position. ### Claim 4 (depends on 3) The system of claim 3, wherein the housing comprises a transition portion positioned between the first and second portions of the housing, the transition portion configured to engage the collet connection to move the collet connection from the first position to the second position when the collet connection is positioned within the housing of the syringe adapter. ### Claim 5 (depends on 4) The system of claim 4, wherein the transition portion is frusto- conical. ### Claim 6 (depends on 1) The system of claim 1, wherein the first and second arms each include a projection extending radially inward, the projection configured to engage the membrane housing when the collet connection is in the second position with the membrane housing received within the space. ### Claim 7 (depends on 1) The system of claim 1, wherein the collet body defines a passageway in fluid communication with the patient connection, the collet body further comprising a collet membrane configured to engage the membrane of the of the syringe adapter. ### Claim 8 (depends on 1) The system of claim 1, wherein the patient connector further comprises a collet housing extending toward the first end of the body, the collet connection positioned within the collet housing, the collet housing configured to receive a portion of the housing of the syringe adapter. ### Claim 9 (depends on 8) The system of claim 8, wherein the collet housing defines an indicator opening and the housing of the syringe adapter includes an indicator, the indicator configured to be visible via the indicator opening when the collet connection is in the second position. ### Claim 10 (depends on 1) The system of claim 1, wherein the patient connector further comprises a projection configured to engage a corresponding projection within the housing of the syringe adapter to secure the patient connector to the syringe adapter.