# US 12,109,386 B2 · Adaptor for a needleless access device and method for connecting said device thereon > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,109,386 B2 - Document ID: US12109386B2 - Status: Granted - Kind: B2 - Application number: 17/162,690 - Filed: 2021-01-29 - Published: 2021-05-20 - Granted: 2024-10-08 - Earliest claimed: 2013-07-23 - Assignees: Becton Dickinson France - Applicants: Becton Dickinson France - Inventors: Sylvain Hallynck; Robin Woolls; Lionel Maritan; Thomas Devouassoux - Web page: https://patentgrep.com/patent/US12109386B2 ## CPC - A61M 39/10: Tube connectors or tube couplings - A61M 5/347: {rotatable, e.g. bayonet or screw (A61M5/344 takes precedence)} - A61M 39/1011: {Locking means for securing connection; Additional tamper safeties (A61M39/16 takes precedence)} - A61M 5/3134: {characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula} - A61M 39/1033: {Swivel nut connectors, e.g. threaded connectors or bayonet-connectors} - A61M 2039/1038: {Union screw connectors, e.g. hollow screw or sleeve having external threads} - A61M 2039/1077: {Adapters, e.g. couplings adapting a connector to one or several other 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 An adaptor for connecting a drug delivery device to a needleless access device having a straight external thread, including engagement means for mounting said adaptor on the drug delivery device, and an internal thread intended to cooperate with said external thread on a determined length, said internal thread showing on a distal part of said length a first major diameter mating that of said straight external thread, wherein said internal thread shows on a proximal part of said length a second major diameter, where the second major diameter is strictly smaller than the first major diameter, said internal thread further including a tapered portion linking said proximal part to said distal part. ## Claims ### Claim 1 A needleless access device assembly, comprising: a needleless access device provided with a straight external thread, said straight external thread having a major diameter of constant value over the whole length of said straight external thread; and an adaptor for connecting a drug delivery device to the needleless access device, the adaptor comprising: a globally tubular body having a proximal region and a distal region, said proximal region being provided with an engagement element for mounting said adaptor on the drug delivery device, said distal region being provided on its inner wall with an internal thread cooperating with said external thread on a determined length of said internal thread, said internal thread having on a distal part of said length, said distal part having a first length, a first major diameter of constant value mating that of said straight external thread, wherein said internal thread has, on a proximal part of said first length, a second major diameter, where the second major diameter is strictly smaller than the first major diameter, the proximal part of the internal thread being configured for cooperating with the same straight external thread as the distal part of the internal thread, wherein said internal thread further comprises a tapered portion linking said proximal part to said distal part, said tapered portion having a second length and said tapered portion of the internal thread being configured for cooperating with the same external thread as the distal part and the proximal part of the internal thread. ### Claim 2 (depends on 1) The needleless access device assembly according to claim 1, wherein the ratio of the second major diameter to the first major diameter ranges from 0.95 to 0.98. ### Claim 3 (depends on 1) The needleless access device assembly according to claim 1, wherein said proximal part having a third length, the second major diameter having a constant value over the third length. ### Claim 4 (depends on 1) The needleless access device assembly according to claim 1, wherein the ratio of the first length of the distal part to the second length of the tapered portion ranges from 0.9 to 1.1. ### Claim 5 (depends on 1) The needleless access device assembly according to claim 1, wherein said engagement element comprises a proximal inner rim frictionally engageable on the distal tip of the drug delivery device. ### Claim 6 (depends on 5) The needleless access device assembly according to claim 5, wherein the inner rim is radially expandable. ### Claim 7 (depends on 1) The needleless access device assembly according to claim 1, wherein the ratio of the first length of the distal part to the third length of the proximal part ranges from 1.125 to 1.325. ### Claim 8 (depends on 1) The needleless access device assembly according to claim 1, wherein the ratio of the second length of the tapered portion to the third length of the proximal part ranges from 1.125 to 1.325. ### Claim 9 (depends on 1) The needleless access device assembly according to claim 1, wherein the needleless access device further comprises the drug delivery device comprising a distal tip defining an axial passageway for the transfer of a product contained in said drug delivery device, the adaptor being mounted on said distal tip. ### Claim 10 (depends on 9) The needleless access device assembly according to claim 9, wherein the distal tip is made of glass. ### Claim 11 (depends on 9) The needleless access device assembly according to claim 9, wherein the distal tip is conical and distally tapered. ### Claim 12 An adaptor for connecting a drug delivery device to a needleless access device provided with a straight external thread, the adaptor comprising: a globally tubular body having a proximal region and a distal region, said proximal region being provided with an engagement element for mounting said adaptor on the drug delivery device, said distal region being provided on its inner wall with an internal thread intended to cooperate with said external thread on a determined length of said internal thread so as to connect said needleless access device to said adaptor, said internal thread having on a distal part of said determined length, said distal part having a first length, a first major diameter of constant value mating that of said straight external thread, wherein said internal thread has on a proximal part of said determined length a second major diameter, where the second major diameter is smaller than the first major diameter, wherein said internal thread further comprises a tapered threaded portion linking said proximal part to said distal part, said tapered threaded portion having a second length, the internal thread being configured to increase the friction between the straight external thread and the tapered threaded portion and the proximal part of this internal thread, the proximal part, the tapered threaded portion and the distal part of the internal thread being configured to cooperate simultaneously with the same straight external thread of the needleless access device, wherein the ratio of the first length of the distal part to the second length of the tapered portion ranges from 0.9 to 1.1. ### Claim 13 (depends on 12) The adaptor according to claim 12, wherein the ratio of the second major diameter to the first major diameter ranges from 0.95 to 0.98. ### Claim 14 (depends on 12) The adaptor according to claim 12, wherein said proximal part having a third length, the second major diameter has a constant value over the third length. ### Claim 15 (depends on 12) The adaptor according to claim 12, wherein said engagement element comprises a proximal inner rim frictionally engageable on the distal tip of the drug delivery device. ### Claim 16 (depends on 15) The adaptor according to claim 15, wherein the inner rim is radially expandable. ### Claim 17 (depends on 14) The adaptor according to claim 14, wherein the ratio of the first length of the distal part to the third length of the proximal part ranges from 1.125 to 1.325. ### Claim 18 (depends on 14) The adaptor according to claim 14, wherein the ratio of the second length of the tapered portion to the third length of the proximal part ranges from 1.125 to 1.325. ### Claim 19 (depends on 12) A drug delivery device comprising: a distal tip defining an axial passageway for the transfer of a product contained in said drug delivery device, and at least one adaptor according to claim 12 mounted on said distal tip. ### Claim 20 (depends on 19) The drug delivery device according to claim 19, wherein the distal tip is made of glass. ### Claim 21 (depends on 19) The drug delivery device according to claim 19, wherein the distal tip is conical and distally tapered. ### Claim 22 (depends on 1) The needleless access device assembly according to claim 1, wherein the straight external thread of the needleless access device defines a third major diameter equal to the first major diameter. ### Claim 23 (depends on 12) The adaptor according to claim 12, wherein the straight external thread of the needleless access device defines a third major diameter equal to the first major diameter.