# US 2016/0354594 A1 · Male connector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2016/0354594 A1 - Document ID: US20160354594A1 - Status: Published application - Kind: A1 - Application number: 15/103,165 - Filed: 2014-12-09 - Published: 2016-12-08 - Earliest claimed: 2013-12-11 - Assignees: JMS Co., Ltd. - Applicants: Jms Co., Ltd. - Inventors: Yasumasa UEHARA; Yutaka UEDA; Kazuhiko TAKIMOTO; Megumi HARADA - Web page: https://patentgrep.com/patent/US20160354594A1 ## CPC - A61M 39/10: Tube connectors or tube couplings - A61J 15/00: Feeding-tubes for therapeutic purposes - A61M 39/1011: {Locking means for securing connection; Additional tamper safeties (A61M39/16 takes precedence)} - A61M 39/1033: {Swivel nut connectors, e.g. threaded connectors or bayonet-connectors} - A61M 2039/1088: {having a plurality of male connectors, e.g. Luer 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)} - 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 The male connector (1) includes a connector body (10) and a lock nut (50). The connector body (10) includes a male luer (11), first female threading (41) that surrounds the male luer (11), a base end portion (20) that is inserted into a tube (8), a fixed protrusion (21) formed on the base end portion (20), and a spiral protrusion (32) between the male luer (11) and the base end portion (20). The lock nut (50) includes second female threading (52) that is screwed together with the spiral protrusion (32). When the spiral protrusion (32) and the second female threading (52) are screwed together, the base end portion (20) and the lock nut (50) clamp the tube (8). First rotation prevention mechanisms (14, 54) that engage with one another are provided on the connector body (10) and the lock nut (50) such that the lock nut (50) does not rotate relative to the connector body (10) when the tube (8) is clamped. ## Claims ### Claim 1 A male connector removably attached to an upstream end of a tube used in enteral feeding, the male connector comprising: a connector body and a lock nut, the connector body including a tubular male luer in which a channel in communication with the tube is formed, first female threading that surrounds the male luer, a base end portion that is inserted into the tube, and a spiral protrusion that protrudes outward between the male luer and the base end portion, and the lock nut having a hollow tubular shape and being open at two ends, and including second female threading that is screwed together with the spiral protrusion, wherein when the spiral protrusion and the second female threading are screwed together, the base end portion and the lock nut clamp the tube in which the base end portion is inserted, and first rotation prevention mechanisms that engage with one another are provided on the connector body and the lock nut such that the lock nut does not rotate relative to the connector body when the tube is clamped. ### Claim 2 (depends on 1) The male connector according to claim 1, wherein the lock nut includes a small diameter portion that opposes the tube, and when the spiral protrusion and the second female threading are screwed together, the base end portion and the small diameter portion clamp the tube in which the base end portion is inserted. ### Claim 3 (depends on 2) The male connector according to claim 2, wherein the connector body includes a fixed protrusion that protrudes outward and is formed on an outer circumferential face of the base end portion, and when the spiral protrusion and the second female threading are screwed together, the fixed protrusion and the small diameter portion clamp the tube in which the base end portion is inserted. ### Claim 4 (depends on 1) The male connector according to claim 1, wherein the first rotation prevention mechanisms are formed on a flange that protrudes outward from a position of the connector body between the male luer and the spiral protrusion, and on an end face, on a second female threading side, of the lock nut. ### Claim 5 (depends on 1) The male connector according to claim 1, wherein the first rotation prevention mechanisms are formed on an outer circumferential face of the connector body between the base end portion and the spiral protrusion, and on an inner circumferential face of the lock nut. ### Claim 6 (depends on 1) The male connector according to claim 1, wherein the first rotation prevention mechanisms include a protruding portion formed on one of the connector body and the lock nut, and a receding portion formed on another one of the connector body and the lock nut, the protruding portion and the receding portion engage in a circumferential direction, the protruding portion includes an inclined face on one side in the circumferential direction, and includes a vertical face on another side in the circumferential direction, and the receding portion includes an inclined face and a vertical face that respectively oppose the inclined face and the vertical face of the protruding portion when the protruding portion is fitted into the receding portion. ### Claim 7 (depends on 1) The male connector according to claim 1, wherein the male connector can be connected to a female connector that includes an insertion portion for insertion of the male luer and male threading that is to be screwed together with the first female threading, and the first rotation prevention mechanisms are configured such that when the lock nut and the female connector are rotated in mutually opposite directions in order to separate the male connector and the female connector that are connected to each other, screwing together of the first female threading and the male threading is loosened, without the lock nut rotating relative to the connector body. ### Claim 8 (depends on 1) The male connector according claim 1, wherein the connector body is constituted by two parts, the two parts being a luer portion having the male luer, the base end portion, and the spiral protrusion, and a lock portion having the first female threading, the lock portion has a hollow tubular shape and is open at two ends, and is removably attached to the luer portion, and second rotation prevention mechanisms that engage with one another are provided on the luer portion and the lock portion such that the lock portion does not rotate relative to the luer portion. ### Claim 9 (depends on 8) The male connector according to claim 8, wherein the male connector can be connected to a female connector that includes an insertion portion for insertion of the male luer and male threading that is to be screwed together with the first female threading, and the second rotation prevention mechanisms are configured such that when the lock nut and the female connector are rotated in mutually opposite directions in order to separate the male connector and the female connector that are connected to each other, screwing together of the first female threading and the male threading is loosened, without the lock portion rotating relative to the luer portion. ### Claim 10 (depends on 8) The male connector according to claim 8, wherein a liquid-tight seal between the luer portion and the lock portion is formed at a position on a base end portion side relative to the male luer. ### Claim 11 (depends on 10) The male connector according to claim 10, wherein the liquid-tight seal is formed by fitting together of a male tapered face formed on the luer portion and a female tapered face formed on the lock portion. ### Claim 12 (depends on 1) The male connector according to claim 1, wherein the connector body includes an extension portion arranged outward of the lock nut, and the extension portion is configured such that rotation torque can be applied to the male connector via the extension portion. ### Claim 13 (depends on 12) The male connector according to claim 12, wherein the extension portion includes at least one bar-shaped member that extends parallel with a lengthwise direction of the connector body, and the at least one bar-shaped member is arranged so as to protrude outward from an outer circumferential face of the lock nut. ### Claim 14 (depends on 1) The male connector according to claim 1, wherein the male luer and the first female threading are compliant with ISO 80369-3. ### Claim 15 (depends on 1) The male connector according to claim 1, wherein at least one of the connector body and the lock nut includes a protrusion or recession for facilitating attachment and detachment of the lock nut to and from the connector body. ### Claim 16 (depends on 1) The male connector according to claim 1, wherein the lock portion includes a protrusion or recession for facilitating attachment and detachment of the lock portion to and from the luer portion. ### Claim 17 (depends on 15) The male connector according to claim 15, further comprising a jig configured so as to engage with the protrusion or recession, wherein the jig is configured such that rotation torque can be applied to the connector body or the lock nut via the jig.