# US 10,864,145 B2 · Male connector > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,864,145 B2 - Document ID: US10864145B2 - Status: Granted - Kind: B2 - Application number: 15/103,141 - Filed: 2014-12-09 - Published: 2016-12-08 - Granted: 2020-12-15 - 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/US10864145B2 ## CPC - A61J 15/0026: {Parts, details or accessories for feeding-tubes (external tubes from medical containers to a connector outside of the body A61M39/08)} - A61J 15/00: Feeding-tubes for therapeutic purposes - A61M 39/1011: {Locking means for securing connection; Additional tamper safeties (A61M39/16 takes precedence)} - A61M 39/1055: {Rotating or swivel joints} - A61M 39/12: for joining a flexible tube to a rigid attachment - A61M 39/1033: {Swivel nut connectors, e.g. threaded connectors or bayonet-connectors} - 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 - 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 male connector (1) includes a luer portion (10) connected to the upstream end of a tube (8) used in enteral feeding, and a lock portion (20) that is removably attached to the luer portion. The luer portion (10) includes a tubular male luer (11) in which a channel (17) in communication with the tube (8) is formed. The lock portion (20) has a hollow tubular shape and is open at two ends, and includes female threading (21) that opposes the male luer on the inner circumferential face of the lock portion (20). The male luer (11) is inserted into the lock portion (20). Rotation prevention mechanisms (16, 26) that engage with one another are provided on the luer portion (10) and the lock portion (20) such that the lock portion (20) does not rotate relative to the luer portion (10). ## Claims ### Claim 1 A male connector to be provided at an upstream end of a tube used in enteral feeding, the male connector comprising: a luer portion; and a lock portion that is removably attached to the luer portion, wherein the luer portion includes a base end portion suitable to be connected to the tube and a tubular male luer that is provided on the base end portion and in which a channel in communication with the tube is formed, the lock portion includes a lock portion body and two or more bar-shaped extension portions, and the lock portion body has a hollow tubular shape and is open at two ends and includes female threading that opposes the male luer on an inner circumferential face of the lock portion body, and the bar-shaped extension portions are formed integrally with the lock portion body and extend parallel to a lengthwise direction of the luer portion from an end of the lock portion body, when the lock portion is attached to the luer portion, the male luer is inserted into the lock portion body, and the bar-shaped extension portions of the lock portion are arranged radially outward relative to the base end portion of the luer portion so that the bar-shaped extension portions cover part of an outer circumferential face of the base end portion of the luer portion and expose a remaining part thereof, 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 and a male tapered face formed on the luer portion and a female tapered face formed on the lock portion come into direct contact with each other and fit together such that a liquid-tight seal is formed between the luer portion and the lock portion at a position on a tube side relative to the male luer. ### Claim 2 (depends on 1) The male connector according to claim 1, wherein the luer portion is made of a harder material than the lock portion. ### Claim 3 (depends on 1) The male connector according to claim 1, wherein the rotation prevention mechanisms include a protruding portion provided on the lock portion and a receding portion that is provided in the luer portion, the protruding portion being fitted into the receding portion. ### Claim 4 (depends on 1) The male connector according to claim 1, wherein the rotation prevention mechanisms include a protruding portion formed on one of the lock portion and the luer portion, and a receding portion formed on another one of the lock portion and the luer portion, the protruding portion includes an inclined face on one side in a 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 5 (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 female threading, and the rotation prevention mechanisms are configured such that when the luer portion 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 female threading and the male threading is loosened, without the lock portion rotating relative to the luer portion. ### Claim 6 (depends on 1) The male connector according to claim 1, wherein separation prevention mechanisms that engage with one another are provided on the luer portion and the lock portion such that the luer portion and the lock portion do not become separated along a lengthwise direction of the male luer. ### Claim 7 (depends on 6) The male connector according to claim 6, wherein the separation prevention mechanisms include screwing structures. ### Claim 8 (depends on 1) The male connector according to claim 1, wherein the bar-shaped extension portions are configured such that rotation torque can be applied to the male connector via the bar-shaped extension portions. ### Claim 9 (depends on 1) The male connector according to claim 1, wherein the bar-shaped extension portions are arranged so as to protrude outward from the outer circumferential face of the base end portion. ### Claim 10 (depends on 1) The male connector according to claim 1, wherein at least one of the luer portion and the lock portion includes a protrusion or recession for facilitating attachment and detachment of the lock portion to and from the luer portion. ### Claim 11 (depends on 10) The male connector according to claim 10, 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 luer portion or the lock portion via the jig. ### Claim 12 (depends on 1) The male connector according to claim 1, wherein the rotation prevention mechanisms are provided on the outer circumferential face of the base end portion and end faces of the bar-shaped extension portions.