Male connector

Patent metadata

Field	Value
Publication number	US-2016354594-A1
Application number	US-201415103165-A
Country	US
Kind code	A1
Filing date	Dec 9, 2014
Priority date	Dec 11, 2013
Publication date	Dec 8, 2016
Grant date	—

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.

First 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.

2 . 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.

3 . 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.

4 . 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.

5 . 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.

6 . 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.

7 . 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.

8 . 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.

9 . 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.

10 . 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.

11 . 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.

12 . 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.

13 . 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.

14 . The male connector according to claim 1 , wherein the male luer and the first female threading are compliant with ISO 80369-3.

15 . 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.

16 . 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.

17 . 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.

Assignees

• Jms Co Ltd

Inventors

• Uehara Yasumasa
• Ueda Yutaka
• Takimoto Kazuhiko
• Harada Megumi

Classifications

• A61J15/00

  Feeding-tubes for therapeutic purposes · CPC title

• A61M2039/1033

  Swivel nut connectors, e.g. threaded connectors, bayonet-connectors · CPC title

• A61M39/10 Primary

  Tube connectors; Tube couplings {(A61M39/02 takes precedence; connecting needles to syringes or hubs A61M5/34; connecting catheter tubes to hubs A61M25/0014)} · CPC title

• A61M2039/1088

  having a plurality of male connectors, e.g. Luer connectors · CPC title

• A61M39/1011 Primary

  Locking means for securing connection; Additional tamper safeties (A61M39/16 takes precedence) · CPC title