Female syringe and syringe kit

Patent metadata

Field	Value
Publication number	US-11311680-B2
Application number	US-201916577501-A
Country	US
Kind code	B2
Filing date	Sep 20, 2019
Priority date	Mar 22, 2017
Publication date	Apr 26, 2022
Grant date	Apr 26, 2022

Abstract

A female syringe of a syringe kit includes a female syringe barrel including a cylindrical portion into which a nozzle of a male syringe is insertable, a hollow cylindrical packing arranged in the cylindrical portion, and a cap detachably attached to the cylindrical portion. When the cap is detached from the cylindrical portion, the packing remains in the cylindrical portion, a distal end opening is opened, and the nozzle of the male syringe is fitted in a liquid-tight manner to an inner side of the packing.

First claim

The invention claimed is:

1. A female syringe comprising:
a female syringe barrel comprising:
a hollow barrel body having an inner peripheral surface on which a gasket is slidable,
a cylindrical portion extended in a distal end direction from a distal end of the barrel body, into which a nozzle of a male syringe is insertable, and
a projection with which a screw of a lock adapter of the male syringe is screwable;

a hollow cylindrical packing made of an elastic material and arranged in the cylindrical portion, wherein the hollow cylindrical packing comprises an opening that extends entirely through the hollow cylindrical packing from a distal end to a proximal end of the hollow cylindrical packing; and
a cap detachably attached to the cylindrical portion and configured to close, in a liquid-tight manner, the opening of the packing;
wherein the female syringe is configured such that, when the cap is detached from the cylindrical portion, the packing remains in the cylindrical portion, the opening is opened, and the nozzle of the male syringe is fittable in a liquid-tight manner to an inner side of the packing; and
at least in a state in which the cap is attached to the cylindrical portion and in a state in which the nozzle of the male syringe is fitted in a liquid-tight manner to the inner side of the packing, an outer peripheral surface of the packing is in close contact with an inner peripheral surface of the cylindrical portion so as to make a full circle of a liquid tight sealing portion in a circumferential direction of the cylindrical portion.

2. The female syringe according to claim 1 , wherein:
the cap comprises:
a base, and
a convex fitting portion projecting in a proximal end direction from the base; and

the packing is held between the inner peripheral surface of the cylindrical portion and an outer peripheral surface of the convex fitting portion in a compressed state over an entire circumference of the packing.

3. The female syringe according to claim 2 , wherein:
an inner peripheral surface of the packing comprises:
a first fitting surface to which the convex fitting portion is fitted, and
a second fitting surface to which the nozzle of the male syringe is fittable, wherein the second fitting surface is formed on a proximal end side of the first fitting surface, and wherein an inner diameter of the second fitting surface is smaller than an inner diameter of the first fitting surface.

4. The female syringe according to claim 1 , wherein:
a radially projecting engaging convex portion is provided on one of the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the packing;
an engaging concave portion having a depth in a radial direction is provided on the other of the inner peripheral surface of the cylindrical portion and the outer peripheral surface of the packing; and
movement of the packing in an axial direction with respect to the cylindrical portion is restricted by engagement between the engaging convex portion and the engaging concave portion.

5. The female syringe according to claim 4 , wherein:
the engaging concave portion is provided on the outer peripheral surface of the packing.

6. The female syringe according to claim 1 , wherein:
a distal end portion of the packing comprises a ring-shaped swelling portion projecting radially outward and is locked by a distal end surface of the cylindrical portion.

7. A syringe kit comprising:
a male syringe comprising a male syringe barrel comprising:
a nozzle formed as a male lure, and
a lock adapter comprising a screw; and

a female syringe including a female syringe barrel for comprising:
a cylindrical portion into which the nozzle is insertable, and
a projection with which the screw of the lock adapter is screwable;

wherein the female syringe comprises:
a hollow cylindrical packing made of an elastic material and fitted in the cylindrical portion, and
a cap detachably attached to the cylindrical portion to close, in a liquid-tight manner, an opening of the packing; and

wherein the syringe kit is configured such that, when the cap is detached from the cylindrical portion, the packing remains in the cylindrical portion, the opening is opened, and the nozzle of the male syringe is fittable in a liquid-tight manner to an inner side of the packing.

8. The syringe kit according to claim 7 , wherein:
the cylindrical portion comprises:
a first cylindrical portion provided with the projection and having an outer diameter smaller than an inner diameter of the screw, and
a second cylindrical portion formed adjacent to a proximal end side of the first cylindrical portion and having an outer diameter larger than the outer diameter of the first cylindrical portion; and

the screw is on a distal end portion of the lock adapter and fits to the second cylindrical portion in a state in which the fitting of the nozzle to the cylindrical portion via the packing is completed.

9. The syringe kit according to claim 7 , wherein:
in a state in which the fitting of the nozzle to the cylindrical portion via the packing is completed, the packing is held between the cylindrical portion and the nozzle in a compressed state over an entire circumference of the packing.

10. The syringe kit according to claim 7 , wherein:
the cylindrical portion comprises an abutment portion that restricts a fitting depth of the nozzle into the cylindrical portion by abutment of a distal end of the lock adapter when the nozzle is fitted to the cylindrical portion via the packing.

11. A female syringe comprising:
a female syringe barrel comprising:
a hollow barrel body having an inner peripheral surface on which a gasket is slidable,
a cylindrical portion extended in a distal end direction from a distal end of the barrel body, into which a nozzle of a male syringe is insertable, and
a projection with which a screw of a lock adapter of the male syringe is screwable;

a hollow cylindrical packing made of an elastic material and arranged in the cylindrical portion; and
a cap detachably attached to the cylindrical portion and configured to close, in a liquid-tight manner, an opening of the packing, wherein the cap comprises a base and a convex fitting portion projecting in a proximal end direction from the base;
wherein the female syringe is configured such that, when the cap is detached from the cylindrical portion, the packing remains in the cylindrical portion, the opening is opened, and the nozzle of the male syringe is fittable in a liquid-tight manner to an inner side of the packing;
wherein at least in a state in which the cap is attached to the cylindrical portion and in a state in which the nozzle of the male syringe is fitted in a liquid-tight manner to the inner side of the packing, an outer peripheral surface of the packing is in close contact with an inner peripheral surface of the cylindrical portion so as to make a full circle of a liquid tight sealing portion in a circumferential direction of the cylindrical portion; and
wherein the packing is held between the inner peripheral surface of the cylindrical portion and an outer peripheral surface of the convex fitting portion in a compressed state over an entire circumference of the packing.

12. The female syringe according to claim 11 , wherein:
an inner peripheral surface of the packing comprises:
a first fitting surface to which the convex fitting portion is fitted, and
a second fitting surface to which the nozzle of the male syringe is fittable, wherein the second fitting surface is formed on a proximal end side of the first fitting surface, and wherein an inner diameter of the second fitting su

Assignees

• Terumo Corp

Inventors

• Okihara Hitoshi

Classifications

• A61M5/2066

  comprising means for injection of two or more media, e.g. by mixing · CPC title

• A61M2005/3103

  Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle · CPC title

• A61M2005/3131

  specially adapted for improving sealing or sliding · CPC title

• A61M5/3129

  Syringe barrels (A61M5/3205 and A61M5/50 take precedence) · CPC title

• A61M5/1782 Primary

  Devices aiding filling of syringes in situ (combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003) · CPC title