Syringe with integrated needle

Patent metadata

Field	Value
Publication number	US-9381687-B2
Application number	US-201113805835-A
Country	US
Kind code	B2
Filing date	Jun 29, 2011
Priority date	Jun 29, 2010
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A syringe ( 20 ) is disclosed including a needle ( 22 ) and a barrel ( 24 ). The needle can have an outside surface ( 32 ), a delivery outlet ( 34 ) at one end, a base ( 36 ) at the other end, and an internal passage ( 38 ) extending from the base to the delivery outlet. The barrel can have a generally cylindrical interior surface portion ( 40 ) defining a lumen. The barrel also can have a front passage ( 44 ) molded around and in fluid-sealing contact with the outside surface of the needle. A method of making such a syringe is also disclosed. A mold ( 80 ) for making the barrel defines a front opening of the barrel to be molded around and in fluid-sealing contact with the outside surface of the needle. The needle is positioned within the mold cavity, with its base abutting the core. The barrel is molded against the needle to join the barrel and the needle.

First claim

The invention claimed is:

1. A method of making a syringe comprising:
providing a needle having an outside surface, a delivery outlet at one end, a base at the other end, and an internal passage extending from the base to the delivery outlet;
providing a mold for making a barrel having an interior surface portion defining a lumen and a front passage, the mold comprising a mold core and a mold cavity, the mold core including a leading portion defining the front of the barrel and a needle support projection located at the top of the core where the core contacts the base of the needle, the needle support projection projecting from the leading portion of the core;
positioning at least a portion of the needle within the mold cavity, with its base abutting the needle support projection of the mold core or extending into the mold core and at least a portion of its outside surface exposed within the mold cavity;
injection molding the barrel by injecting moldable material into the mold cavity, forming the portion of the barrel defining the front opening against the portion of the needle outside surface exposed within the mold cavity to join the barrel and the needle with the needle base displaced from the interior surface portion of the syringe barrel; and
shrinking the molding material to put the base of the needle at a location that will be flush with the interior surface portion of the syringe barrel.

2. The method of making a syringe of claim 1 , in which the barrel comprises a generally hemispheric surface adjacent to the front passage.

3. The method of making a syringe of claim 1 , further comprising applying a PECVD barrier layer on at least the hemispheric interior surface portion of the barrel.

4. The method of making a syringe of claim 3 , in which the barrier layer forms a barrier between the base of the needle and the generally cylindrical interior surface portion of the barrel.

5. The method of making a syringe of claim 3 , in which the barrier layer comprises SiO x , in which x is from about 1.5 to about 2.9.

6. The method of making a syringe of claim 3 , in which the barrier layer is effective to provide an oxygen barrier.

7. The method of making a syringe of claim 3 , further comprising subsequently prefilling the syringe with a fluid, wherein the barrier layer is effective to reduce leaching of the material of the barrel into the fluid.

8. The method of making a syringe of claim 1 , further comprising applying a PECVD-applied lubricity coating on at least a portion of the interior surface portion of the barrel.

9. The method of making a syringe of claim 1 , in which the needle outside surface has a non-cylindrical portion within at least a portion of the barrel front passage for anchoring it within the barrel.

10. The method of making a syringe of claim 1 , in which the needle is a hypodermic needle.

11. The method of making a syringe of claim 1 , in which the barrel is injection molded.

12. The method of making a syringe of claim 1 , in which the barrel is made of a cyclic olefin copolymer (COC) layer and a polyethylene terephthalate (PET) layer.

13. The method of making a syringe of claim 1 , in which the barrel is made of a cyclic olefin copolymer (COC) outer wall and a polyethylene terephthalate (PET) inner wall.

14. The method of making a syringe of claim 1 , in which the interior surface portion of the barrel is cylindrical.

Assignees

• Felts John T
• Giraud Jean-Pierre
• Sio2 Medical Products Inc

Inventors

• Felts John T
• Giraud Jean-Pierre

Classifications

• A61M5/3129 Primary

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

• A61M5/3202

  Devices for protection of the needle before use, e.g. caps (A61M5/50 takes precedence; for infusion spikes A61M5/1626; protectors for sharps A61B50/3001) · CPC title

• B29C45/14598

  Coating tubular articles · CPC title

• C23C16/045

  Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates · CPC title

• B29L2031/7544

  Injection needles, syringes · CPC title