Medicament guiding assembly for a drug delivery device

Patent metadata

Field	Value
Publication number	US-10016562-B2
Application number	US-201214356878-A
Country	US
Kind code	B2
Filing date	Nov 15, 2012
Priority date	Nov 16, 2011
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

The present invention relates to method of manufacturing a fluid guiding assembly for a drug delivery device and to a respective fluid guiding assembly. Said method comprising the steps of: providing a first member having at least one recess in a first surface portion, at least partially filling the recess with a joining component at least partially protruding from the first surface portion of the first member, arranging a second member having a second surface portion adjacent to the first member such that first and second surface portions thereof face towards each other to form an interface area between the first and the second members, wherein the joining component comprises a material different to the material of the first and/or second member wherein at least one channel structure extending along the interface area is formed by at least one deepening of the first member and/or of the second member, selectively providing thermal energy to the joining component to bond together first and second members.

First claim

The invention claimed is:

1. A fluid guiding assembly for a drug delivery device comprising:
a first member having at least one first recess in a first surface portion,
a second member adjacently disposed to the first member, the second member having a second surface portion facing towards the first surface portion of the first member to form an interface area between first and second members, the second member having at least one second recess in the second surface portion, wherein the at least one first recess is aligned with the at least one second recess, and
at least one channel structure extending along the interface area of the first and second members and being formed by at least one deepening in the first member and/or in the second member,
wherein the at least one channel structure is between the first member and the second member,
wherein the at least one first recess is at least partially filled with a joining component comprising a material different to a material of the first and/or second member,
wherein the joining component at least partially protrudes from the first surface portion of the first member into the at least one second recess, and
wherein the at least one second recess is wider than the at least one first recess.

2. The fluid guiding assembly according to claim 1 , wherein the second member extends at least across the deepening of the first member to form a closed fluid guiding channel structure.

3. The fluid guiding assembly according to claim 1 , wherein the joining component is configured to bond the first member and the second member responsive to thermal energy applied to the joining component.

4. The fluid guiding assembly according to claim 1 , wherein the at least one deepening comprises a first deepening in the first member and a second deepening in the second member, and wherein the first deepening corresponds in size and position with the second deepening.

5. The fluid guiding assembly according to claim 1 , wherein the joining component is frictionally or positively engaged with the at least one second recess.

6. The fluid guiding assembly according to claim 1 , wherein the joining component and the first member are injection molded by way of a two- or multi-component injection molding process.

7. The fluid guiding assembly according to claim 1 , wherein the joining component has a larger absorption coefficient for a predefined spectral range of electromagnetic radiation than the material of the first and/or second members.

8. The fluid guiding assembly according to claim 7 , wherein the joining component is doped with one or more radiation absorbing particles that match with the predefined spectral range.

9. The fluid guiding assembly according to claim 7 , wherein the first member and the second member are substantially transparent to electromagnetic radiation in the predefined spectral range.

10. A drug delivery device adapted to dispense a predefined amount of a medicament via an outlet, comprising:
a housing to receive at least one cartridge at least partially filled with a medicament,
a dispensing end to dispense a predefined amount of the medicament, and
a fluid guiding assembly according to claim 1 disposed between the cartridge and the dispensing end, wherein the at least one channel structure of the fluid guiding assembly is arranged in a fluid path between the at least one cartridge and the dispensing end.

11. The drug delivery device of claim 10 , wherein the fluid guiding assembly is in a needle hub.

12. The fluid guiding assembly according to claim 1 , wherein an extension of the joining component in a direction parallel to a plane normal of (i) the first surface portion of the first member and (ii) the second surface portion of the second member is larger than a sum of a depth of the at least one recess of the first member and the at least one second recess of the second member.

13. The fluid guiding assembly according to claim 12 , wherein the joining component is dimensioned such that a lateral gap is formed between the joining component and the at least one second recess of the second member.

14. A method of manufacturing a fluid guiding assembly, comprising the steps of:
providing a first member having at least one first recess in a first surface portion,
at least partially filling the at least one first recess with a joining component at least partially protruding from the first surface portion of the first member,
arranging a second member having a second surface portion adjacent to the first member such that first and second surface portions thereof face towards each other to form an interface area between the first and the second members, wherein the second member has at least one second recess in the second surface portion, wherein the at least one first recess is aligned with the at least one second recess,
wherein the joining component comprises a material different to a material of the first and/or second member,
wherein the joining component at least partially protrudes from the first surface portion of the first member into the second recess,
wherein the at least one second recess is wider than the at least one first recess,
wherein at least one channel structure extends along the interface area and is formed by at least one deepening of the first member and/or of the second member, and
wherein the at least one channel structure is between the first member and the second member, and
selectively providing thermal energy to the joining component to bond together first and second members.

15. The method according to claim 14 , wherein the thermal energy is provided to the joining component by way of electromagnetic radiation.

16. The method according to claim 14 , wherein the first and second members are pressed together during the application of thermal energy to the joining component.

17. The method according to claim 14 , wherein an extension of the joining component in a direction parallel to the surface normal of first and/or second surface portions is substantially larger than the sum of the respective depths of the at least one first recess and the at least one second recess of the first and second members.

18. The method according to claim 14 , wherein the at least one second recess of the second member is wider than a lateral extension of the joining component.

19. The method according to claim 14 , wherein selectively providing thermal energy to the joining component melts the joining component, and wherein upon melting of the joining component, excess material of the joining component extends into and fills a lateral gap between the joining component and the at least one second recess of the second member.

20. The method according to claim 14 , wherein thermal energy is provided to the joining component until first and second surfaces of first and second members mutually abut in a direct mechanical contact.

Assignees

• Sanofi Aventis Deutschland

Inventors

• Holtwick Marc
• Haupt Martin

Classifications

• B29C65/1483

  coated on the article · CPC title

• B29C65/565

  involving interference fits, e.g. force-fits or press-fits (B29C65/66 takes precedence) · CPC title

• B29C66/1122

  Single lap to lap joints, i.e. overlap joints (B29C66/45, B29C66/472, B29C66/52272 take precedence) · CPC title

• A61M5/19

  having more than one chamber {, e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly (surgical glue applicators A61B17/00491)} · CPC title

• B29C65/168

  placed at the interface · CPC title