Injection Device with Extraction Mechanism

• US 20080269695A1
• Filed: 05/02/2005
• Published: 10/30/2008
• Est. Priority Date: 05/07/2004
• Status: Active Grant

• Current Assignee: Perouse Medical Co.
• Original Assignee: Laboratories Perouse
• Inventors: Perouse, Eric, Walter, Thomas
• Granted Patent: US 7,927,317 B2
• Time in Patent Office: Days
• US Class Current: 604/240
• CPC Class Codes: A61M 2005/1581 Right-angle needle-type devices
• CPC Class Codes: A61M 2005/1583 Needle extractors
• CPC Class Codes: A61M 2209/045 for filling, e.g. for filling reservoirs
• CPC Class Codes: A61M 25/0612 Devices for protecting the needle; Devices to help insertion of the needle, e.g. wings or holders
• CPC Class Codes: A61M 39/0208 Subcutaneous access sites for injecting or removing fluids transcutaneous access sites A61M39/0247; implantable infusion devices A61M5/14276
• CPC Class Codes: A61M 5/158 Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
• CPC Class Codes: A61M 5/3243 being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel devices for protecting guide needles in combination with catheters A61M25/0612

Abstract

The injection device (10) comprises:

• • a needle support (24);
  • an injection needle (22) which is fixedly joined to the needle support (24) and which has a free end (28) which is arranged with spacing from the needle support (24); and
  • a mechanism (50) for extracting the injection needle (22), comprising a base (52) and a pushing member (54) which can be moved relative to the base (52) between a position in which the needle (22) is used and a position in which the needle (22) is extracted.

The base (52) is permanently connected to the needle support (24) and can be moved relative to the needle support (24) between an inactive position of the extraction mechanism (50) and an active position of the extraction mechanism (50).

Use for injection of doses of medication.

Claims

1. Injection device comprising:

a needle support;

an injection needle which is fixedly joined to the needle support and which has a free end which is arranged with spacing from the needle support; and

a mechanism for extracting the injection needle, comprising a base and a pushing member which can be moved relative to the base between a position in which the needle is used and a position in which the needle is extracted, characterised in that the base is permanently connected to the needle support and can be moved relative to the needle support between an inactive position of the extraction mechanism and an active position of the extraction mechanism.

2. Device according to claim 1, characterised in that the base delimits a passage for movement of the pushing member, in which the pushing member is received so as to slide between the position in which the needle is used and the position in which the needle is extracted.

3. Device according to claim 1, characterised in that the injection needle is mounted on a head at the end of the needle support, the head being visible in the inactive position of the extraction mechanism.

4. Device according to claim 1, characterised in that the base is articulated relative to the needle support.

5. Device according to claim 1, characterised in that the pushing member is generally elongate, and in that the pushing member extends in a plane which is generally perpendicular relative to the main portion of the needle, when the base is in the inactive position of the mechanism.

6. Device according to claim 1, characterised in that the pushing member is generally hollowed out and in that the needle support comprises a core which is at least partially received in the pushing member when the base is in the inactive position of the mechanism.

7. Device according to claim 1, characterised in that the needle support and the base comprise complementary resilient engagement means which are capable of temporarily retaining the base relative to the needle support in the inactive position of the extraction mechanism and/or in the active position of the extraction mechanism.

8. Device according to claim 1, characterised in that the base comprises radial extensions which form finger supports.

9. Device according to claim 1, characterised in that the pushing member can be moved in a sliding manner relative to the base.

10. Device according to claim 1, characterised in that the base and the pushing member comprise complementary resilient engagement means which are capable of temporarily retaining the pushing member relative to the base in the position thereof in which the needle is extracted and/or in the position thereof in which the needle is used.