INJECTION DEVICE

• US 20090054849A1
• Filed: 05/27/2005
• Published: 02/26/2009
• Est. Priority Date: 05/28/2004
• Status: Active Grant

• Current Assignee: Cilag Gmbh International (Johnson & Johnson)
• Original Assignee: Cilag AG International
• Inventors: Brady, Matthew, Burnell, Rosemary, Barrow-Williams, Tim, Harrison, Nigel
• Granted Patent: US 9,895,493 B2
• Time in Patent Office: Days
• US Class Current: 604/198
• CPC Class Codes: A61M 2005/206 With automatic needle insertion
• CPC Class Codes: A61M 2005/3109 Caps sealing the needle bore by use of, e.g. air-hardening adhesive, elastomer or epoxy resin
• CPC Class Codes: A61M 5/2033 Spring-loaded one-shot injectors with or without automatic needle insertion multishot dosing syringes A61M5/31525, needle insertion only A61M5/3287
• CPC Class Codes: A61M 5/3202 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 Class Codes: A61M 5/3204 Needle cap remover, i.e. devices to dislodge protection cover from needle or needle hub, e.g. deshielding devices
• CPC Class Codes: A61M 5/3213 Caps placed axially onto the needle, e.g. equipped with finger protection guards axially-extensible protective sleeves A61M5/3243

Abstract

An injection device 110 is described having a housing 112 and a housing closure means 130. The injection device 110 houses a syringe 114 having a needle 118 which is sealed by a boot 120. The housing closure means 130 is arranged so that the boot 120 can be connected to the housing closure means 130 simply, but cannot be removed from the housing closure means 130. The housing 112 and housing closure means 130 are arranged so that upon rotation of the housing closure means 130, the housing closure means 130 is moved axially away from the housing 112 and the boot 120 is removed from the syringe 114. The injection device is simple to use and manufacture.

Claims

1. An injection device comprising:

a housing adapted to receive a syringe having a discharge nozzle and a boot that covers its discharge nozzle, the housing defining a first axis and having first and second ends, wherein the discharge nozzle is capable of extending from the first end of the housing through an exit aperture, the housing further having a camming surface at its first end; and

a housing closure member having a camming surface for communicating with the camming surface on the housing so that rotation of the housing closure member about the axis causes the housing closure member to move axially away from the housing;

the housing closure member further comprising means for connecting to the boot of the syringe so that removal of the housing closure member from the housing causes removal of the boot from the syringe.

2. An injection device according to claim 1 wherein the camming surfaces on the housing and housing closure means comprise corresponding curved surfaces.

3. An injection device according to claim 1 further comprising an external grip feature with which a user can grip the housing closure member.

4. An injection device according to claim 1 wherein one of the housing closure member and the housing further comprises a ridge with which a corresponding indentation on the other of the housing closure member and the housing can communicate in order to retain the housing closure member on the housing.

5. An injection device according to claim 1 wherein the means for connecting comprises a pressed grip washer with a profiled internal diameter.

6. An injection device according to claim 5 wherein the internal diameter of the grip washer is castellated.

7. An injection device according to claim 5, wherein the grip washer comprises an internally toothed star washer or shake proof washer.

8. An injection device according to claim 5 wherein, upon connecting the boot of the syringe to the housing closure member, the grip washer is bent into a frustoconical shape.

9. An injection device according to claim 1 wherein the means for connecting is formed from metal.

10. An injection device according to claim 1 wherein the means for connecting is held in an indentation molded into the housing closure means.

11. An injection device according to claim 1 wherein the means for connecting is housed in a central boss molded into the inside of the housing closure means.

12. An injection device according to claim 11, in which the means for connecting is held in place in the housing closure means by an indentation molded into the central boss.

13. An injection device according to any of claim 1 wherein the means for connecting is molded from the same material as the housing closure means, as part of a central boss molded into the inside of the housing closure means.

14. An injection device according to claim 13, wherein the means for connecting comprises a central boss having a hollow end, wherein a lip of the hollow end is bevelled on its leading edge but not on its trailing edge.

15. An injection device according to claim 1 further comprising a support surface for supporting an end of a boot for a syringe.

16. (canceled)