Injection device

• US 20020004639A1
• Filed: 01/05/2001
• Published: 01/10/2002
• Est. Priority Date: 01/07/2000
• Status: Active Grant

• Current Assignee: Valeritas, Inc. (Zealand Pharma A/S)
• Original Assignee: Biovail Laboratories Incorporated (Bausch Health Cos., Inc.)
• Inventors: Willis, John P., Minior, Thaddeus G.
• Granted Patent: US 6,616,627 B2
• Time in Patent Office: Days
• US Class Current: 604/19
• CPC Class Codes: A61M 2005/3123 having air entrapping or venting means, e.g. purging channels in pistons
• CPC Class Codes: A61M 2005/3128 Incorporating one-way valves, e.g. pressure-relief or non-return valves
• CPC Class Codes: A61M 5/2046 Media being expelled from injector by gas generation, e.g. explosive charge
• CPC Class Codes: A61M 5/30 Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
• CPC Class Codes: A61M 5/3007 with specially designed jet passages at the injector's distal end
• CPC Class Codes: A61M 5/484 Regulating injection pressure

Abstract

An injection device includes a housing having a proximal end and a distal end, the housing defining a distal opening, and a first opening in a side of the housing and between the proximal and distal ends; a propellant disposed inside the housing and spaced from the distal end; and a movable member disposed inside the housing and between the distal end and the propellant, wherein the propellant is in fluid communication with the movable member and the first opening.

Claims

1. An injection device, comprising:

a housing having a proximal end and a distal end, the housing defining

a distal opening, and

a first opening in a side of the housing and between the proximal and distal ends;

a propellant disposed inside the housing and spaced from the distal end; and

a movable member disposed inside the housing and between the distal end and the propellant,

wherein the propellant is in fluid communication with the movable member and the first opening.

2. The device of claim 1, wherein the propellant is capable of forming a gas capable of moving the movable member in a distal direction and flowing through the first opening to the exterior of the housing.

3. The device of claim 1, wherein the movable member comprises a piston defining a cavity, and the propellant is in fluid communication with the cavity.

4. The device of claim 3, wherein the movable member further defines a second opening in fluid communication with the first opening.

5. The device of claim 4, further comprising a hollow sleeve configured to mate with the piston, the sleeve defining a second cavity in fluid communication with the propellant.

6. The device of claim 5, wherein the sleeve further defines a third opening alignable with the second opening.

7. The device of claim 6, wherein the sleeve further defines a groove, and the third opening is disposed in the groove.

8. The device of claim 1, further comprising

a button at the proximal end of the housing;

a battery inside the housing and adjacent to the button;

electrical leads in electrical communication with the battery; and

a wire in electrical communication with the electrical leads, the wire configured to trigger the propellant.

9. The device of claim 1, wherein the distal opening of the housing is configured to mate with a proximal end of a syringe.

10. The device of claim 9, wherein the syringe comprises a plunger, and the movable member is configured to move the plunger in a distal direction.

11. The device of claim 1, wherein the propellant comprises a chemical pyrotechnic material.

12. The device of claim 1, wherein the housing is composed of a plurality of detachable housings.

13. The device of claim 1, wherein the device is a needleless injection device.

14. An injection device, comprising:

a housing having a proximal end and a distal end, the housing defining

a distal opening, and

a first opening in a side of the housing and between the proximal and distal ends;

a propellant disposed inside the housing and spaced from the distal end;

a sleeve disposed inside the housing and between the distal end and the propellant, the sleeve defining a second opening and a first cavity, the second opening and the first cavity in fluid communication with the propellant; and

a piston mateable with the sleeve and movable in a distal direction, the piston defining a third opening alignable with the second opening,

wherein the propellant is in fluid communication with the first opening when the second and third openings are aligned.

15. The device of claim 14, wherein the propellant is capable of forming a gas capable of flowing through the first cavity to move the piston, wherein the gas flows through the second and third openings when aligned, and through the first opening.

16. The device of claim 14, wherein the piston is coaxial with the sleeve and slidable over the sleeve to align the second and third openings.

17. The device of claim 14, wherein the piston defines a plurality of openings alignable with the second opening.

18. The device of claim 14, wherein the sleeve defines a groove, the second opening disposed in the groove.

19. The device of claim 18, wherein the groove is annular.

20. The device of claim 14, wherein the distal opening of the housing is configured to mate with a syringe comprising a plunger, and the piston is configured to move the plunger.

21. The device of claim 14, further comprising

a button at the proximal end of the housing;

a battery inside the housing and adjacent to the button;

electrical leads in electrical communication with the battery; and

a wire in electrical communication with the electrical leads, the wire configured to trigger the propellant.

22. The device of claim 14, wherein the housing further defines an elongate passageway between the first opening and the third opening.

23. The device of claim 14, wherein the propellant comprises a chemical pyrotechnic material.

24. The device of claim 23, further comprising a filter between the propellant and the first cavity.

25. The device of claim 14, wherein the housing is composed of a plurality of detachable housings.

26. The device of claim 14, wherein the device is a needleless injection device.