Injection devices

• US 20050154350A1
• Filed: 02/22/2005
• Published: 07/14/2005
• Est. Priority Date: 12/18/1998
• Status: Active Grant

• Current Assignee: Valeritas, Inc. (Zealand Pharma A/S)
• Original Assignee: Biovail Laboratories Incorporated (Bausch Health Cos., Inc.)
• Inventors: Willis, John, Minior, Thaddeus, Gonnelli, Robert
• Granted Patent: US 7,740,607 B2
• Time in Patent Office: Days
• US Class Current: 604/89
• CPC Class Codes: A61M 5/2053 Media being expelled from injector by pressurised fluid or vacuum for infusion A61M5/145, A61M5/155
• CPC Class Codes: A61M 5/2066 comprising means for injection of two or more media, e.g. by mixing
• CPC Class Codes: A61M 5/30 Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules

Abstract

Injection devices, such as needleless injection devices, and methods of making and using the same are disclosed.

Claims

1. A piston housing having two modules, for use with an injection device, said housing comprising:

(1) a first module comprising;

a first module housing, a first piston, a first module seal, and a first chamber defined by said first module housing, said first piston, and said first module seal; and

(2) a second module comprising;

a second module housing, a second piston, a second module seal, and a second chamber defined by said second module housing, said second piston, and said second module seal;

wherein said first module is capable of engaging said second module such that said first module seal is disposed proximal and adjacent to said second module seal.

2. The injection device piston housing of claim 1, wherein engagement of said first module with said second module enables communication between said first chamber and said second chamber.

3. The injection device piston housing of claim 1, wherein one or both modules comprises a piercing member for piercing one or both of said first module seal and said second module seal.

4. The injection device piston housing of claim 1, wherein one or both of said first and second module seals are disposed such that upon engagement of said first module and said second module, one or both of said seals are pierced to allow communication between said first chamber and said second chamber.

5. The piston housing of claim 1, wherein said first module further comprises an orifice configured for needless injection.

6. The piston housing of claim 5, wherein said orifice is covered by a removable cap until use.

7. The piston housing of claim 1, wherein said first module further comprises one or more fluid bypass passages that allow fluid communication between said first chamber and said second chamber.

8. The piston housing of claim 7, wherein said first piston is disposed such that it need not be moved relative to said fluid bypass passages to allow communication of said first and said second chambers.

9. The piston housing of claim 7, wherein said first piston is disposed such that it must be displaced relative to said fluid bypass passages to allow communication of said first and said second chambers.