Biasing mechanism for a drug delivery device
First Claim
1. A biasing element configured for biasing a cartridge in a cartridge housing of a drug delivery device, said cartridge housing configured to be secured to a dose setting mechanism, wherein said cartridge comprises a bung at a first end of said cartridge and a pierceable seal at a second end of said cartridge;
- wherein the biasing element comprises a first connection side loop and a second connection side loop flexibly coupled to said first connection side loop, wherein said first and second connection side loops are disposed at opposite ends of said biasing element and are flexible in a direction radial to a longitudinal axis of said cartridge housing such that at least one portion of said biasing element is configured to be self retained by an internal surface of said drug delivery device, and wherein said biasing element resides in a compressed state when biasing said cartridge in said cartridge housing.
1 Assignment
0 Petitions
Accused Products
Abstract
A method and system for biasing a cartridge in a drug delivery device. An element for biasing a cartridge in a cartridge housing of a drug delivery device is provided. This non-plastic element does not comprise a coil spring. A self retained element for providing a spring bias to a cartridge in a cartridge holder of a drug delivery device comprises a first member having a shape that allows passage of a spindle of the drug delivery device. A portion of the first member is self retained by an internal surface of the drug delivery device. The self retained element biases the cartridge against an inner surface of the cartridge holder. This cartridge could be a removable cartridge.
27 Citations
12 Claims
-
1. A biasing element configured for biasing a cartridge in a cartridge housing of a drug delivery device, said cartridge housing configured to be secured to a dose setting mechanism, wherein said cartridge comprises a bung at a first end of said cartridge and a pierceable seal at a second end of said cartridge;
- wherein the biasing element comprises a first connection side loop and a second connection side loop flexibly coupled to said first connection side loop, wherein said first and second connection side loops are disposed at opposite ends of said biasing element and are flexible in a direction radial to a longitudinal axis of said cartridge housing such that at least one portion of said biasing element is configured to be self retained by an internal surface of said drug delivery device, and wherein said biasing element resides in a compressed state when biasing said cartridge in said cartridge housing.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
Specification