Patent ID: 11911591
Assignee: SANOFI-AVENTIS DEUTSCHLAND GMBH
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 15:
16. A method of operating a drug delivery device, the method comprising:
mounting a disposable cartridge to the drug delivery device, wherein the disposable cartridge comprises:
a flexible bag to accommodate a liquid medicament and having a sidewall and an opening adjacent to the sidewall,
a socket having a fluid channel in fluid communication with a cartridge fluid coupling, wherein the socket extends into the opening of the flexible bag and comprises an outside facing portion,
a housing comprising an inside facing sidewall portion complementary shaped to the outside facing portion of the socket, wherein the outside facing portion and the inside facing sidewall portion comprises one of a circular shape, a cylindrical shape, an oval shape, an elliptical shape, a rectangular shape, a flattened round shape, or a flattened oval shape, the inside facing sidewall portion completely covering the flexible bag and having a receptacle to receive the socket with the flexible bag, wherein the sidewall of the flexible bag is fixed between the socket and the receptacle,
a circumferentially extending groove in the outside facing portion of the socket, wherein the circumferentially extending groove extends all around the outside facing portion of the socket, and
a sealing ring arranged in the circumferentially extending groove,
wherein the flexible bag is sealingly press fitted between the sealing ring and the inside facing sidewall portion of the housing, wherein the sealing ring is mechanically squeezed between the outside facing portion of the socket and the inside facing sidewall portion of the housing;

establishing fluid communication between the flexible bag within the housing of the disposable cartridge and an injection needle; and
activating the drug delivery device to deliver the liquid medicament from the flexible bag.