Medicament cartridge assembly

摘要

An adaptor top for a medicament cartridge, the medicament cartridge including a cylinder having a main body portion, a neck portion at a first end having a radially outwardly directed flange portion, a narrowing shoulder portion connecting the body portion and the neck portion, a cap beaded across the first end thereby to retain a fluid impermeable membrane, and the adaptor top comprising a first cylindrical body portion having a radially inwardly directed flange at one end, in use to be seated over and against the cap and a second cylindrical skirt portion being adapted, in use, to be seated against the shoulder portion of the cartridge, the second skirt portion including a plurality of fingers, the free ends of the fingers in use being adapted to be seated beneath the outwardly directed flange of the medicament cartridge.

主权项

1. A medicament cartridge assembly comprising an adaptor top and a medicament cartridge,
the medicament cartridge comprising a cylinder having a main body portion, a neck portion at a first end having a radially outwardly directed flange portion, a narrowing shoulder portion connecting the body portion and the neck portion, a cap beaded across the first end thereby to retain a fluid impermeable membrane, the adaptor top comprising a first cylindrical body portion having a radially inwardly directed flange at one end being seated over and against the cap, and a second skirt portion being seated against the shoulder portion of the cartridge, the second skirt portion including a plurality of fingers, free ends of the fingers being seated beneath the outwardly directed flange of the medicament cartridge and being plastically deformed to prevent a removal of the adaptor top from the medicament cartridge without damaging the fingers, the second skirt portion having an outer side face being inclined relative to a longitudinal axis of the cartridge and having at one end a radially outwardly directed flange seated against the shoulder portion of the cartridge, an outer face of the flange is substantially normal to the longitudinal axis of the cartridge, the outer side face is between the plurality of fingers and the flange and the outer side face is inclined outwardly toward the flange, the adaptor top further comprising a screw thread that enables the medicament cartridge assembly to be received and secured within a medicament delivery apparatus, the screw thread being formed integrally with the first cylindrical body portion, and the screw thread being located between the radially inwardly directed flange and the radially outwardly directed flange portion, and when the medicament cartridge assembly is received and secured within the medicament delivery apparatus and when a needle unit pierces the fluid impermeable membrane, a dispense of contents of the medicament cartridge is enabled.