Medicament cartridge
View Patent ↗Many of those having diabetes take a combination of slow and fast acting types of insulin. It is important that the different forms of medicament do not become confused. To this end, a medicament cartridge is provided comprising a sleeve having a bottleneck providing a flange at a first end, a fluid impermeable membrane secured across the first end by a metal cap beaded beneath the flange, and a displaceable piston located internally of the sleeve towards a second end of the sleeve, a collar located against an external periphery of the cartridge housing beneath the flange and an adaptor top press fit over the cap and the collar, the adaptor top being provided with means to act upon the collar thereby to retain the adaptor top on the sleeve.
1. A medicament cartridge comprising:
a sleeve having a first end and a second end;
a bottleneck disposed at the second end;
a flange disposed at the bottleneck;
a cap;
a fluid impermeable membrane secured across the second end by the cap, the cap being beaded beneath the flange;
a displaceable piston located internally of the sleeve towards the first end of the sleeve;
a collar located against an external periphery of the sleeve beneath the flange and having a lower surface; and
an adaptor top in a press fit over the cap and the collar, the adaptor top having means that act upon the collar to retain the adaptor top on the sleeve, the means being directed radially inwardly of the adaptor top to abut with the lower surface of the collar.
2. A medicament cartridge according to claim 1 , wherein the collar is adhered to the sleeve.
3. A medicament cartridge according to claim 1 , wherein the collar is defined by a first inner surface that conforms to a peripheral surface of the sleeve and a second outer surface.
4. A medicament cartridge according to claim 3 , wherein the second outer surface provides a smooth rounded surface.
5. A medicament cartridge according to claim 1 , wherein the collar is formed as a hinged member.
6. A medicament cartridge according to claim 1 , wherein the collar has a first end provided with a male coupling and a second end provided with a female coupling to receive the male coupling.
7. A medicament cartridge according to claim 1 , wherein the cap is a metal cap.
8. A medicament cartridge according to claim 1 , the adapter top comprising means by which a needle unit may be secured to the medicament cartridge.