Patent ID: 8672902
Filing Date: 2014-03-18
Classification: A61M

Abstract:
1. A hub assembly for an injection apparatus, comprising: a cover having outer and inner surfaces; a hub disposed in said cover and having first and second ends and outer and inner surfaces, an opening being formed at said first end and threads being formed on said inner surface proximal said second end to facilitate connecting said hub assembly to a cartridge of said injection apparatus; a plurality of radially extending protrusions formed on said outer surface of said hub; at least one radially extending rib formed on said inner surface of said cover such that said at least one rib is disposed between adjacent protrusions when said hub is disposed in said cover; each of said plurality of protrusions and said at least one rib having mating sloped surfaces to facilitate movement of said at least one rib over said plurality of protrusions; a first tooth formed on each of said sloped surfaces of said plurality of protrusions; and a second tooth formed on said sloped surface of said at least one rib, such that an audible indicia is generated when said second tooth of said at least one rib passes over said first tooth of said plurality of protrusions when said hub assembly is properly connected with the cartridge, thereby indicating to the user that said hub assembly and the cartridge are properly connected.