Patent ID: 7931618
Filing Date: 2011-04-26
Classification: A61M

Abstract:
1. An apparatus for injecting fluid medicine, comprising: a tube including a barrel and a nose cap attached thereto; a receiving cavity within the tube; a syringe subassembly within the receiving cavity, the syringe subassembly including a reservoir, an injection needle, a hub between the reservoir and the injection needle, and a resilient cushion on the hub; a driver adjacent one end within the tube; a penetration controller adjacent another end within the tube opposite the one end, the penetration controller including a control sleeve that is removable from the tube and a spring within the control sleeve radially between the control sleeve and a part of the syringe subassembly; the control sleeve having an abutment surface at one end, another end opposite the one end, and an inside diameter; the spring having an enlarged portion with an outside diameter greater than the inside diameter of the control sleeve; the enlarged portion of the spring being retained between the other end of the control sleeve and the nose cap; and the resilient cushion being located axially between the abutment surface and at least a part of the hub.