Patent ID: 8511517
Filing Date: 2013-08-20
Classification: A61M

Abstract:
1. A protective sleeve for use in a syringe having a cylinder with a first and second ends, a piston assembly, an output at the first end and an opening for a shaft at the second end of the cylinder, the protective sleeve comprising: a tube having a first end and a second end, the second end opposing the first end, the tube configured to compress and expand along a longitudinal axis of the tube, the sleeve made of a resilient material that is placed within the cylinder behind the piston assembly; a first lip formed at one end of the tube shape that is configured to engage the piston assembly and to move with the piston assembly, the first lip having: a second lip formed at the second end of the tube shape that is configured to be retained at the second end of the cylinder, wherein the collapsible tubular shape is configured to extend and collapse as the piston assembly moves, the second lip having the first lip radial portion configured to be captured between a shoulder of the shaft and an extension portion of the piston assembly; and the second lip radial portion configured to be captured between a retaining plate and the second end of the cylinder.