Patent ID: 7077826
Filing Date: 2006-07-18
Classification: A61M

Abstract:
1. A syringe comprising: a) a syringe barrel; b) said syringe barrel having inner walls defining a syringe barrel cavity; wherein said syringe barrel cavity is provided with a forward end port such that materials enter and exit said syringe barrel cavity only through said forward end port; c) a plunger member comprising a plunger shaft and piston, said plunger member positioned within said syringe barrel cavity, said piston of said plunger member contacting said inner walls of said syringe barrel cavity; and d) a sheath positioned within said inner walls of said syringe barrel cavity between the rear terminus of said syringe barrel and the forward terminus of said plunger shaft, said sheath enclosing a portion of said plunger shaft.