Patent ID: 7677419

Claim:
A syringe for use with a fluid, the syringe comprising: a barrel including a first opening, a second opening from which the fluid is dispensed, a sidewall between said first and second openings, an inwardly-facing surface on said sidewall, and a plurality of axial grooves defined in said inwardly-facing surface, said inwardly-facing surface and said axial grooves configured to be contacted by the fluid, said inwardly-facing surface centered about a longitudinal axis extending from said first opening to said second opening, and said axial grooves extending along said inwardly-facing surface substantially parallel to said longitudinal axis from a first location on said inwardly-facing surface proximate to said first opening to a second location on said inwardly-facing surface proximate to said second opening; and a piston disposed inside said sidewall of said barrel to define a fluid chamber between said piston and said second opening that is in fluid communication with said second opening, said piston having a periphery that provides a fluid seal with said axial grooves to inhibit fluid leakage from said fluid chamber between said piston and said inwardly-facing surface as said piston is advanced toward said second opening to dispense the fluid from said fluid chamber through said second opening.