Patent ID: 6916308

Claim:
A syringe comprising: a chamber for receiving a plunger of an actuator, the plunger being movable axially with respect to the chamber when the actuator is operated; a connector to be fixed relative to the chamber and to facilitate entry of the plunger into the chamber, and a viscoselective high pressure seal associated with the plunger, wherein the plunger comprises a distal tip portion adapted to define the viscoselective high pressure seal, the distal tip portion comprising a seal member therearound so sized for its radially outwardly directed surface to assuredly sealingly engage an inside surface of the chamber during an application procedure but movable therealong during actuation of the plunger, and at least one relatively small aperture extends longitudinally within the plunger tip portion from distally of the seal member to proximally thereof, passing under the seal member, the aperture being sufficiently small to effectively inhibit passage of viscous material therealong and define an air escape vent.