Patent ID: 7854721

Claim:
A syringe assembly comprising a syringe body member forming a syringe barrel having a syringe passageway passing through the length thereof; a discharge port being smaller in diameter than the syringe passageway and communicating with the syringe passageway at a front end thereof; at least one elastic plunger member having a non-circular cross-section situated in the syringe barrel and dividing said syringe passageway into at least a first chamber at the front end of said syringe passageway and a second chamber at the back end of said syringe passageway, and a plunger rod for actuating said plunger member; said at least one plunger member being adapted for being rotated by turning the plunger rod around its longitudinal axis to cause compression of the plunger member, whereby the plunger member establishes a flow connection between said chambers due to the compression of the plunger member.