Patent ID: 6123685
Filing Date: 2000-09-26
Classification: A61M

Abstract:
A syringe comprising a syringe body, a piston (6) which is formed in two separate parts in longitudinal tandem within the syringe body (2), wherein the piston parts are a detached imperforate front part (6A) formed essentially of elastomeric material and nearer a forward end of the syringe body, and a normally abutting rear part (6B) defining a passageway for establishing communication between rear and front surfaces of that rear part, only the rear part having at its rear surface, surrounding the passageway, a connector (18) for connection of a syringe actuator when the syringe is used, wherein a retainer is engaged with a rear end of the syringe body to restrain the rear part (6B) against expulsion from the syringe body, said retainer defining an opening through which said connector is accessible to an actuator, and wherein the connector is configured to provide a fluid connection between said passage in said rear part and a pressurized fluid source in an actuator, and a mechanical coupling between said rear part and an actuator, whereby by selection of a suitable actuator, said connector provides one of means for mechanically actuating the syringe by application of mechanical pressure to the rear piston part, and means for fluid actuation of the syringe by allowing fluid to be introduced between said piston parts through said passageway.