Abstract: A syringe assembly (10) has a syringe barrel (12), a plunger rod (14) and stopper (16) where the syringe barrel has an open end receiving the plunger rod and stopper in a sliding direction. The plunger rod includes a shaft (52) having a longitudinal axis with a first end having a coupling member (62) for coupling with the stopper. The shaft has a least one plunger rod support (82) extending radially outer from the shaft and spaced from the first end for cooperating with an inner surface of the syringe barrel (12) to resist lateral movement and tilting of the plunger rod relative to the longitudinal axis of the axial passage of the syringe barrel. The shaft in one embodiment has at least two spaced apart points of support (41) and (82) for maintaining the axis of the plunger rod on axis with the syringe barrel to limit twisting and tilting of the stopper thereby resisting distortion of the stopper that can cause leakage.

Abstract: A syringe assembly (10) has a syringe barrel (12), a plunger rod (14) and stopper (16) where the syringe barrel has an open end receiving the plunger rod and stopper in a sliding direction. The plunger rod includes a shaft (52) having a longitudinal axis with a first end having a coupling member (62) for coupling with the stopper. The shaft has a least one plunger rod support (82) extending radially outer from the shaft and spaced from the first end for cooperating with an inner surface of the syringe barrel (12) to resist lateral movement and tilting of the plunger rod relative to the longitudinal axis of the axial passage of the syringe barrel. The shaft in one embodiment has at least two spaced apart points of support (41) and (82) for maintaining the axis of the plunger rod on axis with the syringe barrel to limit twisting and tilting of the stopper thereby resisting distortion of the stopper that can cause leakage.

Abstract: A medical needle device which is reusable and cooperates with a disposable needle assembly. The medical needle device includes a holder, a needle assembly, and an ejector rod cooperating with the holder. The needle assembly includes a needle hub and needle. The holder has a proximal end and a distal end and defines an opening extending therethrough. The distal end has a hub socket for receiving the hub of the needle, with the needle hub received in the socket. The ejector extends into the opening from the proximal end of the holder. The ejector rod is slidably received in the holder and has a distal end configured to engage the needle hub, and a proximal end extending outward from the holder. The ejector rod is used to eject the needle assembly from the holder.

Abstract: A shieldable unit dose needle assembly including a unit dose needle, a shield in pivotal engagement with respect to the needle, and a collar providing pivotal engagement between the needle and the shield. The shield is pivotally movable between a retracted position and a shielded position in which a portion of the shield encompasses the unit dose needle for safety purposes. The collar further includes a handle for holding the needle assembly during use, which handle may include a profile for accommodating a user's fingers.

Abstract: A medical needle device which is reusable and cooperates with a disposable needle assembly. The medical needle device includes a holder, a needle assembly, and an ejector rod cooperating with the holder. The needle assembly includes a needle hub and needle. The holder has a proximal end and a distal end and defines an opening extending therethrough. The distal end has a hub socket for receiving the hub of the needle, with the needle hub received in the socket. The ejector extends into the opening from the proximal end of the holder. The ejector rod is slidably received in the holder and has a distal end configured to engage the needle hub, and a proximal end extending outward from the holder. The ejector rod is used to eject the needle assembly from the holder.

Abstract: A shieldable, single-use unit dose needle assembly for administering a unit dose of a vaccine includes a unit dose needle attached to a base with a sleeve slidably attached thereto. The sleeve includes a guide slot that extends through the tubular sleeve wall. The base includes a tab disposed on an outer surface and extends through and beyond the guide slot. The unit dose needle includes a base end attached to the base and an opposed prong end configured to hold a unit dose of a vaccine. The needle assembly is configured such that movement of the tab through the guide slot enables an extension and a retraction movement of the needle between an extended position with the needle extending from the distal end of the sleeve and a retracted position with the needle contained within the internal sleeve opening.