Abstract: A syringe assembly includes a syringe barrel having an inside surface defining a chamber, an open proximal end, a distal end, and an outlet; a plunger assembly disposed at least partially within the syringe barrel, including an elongate plunger rod having a locking flange formed thereon; and a plunger head having a distal sealing surface, the plunger rod being engageable with the plunger head such that the plunger rod is adapted to move the plunger head within the chamber of the syringe barrel through an injection cycle; and a flange lock disposed at the open proximal end of the barrel. The flange lock is integral with the open proximal end of the syringe barrel. During the injection cycle, the flange lock engages the locking flange of the plunger rod so as to prevent removal of the plunger rod from the syringe barrel.

Abstract: A syringe assembly includes a syringe barrel having an inside surface defining a chamber and an outlet. A plunger assembly is disposed within the syringe barrel and includes an elongate plunger rod having a distal end surface, a plunger head having a distal sealing surface and a proximal end surface having a continuous perimeter, and a breakable neck portion integrally connecting the plunger rod and the plunger head. A retaining ring lock is disposed on the inside surface of the barrel and defines an engagement surface about a perimeter of the chamber. The retaining ring lock is adapted to engage and retain the plunger head in a locked position within the chamber. The engagement surface of the retaining ring lock engages the continuous perimeter of the proximal end surface of the plunger head in a perimetrical engagement when the plunger head is in the locked position.

Abstract: A shieldable unit dose assembly includes a needle holding member, a safety shield member disposed around the needle holding member, and a unit dose needle including a hub which is connected to the needle holding member. The needle holder member includes a male tapering surface and the hub of the unit dose needle includes a female tapering surface for connection therebetween. The unit dose needle includes a solid elongated unit dose needle having a patient end for containing and administering a unit dose of a vaccine. The telescoping safety shield member is disposed around the needle holding member, and is axially movable from a non-shielding position surrounding at least a portion of the needle holding member to a telescoped shielding position encompassing the patient end of the unit dose needle. The safety shield member may be locked into the shielding position.

Abstract: Various embodiments of syringe assemblies include a syringe barrel and a substantially conical tip or outlet disposed on the distal end of the barrel. The substantially conical tip includes a locking mechanism that engages an extension of a plunger assembly extending from a distal end of the plunger assembly so as to retain the extension within the substantially conical tip or outlet upon full injection of the contents of the syringe to a patient. According to one embodiment, a plunger head of the plunger assembly is slidably disposed on the extension. According to another embodiment, a separate hub, which holds a needle cannula, is disposed on an outlet at the distal end of the syringe barrel, which contains the locking mechanism. According to a further embodiment, the locking mechanism includes a locking clip disposed within the substantially conical tip of the syringe assembly.

Abstract: A syringe assembly includes a syringe barrel having an inside surface defining a chamber, an open proximal end, a distal end, and an outlet; a plunger assembly disposed at least partially within the syringe barrel, including an elongate plunger rod having a locking flange formed thereon; and a plunger head having a distal sealing surface, the plunger rod being engageable with the plunger head such that the plunger rod is adapted to move the plunger head within the chamber of the syringe barrel through an injection cycle; and a flange lock disposed at the open proximal end of the barrel. The flange lock is integral with the open proximal end of the syringe barrel. During the injection cycle, the flange lock engages the locking flange of the plunger rod so as to prevent removal of the plunger rod from the syringe barrel.

Abstract: A syringe assembly includes a syringe barrel having an inside surface defining a chamber, an open proximal end, a distal end, and an outlet; a plunger assembly disposed at least partially within the syringe barrel, including an elongate plunger rod having a locking flange formed thereon; and a plunger head having a distal sealing surface, the plunger rod being engageable with the plunger head such that the plunger rod is adapted to move the plunger head within the chamber of the syringe barrel through an injection cycle; and a flange lock disposed at the open proximal end of the barrel. The flange lock is integral with the open proximal end of the syringe barrel. During the injection cycle, the flange lock engages the locking flange of the plunger rod so as to prevent removal of the plunger rod from the syringe barrel.

Abstract: A syringe assembly includes a syringe barrel having an inside surface defining a chamber, an open proximal end, a distal end, and an outlet; a plunger assembly disposed at least partially within the syringe barrel, including an elongate plunger rod having a locking flange formed thereon; and a plunger head having a distal sealing surface, the plunger rod being engageable with the plunger head such that the plunger rod is adapted to move the plunger head within the chamber of the syringe barrel through an injection cycle; and a flange lock disposed at the open proximal end of the barrel. The flange lock is integral with the open proximal end of the syringe barrel. During the injection cycle, the flange lock engages the locking flange of the plunger rod so as to prevent removal of the plunger rod from the syringe barrel.

Abstract: Various embodiments of syringe assemblies include a syringe barrel and a substantially conical tip or outlet disposed on the distal end of the barrel. The substantially conical tip includes a locking mechanism that engages an extension of a plunger assembly extending from a distal end of the plunger assembly so as to retain the extension within the substantially conical tip or outlet upon full injection of the contents of the syringe to a patient. According to one embodiment, a plunger head of the plunger assembly is slidably disposed on the extension. According to another embodiment, a separate hub, which holds a needle cannula, is disposed on an outlet at the distal end of the syringe barrel, which contains the locking mechanism. According to a further embodiment, the locking mechanism includes a locking clip disposed within the substantially conical tip of the syringe assembly.

Abstract: A syringe assembly having passive disabling structure includes a barrel and a plunger rod assembly. The plunger rod assembly includes a plunger rod and a stopper connected by an indexing locking element. The number of strokes of the syringe plunger before the stopper is locked into the barrel rendering the syringe assembly unusable is determined by the number of detents on the plunger rod and stopper which engage the locking mechanism. Upon completion of the final delivery stroke, any attempt to withdraw the plunger rod from the barrel will cause the locking element to engage the barrel and trap the stopper in the barrel preventing further use of the syringe.

Abstract: A syringe assembly includes a syringe barrel having an inside surface defining a chamber and an outlet. A plunger assembly is disposed within the syringe barrel and includes an elongate plunger rod having a distal end surface, a plunger head having a distal sealing surface and a proximal end surface having a continuous perimeter, and a breakable neck portion integrally connecting the plunger rod and the plunger head. A retaining ring lock is disposed on the inside surface of the barrel and defines an engagement surface about a perimeter of the chamber. The retaining ring lock is adapted to engage and retain the plunger head in a locked position within the chamber. The engagement surface of the retaining ring lock engages the continuous perimeter of the proximal end surface of the plunger head in a perimetrical engagement when the plunger head is in the locked position.

Abstract: A shieldable unit dose needle assembly including a needle holding member, 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 needle holding member includes a distal end having a male tapering surface. The collar further includes a proximal end having a female tapering surface in engagement with the male tapering surface of the needle holding member.

Abstract: A syringe assembly having passive disabling structure includes a barrel and a plunger rod assembly. The plunger rod assembly includes a plunger rod and a stopper connected by an indexing locking element. The number of strokes of the syringe plunger before the stopper is locked into the barrel rendering the syringe assembly unusable is determined by the number of detents on the plunger rod and stopper which engage the locking mechanism. Upon completion of the final delivery stroke, any attempt to withdraw the plunger rod from the barrel will cause the locking element to engage the barrel and trap the stopper in the barrel preventing further use of the syringe.

Abstract: A syringe assembly having passive disabling structure includes a barrel and a plunger rod assembly. The plunger rod assembly includes a plunger rod and a stopper connected by an indexing locking element. The number of strokes of the syringe plunger before the stopper is locked into the barrel rendering the syringe assembly unusable is determined by the number of detents on the plunger rod and stopper which engage the locking mechanism. Upon completion of the final delivery stroke, any attempt to withdraw the plunger rod from the barrel will cause the locking element to engage the barrel and trap the stopper in the barrel preventing further use of the syringe.

Abstract: A syringe assembly having passive disabling structure includes a barrel and a plunger rod assembly. The plunger rod assembly includes a plunger rod and a stopper connected by an indexing locking element. The number of strokes of the syringe plunger before the stopper is locked into the barrel rendering the syringe assembly unusable is determined by the number of detents on the plunger rod and stopper which engage the locking mechanism. Upon completion of the final delivery stroke, any attempt to withdraw the plunger rod from the barrel will cause the locking element to engage the barrel and trap the stopper in the barrel preventing further use of the syringe.

Abstract: A shielded, sterile, single-use unit dose needle assembly includes a unit dose needle with a hub and two packaging shields sealingly mated to one another encasing the hub and unit dose needle. The unit dose needle has a handle end and a patient end configured to hold a unit dose of a vaccine. The hub is fixedly attached to the unit dose needle between the handle end and the patient end. The first packaging shield extends over the patient end, and the second packaging shield extends over the handle end of the unit dose needle. The first and second packaging shields are removably attached to one another to form an air-tight sterility seal, with the unit dose needle contained within the first packaging shield.

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 shielded, sterile, single-use unit dose needle assembly includes a unit dose needle with a hub and two packaging shields sealingly mated to one another encasing the hub and unit dose needle. The unit dose needle has a handle end and a patient end configured to hold a unit dose of a vaccine. The hub is fixedly attached to the unit dose needle between the handle end and the patient end. The first packaging shield extends over the patient end, and the second packaging shield extends over the handle end of the unit dose needle. The first and second packaging shields are removably attached to one another to form an air-tight sterility seal, with the unit dose needle contained within the first packaging shield.

Abstract: A shieldable unit dose needle assembly including a needle holding member, 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 needle holding member includes a distal end having a male tapering surface. The collar further includes a proximal end having a female tapering surface in engagement with the male tapering surface of the needle holding member.

Abstract: A shieldable unit dose assembly includes a needle holding member, a safety shield member disposed around the needle holding member, and a unit dose needle including a hub which is connected to the needle holding member. The needle holder member includes a male tapering surface and the hub of the unit dose needle includes a female tapering surface for connection therebetween. The unit dose needle includes a solid elongated unit dose needle having a patient end for containing and administering a unit dose of a vaccine. The telescoping safety shield member is disposed around the needle holding member, and is axially movable from a non-shielding position surrounding at least a portion of the needle holding member to a telescoped shielding position encompassing the patient end of the unit dose needle. The safety shield member may be locked into the shielding position.