A safety syringe includes an outer barrel having a receiving groove located on an inner surface of a rear end thereof between a first annular flange and a second annular flange, an inner barrel having a needle mount located on a front end thereof and a positioning portion adjacent to the needle mount, and a plunger axially movably inserted into the inside of the inner barrel.

An interface of the needle of a medical syringe and realizes that a conical fitting and a conical inclined surface of a syringe barrel and a conical lip and a conical hole of the needle form an interface of the needle; when the conical hole of the needle is plugged onto the conical fitting of the syringe barrel, the needle is fixed onto the conical fitting of the syringe barrel to achieve the purpose of preventing a needle tip from swinging when the needle pierces a muscle or a blood vessel of a human body, so as to avoid misoperation; and after the medical syringe is used, the conical lip of the needle distal away from the needle tip only needs to be pinched flat, the needle can then be separated from the conical fitting of the syringe barrel of the medical syringe.

Proposed is a syringe for dermis regeneration, the syringe including: an injection unit having a first space therein and being open at a rear end portion, the first space being filled with a liquid or a gas and communicating with the outside; a needle combined with a front end portion of the injection unit and having a space therein, the space communicating with the first space; a liquid supply unit having a first end portion removably combined with the rear end portion, having a second end portion through which a piston moves, and having a space therein, the space being filled with the liquid and communicating with the first space, and the piston being inserted into the liquid supply unit; and a gas injection port passing through a sidewall of the injection unit and communicating with the first space to allow the first space to be filled with the gas.

An interface of the needle of a medical syringe and realizes that a conical fitting and a conical inclined surface of a syringe barrel and a conical lip and a conical hole of the needle form an interface of the needle; when the conical hole of the needle is plugged onto the conical fitting of the syringe barrel, the needle is fixed onto the conical fitting of the syringe barrel to achieve the purpose of preventing a needle tip from swinging when the needle pierces a muscle or a blood vessel of a human body, so as to avoid misoperation; and after the medical syringe is used, the conical lip of the needle distal away from the needle tip only needs to be pinched flat, the needle can then be separated from the conical fitting of the syringe barrel of the medical syringe.

A syringe assembly including: (1) a syringe barrel defining a chamber; (2) a plunger mounted in the chamber and moveable with respect to the barrel; and (3) a cap holder assembly containing a cap and an absorbent material removably attached to the syringe.

Embodiments including an injection device having a housing with an outer surface, an inner surface, a proximal end and a distal end, and a defining a chamber extending between the proximal end and the distal end are provided herein. The device may include a plunger having a first end and a second end, the plunger being movable proximally and distally within the chamber of the housing, the plunger comprising a plunger rod extending from the first end to the second end of the plunger; and a plunger limiting mechanism configured to interface with the plunger rod, to limit the proximal movement of the plunger and prevent removal of the plunger from the housing.

A liquid dispensing system for oral administration comprises a dispenser (16,18,20) and cartridges (14) from which medicine is dispensed. Each cartridge (14) includes a hollow shell (22,24) with a septum (26) at one end, a piston (28) at the other end, and the medicine in a cavity (23) between the septum and the piston. The dispenser includes receiver (20) in which a cartridge (14) is received, a plunger (18) that can slide relative to the receiver and that has a plunging head (52) that can drive the piston (28), and a barrel (16) in which the cartridge (14), receiver (20) and plunger (18) can be received, at least partly. Once a cartridge (14) has been inserted into the receiver (20), the receiver and cartridge are inserted into the barrel (16) and a piercing head (44) ruptures the septum (26). The plunger (18) is pushed to drive the piston (28) and the medicine is dispensed by the piston, through a discharge passage (42) of the barrel (16). The septum (26) can hinge on a hinge formation (86) to act as a one-way valve to prevent unintentional flow of liquid from the cartridge.

Syringe assemblies are provided including a partially pre-filled syringe barrel and a plunger rod that incorporates one or more retention elements on the plunger rod that prevents solution from entering a non-sterile area of the syringe when the plunger rod is pulled back. Methods to manufacture a sterilized partially-filled pre-fill syringe assembly are also disclosed.

A syringe comprising: a body delimiting a chamber; a piston able to slide in the chamber of the body along a longitudinal axis of the syringe, wherein the piston comprises a rod, a head, and a finger rest, which are all in one piece; and a deformable retention device designed to prevent the piston from leaving the body entirely, wherein the retention device is force-fitted in the chamber, extends around the piston over an angular sector strictly greater than 180 when it is in the assembled position, and has protruding external ribs which extend parallel to the longitudinal axis and are plastically deformable when the retention device is assembled in the chamber.

A syringe assembly including: (1) a syringe barrel defining a chamber; (2) a plunger mounted in the chamber and moveable with respect to the barrel; and (3) a cap holder assembly containing a cap and an absorbent material removably attached to the syringe.