Abstract: An injection device, comprising an interface for mounting on a syringe body, the interface comprising an internal passage delimited by an inner wall, a needle and a sheath for receiving said needle, said sheath comprising an outer wall provided with a contact portion of said sheath in contact with an attachment portion of the inner wall of the interface, wherein the contact portion comprises a first bead and in that the attachment portion comprises a second bead, the first and second beads each forming a ring protruding respectively on the contact portion and the attachment portion, the first bead being in contact with the second bead.

Abstract: A syringe is provided with a body, a piston capable of sliding in the body, and an injection device comprising a needle oriented along a longitudinal axis and a casing removably secured to the body and carrying said needle, the casing comprising a plurality of flexible tabs each provided with a stop, the piston comprising a docking system provided with a housing that comprises a flange configured to hold the stops of the flexible tabs in the housing in an insertion position in which the tabs are inserted into the housing, the plurality of tabs comprising a first tab and a second tab situated in opposing areas around the longitudinal axis, the flange comprising a first bearing area and a second bearing area configured to be in contact respectively with the first tab and the second tab in the insertion position.

Abstract: A syringe provided with a body, a piston capable of sliding in the body, and an injection device comprising a needle oriented along a longitudinal axis and a casing removably secured to the body and carrying said needle. The casing comprising a plurality of flexible tabs, each provided with a stop. The piston comprising a docking system having a housing comprising a flange configured to hold the stops of the flexible tabs in the housing in an insertion position in which the tabs are inserted into the housing, the plurality of tabs in opposing areas around the longitudinal axis. The flange comprising bearing areas configured to be in contact with corresponding tabs in the insertion position. The tabs are configured to exert an elastic pressure on corresponding bearing areas in the insertion position, and the bearing areas are dissymmetrical relative to the longitudinal axis.

Abstract: An injection device, comprising an interface for mounting on a syringe body, the interface comprising an internal passage delimited by an inner wall, a needle and a sheath for receiving said needle, said sheath comprising an outer wall provided with a contact portion of said sheath in contact with an attachment portion of the inner wall of the interface, wherein the contact portion comprises a first bead and in that the attachment portion comprises a second bead, the first and second beads each forming a ring protruding respectively on the contact portion and the attachment portion, the first bead being in contact with the second bead.

Abstract: A syringe provided with a body, a piston capable of sliding in the body, and an injection device comprising a needle oriented along a longitudinal axis and a casing removably secured to the body and carrying said needle. The casing comprising a plurality of flexible tabs, each provided with a stop. The piston comprising a docking system having a housing comprising a flange configured to hold the stops of the flexible tabs in the housing in an insertion position in which the tabs are inserted into the housing, the plurality of tabs in opposing areas around the longitudinal axis. The flange comprising bearing areas configured to be in contact with corresponding tabs in the insertion position. The tabs are configured to exert an elastic pressure on corresponding bearing areas in the insertion position, and the bearing areas are dissymmetrical relative to the longitudinal axis.

Abstract: A medical device such as a syringe (10) includes a retractable needle (20) and a tilting system (52). A tilting system (52) includes a deflector in the form of a ramp (83) for deflecting legs (66) of a needle retainer (18) of the device away from a longitudinal axis (90) thereof.

Abstract: A locking mechanism 10 for a medical sharp device such as a syringe assembly 62 includes a retainer part 12 for retaining a hypodermic needle 22, and a connector part 14. The retainer part includes lugs 46 for engagement with a recess 82 formed in a neck 70 of the syringe assembly. When a plunger 72 of the syringe assembly is pushed fully forwards, the lugs 56 of the retainer part 12 engage behind a ledge 54 of the connector part 14 and the lugs 46 disengage from the recess 82. The plunger 72 may then be retracted, pulling the needle 22 into the barrel 64 of the assembly. The neck portion may be eccentrically mounted on the barrel and means 116,118 may be provided for preventing rotation of the plunger 72 in the barrel 64.

Abstract: A locking mechanism 10 for a medical sharp device such as a syringe assembly 62 includes a retainer part 12 for retaining a hypodermic needle 22, and a connector part 14. The retainer part includes lugs 46 for engagement with a recess 82 formed in a neck 70 of the syringe assembly. When a plunger 72 of the syringe assembly is pushed fully forwards, the lugs 56 of the retainer part 12 engage behind a ledge 54 of the connector part 14 and the lugs 46 disengage from the recess 82. The plunger 72 may then be retracted, pulling the needle 22 into the barrel 64 of the assembly. The neck portion may be eccentrically mounted on the barrel and means 116,118 may be provided for preventing rotation of the plunger 72 in the barrel 64.