Abstract: The present invention relates to an injection syringe with retractable needle, at least comprising: a liquid container with an outlet opening; a needle with needle mount which is or can be secured in or on the outlet opening of the liquid container; a blocking means which is designed to block the needle mount in the outlet opening, which blocking means can only be unblocked by the needle mount with needle being retracted into the liquid container.

Abstract: An infusion or transfusion needle assembly includes a hollow needle fixed to a needle holder. The needle holder is surrounded by a sheath such that the sheath and the needle holder are axially slidable relative to one another. Releasable detent locking means are provided between the needle holder and the sheath to positively prevent axial movement of the needle holder and needle relative to the sheath, thereby locking the needle in an extended position for insertion into the skin of a patient. Unlocking means are provided for releasing the releasable detent locking means, thereby permitting axial movement of the needle holder and needle relative to the sheath so that the needle is movable from the extended position to a fully retracted position within the sheath. Once the needle is fully retracted, permanent detent locking means become operative to positively and permanently maintain the needle in the retracted position.

Abstract: A safety device for an injection syringe comprising an outer casing (1) defining an injection fluid space with a plunger (11) movable therein, said plunger being adapted to be coupled with a plunger rod (6) provided with an actuating knob or ring, while at the opposite end of said casing a needle foot (16) equipped with a hollow needle (15) may be fixed thereto in such a manner that the needle bore communicates with the interior of the fluid space, the needle foot (16) being movable inwards relative to the outer casing and adapted to be coupled to the piston in order that the needle may be retracted into said outer casing; the needle foot (16) and the casing (1) are provided with mutually engageable locking means for locking the needle foot (16) in its non-retracted position, and the plunger (11) or the plunger rod (6) and the needle (15) or the needle foot (16) are provided with means for coupling the plunger (11) or plunger rod (6) with the needle (15) or needle foot (16) and releasing the needle or needle

Abstract: A safety device for an injection syringe comprising an outer casing (1) defining an injection fluid space with a plunger (11) movable therein, said plunger being adapted to be coupled with a plunger rod (6) provided with an actuating knob or ring, while at the opposite end of said casing a needle foot (16) equipped with a hollow needle (15) may be fixed thereto in such a manner that the needle bore communicates with the interior of the fluid space, the needle foot (16) being movable inwards relative to the outer casing and adapted to be coupled to the piston in order that the needle may be retracted into said outer casing; the needle foot (16) and the casing (1) are provided with mutually engageable locking means for locking the needle foot (16) in its non-retracted position, and the plunger (11) or the plunger rod (6) and the needle (15) or the needle foot (16) are provided with means for coupling the plunger (11) or plunger rod (6) with the needle (15) or needle foot (16) and releasing the needle or needle