Abstract: A hollow needle is adapted to be used in a safety syringe which is automatically blocked by a rigid blocking member after finishing an injection and retraction of the used needle into a syringe cylinder, having a bifurcated slot longitudinally notched in a rear portion of a shank and needle head portion of the hollow needle and a plurality of protrusions annularly formed on a circumferential surface of the shank portion of the needle for an easier, smooth and stable embedding of the needle on the rigid blocking member in the syringe, thereby being helpful for a smooth injection and retraction operation of the needle.

Abstract: A safety syringe includes a hollow needle for injection use preliminarily held in a rigid blocking bulb generally conical shaped or truncated-cone shaped having an elongate stem portion protruding rearwardly from the bulb embedded in a rear bulb socket perpendicularly formed in a flexible plug inserted in a front portion of the syringe having a needle head portion formed on a rear portion of the needle, and a plunger slidably held in the syringe for boosting a liquid medicine in the syringe to be injected into a patient through the hollow needle having a needle-head socket recessed in the plunger to be engageable with the needle head portion to drive and move the rigid blocking bulb frontwardly into a front bulb socket which is normally inclinedly formed in the flexible plug and will be operatively biased perpendicularly in the plug when almost exhausting the liquid in the syringe when finishing the injection, whereby upon a retraction of the plunger and the needle coupled to the plunger rearwardly into the s

Abstract: A safety syringe includes a hollow needle for intravenous injection use eccentrically mounted in a syringe with said needle preliminarily held in a rigid blocking bulb generally conical shaped or truncated-cone shaped having an elongate stem portion protruding rearwardly from the bulb embedded in a rear bulb socket perpendicularly formed in a flexible plug inserted in a front porton of the syringe having a needle head portion formed on a rear portion of the needle, and a plunger slidably held in the syringe for boosting a liquid medicine in the syringe to be injected into a patient through the hollow needle having an annular groove annularly recessed in the plunger to be engageable with the needle head portion to drive and move the rigid blocking bulb frontwardly from the rear bulb socket into a front bulb socket which is normally inclinedly formed in the flexible plug and will be operatively biased perpendicularly in the plug when almost exhausting the liquid in the syringe when finishing the injection, wher

Abstract: A nest tire structure to prevent a tire from blowing out completely; the inner surface of an outer tire is mounted with a solid inner tire, of which the sectional view is in a round or oblong shape. Whenever the outer tire has a leak, the solid inner tire can separate the steel rim from becoming direct contact with the ground surface and the outer tire so as to prevent the steel rim from becoming direct contact with the ground surface and the outer tire so as to prevent the steel rim from being deformed or a car losing its balance to result in falling down, and also to let a car to run at a given short distance.

Abstract: A safety syringe includes: an annular groove annularly recessed in a front surface of a plunger slidably held in the syringe to be engageable with a needle head portion formed on a rear portion of a hollow needle eccentrically mounted in a front portion of the syringe, with the annular groove having a longitudinal section formed as a biasing socket engageable with the needle head portion for biasing the needle obliquely within the syringe when retracting the plunger and the needle into the syringe, thereby preventing an outward protruding of the retracted needle for safety and hygienic purpose.

Abstract: A safety syringe includes: a hollow needle secured in a front portion of the syringe for injection use having a needle head portion formed on a rear portion of the needle, and a plunger slidably held in the syringe for boosting a liquid medicine in the syringe to be injected into a patient through the hollow needle having a biasing socket recessed in a front portion of the plunger engageable with the needle head portion for biasing the needle obliquely within the syringe when retracting the plunger and the needle into the syringe, thereby preventing an outward protruding of the retracted needle for preventing its injury or infectious contamination to the surroundings.

Abstract: A syringe includes a hollow needle preliminarily held in a rigid blocking disk embedded in a rear disk socket perpendicularly formed in a flexible plug inserted in a front portion of the syringe for injection use having a needle head portion formed on a rear portion of the needle, and a plunger slidably held in the syringe for boosting a liquid medicine in the syringe to be injected into a patient through the hollow needle having a needle-head socket recessed in the plunger to be engageable with the needle-head socket for pushing the needle head portion of the needle frontwardly to drive the rigid blocking disk frontwardly to engage the blocking disk into a front disk socket which is normally inclinedly formed in the flexible plug and will be operatively perpendicularly biased in the plug when approximately exhausting the liquid in the syringe and finishing the injection, whereby upon a retraction of the plunger and the needle with the needle head portion received in and coupled to the plunger into the syring