Abstract: A needle and pre-filled syringe system that provides ultra-low dosage waste and automatic needlestick protection. A syringe assembly is pre-filled with an injection material. A needle head assembly attaches to the syringe assembly. A spacer is disposed between the needle head assembly and the syringe assembly. The spacer has a central opening. The needle head assembly supports a needle with a needle base. When assembled, the needle base passed into the central opening of the spacer. The needle head assembly also contains a safety slide that can selectively cover the needle. During an injection, pressure and/or contact with the plunger head causes the spacer to contact and move the safety slide. The safety slide moves to cover the needle during the injection procedure, therein rendering the needle safe before the injection process is even complete.

Abstract: A needle and syringe system that provides ultra-low dosage waste and automatic needlestick protection. A syringe assembly is provided that contains a barrel and a plunger. A tubular spacer is disposed in the barrel. A needle head assembly is provided that includes a collar and a needle. A safety slide is positioned between the needle and the collar. The safety slide has a sheathing tube that surrounds part of the needle. The safety slide can move relative the needle. In a first position, the sheathing tube does not extend beyond the sharpened end of the needle. In a second position, the sheathing tube extends beyond the sharpened end of the needle. When advanced, the plunger head moves the tubular spacer. The tubular spacer passes over the base of the needle and presses against the safety slide. The safety slide is moved from the first position to the second position.

Abstract: A needle and pre-filled syringe system that provides ultra-low dosage waste and automatic needlestick protection. A syringe assembly is pre-filled with an injection material. A needle head assembly attaches to the syringe assembly. A spacer is disposed between the needle head assembly and the syringe assembly. The spacer has a central opening. The needle head assembly supports a needle with a needle base. When assembled, the needle base passed into the central opening of the spacer. The needle head assembly also contains a safety slide that can selectively cover the needle. During an injection, pressure and/or contact with the plunger head causes the spacer to contact and move the safety slide. The safety slide moves to cover the needle during the injection procedure, therein rendering the needle safe before the injection process is even complete.

Abstract: A needle and syringe system that provides ultra-low dosage waste and automatic needlestick protection. A syringe assembly is provided that contains a barrel and a plunger. A tubular spacer is disposed in the barrel. A needle head assembly is provided that includes a collar and a needle. A safety slide is positioned between the needle and the collar. The safety slide has a sheathing tube that surrounds part of the needle. The safety slide can move relative the needle. In a first position, the sheathing tube does not extend beyond the sharpened end of the needle. In a second position, the sheathing tube extends beyond the sharpened end of the needle. When advanced, the plunger head moves the tubular spacer. The tubular spacer passes over the base of the needle and presses against the safety slide. The safety slide is moved from the first position to the second position.

Abstract: A safety needle assembly has a rigid housing that encloses a locking mechanism cooperable with actuator that slides over the tip of the needle to prevent accidental sticks after the needle has been used. The locking mechanism operates to place into interference two members, one of which is fixed relative to the outer housing, while the other is formed on the actuator that is slidably mounted in the housing for movement in response to the syringe plunger reaching the end movement at the bottom of the syringe barrel to move from an exposed position into a covered position. In one embodiment, the actuator includes a pair of axially extending legs having cam members formed thereon to engage a bridge member spanning diametrically across the housing. A safety cap is formed with ribs around the mounting end to prevent the safety cap from rolling across a planar surface.

Abstract: A safety needle assembly has a rigid outer housing that encloses a locking mechanism cooperable with an apparatus that slides a sheath over the tip of the needle to prevent accidental sticks after the needle has been used. The safety needle assembly presents a common housing diameter that can be connected to syringe barrels formed with a suitably sized connection port irrespective of the size of the syringe barrel. The safety needle assembly is interchangeable with respect to properly configured syringe barrels. The plunger in the syringe barrel is configured to actuate the locking mechanism within the safety needle assembly when the plunger reaches the end of the stroke to the bottom of the barrel. The outer housing is formed with internal threads that engage corresponding external threads on the connection port to detachably mount the safety needle assembly on the syringe barrel.

Abstract: A safety needle assembly having a rigid housing that encloses a locking mechanism, an actuator that is operable to slide a sheath over the tip of the needle to prevent accidental sticks after the needle has been used, and an actuator that is operable in response to the final end movement of the syringe plunger to effect movement of the actuator over the needle tip. The housing is made in a standard size that is mountable on a connection port formed on a syringe barrel that can have a much greater diameter than the connection port. An adapter is provided for mounting a standard needle having a Luer lock to enable a health care professional the flexibility to use conventional needles to load medicine into the syringe barrel then replacing with a safety needle assembly for injection of the medicine.

Abstract: A safety syringe having a sheath advanceable into a covered position by operation of the plunger with a mechanism for securing the sheath in the covered position. A bar extends across the interior of the barrel. One or more arms depend from the sheath, engaging the plunger directly or indirectly. Depressing the plunger pushes the sheath, via the arms, into the covered position. The arms each include a first and a second tooth. As the sheath is advanced, the first tooth will encounter the bar. The leading edge of the first tooth is beveled to allow the tooth to pass over the bar. The trailing edge of the first tooth is not beveled, preventing the first tooth from being pulled back over the bar. The leading edge of the second tooth is likewise not beveled, also preventing the second tooth from passing over the bar. The first and second teeth lock the bar between them, preventing the sheath and arms from moving in either direction.