Abstract: A blood collection device includes a syringe assembly containing a slidable needle assembly within the cavity of a syringe body. The syringe body has a syringe top for receiving a seal assembly wherein the seal assembly is reversibly locked to the top of the syringe top. Within the insertable tube of the seal assembly is an occluding seal secured within the insertable cylinder with retaining rings. The occluding seal allows blood to flow from on end of a double pointed needle into a fully inserted collection tube. When the collection tube is removed the occluding seal keeps blood from flowing into the cavity of the insertable cylinder.

Abstract: A dental syringe system having a syringe body containing a needle assembly wherein the syringe body serves as a protective shield after medication is injected. A reusable plunger assembly pushes a slidable seal of a carpule and the needle out for medication delivery and then pulls the needle back within the syringe body after the medication is delivered. The needle assembly, syringe body, carpule carrier and carpule are disposable and the plunger is reusable.

Abstract: A blood collection device includes a syringe assembly containing a slidable needle assembly within the cavity of a syringe body. The syringe body has a syringe top for receiving a seal assembly wherein the seal assembly is reversibly locked to the top of the syringe top. Within the insertable tube of the seal assembly is an occluding seal secured within the insertable cylinder with retaining rings. The occluding seal allows blood to flow from on end of a double pointed needle into a fully inserted collection tube. When the collection tube is removed the occluding seal keeps blood from flowing into the cavity of the insertable cylinder.

Abstract: A dental syringe system having a syringe body containing a needle assembly wherein the syringe body serves as a protective shield after medication is injected. A reusable plunger assembly pushes a slidable seal of a carpule and the needle out for medication delivery and then pulls the needle back within the syringe body after the medication is delivered. The needle assembly, syringe body, carpule carrier and carpule are disposable and the plunger is reusable.

Abstract: A reusable hypodermic syringe assembly (200) comprising a syringe (218) having a barrel shaped portion (214) with an opening (280) therein, a cartridge (202) insertable into and removable from the barrel shaped portion (214) of the syringe and containing a medication (262) into a patient from the cartridge (202) with the needle (210) and the medication (262) being sealably contained within first (204) and second (260) separately sealed compartments, respectively, within the cartridge (202) before injection of the medication. A plunger (224) functions to push on the second compartment (204) and thereby extends the distal end of the needle (210) out of the cartridge (202) and the proximal end of the needle (213) into the sealed second compartment (204) containing the medication before the injection of the medication (262), without the needle (210) being touched by human hands.