# US 8,771,236 B2 · Systems and methods for a medical syringe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,771,236 B2 - Document ID: US8771236B2 - Status: Granted - Kind: B2 - Application number: 13/717,560 - Filed: 2012-12-17 - Published: 2013-04-25 - Granted: 2014-07-08 - Earliest claimed: 2010-06-03 - Assignees: JMS North America Corporation - Applicants: JMS North America Corporation - Inventors: Shinya Nagase; Shenna Tang; Penghai Zhao - Web page: https://patentgrep.com/patent/US8771236B2 ## CPC - A61M 5/3286: {Needle tip design, e.g. for improved penetration} - A61M 5/321: {Means for protection against accidental injuries by used needles} - A61M 5/3213: {Caps placed axially onto the needle, e.g. equipped with finger protection guards (axially-extensible protective sleeves A61M5/3243)} - A61M 5/158: Needles {for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body} - A61M 5/1782: {Devices aiding filling of syringes in situ (combination of a vial and a syringe for transferring or mixing their contents A61J1/2096, filling of medical containers in general B65B3/003)} - A61M 5/3134: {characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula} - A61M 5/3293: {characterised by features of the needle hub} - A61M 5/343: {Connection of needle cannula to needle hub, or directly to syringe nozzle without a needle hub (A61M5/322 takes precedence)} - A61M 5/347: {rotatable, e.g. bayonet or screw (A61M5/344 takes precedence)} - A61M 5/348: {snap lock, i.e. upon axial displacement of needle assembly (A61M5/344 takes precedence)} - A61M 2005/3103: {Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle} - A61M 2005/31516: {reducing dead-space in the syringe barrel after delivery} - A61M 2005/3201: {Coaxially assembled needle cannulas placed on top of another, e.g. needles having different diameters} - A61M 2205/195: by the needle tip shape - A61M 2205/586: Ergonomic details therefor, e.g. specific ergonomics for left or right-handed users - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} ## Abstract Systems and methods for administering drugs to a patient, including a syringe system. The syringe system includes a plastic needle coupled to an end of a syringe barrel, the needle including a proximal taper and a distal taper. A cannula assembly is removably coupled to the plastic needle, the cannula including mating surfaces for the proximal and distal tapers of the plastic needle. The syringe system can also include a cannula cover with a first and second end with different sizes to respectively attach to the cannula assembly and the barrel when the cannula assembly is removed. The cannula may have a distal tip cut at an angle to ensure maximum removal of drug from a given vial. ## Claims ### Claim 1 A syringe system, including a barrel, plunger and piston, comprising: a plastic needle coupled to the barrel; a cannula assembly removably coupled to the plastic needle; and a cannula cover having a first end, including a first internal surface mating with an exterior surface of the cannula assembly for removable attachment thereto, and a second end opposite the first end, including a second internal surface mating with an exterior surface of the needle for removable attachment thereto. ### Claim 2 (depends on 1) The syringe system according to claim 1, wherein the first end of the cannula cover friction fits onto a hub of the cannula assembly. ### Claim 3 (depends on 1) The syringe system according to claim 1, wherein the second end of the cannula cover screws into an end of the barrel. ### Claim 4 (depends on 1) The syringe system according to claim 1, wherein the cannula assembly includes a non-coring distal tip that is angled to match a portion of an interior surface of a drug vial. ### Claim 5 (depends on 1) The syringe system according to claim 1, wherein the plastic needle is in fluid communication with the barrel, and the cannula assembly is in fluid communication with the barrel. ### Claim 6 (depends on 5) The syringe system according to claim 5, wherein the cannula assembly is in fluid communication with the barrel through a fluid path through the plastic needle. ### Claim 7 (depends on 1) The syringe system according to claim 1, wherein the cannula assembly extends a fluid path from the plastic needle. ### Claim 8 (depends on 1) The syringe system according to claim 1, wherein the cannula assembly surrounds a pointed end of the plastic needle. ### Claim 9 A syringe system, including a barrel, plunger and piston, comprising: a plastic needle coupled to the barrel; a cannula assembly removably coupled to the plastic needle; and a cannula cover having a first end, including an internal surface mating with an exterior surface of the cannula assembly for removable attachment thereto, and a second end opposite the first end, including an external surface mating with an interior surface of the barrel for removable attachment thereto and a second internal surface surrounding the needle when the second end is attached to the barrel. ### Claim 10 (depends on 9) The syringe system according to claim 9, wherein the first end of the cannula cover friction fits onto a hub of the cannula assembly. ### Claim 11 (depends on 9) The syringe system according to claim 9, wherein the second end of the cannula cover screws into an end of the barrel. ### Claim 12 (depends on 9) The syringe system according to claim 9, wherein the cannula assembly includes a non-coring distal tip that is angled to match a portion of an interior surface of a drug vial.