# US 10,500,342 B2 · Cold slurry syringe > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,500,342 B2 - Document ID: US10500342B2 - Status: Granted - Kind: B2 - Application number: 15/682,234 - Filed: 2017-08-21 - Published: 2019-02-21 - Granted: 2019-12-10 - Earliest claimed: 2017-08-21 - Assignees: Miraki Innovation Think Tank LLC - Applicants: Christopher J. P. Velis - Inventors: Christopher J. P. Velis - Web page: https://patentgrep.com/patent/US10500342B2 ## CPC - A61M 5/3134: {characterised by constructional features of the distal end, i.e. end closest to the tip of the needle cannula} - A61M 5/31511: {Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence)} - A61M 5/31596: {comprising means for injection of two or more media, e.g. by mixing} - A61M 2005/2026: {Semi-automatic, e.g. user activated piston is assisted by additional source of energy} - 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 A cold slurry syringe with enhanced features is provided for delivering a cold slurry into the human body. The syringe includes a syringe body for holding a volume of cold slurry, a plunger that slides within the syringe body for ejecting the cold slurry, and a tapered syringe head for delivering an even flow of cold slurry. An agitator can be added to keep the cold slurry from agglomerating and clogging the syringe. Insulation added around the syringe can keep the cold slurry from melting too quickly. A ball screw drive can be added to provide a smooth and consistent application of pressure as the cold slurry is delivered. The cold slurry flow can be enhanced by adding a streamline flow feature that reduces the occurrence of eddies or swirls inside the syringe. This feature can also help maintain the composition and consistency of the cold slurry. ## Claims ### Claim 1 A device for delivering cold slurry, the device comprising: a syringe body comprising: a first end and a second end; a longitudinal axis extending from the first and second ends; an interior lumen defined by an interior wall of the syringe body, the interior lumen configured to receive and contain a volume of cold slurry; a plunger slideably movable within the interior lumen along the longitudinal axis, the plunger comprising a stopper and a stem extending from the stopper; a syringe head extending from the first end of the syringe body along the longitudinal axis, the syringe head comprising: an inlet defining a first passageway in fluid communication with the interior lumen of the syringe body, the first passageway having a first diameter about the same as a diameter of the interior lumen; an outlet spaced a predetermined distance from the inlet along the longitudinal axis, the outlet defining a second passageway in fluid communication with outside to serve as an exit for delivering cold slurry, the second passageway having a second diameter smaller than the first diameter; and a reducer extending between the inlet and outlet, the reducer defining a third passageway in fluid communication with the first and second passageways, the third passageway having a third diameter tapering from the first diameter to the second diameter; and an agitator for stirring the cold slurry within the interior lumen, the agitator housed within the interior lumen and interposed between the plunger and the first end of the syringe body, the agitator comprising: a hub shaped as a frustum of a cone with a base facing the first end of the syringe body; and a plurality of fins radiating from the hub towards the interior wall of the syringe body. ### Claim 2 (depends on 1) The device of claim 1, wherein the third passageway includes at least one projection extending inwardly towards to the longitudinal axis to agitate the cold slurry as the cold slurry is being delivered from the device. ### Claim 3 (depends on 1) The device of claim 1, wherein the second passageway is a slip tip for receiving tubing. ### Claim 4 (depends on 1) The device of claim 1, wherein the plurality of fins are arranged in a spiral pattern around the hub. ### Claim 5 (depends on 1) The device of claim 1, wherein the plunger includes a central bore; and wherein the agitator includes a shaft extending through the central bore of the plunger, the shaft for rotating the agitator and stirring the cold slurry within the interior lumen. ### Claim 6 (depends on 5) The device of claim 5, wherein the agitator includes a motor coupled to the shaft for stirring the cold slurry within the interior lumen, mechanically. ### Claim 7 (depends on 5) The device of claim 5, wherein the agitator includes a plunger head coupled to the shaft for stirring the cold slurry within the interior lumen, manually. ### Claim 8 (depends on 1) The device of claim 1 further comprising an insulation surrounding the syringe body to maintain a temperature of the cold slurry within the interior lumen. ### Claim 9 (depends on 8) The device of claim 8, wherein the insulation is any one of fiberglass insulation, foam insulation, gel insulation, and aerogel insulation. ### Claim 10 (depends on 8) The device of claim 8, wherein the insulation is an insulating sleeve for receiving the syringe body. ### Claim 11 (depends on 1) The device of claim 1 further comprising a ball screw fixed to and extending away from the second end of the syringe body; wherein the plunger includes a through bore for rotating the plunger about the ball screw; wherein the plunger further includes a plunger head at an end opposite the stopper; wherein the stem includes a ball nut located between the plunger head and the stopper; and wherein the ball nut threadedly engages the ball screw such that turning the plunger head moves the stopper between the first end to the second end of the syringe body. ### Claim 12 (depends on 1) The device of claim 1, wherein the stem is a ball screw with a plunger head at an end opposite the stopper, and the device further comprising a ball nut fixed to the second end of the syringe body; and wherein the ball nut threadedly engages the ball screw such that turning the plunger head moves the stopper between the first end to the second end of the syringe body. ### Claim 13 (depends on 1) The device of claim 1 wherein the interior lumen is a streamline flow feature comprising a core structure and a passageway defined by the core structure; wherein a plane of the passageway intersects the longitudinal axis at an angle. ### Claim 14 (depends on 1) The device of claim 1, wherein the syringe body is made any one of polyethylene, polypropylene, and glass. ### Claim 15 (depends on 1) The device of claim 1, wherein the interior lumen receives a volume of cool fluid that changes to the volume of cold slurry. ### Claim 16 (depends on 1) The device of claim 1, wherein the reducer has a conical shape.