# US 2010/0166969 A1 · Syringe tip assembly and layered deposition systems utilizing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2010/0166969 A1 - Document ID: US20100166969A1 - Status: Published application - Kind: A1 - Application number: 12/595,870 - Filed: 2008-04-04 - Published: 2010-07-01 - Earliest claimed: 2007-04-19 - Assignees: Stratasys, Inc. - Inventors: J. Samuel Batchelder - Web page: https://patentgrep.com/patent/US20100166969A1 ## CPC - B29C 64/106: using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material - B33Y 30/00: Apparatus for additive manufacturing; Details thereof or accessories therefor - B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING ## Abstract A syringe tip assembly comprising a seal component configured to engage a syringe tip, a nozzle configured to slidably engage with the seal component, and a biasing member configured to apply a biasing pressure between the seal component and the nozzle. ## Claims ### Claim 1 A syringe tip assembly for use with an extrusion syringe of a layered deposition system, the syringe tip assembly comprising: a seal component configured to engage a syringe tip of the extrusion syringe; a nozzle configured to slidably engage with the seal component; and a biasing member configured to apply a biasing pressure between the seal component and the nozzle. ### Claim 2 (depends on 1) The syringe tip assembly of claim 1, wherein the seal component comprises a ring portion and a shaft portion, wherein the ring portion functions as a bearing surface for the biasing member, and wherein the shaft portion has an inner opening configured to provide a seal with the syringe tip. ### Claim 3 (depends on 1) The syringe tip assembly of claim 1, wherein the biasing member comprises a spring that engages with the seal component and the nozzle. ### Claim 4 (depends on 1) The syringe tip assembly of claim 1, wherein the nozzle comprises a ring portion, a shaft portion, and a tip portion, the ring portion functioning as a bearing surface for the biasing member. ### Claim 5 (depends on 4) The syringe tip assembly of claim 4, wherein the seal component comprises a ring portion and a shaft portion, and wherein the shaft portion of the seal component has a slidable seal fit with the shaft portion of the nozzle. ### Claim 6 (depends on 5) The syringe tip assembly of claim 5, wherein the ring portion of the seal member and the ring portion of the nozzle provide opposing bearing surfaces for the biasing member. ### Claim 7 (depends on 1) The syringe tip assembly of claim 1, wherein the seal component is secured to the syringe tip. ### Claim 8 A syringe deposition tool comprising: a frame having a base wall; a motor; a syringe having a syringe body, a syringe tip, and a piston, wherein the piston is operably secured to the motor; and a syringe tip assembly disposed around at least a portion of the syringe tip and engagable with the base wall of the frame, the syringe tip assembly being configured to compress when the motor applies a pressure on the piston. ### Claim 9 (depends on 8) The syringe deposition tool of claim 8, wherein the syringe tip assembly comprises: a seal component configured to engage the syringe tip; a nozzle configured to slidably engage with the seal component; and a biasing member configured to apply a biasing pressure between the seal component and the nozzle. ### Claim 10 (depends on 9) The syringe deposition tool of claim 9, wherein the seal component comprises a ring portion and a shaft portion, wherein the ring portion functions as a bearing surface for the biasing member, and wherein the shaft portion has an inner opening configured to provide a seal with the syringe tip. ### Claim 11 (depends on 9) The syringe deposition tool of claim 9, wherein the biasing member comprises a spring that engages with the seal component and the nozzle. ### Claim 12 (depends on 9) The syringe deposition tool of claim 9, wherein the nozzle comprises a ring portion, a shaft portion, and a tip portion, the ring portion functioning as a bearing surface for the biasing member. ### Claim 13 (depends on 9) The syringe deposition tool of claim 9, wherein the nozzle engages with the base wall of the frame. ### Claim 14 (depends on 9) The syringe deposition tool of claim 9, wherein the seal component is secured to the syringe tip. ### Claim 15 A method of building a three-dimensional object with a syringe deposition tool of a layered deposition system, wherein the syringe deposition tool includes an extrusion syringe and a syringe tip assembly, the method comprising: applying pressure to a piston of the extrusion syringe; compressing a biasing member of the syringe tip assembly due to the pressure applied to the piston, moving the piston through a syringe body of the extrusion syringe after at least partially compressing the biasing member, wherein moving the piston through the syringe body extrudes a material through the syringe tip assembly; and removing at least a portion of the pressure applied to the piston to at least partially decompress the biasing member. ### Claim 16 (depends on 15) The method of claim 15, wherein at least partially decompressing the biasing member comprises forming a volume within the syringe tip assembly to retain at least a portion of the material. ### Claim 17 (depends on 15) The method of claim 15, further comprising: positioning a seal component of the syringe tip assembly around at least a portion of a syringe tip of the extrusion syringe; positioning the biasing member against the seal component; and positioning a nozzle of the syringe tip assembly against the biasing member, thereby retaining the biasing member between the seal component and the nozzle. ### Claim 18 (depends on 17) The method of claim 17, wherein positioning the seal component around at least the portion of the syringe tip comprises forming a seal between the seal component and the syringe tip. ### Claim 19 (depends on 17) The method of claim 17, further comprising forming a sliding engagement between the seal component and the nozzle. ### Claim 20 (depends on 15) The method of claim 15, wherein applying pressure to the piston of the extrusion syringe comprises operating a motor operably secured to the piston.