An apparatus for filling a syringe by transferring a viscous material from a container into the syringe includes a container having an interior that holds the viscous material and a plunger that expels the viscous material from the container. A syringe is connected to the container for receiving the
An apparatus for filling a syringe by transferring a viscous material from a container into the syringe includes a container having an interior that holds the viscous material and a plunger that expels the viscous material from the container. A syringe is connected to the container for receiving the viscous material at an entrance opening. The syringe includes a plug that separates the syringe into first and second sub-chambers and a rod contacting the plug and applying a force in the direction of the entrance opening. An assisting device assists in moving the rod away from the entrance opening as the first subchamber fills with the viscous material.
대표청구항▼
1. An apparatus for filling a syringe by transferring a viscous material from a container into the syringe, wherein the container comprises:a container housing;a container inner chamber defined within the container housing for holding the viscous material; anda first opening and a second opening def
1. An apparatus for filling a syringe by transferring a viscous material from a container into the syringe, wherein the container comprises:a container housing;a container inner chamber defined within the container housing for holding the viscous material; anda first opening and a second opening defined within the container housing in fluid communication with the container inner chamber, andwherein the syringe comprises:a syringe housing;a syringe inner chamber defined within the syringe housing for receiving the viscous material; anda third opening and a fourth opening defined in the syringe housing in fluid communication with the syringe inner chamber,the apparatus further comprising:a container set holder for holding a container set in a position, the container set comprising a plunger extending into the container through the first opening, and a quantity of the viscous material in the container;a syringe set holder for holding a syringe set with the third opening of the syringe removably coupled with the second opening of the container in a substantially air-tight manner, the syringe set including a plug slidably mounted in the syringe inner chamber, the plug separating the syringe inner chamber into a first sub-chamber closer to the third opening and a second sub-chamber closer to the fourth opening, the plug being configured to permit gas flow in a direction from the first sub-chamber to the second sub-chamber, and being configured to restrict a flow of viscous material in the direction from the first sub-chamber to the second sub-chamber, and being configured to prevent a flow of gas and viscous-material in a direction from the second sub-chamber to the first sub-chamber;a rod disposed in the syringe in contact with the plug and configured to apply a force to the plug in a direction toward the third opening to reduce a volume of the first sub-chamber;a linear actuator configured to push the plunger within the container towards the second opening to extrude the viscous material from the container through the second opening in order to transfer the viscous material from the container into the first sub-chamber of the syringe for filling the first sub-chamber; andan assisting device configured to assist axial movement of the rod away from the third opening as an amount of viscous material filling the first sub-chamber increases, by applying a force to the rod. 2. The apparatus according to claim 1, wherein the assisting device comprises: a movable frame engaging the rod, such that, as the movable frame moves vertically, the rod moves together with the movable frame; anda gas spring configured to apply a force to the movable frame such that upward movement of the movable frame is mechanically assisted by the gas spring. 3. The apparatus according to claim 2, wherein the gas spring includes: a cylinder; anda gas spring rod extendable and retractable relative to the cylinder such that, in a compressed state, the gas spring rod assists the upward movement of the movable frame. 4. The apparatus according to claim 1, wherein the assisting device is configured to apply a lifting force to the rod. 5. The apparatus according to claim 1, wherein the syringe has an inner circumferential surface that has a circular cross-section and defines the syringe inner chamber, the first plug comprises an elastically deformable material molded into a cup shape such that the first plug has a silhouette of a circle having an outer diameter that is substantially equal to an inner diameter of the inner circumferential surface, the first plug also having an anterior end portion and a posterior end portion, andthe first plug is mounted in the syringe with the anterior end portion located within the inner circumferential surface and facing the third opening, and with the posterior end portion in contact with the inner circumferential surface. 6. The apparatus according to claim 1, wherein the rod comprises a vacuum tube connectable to a vacuum source. 7. An apparatus for filling a syringe by transferring a viscous material from a container into the syringe, wherein the container comprises:a container housing;a container inner chamber defined within the container housing for holding the viscous material; anda first opening and a second opening defined within the container housing in fluid communication with the container inner chamber, andwherein the syringe comprises:a syringe housing;a syringe inner chamber defined within the syringe housing for receiving the viscous material; anda third opening and a fourth opening defined in the syringe housing in fluid communication with the syringe inner chamber,the apparatus further comprising:a container set holder for holding a container set in a position, the container set comprising a plunger extending into the container through the first opening, and a quantity of the viscous material in the container;a syringe set holder for holding a syringe set with the third opening of the syringe removably coupled with the second opening of the container in a substantially air-tight manner, the syringe set including a plug slidably mounted in the syringe inner chamber, the plug separating the syringe inner chamber into a first sub-chamber closer to the third opening and a second sub-chamber closer to the fourth opening, the plug being configured to permit gas flow in a direction from the first sub-chamber to the second sub-chamber, and being configured to restrict a flow of viscous material in the direction from the first sub-chamber to the second sub-chamber, and being configured to prevent a flow of gas and viscous-material in a direction from the second sub-chamber to the first sub-chamber;a rod configured to apply a force to the plug in a direction toward the third opening to reduce a volume of the first sub-chamber;pushing means for pushing the plunger within the container towards the second opening to extrude the viscous material from the container through the second opening in order to transfer the viscous material from the container into the first sub-chamber of the syringe for filling the first sub-chamber; andassisting means for assisting axial movement of the rod away from the third opening as an amount of viscous material filling the first sub-chamber increases, by applying a force to the rod. 8. The apparatus according to claim 7, wherein the rod comprises a vacuum tube connectable to a vacuum source. 9. The apparatus according to claim 7, wherein the assisting means comprises a gas spring. 10. The apparatus according to claim 9, wherein the gas spring is configured to upwardly bias the rod. 11. The apparatus according to claim 9, wherein the gas spring is configured to apply an upward force to the rod that is less than a downward weight force applied via the rod onto the plug. 12. An apparatus comprising: a container configured to hold a viscous material;a plunger movably disposed within the container;a syringe configured to hold the viscous material received from the container, the syringe being detachably connected to the container in an at least substantially air-tight manner;a plug movably disposed in the syringe and separating an interior of the syringe into a first sub-chamber and a second sub-chamber, the plug being configured to permit gas flow in a direction from the first sub-chamber towards the second sub-chamber while impeding a flow of viscous material in the direction from the first sub-chamber towards the second sub-chamber, and being configured to prevent a flow of gas and viscous-material in a direction from the second sub-chamber towards the first sub-chamber;a rod configured to apply a downward force onto the plug;a linear actuator configured to upwardly push the plunger to extrude the viscous material within the container into the first sub-chamber of the syringe; anda spring configured to apply a lifting force to the rod and thereby assist upward movement of the rod as the first sub-chamber fills with the viscous fluid. 13. The apparatus according to claim 12, wherein the spring is a gas spring. 14. The apparatus according to claim 12, wherein the lifting force of the spring is less than a downward weight force applied via the rod onto the plug. 15. The apparatus according to claim 12, further comprising: a movable frame connected to the rod; andan air cylinder connected to the movable frame, the air cylinder being configured to raise and lower the movable frame and the rod. 16. The apparatus according to claim 15, wherein the air cylinder is selectively switchable into a floating mode while the linear actuator is upwardly pushing the plunger. 17. The apparatus according to claim 12, wherein the plug is comprised of an elastically deformable material and has a cup shape.
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이 특허에 인용된 특허 (3)
Boiardi Mario (Queenstown MD), Dispenser for flowable materials.
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