Gripper device
View Patent ↗Gripper devices for handling syringes and automated pharmacy admixture systems (APASs) that utilize such gripper devices. The gripper devices may include various gripper finger profiles, substantially tapered or angled gripping surfaces and/or gripper fingers interleaving to reduce radial distortion of the syringes to be grasped while opposing axial motion of the syringes.
1. An automated pharmacy admixture system, comprising:
a supply of a plurality of different types of medical containers, said plurality of different types of medical containers comprising items selected from the group consisting of syringes, IV bags, and vials;
a compounding system disposed in a substantially aseptic chamber to transfer medicaments between medical containers;
a robotic manipulator system to transport medical containers within the substantially aseptic chamber; and
a gripper device for handling a syringe having a barrel within the substantially aseptic chamber, the gripper device comprising:
a pair of gripper fingers, each gripper finger comprising a first jaw, the first jaw comprising a recess to grasp the syringe barrel, the recess comprising a first tapered contact surface having a leading edge to contact the syringe barrel, wherein the first tapered contact surface is disposed at an angle with respect to a longitudinal axis of the syringe barrel when the gripper fingers are in contact with the syringe barrel; and
an actuator to engage the gripper fingers to grasp the syringe barrel based on inputted or stored motion profile parameters, wherein the gripper fingers provide a ratio of slip force to grip force at least about three times greater than gripper fingers with an untapered contact surface.
2. The system of claim 1 , wherein the gripper device is coupled to the robotic manipulator system.
3. The system of claim 1 , wherein the gripper device is coupled to a syringe manipulator station.
4. The system of claim 1 , wherein the gripper device is configured to handle different sizes or shapes of syringes.
5. The system of claim 1 , wherein the tapered contact surface is curved.
6. The system of claim 1 , wherein the contact surface is tapered at an angle between about 10 degrees to about 80 degrees.
7. The system of claim 1 , wherein the contact surface is tapered at an angle between about 30 degrees to about 60 degrees.
8. The system of claim 1 , wherein the recess comprises a second tapered contact surface having a leading edge to contact the syringe barrel, wherein the second tapered contact surface is disposed at an angle with respect to the longitudinal axis of the syringe barrel when the gripper fingers are in contact with the syringe barrel.
9. The system of claim 8 , wherein the first and second tapered contact surfaces converge approximate at their leading edges.
10. The system of claim 8 , wherein the first and second tapered contact surfaces converge distal to their leading edges.
11. The system of claim 1 , wherein the recess comprises a plurality of tapered contact surfaces that form a saw tooth pattern.
12. The system of claim 1 , wherein the gripper fingers provide a ratio of slip force to grip force at least about six times greater than gripper fingers with an untapered contact surface.
13. The system of claim 1 , wherein the gripper fingers provide a reduction in syringe deformation per unit grip force by at least about 75 percent relative to gripper fingers with an untapered contact surface.
14. The system of claim 1 , wherein the gripper fingers provide a reduction in syringe deformation per unit grip force by at least about 90 percent relative to gripper fingers with an untapered contact surface.
15. The system of claim 1 , where the gripper fingers are releasably coupled to the gripper device.
16. The system of claim 1 , wherein each gripper finger comprises a second jaw that has an opposed tapering angle relative to the first jaw.
17. The system of claim 1 , wherein the jaws are interleaved with one another when the jaws are in operative positions.
18. The system of claim 1 , wherein the gripper device further comprises a feedback sensor to measure gripping force.
19. The system of claim 1 , wherein the gripper device further comprises a sensor to detect gripper finger position.
20. The system of claim 1 , wherein a pressure in the substantially aseptic chamber is regulated to a pressure level that is substantially above ambient pressure.
21. The system of claim 1 , further comprising:
a supply of gripper fingers with different configurations for processing different medical containers with different types of medicaments.
22. The system of claim 1 , further comprising:
an air handling system to provide substantially laminar air flow within the substantially aseptic chamber.
23. The system of claim 1 , further comprising:
a UV sanitization system to sanitize medical containers.
24. An automated pharmacy admixture system, comprising:
inventory means for supplying a plurality of different types of medical containers, said plurality of different types of medical containers comprising items selected from the group consisting of syringes, IV bags, and vials; compounding means disposed in a substantially aseptic chamber for transferring medicaments between medical containers;
manipulating means for transporting medical containers within the substantially aseptic chamber; and
gripping means for handling a syringe having a barrel within the substantially aseptic chamber, said gripping means comprising:
a pair of grasping means for grasping the syringe barrel, each grasp means comprising a tapered contact surface having a leading edge to contact the syringe barrel, wherein the tapered contact surface is disposed at an angle with respect to a longitudinal axis of the syringe barrel when the pair of grasping means are in contact with the syringe barrel; and
actuating means for engaging the pair of grasping means to grasp the syringe barrel based on inputted or stored motion profile parameters, wherein the pair of grasping means provide a ratio of slip force to grip force at least about three times greater than a pair of grasping means with an untapered contact surface.
25. A gripper device for handling a syringe having a barrel, comprising:
a pair of gripper fingers, each gripper finger comprising a first jaw, the first jaw comprising a recess to grasp the syringe barrel, the recess comprising a first tapered contact surface having a leading edge to contact the syringe barrel, wherein the first tapered contact surface is disposed at an angle with respect to a longitudinal axis of the syringe barrel when the gripper fingers are in contact with the syringe barrel; and
an actuator to engage the gripper fingers to grasp the syringe barrel based on inputted or stored motion profile parameters, wherein the gripper fingers provide a ratio of slip force to grip force at least about three times greater than gripper fingers with an untapered contact surface.
26. The system of claim 1 , wherein a pressure in the substantially aseptic chamber is regulated to a pressure level that is substantially below ambient pressure.