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A robotic surgical instrument comprising: a shaft; an end effector comprising a first end effector element with a first surface and a second end effector element with a second surface configured to interface with the first surface; and an articulation connecting the end effector to the shaft, the articulation permitting the first end effector element to rotate about a first axis and the second end effector element to rotate about a second axis, the first and second axes being transverse to the longitudinal axis of the shaft; wherein, when the end effector is aligned with the shaft and the first and second surfaces are interfaced, the orientation of the first surface, relative to the first axis, is greater than zero degrees.

Titel:	ARRANGEMENT OF END EFFECTOR ELEMENTS
Link:	View record in USPTO Patent Applications (Volltext)
Veröffentlichung:	2023
Medientyp:	Patent
Sonstiges:	Nachgewiesen in: USPTO Patent Applications Sprachen: English Document Number: 20230355260 Publication Date: November 9, 2023 Appl. No: 18/044913 Application Filed: September 21, 2021 Assignees: CMR Surgical Limited (Cambridge, GB) Claim: 1. A robotic surgical instrument comprising: a shaft; an end effector comprising a first end effector element with a first gripping surface and a second end effector element with a second gripping surface configured to interface with the first gripping surface, the first and second gripping surfaces being the respective inner surfaces of the first and second end effector elements; and an articulation connecting the end effector to the shaft, the articulation permitting the first end effector element to rotate about a first axis and the second end effector element to rotate about a second axis, the first and second axes being transverse to the longitudinal axis of the shaft; wherein, when the end effector is aligned with the shaft and the first and second gripping surfaces are interfaced, the orientation of the average line representing the orientation of the first gripping surface, relative to the first axis, is greater than zero degrees. Claim: 2. A robotic surgical instrument as claimed in claim 1 wherein, when the end effector is aligned with the shaft and the first and second gripping surfaces are interfaced, the orientation of the average line representing the orientation of the second gripping surface, relative to the first axis, is greater than zero degrees. Claim: 3. A robotic surgical instrument as claimed in claim 1, wherein the orientation of the average line representing the orientation of the first gripping surface relative to the first axis is between 20 and 35 degrees. Claim: 4. A robotic surgical instrument as claimed in claim 1 wherein, when the end effector is aligned with the shaft, the longitudinal axis of the end effector is coincident with the longitudinal axis of the shaft. Claim: 5. A robotic surgical instrument as claimed in claim 1, wherein the first end effector element further comprises a third surface opposing the first gripping surface, and wherein the third surface is parallel to the first gripping surface. Claim: 6. A robotic surgical instrument as claimed in claim 1, wherein the second end effector element further comprises a fourth surface opposing the second gripping surface, and wherein the fourth surface is parallel to the second gripping surface. Claim: 7. A robotic surgical instrument as claimed in claim 1, wherein the first end effector element and the second end effector element are independently rotatable about the first and second axes, respectively. Claim: 8. A robotic surgical instrument as claimed in claim 1, wherein the articulation comprises a first joint permitting the first end effector element to rotate about the first axis and a second joint permitting the second end effector element to rotate about the second axis. Claim: 9. A robotic surgical instrument as claimed in claim 1, wherein the first end effector element is drivable by a first pair of driving elements and the second end effector element is drivable by a second pair of driving elements. Claim: 10. A robotic surgical instrument as claimed in claim 1, wherein the first joint comprises a first threaded axle, and the first effector element comprises a threaded channel configured to interface with the first threaded axle. Claim: 11. A robotic surgical instrument as claimed in claim 1, wherein the second joint comprises a second threaded axle, and the second end effector element comprises a threaded channel configured to interface with the second threaded axle. Claim: 12. A robotic surgical instrument as claimed in claim 10, wherein the threaded axle has a pitch diameter of between 0.3 mm and 2 mm. Claim: 13. A robotic surgical instrument as claimed in claim 8, wherein the articulation further comprises a third joint, the third joint permitting the end effector to rotate about a third axis transverse to the first and second axes. Claim: 14. A robotic surgical instrument as claimed in claim 1, wherein a distal end of the shaft is connected to the articulation and a proximal end of the shaft is connected to a drive mechanism for driving the articulation. Claim: 15. A robotic surgical instrument as claimed in claim 13, wherein the articulation further comprises a supporting body that is connected to the first end effector element by the first joint, the second end effector element by the second joint and the shaft by the third joint. Claim: 16. A robotic surgical instrument as claimed in claim 1, wherein the first gripping surface is contained within a first plane and the second gripping surface is contained within a second plane and, when the end effector is aligned with the shaft and the first and second gripping surfaces are interfaced, the orientation of the average line representing the orientation of both the first plane and the second plane, relative to the first and second axes, is greater than zero degrees. Claim: 17. A robotic surgical instrument as claimed in claim 1, wherein the first axis is the same as the second axis. Claim: 18. A robotic surgical instrument as claimed in claim 1, wherein the first and second end effector elements are opposing first and second jaws of an end effector. Claim: 19. A robotic surgical instrument as claimed in claim 1, wherein the robotic surgical instrument is configured to be connected to a surgical robot. Current International Class: 61; 25; 61

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ARRANGEMENT OF END EFFECTOR ELEMENTS