IP Library › Granted Patent US 12,433,700
Granted Patent B2
US 12,433,700 · App. 18/140,818 · Granted Oct 7, 2025

Robotic surgical assemblies

Inventor: Brian Rockrohr (Guilford, CT)
Assignee: Covidien LP
A61B34/30A61B34/71A61B2034/302A61B2034/305
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Quick Facts
Patent No.
US 12,433,700
App. No.
18/140,818
Filed
Apr 28, 2023
Granted
Oct 7, 2025
Kind
B2
Art Unit
3771
USPC
606/130
Abstract

A surgical instrument for use with and for selective connection to an instrument drive unit includes an end effector, an instrument drive connector including a plurality of drive assemblies, and a plurality of drive members in mechanical cooperation with the instrument drive connector and the end effector. Each drive assembly of the plurality of drive assemblies includes a drive screw including an elongated threaded body and a drive nut threadedly engaged with the elongated threaded body of the drive screw such that rotation of the drive screw results in longitudinal movement of the drive nut. Each drive member of the plurality of drive members includes a proximal end portion secured to a respective drive nut of one of the plurality of drive assemblies such that longitudinal translation of the respective drive nut causes longitudinal translation of the drive member to drive a function of the end effector.

Claims (41)

1. A surgical instrument for use with a robotic surgical system, the surgical instrument comprising:

an instrument drive connector including a housing assembly defining a bore therein;

an elongated shaft having a proximal portion operably coupled to the instrument drive connector and a distal portion having an end effector; and

a drive assembly housed within the bore of the housing assembly, the drive assembly including:

a drive screw rotatable relative to the housing assembly;

a drive nut mechanically engaged with the drive screw such that rotation of the drive screw causes longitudinal movement of the drive nut;

a biasing element surrounding a portion of the drive screw; and

a drive member in mechanical cooperation with the drive nut and the end effector.

2. The surgical instrument according to claim 1 , wherein the drive screw includes a proximal end having an input drive coupler configured to receive rotational forces.

3. The surgical instrument according to claim 1 , wherein the drive nut includes a first rail extending longitudinally along an outer surface thereof, the first rail slidingly disposed within a longitudinally extending channel formed within the housing assembly.

4. The surgical instrument according to claim 1 , wherein the instrument drive connector includes a drive connector frame disposed within the housing assembly and in mechanical cooperation with the drive assembly.

5. The surgical instrument according to claim 4 , wherein the drive connector frame includes a proximal end including a proximal bearing dimensioned to retain a proximal end of the drive screw.

6. The surgical instrument according to claim 4 , wherein the drive assembly is one of a plurality of drive assemblies disposed radially around the drive connector frame.

7. The surgical instrument according to claim 1 , wherein the drive screw extends through an aperture defined through the drive nut.

8. The surgical instrument according to claim 1 , wherein the biasing element includes a proximal portion engaged with a distal end of the drive nut and a distal portion disposed within a retention pocket formed in the bore of the housing assembly.

9. The surgical instrument according to claim 8 , wherein the biasing element is pre-tensioned to push the drive nut in a proximal direction thereby applying tension to the drive member and preventing the drive member from going slack.

10. The surgical instrument according to claim 1 , wherein the end effector includes a jaw assembly and movement of the drive member effectuates a function of the jaw assembly.

11. A surgical instrument for use with a robotic surgical system, the surgical instrument comprising:

an instrument drive connector including a housing assembly defining a bore therein;

an elongated shaft having a proximal portion operably coupled to the instrument drive connector and a distal portion having an end effector; and

a drive assembly housed within the bore of the housing assembly, the drive assembly including:

a drive screw rotatable relative to the housing assembly;

a drive nut mechanically engaged with the drive screw such that rotation of the drive screw causes longitudinal movement of the drive nut; and

a drive member including a rigid proximal end portion secured to the drive nut and a flexible distal end portion in mechanical cooperation with the end effector.

12. The surgical instrument according to claim 11 , wherein the proximal end portion of the drive member is a rod, and the distal end portion of the drive member is a cable.

13. The surgical instrument according to claim 11 , wherein the drive screw includes a proximal end having an input drive coupler configured to receive rotational forces.

14. The surgical instrument according to claim 11 , wherein the drive screw extends through an aperture defined through the drive nut.

15. The surgical instrument according to claim 11 , wherein the drive assembly further includes a biasing element surrounding a portion of the drive screw.

16. A robotic surgical system comprising:

a surgical instrument including:

an instrument drive connector including a housing assembly defining a bore therein;

an elongated shaft having a proximal portion operably coupled to the instrument drive connector and a distal portion having an end effector; and

a drive assembly housed within the bore of the housing assembly, the drive assembly including:

a drive screw rotatable relative to the housing assembly;

a drive nut mechanically engaged with the drive screw such that rotation of the drive screw causes longitudinal movement of the drive nut;

a biasing element surrounding a portion of the drive screw; and

a drive member in mechanical cooperation with the drive nut and the end effector.

17. The robotic surgical system according to claim 16 , further comprising an instrument drive unit coupled to the instrument drive connector of the surgical instrument.

18. The robotic surgical system according to claim 17 , wherein the instrument drive unit includes a motor configured to transfer power and actuation forces to the instrument drive connector.

19. The robotic surgical system according to claim 18 , wherein the motor includes an output drive coupler, and the drive screw includes an input drive coupler engaged with the output drive coupler such that rotation of the output drive coupler causes a corresponding rotation of the input drive coupler.

20. The robotic surgical system according to claim 17 , further comprising a robotic arm, the instrument drive unit operably coupled to the robotic arm.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 28, 2023
From: ROCKROHR, BRIAN
To: COVIDIEN LP
Reel/Frame 063477/0593 →
Continuity (4)
Continuation 17013936 · Sep 8, 2020
Continuation 15735058
Provisional Application 62183363 · Jun 23, 2015
Related Publication 20230320796A1 · Oct 12, 2023
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