Modular retaining screwdriver

Patent metadata

Field	Value
Publication number	US-11213335-B2
Application number	US-202016851090-A
Country	US
Kind code	B2
Filing date	Apr 16, 2020
Priority date	Apr 16, 2020
Publication date	Jan 4, 2022
Grant date	Jan 4, 2022

Abstract

A modular system for treating a bone includes a main body including a channel extending therethrough. A distal end includes a driving feature sized and shaped to engage a corresponding driving structure of one of first and second bone screws. The system also includes an inner shaft sized and shaped to be inserted into the channel and including a distal end including a retaining feature for engaging a corresponding retaining structure extending within a recess at a proximal end of the first screw. Furthermore, the system includes an outer shaft extending longitudinally and including a channel extending therethrough. The channel of the outer shaft is sized and shaped to slidably receive the main body therein and including a retaining feature extending along a distal end thereof. The retaining feature of the outer shaft engages a retaining structure extending along an exterior surface of the second screw.

First claim

What is claimed is:

1. A modular system for treating a bone, comprising:
a main body including an elongated member extending from a proximal end to a distal end and including a channel extending longitudinally therethrough, the proximal end attached to a handle member and the distal end including a driving feature sized and shaped to engage a corresponding driving structure of one of a first bone screw and a second bone screw;
an inner shaft including a longitudinal element sized and shaped to be inserted through the channel of the elongated member of the main body, the longitudinal element extending from a proximal end to a distal end including a retaining feature for engaging a corresponding interior retaining structure extending within a recess at a proximal end of the first bone screw; and
an outer shaft extending longitudinally from a proximal end to a distal end and including a channel extending therethrough, the channel sized and shaped to slidably receive the elongated member of the main body therein and including a retaining feature extending along the distal end thereof, the retaining feature of the outer shaft configured to engage an exterior retaining structure extending along an exterior surface of the second bone screw, wherein the main body is selectively assemblable with one of the inner and outer shaft to drive one of the first and second bone screws into a bone.

2. The system of claim 1 , wherein the retaining feature of the inner shaft includes a threading extending along the distal end thereof.

3. The system of claim 1 , wherein the inner shaft includes a knob attached to the proximal end of the longitudinal element, the knob extending proximally of the handle member of the main body when the inner shaft is assembled with the main body.

4. The system of claim 3 , wherein the knob includes a plurality of grooves along a radially outermost surface thereof to facilitate gripping of the knob.

5. The system of claim 4 , wherein each of the plurality of grooves is asymmetrical about a central axis extending through a center of the knob and a midpoint between a first end and a second end of each groove.

6. The system of claim 5 , wherein each of the plurality of grooves is configured as a substantially arcuate recess so that a first portion of the arcuate recess extending between the first end and the midpoint has a larger radius of curvature than a second portion of the arcuate recess extending between the second end and the midpoint.

7. The system of claim 1 , wherein the retaining feature of the outer shaft includes a threading extending along an interior surface of the channel at the distal end of the outer shaft.

8. The system of claim 1 , wherein the outer shaft include a locking member including a tab biased into the channel thereof and the elongated member includes a corresponding locking groove extending about a portion thereof so that, when the elongated member is inserted into the channel of the outer shaft, the tab of the locking member is pushed out of the channel until the locking groove is positioned adjacent the tab and the tab is permitted to revert to its biased configuration to be received within the locking groove.

9. The system of claim 1 , wherein the driving structure of the first and second bone screws is configured as a first recess extending into the proximal end thereof, the first recess sized and shaped to correspond to the driving feature of the main body.

10. The system of claim 9 , wherein the first and second bone screw further includes a second recess extending distally from the first recess, the retaining structure of the first and second bone screw including a threading extending along the second recess.

11. The system of claim 1 , wherein the second bone screw includes a threading extending about an entire length thereof.

Assignees

• Depuy Synthes Products Inc

Inventors

• Scherrer Simon
• Spreiter Gregor
• Défossez Henri
• Wampfler Simon

Classifications

• A61B2017/564

  Methods for bone or joint treatment · CPC title

• A61B17/8888 Primary

  at its central region · CPC title

• A61B17/8891

  at its periphery · CPC title

• A61B2017/0042

  with special provisions for gripping · CPC title

• B25B23/101

  for hand-driven screw-drivers (B25B23/105 takes precedence) · CPC title