Self-orienting drill sleeve

Patent metadata

Field	Value
Publication number	US-11903596-B2
Application number	US-202217932522-A
Country	US
Kind code	B2
Filing date	Sep 15, 2022
Priority date	Jan 15, 2021
Publication date	Feb 20, 2024
Grant date	Feb 20, 2024

Abstract

A drill sleeve, including: an outer sleeve with an internal collet at a distal end of the outer sleeve, a slot, and an inner opening; a handle connected to the outer sleeve; an inner sleeve with an inner opening configured to receive and guide a drill bit, wherein the inner sleeve is configured to slide inside the inner opening of the outer sleeve; a trigger; a connection member connected to trigger and the inner tube, wherein the connection member passes through the slot in the outer sleeve and a biasing member configured to apply a biasing force between the handle and the trigger wherein the biasing force drives the inner sleeve into the outer sleeve, wherein when a distal end of the inner sleeve engages the internal collet, the internal collet is configured to engage a screw hole in a bone plate, align the drill sleeve with a nominal axis of the screw hole, and secure the drill sleeve to the screw hole.

First claim

What is claimed is:

1. A drill sleeve, comprising:
an outer sleeve with an internal collet at a distal end of the outer sleeve, a slot, and an inner opening;
a handle connected to the outer sleeve;
an inner sleeve with an inner opening configured to receive and guide a drill bit, wherein the inner sleeve is configured to slide inside the inner opening of the outer sleeve;
a trigger;
a connection member connected to the trigger and the inner sleeve, wherein the connection member passes through the slot in the outer sleeve; and
a biasing member configured to apply a biasing force between the handle and the trigger wherein the biasing force drives the inner sleeve into the outer sleeve,
wherein when a distal end of the inner sleeve engages the internal collet, the internal collet is configured to engage a screw hole in a bone plate, align the drill sleeve with a nominal axis of the screw hole, and secure the drill sleeve to the screw hole.

2. The drill sleeve of claim 1 , wherein the internal collet includes a plurality of blades configured engage the screw hole.

3. The drill sleeve of claim 2 , wherein the internal collet further includes a stop and a locking ridge.

4. The drill sleeve of claim 3 , wherein the stop is configured to engage a seat in the screw hole and the locking ridge is configured to engage a locking edge in the screw hole.

5. The drill sleeve of claim 3 , wherein a diameter of the internal collet at the locking ridge is less than a smallest diameter of the screw hole.

6. The drill sleeve of claim 1 , wherein the biasing member is a cylindrical spring surrounding the outer sleeve and located between the handle and the trigger.

7. The drill sleeve of claim 1 , wherein the biasing member is a coil spring surrounding the outer sleeve and located between the handle and the trigger.

8. The drill sleeve of claim 1 , wherein the distal end of the inner sleeve is substantially cylindrical.

9. The drill sleeve of claim 1 , wherein the distal end of the inner sleeve is tapered.

10. The drill sleeve of claim 1 , wherein an inner opening of the internal collet is substantially cylindrical.

11. The drill sleeve of claim 1 , wherein an inner opening of the internal collet is tapered.

12. The drill sleeve of claim 1 , wherein the connection member is a pin that engages a hole in the trigger and a groove in the inner sleeve.

13. A method of drilling a hole in a bone for a bone plate using a drill sleeve, wherein,
the drill sleeve, comprises: an outer sleeve with an internal collet at a distal end of the outer sleeve, a slot, and an inner opening; a handle connected to the outer sleeve; an inner sleeve with an inner opening configured to receive and guide a drill bit, wherein the inner sleeve is configured to slide inside the inner opening of the outer sleeve; a trigger; a connection member connected to trigger and the inner sleeve, wherein the connection member passes through the slot in the outer sleeve and a biasing member configured to apply a biasing force between the handle and the trigger wherein the biasing force drives the inner sleeve into the outer sleeve, the method comprising:
pressing the trigger of the drill sleeve towards the handle;
inserting the distal end of the outer sleeve into a screw hole of the bone plate;
releasing the trigger of the drill sleeve to securely engage the screw hole;
drilling a hole in the bone through the screw hole using the drill sleeve;
pressing the trigger of the drill sleeve towards the handle; and
removing the distal end of the outer sleeve from the screw hole.

14. The method of claim 13 , wherein securely engaging the screw hole includes aligning the drill sleeve with a nominal direction of the screw hole.

Assignees

• Depuy Synthes Products Inc

Inventors

• Aebi This
• Rocci Mirko
• DANIEL Steffan
• Oberli Joel
• Menze Johanna
• Baeriswyl Andreas
• Ghammar Said

Classifications

• A61B17/1728 Primary

  for holes for bone plates or plate screws · CPC title

• A61B17/1622

  Drill handpieces (A61B17/1626, A61B17/1628 take precedence) · CPC title

• A61B17/1633

  Sleeves, i.e. non-rotating parts surrounding the bit shaft, e.g. the sleeve forming a single unit with the bit shaft (A61B17/1644 takes precedence) · CPC title

• A61B2017/00367

  Details of actuation of instruments, e.g. relations between pushing buttons, or the like, and activation of the tool, working tip, or the like · CPC title