Devices and methods for bending or cutting implants

Patent metadata

Field	Value
Publication number	US-10070909-B2
Application number	US-201514723266-A
Country	US
Kind code	B2
Filing date	May 27, 2015
Priority date	May 27, 2015
Publication date	Sep 11, 2018
Grant date	Sep 11, 2018

Abstract

Devices and methods for bending or cutting implants are disclosed herein. In some embodiments, an instrument can include a rotatable drive shaft that urges first and second portions of a modular bending or cutting template toward one another to bend or cut an implant disposed between the template portions. A linkage assembly can be included to provide a mechanical advantage in urging the template portions toward one another. In some embodiments, an instrument can include a rotatable drive shaft that, depending on direction of rotation, pushes or pulls a first modular template portion with respect to a second modular template portion to bend an implant disposed between the template portions in one direction or another direction. In some embodiments, an instrument can include a worm drive that rotates a cutting wheel with respect to a cutting plate to cut an implant inserted through openings formed in the cutting wheel and the cutting plate.

First claim

The invention claimed is:

1. An instrument for cutting an implant, comprising:
a housing having a drive shaft rotatably mounted therein, at least a portion of the drive shaft comprising a worm screw;
a cutting wheel having at least one opening formed therein through which the implant can be received and a worm gear configured to engage the worm screw of the drive shaft such that rotation of the drive shaft is effective to rotate the cutting wheel; and
a cutting plate having at least one opening formed therein through which the implant can be received;
wherein rotation of the drive shaft is effective to rotate the cutting wheel relative to the cutting plate such that a sidewall of the at least one opening of the cutting wheel and a sidewall of the at least one opening of the cutting plate exert a shear force on the implant disposed through the at least one opening of the cutting wheel and the at least one opening of the cutting plate to cut the implant.

2. The instrument of claim 1 , wherein the at least one opening formed in the cutting wheel comprises an elongated bean-shaped opening.

3. The instrument of claim 1 , wherein the at least one opening formed in the cutting wheel comprises a plurality of rings of openings, each ring of openings having a radial dimension that differs from the other rings of openings.

4. The instrument of claim 1 , wherein the at least one opening formed in the cutting plate comprises a plurality of circular openings, each circular opening having a different diameter.

5. The instrument of claim 1 , wherein the cutting plate is formed integrally with the housing.

6. The instrument of claim 1 , wherein the worm screw and the worm gear provide a mechanical advantage in rotating the cutting wheel with respect to the cutting plate.

7. The instrument of claim 1 , wherein the drive shaft is mounted in the housing by proximal and distal race bearings.

8. An instrument for cutting an implant, comprising:
a housing having a drive shaft rotatably mounted therein, at least a portion of the drive shaft comprising a worm screw;
a cutting wheel having at least one opening formed therein through which the implant can be received and a worm gear configured to engage the worm screw of the drive shaft such that rotation of the drive shaft is effective to rotate the cutting wheel; and
a cutting plate having at least one opening formed therein through which the implant can be received;
wherein rotation of the drive shaft is effective to rotate the cutting wheel relative to the cutting plate to cut the implant disposed through the at least one opening of the cutting wheel and the at least one opening of the cutting plate; and
wherein the at least one opening formed in the cutting wheel comprises an elongated bean-shaped opening.

9. An instrument for cutting an implant, comprising:
a housing having a drive shaft rotatably mounted therein, at least a portion of the drive shaft comprising a worm screw;
a cutting wheel having at least one opening formed therein through which the implant can be received and a worm gear configured to engage the worm screw of the drive shaft such that rotation of the drive shaft is effective to rotate the cutting wheel; and
a cutting plate having at least one opening formed therein through which the implant can be received;
wherein rotation of the drive shaft is effective to rotate the cutting wheel relative to the cutting plate to cut the implant disposed through the at least one opening of the cutting wheel and the at least one opening of the cutting plate; and
wherein the at least one opening formed in the cutting wheel comprises a plurality of rings of openings, each ring of openings having a radial dimension that differs from the other rings of openings.

10. An instrument for cutting an implant, comprising:
a housing having a drive shaft rotatably mounted therein, at least a portion of the drive shaft comprising a worm screw;
a cutting wheel having at least one opening formed therein through which the implant can be received and a worm gear configured to engage the worm screw of the drive shaft such that rotation of the drive shaft is effective to rotate the cutting wheel; and
a cutting plate having at least one opening formed therein through which the implant can be received;
wherein rotation of the drive shaft is effective to rotate the cutting wheel relative to the cutting plate to cut the implant disposed through the at least one opening of the cutting wheel and the at least one opening of the cutting plate; and
wherein the at least one opening formed in the cutting plate comprises a plurality of circular openings, each circular opening having a different diameter.

Assignees

• Medos Int Sarl
• Medos Int Sarl

Inventors

• Rouge Renaud
• Defossez Henri
• Chandanson Thibault
• Caulfield Joseph
• Lyness Daniel

Classifications

• B23D21/08

  with cutting wheels · CPC title

• A61B17/8863 Primary

  Apparatus for shaping or cutting osteosynthesis equipment by medical personnel · CPC title