Drive apparatus

• US 20060079919A1
• Filed: 11/08/2005
• Published: 04/13/2006
• Est. Priority Date: 09/27/2002
• Status: Active Grant

• Current Assignee: Surgitech, LLC
• Original Assignee: Surgitech, LLC
• Inventors: Harp, Richard J.
• Granted Patent: US 7,837,700 B2
• Time in Patent Office: Days
• US Class Current: 606/171
• CPC Class Codes: A61B 1/00165 with light-conductive means, e.g. fibre optics A61B1/07 takes precedence
• CPC Class Codes: A61B 1/00167 Details of optical fibre bundles, e.g. shape or fibre distribution
• CPC Class Codes: A61B 1/015 Control of fluid supply or evacuation
• CPC Class Codes: A61B 1/07 using light-conductive means, e.g. optical fibres
• CPC Class Codes: A61B 1/3135 for examination of the epidural or the spinal space
• CPC Class Codes: A61B 17/1624 Drive mechanisms therefor
• CPC Class Codes: A61B 17/1659 Surgical rasps, files, planes, or scrapers
• CPC Class Codes: A61B 17/1671 for the spine
• CPC Class Codes: A61B 2017/320028 with reciprocating movements

Abstract

The invention relates to shielded reciprocating surgical file system for precisely removing bone and/or other tissue material. The system allows a user to maneuver the system and navigate into hard to access sites under a direct vision mechanism included in the system. A transmission mechanism converts rotary motion from a motor into reciprocating motion and provides it to the surgical file for precision bone and/or tissue removal. A pulsatile pump mechanism is operatively coupled with the transmission mechanism and provides irrigating fluid to the surgical site.

Claims

1. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:

two surfaces of two respective bearings, the two surfaces being a substantially fixed distance apart; and

a cam that rotates about a central axis that is (a) substantially parallel to a direction of the linear motion of the two surfaces and (b) substantially perpendicular to the plane extending between the two surfaces;

wherein said central axis is at an angle to a plane extending between the two surfaces;

the cam having a curvilinear body of nonuniform thickness, the curvilinear body being disposed at an angle to the central axis of the cam;

wherein the curvilinear body has a shape comprising at least two toruses, the at least two toruses being partially superimposed, and each of said at least two toruses has a central axis, wherein the central axes of the at least two toruses are at an angle to each other; and

wherein the body continuously contacts the two surfaces as the cam rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they move linearly back and forth in reciprocating motion in response to the cam'"'"'s rotation about the central axis.

2. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:

two surfaces that are a substantially fixed distance apart; and

a cam that rotates about a central axis, said central axis being at an angle to a plane extending between the two surfaces;

the cam having a curvilinear body, the body having a nonuniform thickness, wherein the body continuously contacts the two surfaces as the cam rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they move linearly in response to the cam'"'"'s rotation about the central axis.

3. The apparatus of claim 2, wherein said cam'"'"'s central axis is substantially parallel to a direction of the linear motion of the two surfaces.

4. The apparatus of claim 2, wherein said central axis is substantially perpendicular to the plane extending between the two surfaces.

5. The apparatus of claim 2, wherein the two surfaces move linearly back and forth in reciprocating motion in response to the cam'"'"'s rotation about the central axis.

6. The apparatus of claim 2, wherein the curvilinear body has a shape comprising at least two toruses, the at least two toruses being partially superimposed, and each of said at least two toruses has a central axis, wherein the central axes of the at least two toruses are at an angle to each other.

7. The apparatus of claim 2, wherein at least one bearing comprises the two surfaces.

8. The apparatus of claim 7, wherein two bearings respectively comprise the two surfaces.

9. The apparatus of claim 2, wherein the curvilinear body is disposed at an angle to the central axis of the cam.

10. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:

two surfaces that are a substantially fixed distance apart;

a cam that rotates about a central axis, said central axis being at an angle to a plane extending between the two surfaces; and

the cam having means for continuously contacting the two surfaces as the cam rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they move linearly in response to the cam'"'"'s rotation about the central axis.

11. The apparatus of claim 10, wherein said cam'"'"'s central axis is substantially parallel to a direction of the linear motion of the two surfaces.

12. The apparatus of claim 10, wherein said central axis is substantially perpendicular to the plane extending between the two surfaces.

13. The apparatus of claim 10, wherein the two surfaces move linearly back and forth in reciprocating motion in response to the cam'"'"'s rotation about the central axis.

14. The apparatus of claim 10, wherein the means for continuously contacting the two surfaces has a shape comprising at least two toruses, the at least two toruses being partially superimposed, and each of said at least two toruses has a central axis, wherein the central axes of the at least two toruses are at an angle to each other.

15. The apparatus of claim 10, wherein the means for continuously contacting the two surfaces is disposed at an angle to the central axis of the cam.

16. The apparatus of claim 10, wherein at least one bearing comprises the two surfaces.

17. The apparatus of claim 16, wherein two bearings respectively comprise the two surfaces.

18. An apparatus for translating a rotary motion to a linear motion, the apparatus comprising:

two surfaces that are a substantially fixed distance apart; and

rotation means that rotates about a central axis, said central axis being at an angle to a plane extending between the two surfaces;

wherein the rotation means is configured to continuously contact the two surfaces as the rotation means rotates about the central axis, such that the two surfaces remain at the substantially fixed distance apart as they move linearly in response to the rotation means'"'"'s rotation about the central axis.

19. The apparatus of claim 18, wherein at least one bearing comprises the two surfaces.

20. The apparatus of claim 19, wherein two bearings respectively comprise the two surfaces.

21. The apparatus of claim 18, wherein said rotation means'"'"'s central axis is substantially parallel to a direction of the linear motion of the two surfaces.

22. The apparatus of claim 18, wherein said central axis is substantially perpendicular to the plane extending between the two surfaces.

23. The apparatus of claim 18, wherein the two surfaces move linearly back and forth in reciprocating motion in response to the rotation means'"'"'s rotation about the central axis.

24. The apparatus of claim 18, wherein the rotation means has a shape comprising at least two toruses, the at least two toruses being partially superimposed, and each of said at least two toruses has a central axis, wherein the central axes of the at least two toruses are at an angle to each other.