Saw blade stability and collet system mechanism

Patent metadata

Field	Value
Publication number	US-9566074-B2
Application number	US-201414512857-A
Country	US
Kind code	B2
Filing date	Oct 13, 2014
Priority date	Feb 6, 2012
Publication date	Feb 14, 2017
Grant date	Feb 14, 2017

Abstract

A surgical system for cutting tissue of a patient includes an outer housing and a reciprocating assembly structurally configured to carry a cutting tool in a reciprocating motion. An actuator knob is manually accessible to the user and may be fixed axially to the outer housing. The reciprocating assembly may reciprocate relative to the actuator knob. The actuator knob may be configured for rotational movement between a lock position and an unlock position. The system may also include a locking mechanism configured to retain a cutting tool within the reciprocating assembly. The locking mechanism may be responsive to movement of the actuator knob to maintain the tool within the output shaft when the actuator knob is in the lock position and permit removal of the tool when the actuator knob is in the unlock position. Surgical cutting tools, such as blades include thickness enhancing features.

First claim

What is claimed is:

1. A surgical cutting blade for cutting bone material when the blade is coupled to a hand-held surgical saw, the cutting blade comprising:
a distal cutting portion comprising a plurality of cutting teeth;
a proximal non-cutting portion disposed opposite the distal portion, the proximal portion defining a shank having opposed lateral edges and being shaped to attach to the surgical saw and being formed of a material having an upper surface and an opposing lower surface, the material having a first thickness; and
intermittent thickness enhancing features along only the opposed lateral edges of the shank, the thickness enhancing features having a high point offset from the upper surface and a low point offset from the lower surface of the material, the distance between the high point and low point forming a second thickness greater than the first thickness.

2. The cutting blade of claim 1 , wherein the intermittent thickness enhancing features comprises deformed portions formed by bends in the material only on the lateral edges of the shank.

3. The cutting blade of claim 1 , wherein the intermittent thickness enhancing features are at least one of embossments, extending fingers, laminated portions, and molded material.

4. The cutting blade of claim 2 , wherein the deformed portions are one of sinusoidal waves and bumps.

5. The cutting blade of claim 1 , wherein the proximal portion comprises through holes formed therein, the intermittent thickness enhancing features comprising a molded material extending through the through holes and forming a thickness enhancing feature on the upper surface and forming a thickness enhancing feature on the lower surface.

6. The cutting blade of claim 1 , wherein the proximal portion of the cutting blade defines a slot extending from the proximal portion toward the distal portion, wherein the slot is shaped as a key hole with a wider distal portion and a narrower proximal portion.

7. The cutting blade of claim 6 , wherein the intermittent thickness enhancing features are proximal a distal end of the slot.

8. The cutting blade of claim 7 , wherein the intermittent thickness enhancing features are distal of the distal end of the slot.

9. A surgical cutting blade for cutting bone material when the blade is coupled to a hand-held surgical saw, the cutting blade comprising:
a first surface comprising a first substantially planar surface portion and a first deformed surface portion, the first deformed surface portion at a non-cutting proximal shank portion of the cutting blade and only on a lateral edge of the shank;
a second surface comprising a second substantially planar surface portion parallel to the first substantially planar surface portion and a second deformed surface portion, the second deformed surface portion at the non-cutting proximal shank portion of the cutting blade and only on a lateral edge of the shank, the distance between the first substantially planar surface portion and the second substantially planar surface portion defining a first thickness;
the first deformed surface portion having a first peak surface point offset from the first substantially planar surface, the distance between the first peak surface point and the second surface defining a second thickness greater than the first thickness; and
a plurality of cutting teeth at a distal edge of the first and second planar surfaces.

10. The surgical cutting blade of claim 9 , wherein the second deformed surface portion has a second peak surface point offset from the second substantially planar surface, the distance between the first peak surface point and the second peak surface point defining a third thickness greater than the first thickness.

11. The cutting blade of claim 9 , wherein the first and second deformed surface portions comprise deformed portions formed by bends in the material.

12. The cutting blade of claim 9 , wherein the first and second deformed surface portions are at least one of embossments and extending fingers.

13. The cutting blade of claim 9 , comprising a distal cutting portion including the plurality of cutting teeth, a proximal non-cutting portion, and the non-cutting proximal shank between the distal cutting and proximal non-cutting portion.

14. The cutting blade of claim 9 , wherein the cutting blade defines a proximal slot and the first and second deformed surface portions are adjacent the proximal slot.

15. A set of surgical cutting blades for cutting bone material when a blade is coupled to a handheld surgical saw, the set comprising:
a first blade extending from a first proximal non-cutting portion to a first distal cutting portion and having a first proximal thickness between a first upper surface and a first lower surface; and
a second blade extending from a second proximal non-cutting portion to a second distal cutting portion and having a second proximal thickness between a second upper surface and a second lower surface;
wherein the first blade includes a first thickness enhancing feature that extends from at least one of the first upper surface or the first lower surface that defines a third proximal thickness and the second blade includes a second thickness enhancing feature that extends from at least one of the second upper surface or the second lower surface that defines a fourth proximal thickness;
wherein the first thickness is different than the second thickness;
wherein the third thickness is greater than the first thickness, the fourth thickness is greater than the second thickness, and the third thickness is the same as the fourth thickness.

16. The set of claim 15 , wherein the first and second thickness enhancing features are formed only along lateral portions of the first and second proximal non-cutting portions, respectively.

17. The set of claim 15 , wherein the first and second thickness enhancing features comprise deformed portions formed by bends in the first and second proximal portions, respectively.

18. The set of claim 17 , wherein the first and second thickness enhancing features are at least one of embossments, extending fingers, laminated portions, and molded material.

19. The set of claim 15 , wherein the first thickness enhancing feature includes a first high point offset from the first upper surface and a first low point offset from the first lower surface, a distance between the first high point and the first low point forming the third proximal thickness and the second thickness enhancing feature includes a second high point offset from the second upper surface and a second low point offset from the second lower surface, a distance between the second high point and the second low point forming the fourth proximal thickness.

Assignees

• Medtronic Ps Medical Inc

Inventors

• Milburn Thaddeus Scott
• Hauser Bret
• Sherry Mitchell
• Dexter S Shane

Classifications

• A61B17/14

  Surgical saws ({A61B17/1637 takes precedence;} dental saws for teeth A61C3/12) · CPC title

• A61B17/148

  Human Necessities · mapped topic

• A61B17/141 Primary

  Human Necessities · mapped topic

• A61B17/144 Primary

  with cutting edges at the side of the saw blades · CPC title

• A61B17/142

  with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades · CPC title