Surgical sagittal saw blade with a static bar, a pivoting blade head, drive rods that pivot the blade head and fingers that connect the drive rods to the blade head, the fingers being seated in the static bar

Patent metadata

Field	Value
Publication number	US-9820753-B2
Application number	US-201615267845-A
Country	US
Kind code	B2
Filing date	Sep 16, 2016
Priority date	Sep 10, 2005
Publication date	Nov 21, 2017
Grant date	Nov 21, 2017

Abstract

A surgical sagittal saw blade with a static blade bar, an oscillating blade head and at least one drive rod disposed in the blade bar that pivots the blade head. The blade bar is formed with an opening located proximal to the distal end of the blade. A finger connected to a distal end of the drive rod is located above the drive rod so as to be seated in the opening in the blade bar. The finger extends forward of the drive rod over a base section of the blade head. A pin that extends from the finger pivotally connects the blade head to the finger and, by extension, to the drive rod.

First claim

What is claimed is:

1. A surgical saw blade, said saw blade comprising:
an elongated blade bar, said blade bar having opposed proximal and distal sections, the proximal section shaped so that said blade bar can be releasably statically secured to a powered surgical saw, said blade bar having, in the distal section, a primary opening that opens into a void space within said blade bar, and a second opening that is spaced proximally away from the primary opening;
a blade head, said blade head having: a base that is pivotally mounted in the void space of said blade bar; and a crown integral with said base that extends through and out of the blade bar primary opening, said crown being formed with teeth, wherein said base and said crown both each have a thickness and the thickness of said crown is greater than the thickness of the base to allow the insertion of said blade bar into a kerf cut by said blade head;
at least one drive rod that is moveably disposed in said blade bar, said at least one drive rod having a distal end located adjacent said blade head base and a proximal end configured to engage a drive member integral with the surgical saw, said at least one drive rod having a thickness that allows said drive rod to move within the void space of said blade bar; and
at least one finger that extends above said at least one drive rod and above a surface of said blade head base, wherein said at least one finger is connected to both said at least one drive rod and said blade base to pivotally connect said blade head base to said drive rod and said finger is seated in the blade bar second opening.

2. The surgical saw blade of claim 1 , wherein:
said blade bar is formed with opposed sides and the opposed sides of said plate of said blade bar are each formed with a blade bar second opening; and
two said fingers extend between said at least one drive rod and said blade head base, wherein each said finger is located above a surface of said drive rod and an adjacent surface of said blade head base wherein: said fingers are located over opposed surfaces of said drive rod and said blade base; said fingers collectively pivotally connect said blade head base to said drive rod; and each said finger is seated in a separate one of said blade bar second openings.

3. The surgical saw blade of claim 1 wherein said at least one finger is welded to said drive rod.

4. The surgical saw blade of claim 1 , wherein said at least one finger is formed integrally with said drive rod.

5. The surgical saw blade of claim 1 , wherein the proximal end of said at least one drive rod is formed to have a thickness greater than the rest of said drive rod.

6. The surgical saw blade of claim 1 , wherein said blade bar is formed with at least one third opening into which the drive member of the surgical saw extends.

7. The surgical saw blade of claim 1 , wherein:
said blade bar is formed so as to have plural second openings; and
at least two said drive rods are moveably disposed in said blade bar and wherein
at least one said finger extends over distally forward of each said drive rod so as to extend over the base of said blade head and each said finger pivotally connects the said drive rod from which said finger extends to said base of said blade head and each said finger is disposed in a separate second opening formed in said blade bar.

8. The surgical saw blade of claim 1 , wherein:
said blade bar includes: opposed lower and upper plates that are spaced apart from each other so as define the distal section of said blade bar and the void space of said blade bar wherein, at least one said plate is shaped to define the at least one second opening of said blade bar; and, between said plates, there is a structural component that includes a curved face that is directed towards the primary opening of said blade bar; and
said blade head base is seated against the curved face of said structural component located between said plates of said blade bar.

9. The surgical saw blade of claim 8 , wherein said structural component between said plates that includes a curved face is a boss that extends between said plates.

10. The surgical saw blade of claim 1 , wherein said blade bar is formed with a third opening separate from the primary opening and the second opening, the third opening opening into the void space so that debris can flow out of the void space through the third opening.

11. A surgical saw blade, said saw blade comprising:
an elongated blade bar, said blade bar having opposed proximal and distal sections, the proximal section shaped so that said blade bar can be releasably statically secured to a powered surgical saw, said blade bar having, in the distal section, a primary opening that opens into a void space within said blade bar;
a blade head, said blade head having: a base that is pivotally mounted in the void space of said blade bar within the distal section of said blade bar; at least one opening in said base; and a crown integral with said base that extends through and out of the blade bar primary opening, said crown being formed with teeth, wherein said base and said crown both each have a thickness and the thickness of said crown is greater than the thickness of said base to allow the insertion of said blade bar into a kerf cut by said blade head;
at least one drive rod disposed between said blade bar plates, said at least one drive rod having a distal end located adjacent said blade head base and a proximal end configured to engage a drive member integral with the surgical saw, said at least one drive rod having a thickness that allows said drive rod to move between the void space of said blade bar; and
at least one finger that is integral with and extends above said at least one drive rod and distally forward of said drive rod so as to extend above a surface of said base of said blade head and a pin that extends from said finger into the opening in the base of said blade head so as to moveably hold said at least finger and said at least one drive rod to said blade head
wherein, said blade bar is formed with at least one second opening that is located proximal to the primary opening and that is positioned so that said at least one finger is disposed in the at least one second opening.

12. The surgical saw blade of claim 11 , wherein:
said blade bar is formed with opposed sides and the opposed sides of said blade bar are each formed with a blade bar second opening; and
two said fingers extend between said at least one drive rod and said blade head base, wherein: each said finger is located above a surface of said drive rod and an adjacent surface of said blade head base; said fingers are located over opposed surfaces of said drive rod and said blade base; and said pin extends between said fingers through the opening in said base of said blade head.

13. The surgical saw blade of claim 11 , wherein said at least one finger is welded to said drive rod.

14. The surgical saw blade of claim 11 , wherein said at least one finger is formed as a single piece component with said drive rod.

15. The surgical saw blade of claim 11 , wherein the proximal end of said at least one drive rod is formed to have a thickness greater than the rest of said drive rod.

16. The surgical saw blade of claim 11 , wherein said blade bar is formed with at least one third opening into which the drive member of the surgical saw extends.

17. The surgical saw blade of claim 11 , wherein the proximal end of said at least one drive rod is formed with an opening for receiving the drive member of the surgical saw.

Assignees

• Stryker Corp

Inventors

• Walen James G
• Brindley Robert
• Cosgrove Liam

Classifications

• A61B2034/2051

  Electromagnetic tracking systems · CPC title

• A61B17/142 Primary

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

• Y10T29/49826

  Assembling or joining · CPC title

• A61B2017/00526

  Methods of manufacturing · CPC title

• A61B2017/00734

  battery operated · CPC title