Method of assembling the oscillating assembly of a surgical sagittal saw

Patent metadata

Field	Value
Publication number	US-9445822-B2
Application number	US-201514744420-A
Country	US
Kind code	B2
Filing date	Jun 19, 2015
Priority date	Sep 10, 2005
Publication date	Sep 20, 2016
Grant date	Sep 20, 2016

Abstract

A method of assembling a surgical sagittal saw that includes an oscillating head. The oscillating head and the yoke used to drive the head are formed with complementary tapered surfaces. The oscillating head is seated in the yoke so the tapered surfaces are adjacent. The yoke and head are pressed together so the yoke and head tapered surfaces abut. As a result of tapered surfaces abutting the oscillating head and yoke effectively become a single unit. The oscillating head and yoke are mounted to the saw body so the yoke can be driven by the drive shaft integral with the saw. The oscillating head is rotatably mounted to the saw. Thus, upon actuation of the drive shaft, the drive shaft oscillates the yoke so as to foster similar oscillations in the oscillating head. The oscillating head drives the saw blade attached to the saw.

First claim

What is claimed is:

1. A method of assembling a surgical sagittal saw, said method including the steps of:
providing an oscillating head, the oscillating head having: a top located feature for removably holding a surgical sagittal saw blade to the head; a longitudinal axis that extends top-to-bottom through the head; and an elongated trunk that extends along the longitudinal axis, the elongated trunk being formed with at least one tapered surface such that, extending along the tapered surface from a bottom of the tapered surface to a top of the tapered surface, the distance between the longitudinal axis of the head and the tapered surface changes;
providing a yoke, the yoke having: features for engaging a drive shaft capable of oscillating the yoke; and a bore, the bore shaped to receive the trunk of the oscillating head, the bore being defined by at least one yoke tapered surface that is complementary to the tapered surface of the trunk of said oscillating head;
mounting the oscillating head to the yoke so the trunk of the oscillating head is seated in the bore of the yoke such that the tapered surface of the trunk of the oscillating head abuts the tapered surface of the yoke;
pressing the oscillating head and the yoke together so the tapered surface of the trunk of the oscillating head presses against the tapered surface of the yoke so the oscillating head and the yoke become a single unit; and
mounting the oscillating head and attached yoke to a saw body that includes a drive shaft so that the yoke engages the drive shaft and the oscillating head is able to oscillate so that the actuation of the yoke by the drive shaft results in the back and forth oscillations of the oscillating head around the longitudinal axis of the oscillating head.

2. The method of assembling a surgical sagittal saw of claim 1 , wherein, in said step of providing an oscillating head, an oscillating head is provided that includes a planar top surface.

3. The method of assembling a surgical sagittal saw, claim 1 , wherein, in said step of providing an oscillating head, an oscillating head is provided that includes: a planar top surface; and at least one drive pin that extends upwardly from the top surface, the drive pin shaped to receive a drive component of the surgical sagittal saw blade attached to the surgical sagittal saw.

4. The method of assembling a surgical sagittal saw of claim 1 , wherein, in said step of mounting the oscillating head and yoke to the saw body, at least one bearing is positioned between the oscillating head and the saw body to rotatably hold the oscillating head to the saw body.

5. The method of assembling a surgical sagittal saw of claim 1 , wherein: in said step of mounting the oscillating head and yoke to the saw body, a first bearing is positioned between the top of oscillating head and the yoke so as to extend between the oscillating head and the saw body and a second bearing is placed between the yoke and a bottom of the oscillating head so as to extend between the oscillating head and the saw body so that the first and second bearings rotatably hold the oscillating head to the saw body.

6. The method of assembling a surgical sagittal saw of claim 1 , wherein, in said step of pressing the oscillating head and the yoke together, a fastener is disposed over the oscillating head adjacent the trunk and urged against the yoke to press the yoke against the oscillating head.

7. The method of assembling a surgical sagittal saw of claim 1 , wherein:
in said step of providing an oscillating head, an oscillating head is provided that has a trunk with a plurality of tapered surfaces;
in said step of providing a yoke, a yoke is provided that has a plurality of tapered surfaces that define the yoke bore such that the tapered surfaces of the yoke are complementary to the tapered surfaces of the trunk of the oscillating head;
in said step of mounting the oscillating head and the yoke together, the oscillating head is seated in the bore of the yoke so that each tapered surface of the trunk of the oscillating head abuts a tapered surface of yoke so that in said step of pressing the oscillating head and the yoke together, each tapered surface of the trunk of the oscillating head presses against a tapered surface of the yoke.

8. The method of assembling a surgical sagittal saw of claim 1 , wherein, in said step of mounting the oscillating head and attached yoke to a saw body, the oscillating head and attached yoke are mounted to a saw body that includes a coupling member for releasably holding a bar of the surgical sagittal saw blade static to the saw body.

9. The method of assembling a surgical sagittal saw of claim 1 , wherein:
in said step of providing an oscillating head, an oscillating head is provided that includes: a planar top surface; and at least one drive pin that extends upwardly from the top surface, the drive pin shaped to receive a drive component of the surgical sagittal saw blade attached to the surgical sagittal saw; and
in said step of mounting the oscillating head and attached yoke to a saw body, the oscillating head and attached yoke are mounted to a saw body that includes a coupling member for holding a bar of the surgical sagittal saw blade static to the saw body, the bar being separate from the drive component of the surgical sagittal saw blade.

10. A surgical sagittal saw for actuating a surgical sagittal saw blade, said saw being manufactured according to the steps of:
providing an oscillating head, the oscillating head having: a top located feature for removably holding a surgical sagittal saw blade to the head; a longitudinal axis that extends top-to-bottom through the head; and an elongated trunk that extends along the longitudinal axis, the elongated trunk being formed with at least one tapered surface such that extending along the tapered surface from a bottom of the tapered surface to a top of the tapered surface, the distance between the longitudinal axis of the head and the tapered surface changes;
providing a yoke, the yoke having: features for engaging a drive shaft capable of oscillating the yoke; and a bore, the bore shaped to receive the trunk of the oscillating head, the bore being defined by at least one yoke tapered surface that is complementary to the tapered surface of the trunk of said oscillating head;
mounting the oscillating head to the yoke so the trunk of the oscillating head is seated in the bore of the yoke such that the tapered surface of the trunk of the oscillating head abuts the tapered surface of the yoke;
pressing the oscillating head and the yoke together so the tapered surface of the trunk of the oscillating head presses against the tapered surface of the yoke so the oscillating head and the yoke become a single unit; and
mounting the oscillating head and yoke to a saw body that includes a drive shaft so that yoke engages the drive shaft and the oscillating head is able to oscillate so that the actuation of the yoke by the drive shaft results in the back and forth oscillations of the oscillating head around the longitudinal axis of the oscillating head.

11. The surgical sagittal saw manufactured according to the method of claim 10 , wherein, in said step of providing an oscillating head, an oscillating head is provided that includes a planar top surface.

12. The surgical sagittal saw manufactured according to the method of claim 10 , wherein, in said step of providing an oscillating head, an oscillating head is provided that includes: a planar top surface; and at least one drive pin that extends upwardly from the top surface, the drive pin shaped to receive a drive component of the surgical sagittal saw blade attached to the surgi

Assignees

• Stryker Ireland Ltd
• Stryker Corp

Inventors

• Walen James G

Classifications

• Y10T29/49947

  by applying separate fastener · CPC title

• A61B17/142 Primary

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

• A61B2017/00526

  Methods of manufacturing · CPC title

• A61B2034/2068

  using pointers, e.g. pointers having reference marks for determining coordinates of body points · CPC title

• A61B2017/00734

  battery operated · CPC title