Surgical saw blade

• US 20020116023A1
• Filed: 02/06/2002
• Published: 08/22/2002
• Est. Priority Date: 05/30/1991
• Status: Active Grant

• Current Assignee: Henry Hasbrouck Fletcher, Michael Gerard Fisher
• Original Assignee: Henry Hasbrouck Fletcher, Michael Gerard Fisher
• Inventors: Fisher, Michael Gerard, Fletcher, Henry Hasbrouck
• Granted Patent: US 6,723,101 B2
• Time in Patent Office: Days
• US Class Current: 606/176
• CPC Class Codes: A61B 17/14 Surgical saws A61B17/1637 takes precedence; tooth saws A61C3/12 ; Accessories therefor
• CPC Class Codes: A61B 17/142 with reciprocating saw blades, e.g. with cutting edges at the distal end of the saw blades
• CPC Class Codes: B23D 51/10 for hand-held or hand-operated devices
• CPC Class Codes: B23D 61/006 Oscillating saw blades
• CPC Class Codes: B23D 61/121 Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
• CPC Class Codes: B27B 19/006 with oscillating saw blades; Hand saws with oscillating saw blades

Abstract

A cutting saw blade for use with an oscillatory power tool used in surgical bone cutting procedures including a blade having a distal end provided with teeth whose tips are located on a tangent line perpendicular to the long axis of the blade. The teeth are configured substantially as right triangles with their hypotenuses facing either towards the center of the blade or away from the center of the blade. A central tooth can be optionally provided.

Claims

1. - A surgical cutting saw for penetrating bone when said saw is operatively coupled to an oscillatory power tool, comprising, in combination:

a blade having a proximal end and a distal end,

said proximal end having means for attachment to the oscillatory power tool for driving engagement thereby,

said distal end having a plurality of cutting teeth oriented such that outboard said teeth contact the bone to be cut initially to thereby provide better tracking of said saw when forming a kerf in the bone, and the teeth then cut both progressively and sequentially as the kerf begins to form to provide faster aggressive cutting and lower temperature cutting through efficient chip removal.

2. - The device of claim 1 wherein each said tooth has a tip, and each said tip terminates in a line which is substantially perpendicular to the long axis of said blade.

3. - The device of claim 2 wherein said teeth on said distal end are each fabricated as a substantially isosceles triangle.

4. - The device of claim 2 wherein said teeth are substantially formed as right triangles.

5. - The device of claim 4 wherein said right triangles are oriented such that a hypotenuse of said tooth faces towards a center of said blade.

6. - The device of claim 4 wherein said right triangles are oriented such that a hypotenuse of said tooth faces away from a center of said blade.

7. - The device of claim 5 wherein said center of said blade along said cutting teeth includes a central void having an inverted isosceles configuration formed by two said hypotenuses.

8. - The tooth configuration of claim 6 wherein said center of said teeth include a substantially isosceles triangular tooth.

9. - A cutting blade for an oscillatory cutter, comprising, in combination:

a blank of substantially planar stock having a long axis and having a proximal end with means for fastening to the oscillatory cutter and a distal end remote from the cutter,

said distal end including a plurality of teeth oriented with respect to the long axis such that when the cutter is not running and the long axis bisects a total range of travel of the cutter, a plunge cut along the long axis progressively involves all said blade teeth.

10. - The blade of claim 9 wherein each said tooth has a tip, and each said tip terminates in a line which is substantially perpendicular to the long axis of said blade.

11. - The blade of claim 10 wherein said teeth on said distal end are each fabricated as a substantially isosceles triangle.

12. - The blade of claim 10 wherein said teeth are substantially formed as right triangles.

13. - The blade of claim 12 wherein said right triangles are oriented such that a hypotenuse of said tooth faces towards a center of said blade.

14. - The blade of claim 12 wherein said right triangles are oriented such that a hypotenuse of said tooth faces away from a center of said blade.

15. - The blade of claim 13 wherein said center of said blade along said cutting teeth includes a central void having an inverted isosceles configuration formed by two said hypotenuses.

16. - The blade of claim 14 wherein said center of said teeth include a substantially isosceles triangular tooth.

18. - The method of claim 17 including the steps of having each tooth which next touches the kerf remove bone progressively.

19. - The method of claim 18 including the step of having half of the cutting teeth be away from bone contact for clearing bone chips therefrom while another half is working.

20. - The method of claim 19 including allowing the half of the cutting teeth to cool while out of contact from the bone.

17. - A method for the surgical cutting of bone, the steps including, contacting the bone with an oscillatory cutter having a blade with teeth such that, only initially, a multiplicity of different teeth contact the bone substantially simultaneously, thereby forming a somewhat linear kerf,

thereafter forming the kerf substantially V-shaped by having each tooth alternately and sequentially contacting the kerf.