Offset blade for making flush cuts with a reciprocating saw

• US 20060137498A1
• Filed: 12/29/2005
• Published: 06/29/2006
• Est. Priority Date: 12/29/2004
• Status: Abandoned Application

• Current Assignee: Scott Bowling
• Original Assignee: Scott Bowling
• Inventors: Bowling, Scott
• Application Number:
  US11/321,343
• Publication Number:
  US 20060137498A1
• Time in Patent Office: Days
• US Class Current: 83/13
• CPC Class Codes: B23D 49/11 for special purposes, e.g. offset-blade hand; Hand saws having spaced blades; Hand saws for sawing grooves or square holes
• CPC Class Codes: B23D 61/123 Details of saw blade body
• CPC Class Codes: B23D 61/126 having cutting teeth along both edges
• CPC Class Codes: Y10T 83/04 Processes
• CPC Class Codes: Y10T 83/9319 Toothed blade or tooth therefor

Abstract

An apparatus and method for allowing the cutting portion of the blade of a reciprocating saw to reciprocate along a path that is offset from the axis of reciprocation of the reciprocating saw bar is provided. The blade is made with an offset to move the the cutting portion of the saw blade away from and parallel to the axis of reciprocation of the saw bar. By offsetting the cutting portion of the blade it can be possible to make cuts that are flush with an element of the cutting situation which otherwise precludes the saw body passing through it and limits the usefulness of the saw.

Claims

1. A saw blade for mounting on a saw bar of a reciprocating saw comprising:

a blade formed of a single piece of material, the blade having a cutting portion;

an offset portion of the blade that offsets the cutting portion of the saw blade from an axis of reciprocation of the saw bar; and

the offset portion offsetting a line of cut of the saw from the axis of reciprocation of the saw bar.

2. The saw blade of claim 1 wherein the saw blade is formed to permit cutting close to an obstructing element of a cutting situation that precludes a saw body passing through the obstructing element.

3. The saw blade of claim 1 wherein the saw blade is formed to provide a cut that is substantially congruent with the intersection of a cutting surface and an obstructing element arising from the cutting surface and is substantially coplanar with the cutting surface.

4. The saw blade of claim 1 wherein the saw blade is formed to provide a cut that is substantially congruent with the intersection of a cutting surface and an obstructing element arising from the cutting surface and is substantially coplanar with the obstructing element.

5. The saw blade of claim 1 wherein offsetting angles formed in the saw blade are strengthened to reduce unwanted movement of the blade.

6. The saw blade of claim 1 wherein the saw blade is strengthened so that the cutting portion of the saw blade cuts the work without flexing the saw blade in a direction perpendicular to the direction of cutting.

7. The saw blade of claim 1 wherein the attachment portion of the blade and the offset portion of the blade are reinforced to prevent unwanted movement of the blade.

8. The saw blade of claim 1 wherein at least one portion of the blade is made of thicker material than the cutting portion of the blade to prevent unwanted movement of the blade.

9. The saw blade of claim 1 wherein the offset portion of the blade allows the cutting portion of the blade to extend beyond the front of the reciprocating saw to provide a cut up to an element in the cutting situation that prevents the saw body from passing through the element.

10. The saw blade of claim 1 wherein the saw blade employs cutting edges on both sides of the cutting portion of the blade for cutting in either of two directions.

11. A saw blade for a reciprocating saw comprising a plurality of parts for causing a cut provided by the saw blade to be offset from the axis of reciprocation of a saw bar, which is part of the reciprocating saw, to which the saw blade is attached, the saw blade further comprising:

an attachment portion of the blade for attaching the blade to the saw bar;

an offset portion of the blade for offsetting the cutting portion of the blade from the axis of reciprocation of the saw bar;

a cutting portion of the blade for supporting a leading edge of the cutting portion of the blade which supports means for cutting; and

means for attaching the parts of the blade together.

12. The saw blade of claim 11 wherein the saw blade is formed to permit cutting close to an obstructing element of a cutting situation that precludes a saw body passing through the obstructing element.

13. The saw blade of claim 11 wherein the saw blade is formed to provide a cut that is substantially congruent with the intersection of a cutting surface element and an obstructing element arising from the cutting surface and is substantially coplanar with one of the elements.

14. The saw blade of claim 11 wherein at least one portion of the blade is made of thicker material than the cutting portion of the blade to prevent unwanted movement of the blade.

15. The saw blade of claim 11 wherein the offset portion of the blade allows the cutting portion of the blade to extend beyond the front of the reciprocating saw to provide a cut up to an element in the cutting situation that prevents the saw body from passing through the element.

16. The saw blade of claim 11 wherein the saw blade employs cutting edges on both the front and back of the cutting portion of the blade for cutting in either of two directions.

17. The saw blade of claim 11 wherein the offset portion of the saw blade is adjustable according to the clearance needs of the cutting situation.

18. The saw blade of claim 11 wherein the saw blade can be offset to either side of a saw to provide flush cutting capability to either side of the saw.

19. A method for making cuts flush to a protruding element from a work surface being cut when using a reciprocating saw comprising:

making a blade for the reciprocating saw of a single piece of material;

forming the blade to include an attachment portion, an offset portion, and a cutting portion;

adjusting the length of the offset portion to allow the blade to reciprocate outside the boundaries of the saw body when attached to the saw;

applying the cutting portion to reciprocate substantially coplanar with the work surface when undercutting the protruding element;

applying the cutting portion to reciprocate substantially perpendicular to the work surface when cutting proximate the protrusion element but not under it; and

passing the saw blade through the material to be cut.

20. The method of claim 19 wherein the offset portion of the saw can be adjusted according to the clearance needs of the cutting situation.