Patent Application
20120131781
Not Applicable
Not Applicable
Not Applicable
This invention relates generally to the field of saw blade reconditioning and more specifically to a method of reconditioning an oscillating power saw blade.
Saw blades of all types eventually become dull with extended use. It is a common practice to sharpen to recondition dull blades by using well known blade sharpening techniques.
One recent addition to the saw blade family is an oscillating saw blade that is used on recently developed oscillating power tools. The saw blade consists of a shank portion that attaches to the power tool, and the blade portion that is at the end of and perpendicular to the shank. These blades prove to be very difficult to sharpen due to the unique and varied size and shape of each different blade and shank.
Therefore these blades are traditionally disposed of after they become dull. Some commercial users of these blades dispose of hundreds of dull blades each month thereby incurring the high cost of replacement.
The primary object of the invention is to provide a method for reconditioning saw blades used in oscillating power tools.
Other objects and advantages of the present invention will become apparent from the following descriptions, taken in connection with the accompanying drawings, wherein, by way of illustration and example, an embodiment of the present invention is disclosed.
In accordance with a preferred embodiment of the invention, there is disclosed a saw blade reconditioning method comprising: a band saw blade member made from a portion of band saw blade material, a standard oscillating power tool blade shank having the serrated blade portion removed, a novel butt welding fixture, said band saw blade member locked into the jaws of one side of said butt welding fixture, said oscillating power tool blade shank locked into the jaws of the opposite side of said welding fixture, said butt welding tool calibrated to ideal heat rate and feed rate of jaws for butt welding said tool blade shank to said band saw blade, the leading edge of said oscillating power tool blade shank member welded to the trailing edge of said band saw blade member, said band saw blade member trimmed on its left and right ends so that the said trailing edge of said band saw blade member is a similar length to the said leading of said oscillating tool blade shank, and the weld line of said weld sanded on a radial sanding belt so that removal of excess metal provides blade clearance.
The drawings constitute a part of this specification and include exemplary embodiments to the invention, which may be embodied in various forms. It is to be understood that in some instances various aspects of the invention may be shown exaggerated or enlarged to facilitate an understanding of the invention.
Detailed descriptions of the preferred embodiment are provided herein. It is to be understood, however, that the present invention may be embodied in various forms. Therefore, specific details disclosed herein are not to be interpreted as limiting, but rather as a basis for the claims and as a representative basis for teaching one skilled in the art to employ the present invention in virtually any appropriately detailed system, structure or manner.
Referring now to
To recondition the blade 100, the serrated tooth end 2 of the blade is removed by standard cutting techniques. The shank 4 with the blade removed can be seen in the plan view of
The reconditioned oscillating power saw blade can now be re-used in conjunction with a standard oscillating power tool. The oscillating blade 50 can be reconditioned to work as well as or better than the original blade that it has replaced because top quality band saw blade material can be used in the reconstruction process. These higher quality blades can last three to four times longer than the original serrated tooth edge 2. The reconditioned blades 12 tend to generate less friction and heat in comparison to the original serrated blade edge 2. Additionally, the original shank can be reconditioned with an alternate band saw blade member having a differing serration design depending on the intended final use of the blade. In this way, the new blade 12 can have a tooth design to cut plastic, or wood or metal. The new oscillating blade 50 can also be made of different qualities of steel ranging from carbon steel to high-speed steel. Even band saw blades having carbide grit or diamond grit, instead of teeth, can be butt welded to the shank 4 for cutting especially hard items such as ceramic tile.
While the invention has been described in connection with a preferred embodiment, it is not intended to limit the scope of the invention to the particular form set forth, but on the contrary, it is intended to cover such alternatives, modifications, and equivalents as may be included within the spirit and scope of the invention as defined by the appended claims.
