Double-sided saw blade

FIELD OF THE INVENTION

[0001] The present invention relates to saw blades used in reciprocal saws, jigsaws, and other such saws.

BACKGROUND OF THE INVENTION

[0002] Construction workers use electrical saws with removable blades for a variety of uses. A saw such as a reciprocal saw or a jig saw may be used with a variety of blades, depending upon the material being cut. A worker who is cutting a structure such as a roof may encounter several different materials. For example, while cutting a roof, the worker may encounter wood, asphalt shingles and nails. The worker using a saw made to cut wood has to stop cutting, and change to a blade to cut metal in order to cut through the nail without ruining the blade for cutting wood.

[0003] In addition, construction workers frequently must cut materials from awkward positions, and to facilitate cutting, reverse the blade in the saw so that the saw can be used from a different angle. The worker must therefore stop working, remove the blade, reverse the blade, and then reattach the blade to the saw.

[0004] It is therefore an object of the present invention to provide a double-sided saw blade, which may have different cutting patterns on either side of the blade, in order to allow cutting of different materials without changing the saw blade.

[0005] It is a further object of the invention to provide a double-sided saw blade in order to allow cutting of materials using either side of the saw blade while using the saw from different angles.

[0006] It is also an object of the invention to provide a saw blade that reduces strain on a power tool by easily providing the correct blade.

[0007] It is an additional object of the invention to provide a saw blade that has a longer life.

[0008] These and other objects and features are provided by the invention, as is described in the following specification and claims.

SUMMARY OF THE INVENTION

[0009] The present invention is a two-sided saw blade for use in reciprocal saws, jigsaws, and other such saws. One side of the blade may have a different cutting pattern from the other side, to allow cutting of different materials without changing the saw blade. In an alternate embodiment, the two sides have identical patterns, which allows use of the saw from different angles.

[0010] According to the invention, an elongated substantially flat saw blade is comprised of a first blade end for enabling selective attachment of the saw blade with a reciprocal saw, an opposite second blade end, a first longitudinal cutting edge, and a second longitudinal cutting edge opposed to the first cutting edge. Each cutting edge is comprised of a plurality of slicing teeth. The slicing teeth on the first cutting edge are arranged for cutting a first material, and the slicing teeth on the second cutting edge are arranged for cutting a second material.

BRIEF DESCRIPTION OF THE DRAWINGS

[0011]FIG. 1 is a side sectional view of a prior-art saw blade.

[0012]FIG. 2 is a side sectional view of a double-sided saw-blade device in accordance with an embodiment of this invention.

[0013] While only the preferred form of the invention is illustrated in the drawings, it will be apparent that certain modifications could be made without departing what is claimed.

DETAILED DESCRIPTION OF THE INVENTION

[0014] Referring now to FIG. 1, a prior art saw blade <b>10</b> is shown. The prior art saw blade <b>10</b> comprises an elongated, substantially flat body <b>12</b> having a ½″ universal tang end <b>14</b> and a distal tip end <b>16</b>, and a cutting edge <b>18</b>. FIG. 2 shows one embodiment of the double-sided saw blade <b>20</b> according to the present invention. The blade is for use in a motor-driven reciprocating blade hand saw such as a “Sawzall” manufactured by the Milwaukee Electric Tool Corporation. These types of hand-held reciprocating saws have a reciprocating spindle driven by the motor to which the saw blade is removably attached.

[0015] The double-sided saw blade <b>20</b> according to the present invention comprises an elongated, substantially flat body <b>22</b> having a ½″ universal tang end <b>24</b> and a distal tip end <b>26</b>, a first longitudinal cutting edge <b>28</b> and a spaced apart second longitudinal cutting edge <b>30</b>. As shown in FIG. 2, the first cutting edge <b>28</b> has cutting teeth configured to cut wood, and the second cutting edge <b>30</b> has cutting teeth configured to cut metal. The different cutting edges allow a worker to cut two different materials without removing the blade and reinserting a new blade. In the illustrated embodiment, the cutting teeth on the first cutting edge are arranged for cutting a first material, and the slicing teeth on the second cutting edge are arranged for cutting a second material, however, in an alternate embodiment, both cutting edges may have the same configuration of teeth, for example, if a construction worker is cutting only one type of material, but desires to cut it from two directions. It is well known in the prior art to arrange the cutting teeth of a cutting edge of a saw blade according to the material being cut. The teeth may be of different heights, widths, and the teeth may be spaced apart by various distances. According to the present invention, different types of material may be cut using only one blade.

[0016] In alternate embodiments, the double-sided blade can also be used in other types of electric hand saws, such as a jigsaw and other such tools.

[0017] In one embodiment of the invention, the angle of the tang end <b>24</b> is modified from that used in prior art saw blades. As shown in FIG. 2, the tang end <b>25</b> of the saw blade extends ¾″ from the saw blade and at an angle parallel to the second cutting edge <b>30</b>. In an alternate embodiment, the tang end <b>24</b> is similar to that of the prior art blade shown in FIG. 1.