Patent Application
20050262702
None
Research and development of this invention and Application have not been federally sponsored, and no rights are given under any Federal program.
Not applicable.
1. Field of the Invention
The present invention relates to the home remodeling and demolition industry, in general, and to the construction of a saw blade improvement for use therein, in particular.
2. Description of the Related Art
As is well known and understood, one of the most widely used tools in the home remodeling and demolition industries is a reciprocating saw. Designed for cutting on the “pull-stroke” of the reciprocating saw, such blades are often used for cutting wood, lath and metal pipes. Usually manufactured of thin flexible steel, any cutting of “metal” with a blade designed for “wood” effectively destroys the teeth. Conversely, cutting “wood” with a blade designed for cutting “metal”, takes an inordinate amount of time. Moreover, situations often arise where use of the reciprocating saw at one angle becomes difficult at a second angle where the cutting surface is not optimally positioned to work at. To deal with these situations typically requires the contractor to stop work, to turn off the electrically operating or battery powered reciprocating saw, and to either change blades to the one best suited for the job at hand, or to just flip the blade over to a better angle for use. Besides being inconvenient and an unnecessary waste of time, this becomes all the more a matter of concern when the change of blades, or the flipping over of them requires the contractor to come down a ladder before doing whatever is necessary in making the changeover, and then having to climb back up the ladder to continue the work. Obviously, it would be desirable if all these intermediate steps could somehow be eliminated.
It is an object of the present invention, therefore, to provide a construction saw blade for a reciprocating saw which can be used whether the angle of cut required be convenient or not.
It is also an object of the invention to provide such a blade capable of cutting both “wood” and “metal”.
It is another object of the invention to provide a construction saw blade for a reciprocating saw which enables a contractor to cut different types of materials being confronted on a job without having to change a blade because of a needed change in the materials confronted or because of the angle of their presentation.
As will become clear from the following description, a construction saw blade according to the invention is defined by an upper edge surface, a lower edge surface, a forwardly facing front end, and a rearwardly facing back end. Such blade will also be seen to have a first plurality of cutting teeth along the upper edge surface, a second plurality of cutting teeth along the lower edge surface, and an aperture transversely extending through the blade adjacent to the rearwardly facing back end. Such aperture, moreover, is of a configuration and dimension so as to receive a fastening means in removably securing the construction saw blade to a reciprocating saw for use. In accordance with the teachings of the invention, each of the first and second plurality of cutting teeth include rake angles for cutting substantially only on a pull-stroke of the reciprocating saw.
In one embodiment of the invention, the first plurality of teeth exhibit an inverted profile of rake angles substantially identical to the second plurality of teeth. As will be appreciated, whether the rake angles of the two pluralities exhibit profiles for cutting “wood” or cutting “metal”, this construction allows the contractor to utilize the reciprocating saw without having to flip the blade over from one angle of use to another where the positioning of the work to be done varies from site to site.
In accordance with a second embodiment of the invention, the two pluralities of teeth exhibit different profiles of rake angles—for one to be employed for cutting “wood”, for example, and for the other to be used for cutting “metal”. This will be seen quite useful so that a contractor does not have to change blades of the reciprocating saw when confronted with different materials to be cut in remodeling or demolishing the area worked on.
In accordance with yet a further embodiment of the invention, at least one of the first and second pluralities of cutting teeth may include first and second individual lengths of teeth, with each length being of different rake angle. In this manner, an extended use of the construction saw blade could be had by having, for example, lengths of “wood” cutting and “metal” cutting teeth on each of the upper edge surface of the blade and/or on the lower edge surface. As will be appreciated by those skilled in the art, this construction would be quite beneficial where the lengths of cut to be made at the site are relatively short.
These and other features of the present invention will be more clearly understood from a consideration of the following description, taken in connection with the accompanying drawings, in which:
Each of
In accordance with the invention, the blade 10 is constructed to have a first plurality of cutting teeth 22 along the upper edge surface 12, and a second plurality of cutting teeth 24 along the lower edge surface 14. As illustrated in
In particular,
In the construction of
Recognizing that some required cuts are only of a small distance and that the construction saw blade of the invention is intended to be of the same 12 inch length or so of those blades presently employed in the home remodeling and demolition industry, the construction saw blade of
In accordance with the teachings of the present invention, however, the construction saw blade of the invention will continue to be usable with a reciprocating saw by fastening the blade 10 to the saw by means of a fastener coupling with the aperture 20. At the same time, it will be appreciated that the profile of the rake angles employed continue to allow the cutting of “wood” or “metal” (or of any other material for that matter), simply on the pull-stroke of the saw as characterizes present reciprocating saw designs. As with those blades that are conventionally used nowadays, the construction saw blade of the present invention may be manufactured of a stamped steel composition, as a thin flexible steel.
While there have been described what are considered to be preferred embodiments of the present invention, it will be readily appreciated by those skilled in the art that modifications can be made without departing from the scope of the teachings herein. For at least such reason, therefore, resort should be had to the claims appended hereto for a true understanding of the invention.
