Patent Application
20090031568
1. Field of the Invention
The present invention relates to a saw blade, and more particularly to a saw blade including a flexible and/or helical structure and including an outer peripheral cutting edge for allowing the saw blade to be tilted relative to the work pieces and for allowing the saw blade to easily cut the work pieces without being maintained or arranged perpendicular to the work pieces.
2. Description of the Prior Art
Typical saw blades comprise an elongate blade member having a cutting edge formed on one side edge of the blade member for working or cutting the work pieces.
For example, U.S. Pat. No. 5,684,388 to Theising et al., and U.S. Pat. No. 6,044,743 to O'Banion et al., and U.S. Pat. No. 6,393,957 to Wang disclose three of the typical scroll saw devices each also including a cutting edge formed on one side edge of the elongate blade member for working or sawing or cutting the work pieces.
However, due to the elongate and planar shape of the blade member, the blade member should be maintained or arranged perpendicular to the work pieces, otherwise, the blade member may have a good chance to be broken or damaged while sawing or cutting the work pieces.
U.S. Pat. No. 5,048,389 to Carlton discloses a typical circular saw blade with saw chain providing cutter links coupled between or within chains.
However, similarly, the blade members or the cutter links should also be maintained or arranged perpendicular to the work pieces, otherwise, the blade members or the cutter links may have a good chance to be broken or damaged while sawing or cutting the work pieces.
The present invention has arisen to mitigate and/or obviate the afore-described disadvantages of the conventional saw blades or circular saw blades.
The primary objective of the present invention is to provide a saw blade including a flexible and/or helical structure and including an outer peripheral cutting edge for allowing the saw blade to be tilted relative to the work pieces and for allowing the saw blade to easily cut the work pieces without being maintained or arranged perpendicular to the work pieces.
In accordance with one aspect of the invention, there is provided a saw blade comprising an elongate and helical blade member including an outer peripheral cutting edge formed therein for allowing the blade member to be engaged into and engaged around a work piece without being maintained perpendicular to the work pieces.
The blade member includes two elongate and planar blade elements superposed with each other and each having the cutting edge formed thereon.
The cutting edges are formed on an outer portion of the blade elements respectively and extended out of an inner portion of the other blade elements. The blade elements are twisted to form the blade member.
The blade member includes two end portions, and two hand grips attached to the end portions of the blade member respectively.
The blade member includes two end fittings attached to the end portions of the blade member for coupling to the hand grips respectively. The blade member includes two links coupled between the end fittings and the hand grips respectively.
Further objectives and advantages of the present invention will become apparent from a careful reading of the detailed description provided hereinbelow, with appropriate reference to the accompanying drawings.
Referring to the drawings, and initially to
Two couplers or end fittings 20 may be solidly attached or engaged or secured to the end portions 12 of the elongate blade member 10 respectively (
As shown in
As best shown in
Accordingly, the saw blade in accordance with the present invention includes a flexible and/or helical structure and including an outer peripheral cutting edge for allowing the saw blade to be tilted relative to the work pieces and for allowing the saw blade to easily cut the work pieces without being maintained or arranged perpendicular to the work pieces.
Although this invention has been described with a certain degree of particularity, it is to be understood that the present disclosure has been made by way of example only and that numerous changes in the detailed construction and the combination and arrangement of parts may be resorted to without departing from the spirit and scope of the invention as hereinafter claimed.
