Patent Application
20140345148
The present disclosure relates to cutting blades and, more particularly, to cutting blades for use with oscillating power tools.
Oscillating power tools and cutting blades may be used for cutting various types of materials. Generally, such blades include an attachment portion for attachment to a clamping mechanism of an oscillating power tool, and one or more cutting portions for engaging a workpiece. Most such blades can cut in only one direction, e.g., by pushing or by pulling the oscillating power tool in a direction of the cutting portions.
According to a first aspect of the disclosure, an oscillating cutting blade comprises a body with an attachment mechanism to couple the body with an oscillating power tool. The attachment mechanism enables oscillation of the body by the oscillating power tool. The body includes a first cutting surface configured to cut a workpiece in a pulling direction of the oscillating power tool. The body further includes a second cutting surface configured to cut the workpiece in a pushing direction of the oscillating power tool. The body may generally have the shape of a sector of a circle bounded by first, second, and third side edges. The attachment mechanism may be positioned at or near a center of the circle. The first and second side edges may extend generally radially outward from the attachment mechanism. The third side edge may have an arcuate shape partially extending along a circumference of the circle. In one embodiment, the sector comprises approximately a 90° sector of a circle. The first cutting surface comprises a first hook shaped recess formed in the first side edge and intersecting the third edge at a first cutting tip. An inclined surface extends from the first edge towards the first cutting surface. The second cutting surface comprises a second hook shaped recess formed in the third edge and intersecting the second edge at a second cutting tip. The first and second cutting surfaces may be arcuate. The first and second cutting faces include a beveled surface.
According to a second aspect of the disclosure, an oscillating cutting blade comprises a body bound by at least a first, second and third side edge. An attachment mechanism couples the cutting blade to an oscillating power tool. The attachment mechanism enables the body to be removably coupled to the oscillating power tool. The body is to be driven in an oscillating manner by the oscillating power tool. A first cutting surface is formed as a hook-shaped recess generally facing toward the attachment mechanism. A second cutting surface, formed as a hook-shaped recess in the third side edge, intersects generally away from the attachment mechanism. The body has a shape of a sector of a circle bound by the first, second and third side edges. The first and second side edges extend generally radially outward from the attachment mechanism. The third side edge has a generally arcuate shape partially extending along a circumference of the circle.
According to a third aspect of the disclosure, an oscillating cutting blade comprises a body bound by at least a first, second and third side edge. An attachment mechanism couples the body with an oscillating power tool. The attachment mechanism enables the body to be removably coupled to the oscillating power tool and to be driven in an oscillating manner by the oscillating power tool. The body first and second side edges each have a proximal end portion adjacent the attachment mechanism. A distal end portion is positioned further away from the attachment mechanism. The third side edge extends between the distal end portions of the first and second side edges. A first cutting surface is formed as a hook-shaped recess in a distal portion of the first edge and intersects the third edge at a first cutting tip. A second cutting surface is formed as a hook-shaped recess in the third side edge and intersects a distal end portion of the second edge at a second cutting tip. The body generally has a shape of a sector of a circle bounded by the first, second, and third side edges. The first and second side edges extend generally radially outward from the attachment mechanism. The third side edge has a generally arcuate shape partially extending along a circumference of the circle.
The present oscillating cutting blade provides the art with a blade that is capable of cutting various materials such as asphalt shingles, carpet, linoleum, cardboard and the like. The blade includes a plurality of cutting edges. The blade can, for example, cut asphalt shingles through the grit side of the shingle. Additionally, the blade provides for use in both a push or pull direction.
Further areas of applicability will become apparent from the description provided herein. The description and specific examples in this summary are intended for purposes of illustration only and are not intended to limit the scope of the present disclosure.
The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present disclosure.
Example embodiments will now be described more fully with reference to the accompanying drawings.
Turning to the figures, an oscillating cutting blade is illustrated and designated with the reference numeral 10. The oscillating cutting blade 10 includes a body 12 having an attachment mechanism 14, a first cutting surface 16 and a second cutting surface 18. The attachment mechanism 14 enables cutting blade 10 to be removably coupled to an oscillating power tool 50 so that the blade can oscillate relative to the power tool 50. The illustrated attachment mechanism is similar to one of the attachment mechanisms disclosed in Applicant's pending U.S. patent application Ser. No. 13/781,900 entitled “Universal Accessory for Oscillating Power Tools”, filed Mar. 1, 2013, the specification and drawings of which are hereby incorporated by reference. The attachment mechanism may have a plurality of alternative configurations such as one of the other attachment mechanism disclosed in the aforementioned applications, or a wide array of other attachment mechanisms, which may enable the oscillating blade to one or more types of oscillating power tools.
The body 12 generally has the shape of a sector of a circle, with the sector bounded by a first side edge 20, a second side edge 22, and a third side edge 24. The attachment mechanism 14 is positioned roughly at or near a center of the circle defined by the sector-shaped body 12. The first and second side edges 20, 22 extend generally radially outward from the attachment mechanism 14. The third side edge 24 has an arcuate shape that extends partially along a circumference of the circle defined by the sector. In one embodiment, the sector comprises approximately an overall approximately 90° sector design. The body 12 is substantially flat and planar. The body is generally manufactured from a steel material, such as hardened spring steel (e.g., SK5 steel), although other suitable materials may be used. The body generally has a hardness of approximately 45 HRC to approximately 50 HRC.
Referring to
Referring to
The cutting surface 16 is arcuate and has a desired radius (R1). The radius (R1) is between approximately 10 mm and approximately 20 mm, for example 14 mm. The arc portion of the first cutting surface 16 has a circumferential length between approximately 100° and approximately 150°, for example, between approximately 125° and approximately 130°. The cutting surface 16 includes a beveled surface 30. The beveled surface extends at an angle of between approximately 25° and approximately 35°, for example, approximately 30°, with respect to the horizontal, as illustrated in
The first cutting tip 27 is angled with respect to the edge 22 on an angle γ1 between approximately 30° and approximately 40°, for example approximately 35°. This angle enhances the cutting of the workpiece during a pulling force applied onto the cutting tip 27 of the oscillating blade, as shown in
The cutting surface 18 is arcuate and has a desired radius (R2). The radius (R2) is between approximately 10 mm and approximately 20 mm, for example, 14 mm. The arc portion of the second cutting surface 18 has a circumferential length between approximately 120° and approximately 180°, for example, between approximately 135° and 140°. The cutting surface 18 includes a beveled surface 32. The beveled surface extends at an angle of between approximately 25° and approximately 35°, for example approximately 30°, with respect to the horizontal, as illustrated in
The second cutting tip 28 is angled with respect to the edge 22 on an angle γ2 between approximately 25° and approximately 35°, for example, between approximately 29° and approximately 33°. This angle enhances the cutting of the workpiece during a pushing force applied onto the cutting tip 28 of the oscillating blade as shown in
Turning to
As seen in
The foregoing description of the embodiments has been provided for purposes of illustration and description. It is not intended to be exhaustive or to limit the disclosure. Individual elements or features of a particular embodiment are generally not limited to that particular embodiment, but, where applicable, are interchangeable and can be used in a selected embodiment, even if not specifically shown or described. For example, the first, second, and/or third edges may include additional teeth and/or cutting surfaces. The body may have a shape or configuration other than the shape of a sector of a circle (e.g., generally triangular, quadrilateral, hexagonal, circular, oval, etc.). The first and second cutting surfaces may have different shapes, configurations, and sizes. The inclined surface 26 may be eliminated. The same may also be varied in many ways. Such variations are not to be regarded as a departure from the disclosure, and all such modifications are intended to be included within the scope of the disclosure.
