US20120042765A1 - Reciprocating saw blade - Google Patents
Reciprocating saw blade Download PDFInfo
- Publication number
- US20120042765A1 US20120042765A1 US13/213,656 US201113213656A US2012042765A1 US 20120042765 A1 US20120042765 A1 US 20120042765A1 US 201113213656 A US201113213656 A US 201113213656A US 2012042765 A1 US2012042765 A1 US 2012042765A1
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- United States
- Prior art keywords
- saw blade
- plane
- cutting
- tooth
- approximately
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
- B23D61/12—Straight saw blades; Strap saw blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D49/00—Machines or devices for sawing with straight reciprocating saw blades, e.g. hacksaws
- B23D49/10—Hand-held or hand-operated sawing devices with straight saw blades
- B23D49/11—Hand-held or hand-operated sawing devices with straight saw blades for special purposes, e.g. offset-blade hand; Hand saws having spaced blades; Hand saws for sawing grooves or square holes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
- B23D61/12—Straight saw blades; Strap saw blades
- B23D61/121—Types of set; Variable teeth, e.g. variable in height or gullet depth; Varying pitch; Details of gullet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
- B23D61/12—Straight saw blades; Strap saw blades
- B23D61/123—Details of saw blade body
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T83/00—Cutting
- Y10T83/929—Tool or tool with support
- Y10T83/9319—Toothed blade or tooth therefor
Definitions
- the present invention relates to saw blades and, more particularly, to saw blades for use with reciprocating saws.
- Saw blades such as reciprocating saw blades, are used for cutting wood, metal, plastics, and other materials.
- a saw blade typically includes a body, an attachment portion, and a cutting portion.
- the cutting portion includes a plurality of teeth made up of one or more tooth forms.
- the invention provides a saw blade for use with a reciprocating saw.
- the saw blade includes a body and an attachment portion extending from the body.
- the attachment portion includes a tang and an aperture configured to connect to the reciprocating saw.
- the saw blade also includes a cutting portion formed on the body.
- the cutting portion includes a plurality of cutting teeth and a floor guard tooth positioned adjacent at least one of the plurality of cutting teeth.
- Each cutting tooth has a tip that defines a plane.
- the floor guard tooth extends from the body beyond the plane.
- the attachment portion is offset from the plane to reduce interference of the reciprocating saw with a surface while performing a footer cut with the saw blade.
- the floor guard tooth contacts the surface while performing the footer cut to inhibit the plurality of cutting teeth from contacting the surface.
- the invention provides a saw blade for use with a reciprocating saw.
- the saw blade includes a body having a back edge and defining an opening, and an attachment portion extending from the body.
- the attachment portion includes a tang and an aperture configured to connect to the reciprocating saw.
- the saw blade also includes a cutting portion formed on the body opposite the back edge.
- the cutting portion includes a plurality of cutting teeth. Each cutting tooth has a tip that defines a plane.
- the body has a first height measured generally perpendicularly from the back edge to the plane.
- the attachment portion has a second height measured generally perpendicular to the plane. A ratio of the first height to the second height is between approximately 4 and approximately 5.
- the opening facilitates flexing of the body while performing a flush cut with the saw blade.
- the invention provides a saw blade for use with a reciprocating saw.
- the saw blade includes a body having a back edge and defining an opening, and an attachment portion extending from the body.
- the attachment portion includes a tang and an aperture configured to connect to the reciprocating saw.
- the saw blade also includes a cutting portion formed on the body opposite the back edge.
- the cutting portion includes a plurality of cutting teeth, a first floor guard tooth positioned adjacent at least one of the plurality of cutting teeth, and a second floor guard tooth spaced apart from the first floor guard tooth and positioned adjacent at least one of the plurality of cutting teeth.
- Each cutting tooth has a tip that defines a plane. The first floor guard tooth and the second floor guard tooth extend from the body beyond the plane.
- the body has a first height measured generally perpendicularly from the back edge to the plane.
- the attachment portion has a second height measured generally perpendicular to the plane. A ratio of the first height to the second height is between approximately 4 and approximately 5.
- the opening facilitates flexing of the body while performing a flush cut with the saw blade.
- the attachment portion is offset from the plane to reduce interference of the reciprocating saw with a surface while performing a footer cut with the saw blade.
- the first floor guard tooth and the second floor guard tooth contact the surface while performing the footer cut to inhibit the plurality of cutting teeth from contacting the surface.
- FIG. 1 illustrates a saw blade according to one embodiment of the invention.
- FIG. 2 is an enlarged view of a portion of the saw blade shown in FIG. 1 .
- FIG. 3 illustrates the saw blade of FIG. 1 connected to a reciprocating saw and performing a footer cut.
- FIG. 4 illustrates the saw blade of FIG. 1 connected to the reciprocating saw and performing a flush cut.
- FIG. 5 illustrates a saw blade according to another embodiment of the invention.
- FIG. 1 illustrates a saw blade 10 according to one embodiment of the invention.
- the illustrated saw blade 10 is a reciprocating saw blade for use with a power tool such as, for example, a reciprocating saw 14 ( FIGS. 3 and 4 ).
- the saw blade 10 includes a body 18 , an attachment portion 22 for connecting the blade 10 to the reciprocating saw 14 , and a cutting portion 26 defining a plane 30 .
- the body 18 , the attachment portion 22 , and the cutting portion 26 are integrally formed as a single piece such that the saw blade 10 is a unitary structure.
- the saw blade 10 may be formed from several pieces that are welded or otherwise secured together.
- the body 18 includes a nose portion 34 , an extension portion 38 , and a main body portion 42 .
- the body 18 also includes a back edge 46 extending between the extension portion 38 and the main body portion 42 .
- the nose portion 34 is relatively narrow (i.e., short) compared to the main body portion 42 and extends from the main body portion 42 .
- a leading edge 50 of the main body portion 42 is oriented at an angle A 1 relative to the back edge 46 to transition to the nose portion 34 .
- the leading edge 50 offsets the nose portion 34 from the back edge 46 .
- the angle A 1 of the leading edge 50 relative to the back edge 46 is approximately 45 degrees. In other embodiments, the angle A 1 may be larger or smaller.
- the extension portion 38 is also relatively narrow compared to the main body portion 42 and supports the attachment portion 22 .
- the extension portion 38 extends from the main body portion 42 in a direction opposite the nose portion 34 such that the attachment portion 22 defines a first end 54 of the body 18 and the nose portion 34 defines a second end 58 of the body 18 .
- the back edge 46 is generally continuous and planar between the extension portion 38 and the main body portion 42 .
- the main body portion 42 is taller than the nose portion 34 and the extension portion 38 and defines three openings 62 , 66 , 70 .
- the first and second openings 62 , 66 are generally the same shape and size, but are inverted relative to one another. In the illustrated embodiment, the first and second openings 62 , 66 are generally triangular-shaped such that the main body portion 42 resembles a truss.
- a web 74 of the main body portion 42 extends between the first opening 62 and the second opening 66 to separate the openings 62 , 66 .
- the first and second openings 62 , 66 are thereby completely bounded by the body 18 .
- the third opening 70 is formed as a cutout in a trailing edge 78 of the main body portion 42 .
- the trailing edge 78 also defines a third end 82 of the body 18 .
- the openings 62 , 66 , 70 remove material from the body 18 to facilitate flexing the body 18 while performing a flush cut ( FIG. 4 ) with the saw blade 10 .
- the illustrated body 18 of the saw blade 10 has an overall length L 1 and an overall height H 1 .
- the overall length L 1 is measured generally parallel to the plane 30 from the first end 54 of the body 18 to the second end 58 of the body 18 .
- the overall height H 1 is measured generally perpendicularly from the back edge 46 of the body 18 to the plane 30 .
- the overall length L 1 is between approximately 8 inches and approximately 12 inches, and the overall height H 1 is between approximately 2 inches an approximately 2.5 inches.
- a ratio of the overall height H 1 to the overall length L 1 is between approximately 0.17 and approximately 0.31.
- the relatively large overall height H 1 of the body 18 helps guide the saw blade 10 along a surface while performing a flush cut ( FIG. 4 ).
- the overall length L 1 is approximately 12 inches and the overall height H 1 is approximately 2.1 inches such that the ratio of the overall height H 1 to the overall length L 1 is approximately 0.18.
- the overall height H 1 of the saw blade 10 is maintained through approximately 60 percent of the overall length L 1 of the blade 10 .
- a distance L 2 from the first end 54 of the body 18 to the point where the body 18 begins to transition to the nose portion 34 is approximately 7.625 inches.
- the height of the saw blade 10 is reduced to that of a conventional reciprocating saw blade.
- the distance L 2 from the first end 54 of the body 18 to the leading edge 50 may be relatively longer or shorter.
- the illustrated extension portion 38 has a height H 2 measured generally perpendicular to the back edge 46 of the body 18 .
- the height H 2 of the extension portion 38 is significantly less than the overall height H 1 of the saw blade 10 .
- a ratio of the overall height H 1 to the extension portion height H 2 is between approximately 2.7 and approximately 3.3.
- the extension portion height H 2 is approximately 0.75 inches and the ratio is approximately 2.8.
- the extension portion height H 2 may be relatively larger or smaller.
- the attachment portion 22 extends from the body 18 and includes a tang 86 and an aperture 90 .
- the tang 86 and the aperture 90 are configured to engage a blade clamp of a reciprocating saw to securely and releasably connect the blade 10 to the saw.
- the attachment portion 22 extends from the body 18 at a zero degree tang angle (i.e., the attachment portion 22 extends generally parallel to the plane 30 ).
- the attachment portion 22 may extend from the body 18 at an oblique angle such that the saw blade 10 reciprocates at an angle relative to a reciprocating saw.
- the attachment portion 22 has a height H 3 measured generally perpendicular to the plane 30 . Similar to the extension portion 38 , the height H 3 of the attachment portion 22 is significantly less than the overall height H 1 of the body 18 . In some embodiments, a ratio of the overall height H 1 to the attachment portion height H 3 is between approximately 4 and approximately 5. In the illustrated embodiment, the height H 3 of the attachment portion 22 is approximately 0.5 inches and the ratio of the overall height H 1 to the attachment portion height H 3 is approximately 4.2. In other embodiments, the attachment portion height H 3 may be relatively larger or smaller.
- the attachment portion 22 is offset from the plane 30 and from the third end 82 of the body 18 to facilitate performing a footer cut ( FIG. 3 ) with the saw blade 10 .
- the attachment portion 22 is spaced a first offset distance H 4 , measured generally perpendicular to the plane 30 , from the plane 30 .
- the attachment portion 22 is also spaced a second offset distance L 3 , measured generally parallel to the plane 30 , from the third end 82 of the body 18 .
- the first and second offset distances H 4 , L 3 provide clearance between the attachment portion 22 and the cutting portion 26 to reduce interference from a connected reciprocating saw while performing cuts in constricted areas.
- a ratio of the first offset distance H 4 to the overall height H 1 of the saw blade 10 is between approximately 0.6 and approximately 0.8, and a ratio of the second offset distance L 3 to the overall length L 1 of the saw blade 10 is between approximately 0.2 and approximately 0.4.
- the first offset distance H 4 is approximately 1.5 inches and the second offset distance L 3 is approximately 2.8 inches.
- the first and second offset H 4 , L 3 distances may be larger or smaller.
- the cutting portion 26 extends from the second end 58 of the body 18 to the third end 82 of the body 18 .
- the cutting portion 26 includes a plurality of cutting teeth 94 and a tip portion 98 .
- the cutting teeth 94 are generally similarly shaped and sized to define a tooth form along the body 18 .
- the cutting teeth 94 are separated by a plurality of gullets 102 .
- each cutting tooth 94 includes a tip 106 , a rake face 110 , and a relief face 114 .
- the tips 106 of the cutting teeth 94 define the plane 30 of the cutting portion 26 .
- Each cutting tooth 94 has a height H 5 measured generally perpendicular to the plane 30 from a base 118 of a corresponding gullet 102 to the plane 30 .
- the height H 5 of each tooth 94 is approximately 0.1 inches. In other embodiments, the height H 5 of the teeth 94 may be relatively larger or smaller or may vary along the cutting portion 26 .
- the tip portion 98 is formed on the nose portion 34 of the body 18 at the second end 58 .
- the illustrated tip portion 98 is a plunge point including an enlarged first gullet 122 for initiating a plunge cut with the saw blade 10 .
- the cutting portion 26 may include different tip configurations for initiating a plunge cut.
- the tip portion 98 may simply define an end of the tooth form and may not be specifically configured for performing a plunge cut.
- the illustrated cutting portion 26 also includes two floor guard teeth 126 , 130 extending from the body 18 .
- the cutting portion 26 may include fewer or more floor guard teeth, or the floor guard teeth may be omitted.
- the first floor guard tooth 126 is positioned toward the second end 58 of the body 18 between two cutting teeth 94 .
- the illustrated first floor guard tooth 126 is spaced apart from the second end 58 such that the first floor guard tooth 126 does not interfere with plunge cuts.
- the second floor guard tooth 130 is positioned at the third end 82 of the body 18 adjacent a single cutting tooth 94 .
- the first and second floor guard teeth 126 , 130 are spaced apart from each other to minimize interference when cutting through a board.
- the first floor guard tooth 126 is positioned far enough away from the second floor guard tooth 130 such that the teeth 126 , 130 remain on opposite sides of and do not contact the board as the saw blade 10 is reciprocated.
- the floor guard teeth 126 , 130 may be spaced at least 6.5 inches apart from each other to cut through a 2 ⁇ 6 board.
- the first floor guard tooth 126 is spaced approximately 7.25 inches apart from the second floor guard tooth 130 .
- the floor guard teeth 126 , 130 may be spaced closer to or further from each other to cut through 2 ⁇ 4, 2 ⁇ 8, or 2 ⁇ 10 boards.
- the illustrated floor guard teeth 126 , 130 are spaced apart from the cutting teeth 94 by one of the gullets 102 . In other embodiments, the floor guard teeth 126 , 130 may be spaced further apart from the cutting teeth 94 such that a larger gullet or dead space is present between the floor guard teeth 126 , 130 and the cutting teeth 94 .
- Each floor guard tooth 126 , 130 is generally rounded and includes a relatively flat contact surface 134 , 138 .
- the contact surfaces 134 , 138 are generally parallel to the plane 30 .
- the contact surfaces 134 , 138 of the floor guard teeth 126 , 130 contact a floor or other surface while performing a footer cut ( FIG. 3 ) with the saw blade 10 to inhibit the cutting teeth 94 from contacting the floor surface.
- Each floor guard tooth 126 , 130 is generally longer than each cutting tooth 94 .
- the floor guard teeth 126 , 130 are at least twice as long as each cutting tooth 94 .
- a length L 4 of the illustrated first floor guard tooth 126 ( FIG. 2 ) is approximately equal to the length of two adjacent cutting teeth 94 , including the gullet 102 positioned therebetween.
- a length of the illustrated second floor guard tooth 130 is approximately equal to the length of two adjacent cutting teeth 94 , but without a gullet positioned therebetween.
- the floor guard teeth 126 , 130 may be relatively longer or shorter.
- the floor guard teeth 126 , 130 are also generally taller than the cutting teeth 94 such that the floor guard teeth 126 , 130 extend from the body 18 beyond the plane 30 .
- the first floor guard tooth has a height H 6 measured generally perpendicular to the plane 30 from the base 118 of a corresponding gullet 102 to the contact surface 134 .
- a ratio of the floor guard tooth height H 6 to the cutting tooth height H 5 is approximately 1.1.
- the floor guard tooth height H 6 is approximately 0.11 inches such that the first floor guard tooth 126 extends approximately 0.01 inches beyond the plane 30 .
- the second floor guard tooth 130 has approximately the same height as the first floor guard tooth 126 and extends beyond the plane 30 approximately the same distance. In other embodiments, the first and second floor guard teeth 126 , 130 may have different heights.
- the cutting teeth 94 are set relative to the body 18 of the saw blade 10 .
- the cutting teeth 94 between the second end 58 of the body 18 and the first floor guard tooth 126 are unset. Leaving these teeth 94 unset facilitates making straight and smooth cuts with the saw blade 10 along the side of, for example, a window framing board.
- the unset teeth 94 allow the nose portion 32 of the saw blade 10 to lay flush against a framing board to minimize damage to the board while cutting. At least some of the cutting teeth 94 between the first and second floor guard teeth 126 , 130 are set.
- the cutting teeth 94 between the floor guard teeth 126 , 130 may be arranged such that one tooth is set in a first direction, the first subsequent tooth is set in a second direction, the second subsequent tooth is set in the first direction, the third subsequent tooth is set in the second direction, and the fourth subsequent tooth is unset. This pattern is repeated along the cutting portion 26 . In the illustrated embodiment, all of the cutting teeth 94 immediately adjacent the first and second floor guard teeth 126 , 130 are unset. In other embodiments, the cutting teeth 94 may be set in other patterns along the tooth form.
- FIG. 3 illustrates the saw blade 10 performing a footer cut.
- the saw blade 10 is used to cut a board 142 , or other piece of material, that is directly adjacent a floor surface 146 .
- the attachment portion 22 is inserted into the reciprocating saw 14 to connect the saw blade 10 to the saw 14 . Since the attachment portion 22 is offset vertically and horizontally from the cutting portion 26 as described above, the reciprocating saw 14 is likewise offset from the cutting portion 26 . The offset reduces, or even eliminates, interference of the reciprocating saw 14 with the floor surface 146 as the saw blade 10 cuts through the board 142 .
- the cutting teeth 94 would normally contact the floor surface 146 (which may be made of, for example, concrete), possibly breaking, dulling, or otherwise damaging the teeth 94 . Since the floor guard teeth 126 , 130 extend further from the body 18 than the cutting teeth 94 , the floor guard teeth 126 , 130 contact the floor surface 146 and inhibit the cutting teeth 94 from contacting the floor surface 146 . The floor guard teeth 126 , 130 also help protect relatively softer surfaces (e.g., wood floors) by inhibiting the cutting teeth 94 from contacting and cutting into the soft surfaces.
- relatively softer surfaces e.g., wood floors
- Providing at least two spaced apart floor guard teeth 126 , 130 creates two points of contact between the saw blade 10 and the floor surface 146 to reduce the possibility of the saw blade 10 tilting relative to the floor surface 146 while performing the cut.
- providing the attachment portion 22 at the zero degree tang angle makes the saw blade 10 come down generally perpendicular to the floor surface 146 such that both floor guard teeth 126 , 130 contact the surface 146 at the same time.
- FIG. 4 illustrates the saw blade 10 performing a flush cut.
- the saw blade 10 is used to cut a board or work piece 150 that is directly adjacent a relatively flat surface, such as a floor surface 154 .
- Such cuts are typically difficult to perform so close to the floor surface 154 because the relatively wide reciprocating saw 14 contacts the floor surface 154 and prevents a conventional saw blade from cutting directly against the surface 154 .
- the openings 62 , 66 , 70 of the illustrated saw blade 10 facilitate performing the flush cut by reducing the stiffness of the saw blade 10 along its length.
- the openings 62 , 66 , 70 facilitate flexing or bending of the body 18 of the saw blade 10 .
- the relatively large overall height H 1 of the saw blade 10 increases tracking of the blade 10 along the floor surface 154 to facilitate cutting in a straight line.
- the large overall height H 1 also reduces the possibility of the saw blade 10 “walking” into and damaging a framing board when performing a flush cut along the framing board.
- FIG. 5 illustrates a saw blade 210 according to another embodiment of the invention.
- the illustrated saw blade 210 is similar to the saw blade 10 discussed above. Differences between the saw blades 10 , 210 are discussed in detail below.
- the saw blade 210 is a reciprocating saw blade and includes a body 214 , an attachment portion 218 , and a cutting portion 222 .
- the body 214 includes a relatively short nose portion 226 compared to the nose portion 34 of the saw blade 10 shown in FIG. 1 .
- the overall height of the illustrated saw blade 210 is thereby maintained through a larger percentage of its overall length.
- the body 214 also defines three openings 230 , 234 , 238 to increase the flexibility of the saw blade 210 .
- the first opening 230 is considerably larger than the second opening 234 .
- the first opening 230 is bounded on four sides such that the first opening 230 is a quadrilateral, while the second opening 234 is bounded on three sides such that the second opening 234 is a triangle.
- the illustrated third opening 238 is formed as a cutout in a trailing edge 242 of the body.
- the cutting portion 222 includes a plurality of cutting teeth 246 and two floor guard teeth 250 , 254 .
- the first floor guard tooth 250 is spaced from a second end 258 of the body 214 and positioned between two cutting teeth 246 .
- the second floor guard tooth 254 is spaced from a third end 262 of the body 214 and also positioned between two cutting teeth 246 .
- the floor guard teeth 250 , 254 extend from the body 214 further than the cutting teeth 246 to inhibit the cutting teeth 246 from contacting a floor surface while performing a footer cut.
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Abstract
A saw blade for use with a reciprocating saw includes a body and an attachment portion extending from the body. The attachment portion includes a tang and an aperture configured to connect to the reciprocating saw. The saw blade also includes a cutting portion formed on the body. The cutting portion includes a plurality of cutting teeth and a floor guard tooth positioned adjacent at least one of the plurality of cutting teeth. Each cutting tooth has a tip that defines a plane. The floor guard tooth extends from the body beyond the plane. The attachment portion is offset from the plane to reduce interference of the reciprocating saw with a surface while performing a footer cut with the saw blade. The floor guard tooth contacts the surface while performing the footer cut to inhibit the plurality of cutting teeth from contacting the surface.
Description
- This application claims priority to U.S. Provisional Application No. 61/375,582, filed Aug. 20, 2010 by Austin J. Kazda, Robert W. Butzen, and Andrew J. Schulz, and titled “RECIPROCATING SAW BLADE,” the entire contents of which are incorporated herein by reference.
- The present invention relates to saw blades and, more particularly, to saw blades for use with reciprocating saws.
- Saw blades, such as reciprocating saw blades, are used for cutting wood, metal, plastics, and other materials. A saw blade typically includes a body, an attachment portion, and a cutting portion. The cutting portion includes a plurality of teeth made up of one or more tooth forms. When a saw blade is attached to a reciprocating saw, it is often difficult to cut through materials directly adjacent (e.g., on top of) a floor or other hard surface, due to the geometry of the saw blade and the shape and size of the reciprocating saw. In addition, it is often difficult to perform cuts that are flush against another board or surface.
- In one embodiment, the invention provides a saw blade for use with a reciprocating saw. The saw blade includes a body and an attachment portion extending from the body. The attachment portion includes a tang and an aperture configured to connect to the reciprocating saw. The saw blade also includes a cutting portion formed on the body. The cutting portion includes a plurality of cutting teeth and a floor guard tooth positioned adjacent at least one of the plurality of cutting teeth. Each cutting tooth has a tip that defines a plane. The floor guard tooth extends from the body beyond the plane. The attachment portion is offset from the plane to reduce interference of the reciprocating saw with a surface while performing a footer cut with the saw blade. The floor guard tooth contacts the surface while performing the footer cut to inhibit the plurality of cutting teeth from contacting the surface.
- In another embodiment, the invention provides a saw blade for use with a reciprocating saw. The saw blade includes a body having a back edge and defining an opening, and an attachment portion extending from the body. The attachment portion includes a tang and an aperture configured to connect to the reciprocating saw. The saw blade also includes a cutting portion formed on the body opposite the back edge. The cutting portion includes a plurality of cutting teeth. Each cutting tooth has a tip that defines a plane. The body has a first height measured generally perpendicularly from the back edge to the plane. The attachment portion has a second height measured generally perpendicular to the plane. A ratio of the first height to the second height is between approximately 4 and approximately 5. The opening facilitates flexing of the body while performing a flush cut with the saw blade.
- In yet another embodiment, the invention provides a saw blade for use with a reciprocating saw. The saw blade includes a body having a back edge and defining an opening, and an attachment portion extending from the body. The attachment portion includes a tang and an aperture configured to connect to the reciprocating saw. The saw blade also includes a cutting portion formed on the body opposite the back edge. The cutting portion includes a plurality of cutting teeth, a first floor guard tooth positioned adjacent at least one of the plurality of cutting teeth, and a second floor guard tooth spaced apart from the first floor guard tooth and positioned adjacent at least one of the plurality of cutting teeth. Each cutting tooth has a tip that defines a plane. The first floor guard tooth and the second floor guard tooth extend from the body beyond the plane. The body has a first height measured generally perpendicularly from the back edge to the plane. The attachment portion has a second height measured generally perpendicular to the plane. A ratio of the first height to the second height is between approximately 4 and approximately 5. The opening facilitates flexing of the body while performing a flush cut with the saw blade. The attachment portion is offset from the plane to reduce interference of the reciprocating saw with a surface while performing a footer cut with the saw blade. The first floor guard tooth and the second floor guard tooth contact the surface while performing the footer cut to inhibit the plurality of cutting teeth from contacting the surface.
- Other aspects of the invention will become apparent by consideration of the detailed description and accompanying drawings.
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FIG. 1 illustrates a saw blade according to one embodiment of the invention. -
FIG. 2 is an enlarged view of a portion of the saw blade shown inFIG. 1 . -
FIG. 3 illustrates the saw blade ofFIG. 1 connected to a reciprocating saw and performing a footer cut. -
FIG. 4 illustrates the saw blade ofFIG. 1 connected to the reciprocating saw and performing a flush cut. -
FIG. 5 illustrates a saw blade according to another embodiment of the invention. - Before any embodiments of the invention are explained in detail, it is to be understood that the invention is not limited in its application to the details of construction and the arrangement of components set forth in the following description or illustrated in the following drawings. The invention is capable of other embodiments and of being practiced or of being carried out in various ways.
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FIG. 1 illustrates asaw blade 10 according to one embodiment of the invention. The illustratedsaw blade 10 is a reciprocating saw blade for use with a power tool such as, for example, a reciprocating saw 14 (FIGS. 3 and 4 ). Thesaw blade 10 includes abody 18, anattachment portion 22 for connecting theblade 10 to the reciprocatingsaw 14, and acutting portion 26 defining aplane 30. In the illustrated embodiment, thebody 18, theattachment portion 22, and thecutting portion 26 are integrally formed as a single piece such that thesaw blade 10 is a unitary structure. In other embodiments, thesaw blade 10 may be formed from several pieces that are welded or otherwise secured together. - The
body 18 includes anose portion 34, anextension portion 38, and amain body portion 42. Thebody 18 also includes aback edge 46 extending between theextension portion 38 and themain body portion 42. Thenose portion 34 is relatively narrow (i.e., short) compared to themain body portion 42 and extends from themain body portion 42. A leadingedge 50 of themain body portion 42 is oriented at an angle A1 relative to theback edge 46 to transition to thenose portion 34. The leadingedge 50 offsets thenose portion 34 from theback edge 46. In the illustrated embodiment, the angle A1 of the leadingedge 50 relative to theback edge 46 is approximately 45 degrees. In other embodiments, the angle A1 may be larger or smaller. - The
extension portion 38 is also relatively narrow compared to themain body portion 42 and supports theattachment portion 22. Theextension portion 38 extends from themain body portion 42 in a direction opposite thenose portion 34 such that theattachment portion 22 defines afirst end 54 of thebody 18 and thenose portion 34 defines asecond end 58 of thebody 18. Theback edge 46 is generally continuous and planar between theextension portion 38 and themain body portion 42. - The
main body portion 42 is taller than thenose portion 34 and theextension portion 38 and defines threeopenings second openings second openings main body portion 42 resembles a truss. Aweb 74 of themain body portion 42 extends between thefirst opening 62 and thesecond opening 66 to separate theopenings second openings body 18. Thethird opening 70 is formed as a cutout in a trailingedge 78 of themain body portion 42. The trailingedge 78 also defines athird end 82 of thebody 18. Theopenings body 18 to facilitate flexing thebody 18 while performing a flush cut (FIG. 4 ) with thesaw blade 10. - The illustrated
body 18 of thesaw blade 10 has an overall length L1 and an overall height H1. The overall length L1 is measured generally parallel to theplane 30 from thefirst end 54 of thebody 18 to thesecond end 58 of thebody 18. The overall height H1 is measured generally perpendicularly from theback edge 46 of thebody 18 to theplane 30. In some embodiments, the overall length L1 is between approximately 8 inches and approximately 12 inches, and the overall height H1 is between approximately 2 inches an approximately 2.5 inches. In such embodiments, a ratio of the overall height H1 to the overall length L1 is between approximately 0.17 and approximately 0.31. The relatively large overall height H1 of thebody 18 helps guide thesaw blade 10 along a surface while performing a flush cut (FIG. 4 ). In the illustrated embodiment, the overall length L1 is approximately 12 inches and the overall height H1 is approximately 2.1 inches such that the ratio of the overall height H1 to the overall length L1 is approximately 0.18. - The overall height H1 of the
saw blade 10 is maintained through approximately 60 percent of the overall length L1 of theblade 10. In the illustrated embodiment, a distance L2 from thefirst end 54 of thebody 18 to the point where thebody 18 begins to transition to the nose portion 34 (i.e., the start of the leading edge 50) is approximately 7.625 inches. At thenose portion 34, the height of thesaw blade 10 is reduced to that of a conventional reciprocating saw blade. In other embodiments, the distance L2 from thefirst end 54 of thebody 18 to the leadingedge 50 may be relatively longer or shorter. - The illustrated
extension portion 38 has a height H2 measured generally perpendicular to theback edge 46 of thebody 18. The height H2 of theextension portion 38 is significantly less than the overall height H1 of thesaw blade 10. In some embodiments, a ratio of the overall height H1 to the extension portion height H2 is between approximately 2.7 and approximately 3.3. In the illustrated embodiment, the extension portion height H2 is approximately 0.75 inches and the ratio is approximately 2.8. In other embodiments, the extension portion height H2 may be relatively larger or smaller. - The
attachment portion 22 extends from thebody 18 and includes atang 86 and anaperture 90. Thetang 86 and theaperture 90 are configured to engage a blade clamp of a reciprocating saw to securely and releasably connect theblade 10 to the saw. In the illustrated embodiment, theattachment portion 22 extends from thebody 18 at a zero degree tang angle (i.e., theattachment portion 22 extends generally parallel to the plane 30). In other embodiments, theattachment portion 22 may extend from thebody 18 at an oblique angle such that thesaw blade 10 reciprocates at an angle relative to a reciprocating saw. - The
attachment portion 22 has a height H3 measured generally perpendicular to theplane 30. Similar to theextension portion 38, the height H3 of theattachment portion 22 is significantly less than the overall height H1 of thebody 18. In some embodiments, a ratio of the overall height H1 to the attachment portion height H3 is between approximately 4 and approximately 5. In the illustrated embodiment, the height H3 of theattachment portion 22 is approximately 0.5 inches and the ratio of the overall height H1 to the attachment portion height H3 is approximately 4.2. In other embodiments, the attachment portion height H3 may be relatively larger or smaller. - The
attachment portion 22 is offset from theplane 30 and from thethird end 82 of thebody 18 to facilitate performing a footer cut (FIG. 3 ) with thesaw blade 10. In particular, theattachment portion 22 is spaced a first offset distance H4, measured generally perpendicular to theplane 30, from theplane 30. Theattachment portion 22 is also spaced a second offset distance L3, measured generally parallel to theplane 30, from thethird end 82 of thebody 18. The first and second offset distances H4, L3 provide clearance between theattachment portion 22 and the cuttingportion 26 to reduce interference from a connected reciprocating saw while performing cuts in constricted areas. In some embodiments, a ratio of the first offset distance H4 to the overall height H1 of thesaw blade 10 is between approximately 0.6 and approximately 0.8, and a ratio of the second offset distance L3 to the overall length L1 of thesaw blade 10 is between approximately 0.2 and approximately 0.4. In the illustrated embodiment, the first offset distance H4 is approximately 1.5 inches and the second offset distance L3 is approximately 2.8 inches. In other embodiments, the first and second offset H4, L3 distances may be larger or smaller. - The cutting
portion 26 extends from thesecond end 58 of thebody 18 to thethird end 82 of thebody 18. The cuttingportion 26 includes a plurality of cuttingteeth 94 and atip portion 98. The cuttingteeth 94 are generally similarly shaped and sized to define a tooth form along thebody 18. The cuttingteeth 94 are separated by a plurality ofgullets 102. As shown inFIG. 2 , each cuttingtooth 94 includes a tip 106, a rake face 110, and a relief face 114. The tips 106 of the cuttingteeth 94 define theplane 30 of the cuttingportion 26. Each cuttingtooth 94 has a height H5 measured generally perpendicular to theplane 30 from a base 118 of acorresponding gullet 102 to theplane 30. In the illustrated embodiment, the height H5 of eachtooth 94 is approximately 0.1 inches. In other embodiments, the height H5 of theteeth 94 may be relatively larger or smaller or may vary along the cuttingportion 26. - Referring back to
FIG. 1 , thetip portion 98 is formed on thenose portion 34 of thebody 18 at thesecond end 58. The illustratedtip portion 98 is a plunge point including an enlargedfirst gullet 122 for initiating a plunge cut with thesaw blade 10. In other embodiments, the cuttingportion 26 may include different tip configurations for initiating a plunge cut. In still other embodiments, thetip portion 98 may simply define an end of the tooth form and may not be specifically configured for performing a plunge cut. - The illustrated
cutting portion 26 also includes twofloor guard teeth body 18. In other embodiments, the cuttingportion 26 may include fewer or more floor guard teeth, or the floor guard teeth may be omitted. The firstfloor guard tooth 126 is positioned toward thesecond end 58 of thebody 18 between two cuttingteeth 94. The illustrated firstfloor guard tooth 126 is spaced apart from thesecond end 58 such that the firstfloor guard tooth 126 does not interfere with plunge cuts. The secondfloor guard tooth 130 is positioned at thethird end 82 of thebody 18 adjacent asingle cutting tooth 94. The first and secondfloor guard teeth floor guard tooth 126 is positioned far enough away from the secondfloor guard tooth 130 such that theteeth saw blade 10 is reciprocated. For example, in some embodiments, thefloor guard teeth floor guard tooth 126 is spaced approximately 7.25 inches apart from the secondfloor guard tooth 130. In other embodiments, thefloor guard teeth - The illustrated
floor guard teeth teeth 94 by one of thegullets 102. In other embodiments, thefloor guard teeth teeth 94 such that a larger gullet or dead space is present between thefloor guard teeth teeth 94. Eachfloor guard tooth flat contact surface plane 30. The contact surfaces 134, 138 of thefloor guard teeth FIG. 3 ) with thesaw blade 10 to inhibit the cuttingteeth 94 from contacting the floor surface. - Each
floor guard tooth tooth 94. In the illustrated embodiment, thefloor guard teeth tooth 94. In particular, a length L4 of the illustrated first floor guard tooth 126 (FIG. 2 ) is approximately equal to the length of twoadjacent cutting teeth 94, including thegullet 102 positioned therebetween. A length of the illustrated secondfloor guard tooth 130 is approximately equal to the length of twoadjacent cutting teeth 94, but without a gullet positioned therebetween. In other embodiments, thefloor guard teeth - As shown in
FIG. 2 , thefloor guard teeth teeth 94 such that thefloor guard teeth body 18 beyond theplane 30. The first floor guard tooth has a height H6 measured generally perpendicular to theplane 30 from the base 118 of acorresponding gullet 102 to thecontact surface 134. In some embodiments, a ratio of the floor guard tooth height H6 to the cutting tooth height H5 is approximately 1.1. In the illustrated embodiment, the floor guard tooth height H6 is approximately 0.11 inches such that the firstfloor guard tooth 126 extends approximately 0.01 inches beyond theplane 30. Although only the firstfloor guard tooth 126 is shown inFIG. 2 , the secondfloor guard tooth 130 has approximately the same height as the firstfloor guard tooth 126 and extends beyond theplane 30 approximately the same distance. In other embodiments, the first and secondfloor guard teeth - In some embodiments, the cutting
teeth 94 are set relative to thebody 18 of thesaw blade 10. In the illustrated embodiment, the cuttingteeth 94 between thesecond end 58 of thebody 18 and the firstfloor guard tooth 126 are unset. Leaving theseteeth 94 unset facilitates making straight and smooth cuts with thesaw blade 10 along the side of, for example, a window framing board. Theunset teeth 94 allow the nose portion 32 of thesaw blade 10 to lay flush against a framing board to minimize damage to the board while cutting. At least some of the cuttingteeth 94 between the first and secondfloor guard teeth teeth 94 between thefloor guard teeth portion 26. In the illustrated embodiment, all of the cuttingteeth 94 immediately adjacent the first and secondfloor guard teeth teeth 94 may be set in other patterns along the tooth form. -
FIG. 3 illustrates thesaw blade 10 performing a footer cut. During a footer cut, thesaw blade 10 is used to cut aboard 142, or other piece of material, that is directly adjacent afloor surface 146. Theattachment portion 22 is inserted into the reciprocating saw 14 to connect thesaw blade 10 to thesaw 14. Since theattachment portion 22 is offset vertically and horizontally from the cuttingportion 26 as described above, the reciprocating saw 14 is likewise offset from the cuttingportion 26. The offset reduces, or even eliminates, interference of the reciprocating saw 14 with thefloor surface 146 as thesaw blade 10 cuts through theboard 142. - In addition, as the
saw blade 10 completes the cut through theboard 142, the cuttingteeth 94 would normally contact the floor surface 146 (which may be made of, for example, concrete), possibly breaking, dulling, or otherwise damaging theteeth 94. Since thefloor guard teeth body 18 than the cuttingteeth 94, thefloor guard teeth floor surface 146 and inhibit the cuttingteeth 94 from contacting thefloor surface 146. Thefloor guard teeth teeth 94 from contacting and cutting into the soft surfaces. Providing at least two spaced apartfloor guard teeth saw blade 10 and thefloor surface 146 to reduce the possibility of thesaw blade 10 tilting relative to thefloor surface 146 while performing the cut. In addition, providing theattachment portion 22 at the zero degree tang angle makes thesaw blade 10 come down generally perpendicular to thefloor surface 146 such that bothfloor guard teeth surface 146 at the same time. -
FIG. 4 illustrates thesaw blade 10 performing a flush cut. During a flush cut, thesaw blade 10 is used to cut a board orwork piece 150 that is directly adjacent a relatively flat surface, such as afloor surface 154. Such cuts are typically difficult to perform so close to thefloor surface 154 because the relatively wide reciprocating saw 14 contacts thefloor surface 154 and prevents a conventional saw blade from cutting directly against thesurface 154. Theopenings blade 10 facilitate performing the flush cut by reducing the stiffness of thesaw blade 10 along its length. In particular, theopenings body 18 of thesaw blade 10. In addition, the relatively large overall height H1 of thesaw blade 10 increases tracking of theblade 10 along thefloor surface 154 to facilitate cutting in a straight line. The large overall height H1 also reduces the possibility of thesaw blade 10 “walking” into and damaging a framing board when performing a flush cut along the framing board. -
FIG. 5 illustrates asaw blade 210 according to another embodiment of the invention. The illustrated sawblade 210 is similar to thesaw blade 10 discussed above. Differences between thesaw blades - The
saw blade 210 is a reciprocating saw blade and includes abody 214, anattachment portion 218, and a cuttingportion 222. Thebody 214 includes a relativelyshort nose portion 226 compared to thenose portion 34 of thesaw blade 10 shown inFIG. 1 . The overall height of the illustrated sawblade 210 is thereby maintained through a larger percentage of its overall length. - The
body 214 also defines threeopenings saw blade 210. In the illustrated embodiment, thefirst opening 230 is considerably larger than thesecond opening 234. In addition, thefirst opening 230 is bounded on four sides such that thefirst opening 230 is a quadrilateral, while thesecond opening 234 is bounded on three sides such that thesecond opening 234 is a triangle. Similar to thethird opening 70 discussed above, the illustratedthird opening 238 is formed as a cutout in a trailingedge 242 of the body. - The cutting
portion 222 includes a plurality of cuttingteeth 246 and twofloor guard teeth floor guard tooth 250 is spaced from asecond end 258 of thebody 214 and positioned between two cuttingteeth 246. The secondfloor guard tooth 254 is spaced from athird end 262 of thebody 214 and also positioned between two cuttingteeth 246. Thefloor guard teeth body 214 further than the cuttingteeth 246 to inhibit the cuttingteeth 246 from contacting a floor surface while performing a footer cut. - Although the invention has been described in detail with reference to certain preferred embodiments, variations and modifications exist within the scope and spirit of one or more independent aspects of the invention. Various features and advantages of the invention are set forth in the following claims.
Claims (35)
1. A saw blade for use with a reciprocating saw, the saw blade comprising:
a body;
an attachment portion extending from the body, the attachment portion including a tang and an aperture configured to connect to the reciprocating saw; and
a cutting portion formed on the body, the cutting portion including a plurality of cutting teeth and a floor guard tooth positioned adjacent at least one of the plurality of cutting teeth, each cutting tooth having a tip that defines a plane, the floor guard tooth extending from the body beyond the plane;
wherein the attachment portion is offset from the plane to reduce interference of the reciprocating saw with a surface while performing a footer cut with the saw blade, and wherein the floor guard tooth contacts the surface while performing the footer cut to inhibit the plurality of cutting teeth from contacting the surface.
2. The saw blade of claim 1 , wherein the floor guard tooth is at least twice as long as each cutting tooth.
3. The saw blade of claim 1 , wherein the floor guard tooth has a relatively flat surface that is generally parallel to the plane.
4. The saw blade of claim 1 , wherein each cutting tooth and the floor guard tooth are separated by a gullet, wherein each cutting tooth has a first height measured generally perpendicular to the plane from a base of a corresponding gullet, wherein the floor guard tooth has a second height measured generally perpendicular to the plane from a base of a corresponding gullet, and wherein a ratio of the second height to the first height is approximately 1.1.
5. The saw blade of claim 1 , wherein the floor guard tooth extends approximately 0.01 inches beyond the plane.
6. The saw blade of claim 1 , wherein the attachment portion extends from the body generally parallel to the plane at a zero degree tang angle.
7. The saw blade of claim 1 , wherein the floor guard tooth is a first floor guard tooth, wherein the cutting portion includes a second floor guard tooth spaced apart from the first floor guard tooth and positioned adjacent at least one of the plurality of cutting teeth, and wherein the second floor guard tooth extends from the body beyond the plane to contact the surface while performing the footer cut.
8. The saw blade of claim 7 , wherein the first floor guard tooth is positioned between two cutting teeth and the second floor guard tooth is positioned at an end of the cutting portion adjacent a single cutting tooth.
9. The saw blade of claim 7 , wherein the first floor guard tooth is spaced at least 6.5 inches from the second floor guard tooth.
10. The saw blade of claim 9 , wherein the first floor guard tooth is spaced approximately 7.25 inches from the second floor guard tooth.
11. The saw blade of claim 1 , wherein the body has a back edge opposite the cutting portion and a height measured generally perpendicularly from the back edge to the plane, wherein the attachment portion is spaced an offset distance from the plane, and wherein a ratio of the offset distance to the height is between approximately 0.6 and approximately 0.8.
12. The saw blade of claim 1 , wherein the attachment portion is offset approximately 1.5 inches from the plane.
13. The saw blade of claim 1 , further comprising a tip portion formed on the body opposite the attachment portion, wherein a first group of cutting teeth is positioned between the floor guard tooth and the tip portion, and wherein all of the first group of cutting teeth are unset.
14. The saw blade of claim 13 , wherein the floor guard tooth is positioned between the tip portion and a second group of cutting teeth, and wherein at least some of the second group of cutting teeth are set.
15. A saw blade for use with a reciprocating saw, the saw blade comprising:
a body having a back edge and defining an opening;
an attachment portion extending from the body, the attachment portion including a tang and an aperture configured to connect to the reciprocating saw; and
a cutting portion formed on the body opposite the back edge, the cutting portion including a plurality of cutting teeth, each cutting tooth having a tip that defines a plane;
wherein the body has a first height measured generally perpendicularly from the back edge to the plane, wherein the attachment portion has a second height measured generally perpendicular to the plane, and wherein a ratio of the first height to the second height is between approximately 4 and approximately 5; and
wherein the opening facilitates flexing the body while performing a flush cut with the saw blade.
16. The saw blade of claim 15 , wherein the ratio of the first height to the second height is approximately 4.2.
17. The saw blade of claim 15 , wherein the first height of the body is at least 2 inches.
18. The saw blade of claim 17 , wherein the first height of the body is approximately 2.1 inches.
19. The saw blade of claim 15 , wherein the opening is completely bounded by the body.
20. The saw blade of claim 15 , wherein the opening is a first opening, wherein the body defines a second opening spaced apart from the first opening, and wherein the second opening further facilitates flexing the body while performing the flush cut.
21. The saw blade of claim 15 , wherein the attachment portion defines a first end of the body, and further comprising a tip portion formed at a second end of the body opposite the attachment portion, wherein the cutting portion extends from the tip portion to a third end of the body; and
wherein the body has a length measured generally parallel to the plane from the first end to the second end, wherein the third end of the body is spaced from the first end of the body such that the attachment portion is offset from the cutting portion by an offset distance measured generally parallel to the plane, and wherein a ratio of the offset distance to the length is between approximately 0.2 and approximately 0.4.
22. The saw blade of claim 21 , wherein the offset distance is approximately 2.8 inches.
23. The saw blade of claim 15 , wherein the attachment portion defines a first end of the body, and further comprising a tip portion formed at a second end of the body opposite the attachment portion; and
wherein the body has length measured generally parallel to the plane from the first end to the second end, and wherein a ratio of the first height to the length is between approximately 0.17 and approximately 0.31.
24. The saw blade of claim 23 , wherein the ratio of the first height to the length is approximately 0.18.
25. A saw blade for use with a reciprocating saw, the saw blade comprising:
a body having a back edge and defining an opening;
an attachment portion extending from the body, the attachment portion including a tang and an aperture configured to connect to the reciprocating saw; and
a cutting portion formed on the body opposite the back edge, the cutting portion including a plurality of cutting teeth, a first floor guard tooth positioned adjacent at least one of the plurality of cutting teeth, and a second floor guard tooth spaced apart from the first floor guard tooth and positioned adjacent at least one of the plurality of cutting teeth, each cutting tooth having a tip that defines a plane, the first floor guard tooth and the second floor guard tooth extending from the body beyond the plane;
wherein the body has a first height measured generally perpendicularly from the back edge to the plane, wherein the attachment portion has a second height measured generally perpendicular to the plane, and wherein a ratio of the first height to the second height is between approximately 4 and approximately 5;
wherein the opening facilitates flexing the body while performing a flush cut with the saw blade; and
wherein the attachment portion is offset from the plane to reduce interference of the reciprocating saw with a surface while performing a footer cut with the saw blade, and wherein the first floor guard tooth and the second floor guard tooth contact the surface while performing the footer cut to inhibit the plurality of cutting teeth from contacting the surface.
26. The saw blade of claim 25 , wherein the first floor guard tooth and the second floor guard tooth are each approximately twice as long as each cutting tooth, and wherein each floor guard tooth has a relatively flat surface that is generally parallel to the plane.
27. The saw blade of claim 25 , wherein each cutting tooth, the first floor guard tooth, and the second floor guard tooth are separated by a gullet, wherein each cutting tooth has a third height measured generally perpendicular to the plane from a base of a corresponding gullet, wherein each of the first floor guard tooth and the second floor guard tooth has a fourth height measured generally perpendicular to the plane from a base of a corresponding gullet, and wherein a ratio of the fourth height to the third height is approximately 1.1.
28. The saw blade of claim 25 , wherein the first floor guard tooth and the second floor guard tooth both extend approximately 0.01 inches beyond the plane.
29. The saw blade of claim 25 , wherein the attachment portion extends from the body generally parallel to the plane at a zero degree tang angle.
30. The saw blade of claim 25 , wherein the first height of the body is at least 2 inches.
31. The saw blade of claim 25 , wherein the attachment portion is spaced an offset distance from the plane, and wherein a ratio of the offset distance to the first height is between approximately 0.6 and approximately 0.8.
32. The saw blade of claim 25 , wherein the attachment portion is offset approximately 1.5 inches from the plane.
33. The saw blade of claim 25 , wherein the attachment portion defines a first end of the body, and further comprising a tip portion formed at a second end of the body opposite the attachment portion, wherein the cutting portion extends from the tip portion to a third end of the body; and
wherein the body has a length measured generally parallel to the plane from the first end and the second end, wherein the third end of the body is spaced from the first end of the body such that the attachment portion is offset from the cutting portion by an offset distance measured generally parallel to the plane, and wherein a ratio of the offset distance to the length is between approximately 0.2 and approximately 0.4.
34. The saw blade of claim 25 , wherein the attachment portion extends from a first end of the body, and further comprising a tip portion formed at a second end of the body opposite the attachment portion; and
wherein the body has a length measured generally parallel to the plane from the first end to the second end, and wherein a ratio of the first height to the length is between approximately 0.17 and approximately 0.31.
35. The saw blade of claim 25 , wherein the first floor guard tooth is spaced approximately 7.25 inches from the second floor guard tooth.
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Also Published As
Publication number | Publication date |
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US9827626B2 (en) | 2017-11-28 |
USD936437S1 (en) | 2021-11-23 |
CA2749666A1 (en) | 2012-02-20 |
US20180071847A1 (en) | 2018-03-15 |
US10722961B2 (en) | 2020-07-28 |
US20150231713A1 (en) | 2015-08-20 |
CA2749666C (en) | 2014-07-15 |
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Legal Events
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