US20130111766A1 - Reciprocating saw blade for cutting drywall - Google Patents
Reciprocating saw blade for cutting drywall Download PDFInfo
- Publication number
- US20130111766A1 US20130111766A1 US13/732,207 US201213732207A US2013111766A1 US 20130111766 A1 US20130111766 A1 US 20130111766A1 US 201213732207 A US201213732207 A US 201213732207A US 2013111766 A1 US2013111766 A1 US 2013111766A1
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- United States
- Prior art keywords
- blade
- drywall
- edge
- body edge
- length
- 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
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
- B27B33/00—Sawing tools for saw mills, sawing machines, or sawing devices
- B27B33/02—Structural design of saw blades or saw teeth
-
- 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
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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
-
- 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
- Y10T83/935—Plural tooth groups
-
- 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
- Y10T83/9454—Reciprocable type
Definitions
- the present invention relates generally to saw blades and more particularly, to a saw blade for use with a reciprocating saw for cutting drywall.
- Drywall is widely used in the construction industry for both residential and commercial construction. Sheets of drywall may be pre-fabricated at an off-site location and delivered to the construction site. The drywall sheets may be quickly and easily attached to the structural frame to form a wall, ceiling, or other surface.
- drywall After the drywall is attached to the structural frame, it may be necessary to cut the drywall. For instance, an electrician may cut through the drywall to install recessed lighting in a ceiling. In addition, a plumber may cut through the drywall to access plumbing located behind the drywall. Various demolition projects may also require cutting or removal of certain sections of drywall.
- a typical drywall cutter includes a blade that is 4′′-9′′ in length.
- a common problem associated with usage of such drywall cutting tools is that when the blade is inserted into the drywall, the blade may cut or damage utilities located behind the drywall. For instance, the blade may cut or damage electrical lines, plumbing, or other utilities disposed behind the drywall. Contact between the blade and the utilities may also place the individual cutting the drywall at risk of injury (e.g. electrical lines, gas lines). In addition, such contact may also create considerable damage, which may be very costly to fix. In the case of a hired contractor, the cost of repair may be greater than the profit expected for the original project.
- a standard sheet of drywall includes an inner chalky layer disposed between a pair of opposing outer paper-like layers.
- the blade travels through the inner chalky layer, it has a propensity to pull chunks of the inner chalky layer out of the drywall sheet, which causes dust to settle in the areas surrounding the drywall.
- the dusted areas typically require cleaning once the drywall is cut. The cleanup adds unwanted time and expense to the construction project.
- a replaceable drywall saw blade capable of reciprocating in-line when mounted to a hand held reciprocating power saw.
- the blade includes a generally planar body member having a generally linear top edge and a generally parallel opposed bottom edge.
- the blade further includes a generally linear upper piercing edge angularly offset downwardly from the top edge.
- the blade additionally includes a generally linear lower piercing edge angularly offset upwardly from the bottom edge.
- the upper piercing edge and lower piercing edge intersect to form a forward point on said blade.
- the blade also includes a mounting aperture connected to the body member for releasably securing the blade to the hand held reciprocating power saw.
- the blade may be sized and configured to mitigate contact between the blade and utilities which may be disposed behind the drywall. In this manner, the blade may be configured to be inserted into the drywall, with a minimal amount of the blade being completely advanced therethrough. In addition, the blade may minimize the amount of dust generated during insertion and removal of the blade into and out of the drywall. In this regard, the at least one tooth may be configured to cut through an outer layer of the drywall to mitigate the amount of dust produced when cutting the drywall.
- the blade may include at least one saw tooth is formed in the bottom edge.
- the blade may further include an upper piercing edge and a lower piercing edge that intersect at a right angle.
- the blade may include a plurality of saw teeth.
- the thickness of the blade may be substantially uniform along its length.
- FIG. 1 is an upper perspective view of a blade for use with a reciprocating saw to cut drywall, the blade having a blade body, a blade tip, a pair of teeth, and an engagement element;
- FIG. 2 is a side elevation view of the blade illustrated in FIG. 1 ;
- FIG. 3 is a side elevation view of the blade connected to a reciprocating saw to define a saw-blade assembly, with the blade positioned for insertion into a section of drywall, the drywall having a first outer layer and an opposing second outer layer with an inner layer disposed therebetween;
- FIG. 4 is a side elevation view of the saw-blade assembly illustrated in FIG. 3 , with the blade advanced into the drywall;
- FIG. 5 is a side elevation view of the saw-blade assembly illustrated in FIG. 4 , with the blade removed from the drywall.
- FIGS. 1-6 illustrate a drywall cutting blade 10 constructed in accordance with an embodiment of the present invention.
- Various aspects of the invention are directed toward a blade 10 configured to reduce the amount of dust produced when cutting the drywall 40 .
- other aspects of the invention are directed toward mitigating contact between the blade 10 and utilities which may be disposed behind the drywall 40 , such as plumbing and electrical lines.
- the blade 10 is configured for use with a reciprocating saw 12 for cutting drywall 40 .
- a reciprocating saw 12 is a tool that is engageable with a cutting instrument (such as a blade 10 ) to drive the cutting instrument through a cutting cycle. In most cases, the reciprocating saw repeatedly pushes and pulls the blade 10 through a cutting material. It is understood that reciprocating saws 12 are commonly employed in construction and demolition projects. The size and shape of the reciprocating saw 12 may vary. Reciprocating saw 12 are readily available in handheld and cordless models, as well as high-speed, high-power corded models.
- An exemplary reciprocating saw 12 is the DeWalt Heavy-Duty 10.0 Amp Reciprocating Saw manufactured by DeWalt, headquartered in Baltimore, Maryland.
- the blade 10 includes a blade body member 14 defining a body leading portion 24 and a body engagement portion 26 .
- the body engagement portion 26 refers to that portion of the blade body 14 that is disposed closest to the reciprocating saw 12 when the blade 10 is connected thereto.
- the leading portion 24 refers to that portion of the blade body 14 that is farthest from the saw 12 when the blade 10 is connected thereto.
- the body leading portion 24 is also that portion of the body member 14 that is initially inserted into the drywall 40 .
- the blade body 14 includes a body top edge 18 and an opposing body bottom edge 16 .
- the body top and bottom edges 18 , 16 extend along the blade body 14 between the blade engagement portion 26 and the blade leading portion 24 . It may be desirable for the body top and bottom edges 18 , 16 to be substantially planar to facilitate insertion and removal of the blade 10 from the drywall 40 .
- the top and bottom edges 18 , 16 are substantially parallel (as shown in FIGS. 1 and 2 ). However, it is understood that the body top and bottom edges 18 , 16 may also define a non-parallel configuration.
- insertion and removal of blade 10 into and out of the drywall 40 may further be facilitated by smooth, planar body top and bottom edges 18 , 26 .
- the blade 10 further includes a pair of opposing lateral surfaces 20 extending along the length of the blade 10 .
- the lateral surfaces 20 extend between the body top edge 18 and the body bottom edge 16 .
- the distance between the opposing lateral surfaces 20 defines a blade thickness “T.”
- the blade thickness T is substantially uniform.
- the blade thickness T is approximately 0.05 inches.
- the thickness T may vary without departing from the spirit and scope of the present invention.
- the blade 10 is configured to cut drywall 40 through repeated insertion and removal of the blade 10 through the drywall 40 , it is desirable to form the blade body 14 out of a strong, durable material.
- the blade body 14 is formed of steel. However, other materials known by those skilled in the art may also be used.
- the blade 10 includes a blade tip 28 for piercing through the drywall 40 upon insertion of the blade 10 into the drywall 40 .
- the blade tip 28 is connected to the body leading portion 24 .
- the blade tip 28 is integrally formed with the blade body 14 .
- the blade tip 28 includes an upper piercing edge 30 connected to the body top edge 18 to define an upper tip angle a therebetween.
- the blade tip 28 further includes a lower piercing edge 32 connected to the body bottom edge 16 to define a lower tip angle ⁇ therebetween.
- the upper piercing edge 30 and the lower piercing edge 32 intersect at a forward point 29 to define a primary tip angle ⁇ .
- the primary tip angle is 90 degrees.
- the upper piercing edge 30 is substantially orthogonal to the lower piercing edge 32 . Accordingly, the upper and lower tip angles ⁇ , ⁇ are obtuse in nature. In this regard, the upper and lower tip angles ⁇ , ⁇ are greater than 90 degrees but less than 180 degrees.
- the upper piercing edge 30 defines an upper piercing length “U,” defined as the distance between the forward point 29 and the intersection between the upper piercing edge 30 and the body top edge 18 .
- the lower piercing edge 32 defines a lower piercing length “P,” defined as the distance between the forward point 29 and the intersection between the lower piercing edge 32 and the body bottom edge 16 .
- the upper piercing length U and the lower piercing length P may vary. For instance, in one embodiment, the upper piercing length U is greater than the lower piercing length P. However, in another embodiment, the upper piercing length U is less than the lower piercing length P. Furthermore, in an additional embodiment, the upper piercing length U and the lower piercing length P are substantially identical.
- the blade tip 28 may be formed of strong durable material capable of penetrating through the drywall 40 .
- at least a portion of the blade tip 28 is formed of a carbide material (e.g. tungsten carbide, titanium carbide). Carbide may be desirable because of its tendency to remain sharp after repeated use.
- the blade tip 28 may be formed of steel or other materials known by those skilled in the art. In this manner, the blade tip 28 may be formed of the same or different material used to form the blade body 14 .
- the blade 10 also includes one or more teeth 34 for cutting a portion of the drywall 40 .
- the teeth 34 are connected to the engagement portion 26 of the blade body member 14 .
- the blade 10 includes a pair of teeth 34 connected to the engagement portion 26 at the body bottom edge 16 .
- the size, shape, and number of teeth 34 may vary. For instance, when cutting thicker pieces of drywall 40 , larger teeth 34 may be desirable.
- bottom edge 16 defines a non-serrated first segment S 1 and teeth 34 define a serrated second segment S 2 . The interaction between the teeth 34 and the drywall 40 will be described in more detail below.
- the distance between the forward point 29 and the most rearward tooth 34 defines an operative blade length “L,” as depicted in FIG. 2 .
- the operative blade length L extends from the forward point 29 to a proximal end 35 .
- utilities including but not limited to, electrical wiring and plumbing may be disposed behind a sheet of drywall 40 .
- the blade 10 When the blade 10 is advanced through the drywall 40 for purposes of cutting the drywall 40 , there is a risk of contacting the utilities. Contact between the blade 10 and the utilities may damage the utilities as well as create a safety hazard. For instance, if the blade 10 contacts a live electrical wire, the user may be electrocuted.
- a blade 10 punctures a plumbing line, the surrounding areas may become flooded. Consequently, considerable time and money may be expended to repair damage caused by inadvertent contact between the blade 10 and the utilities. Therefore, by minimizing the operative blade length L, contact between the blade 10 and utilities disposed behind the drywall 40 may be mitigated.
- various embodiments of the present invention include a blade length L that is considerably less than conventional saw blades. In this manner, it is less likely that the blade 10 will contact utilities disposed behind the drywall 40 . It is also understood that the blade length L may vary according to the thickness of the drywall 40 . For instance, for thicker pieces of drywall 40 , a larger blade length L may be desired.
- the blade 10 additionally includes an engagement element 36 connected to the engagement portion 26 of the blade body member 14 .
- the engagement element 36 is sized and configured to be engageable with the reciprocating saw 12 .
- Many conventional reciprocating saws 12 engage with a blade 10 by way of a through-hole formed in the blade 10 .
- the embodiment illustrated in FIGS. 1 and 2 includes a mounting aperture 38 for engagement with a reciprocating saw 12 .
- the mounting aperture 38 extends between the opposing lateral surfaces 20 of the blade 10 . It is understood that the engagement element 36 may take on other configurations without departing from the spirit and scope of the present invention.
- FIG. 3 depicts a blade-saw assembly 50 including a blade 10 connected to a reciprocating saw 12 having a saw guard 55 .
- the blade-saw assembly 50 is positioned to cut the drywall 40 .
- the blade 10 is positioned to enter the drywall 40 through the first outer layer 42 .
- the blade 10 is inserted into the drywall 40 along an insertion axis 52 .
- the insertion axis 52 is substantially orthogonal to a drywall axis 54 defined by the first outer layer 42 . In this manner, the blade-saw assembly 50 is held substantially orthogonal to the plane of the drywall 40 when cutting the drywall 40 .
- the saw 12 is pressed toward the drywall 40 to cause the saw guard 55 to be disposed adjacent the first outer layer 42 .
- the blade 10 is advanced through the drywall 40 to cause the blade tip 28 to pass through the first outer layer 42 and the drywall inner layer 46 .
- the blade tip 28 also comes in contact with the second outer layer 44 .
- the blade tip 28 may be configured to completely pass through the second outer layer 44 . This may be desirable to make a cleaner and more efficient cut of the drywall 40 .
- the blade tip 28 may not pass completely through the second outer layer 44 . It may be desirable to mitigate complete blade tip 28 penetration through the second outer layer 44 to protect against inadvertent contact with utilities. For instance, if a user knows, or has good reason to believe that utilities are disposed adjacent the second outer layer 44 , then full penetration of the second outer layer 44 by the blade tip 28 may be undesirable.
- the blade 10 retracts through the drywall 40 .
- the teeth 34 may cut through the first outer layer 42 to facilitate removal of the blade 10 from the drywall 40 .
- the cutting of the first outer layer 42 by the teeth 34 mitigates bunching of the first outer layer 42 .
- the first outer layer 42 has a tendency to gather and disrupt cutting of the drywall 40 .
- the smooth and planar body upper and lower edges 18 , 16 enable the blade 10 to glide through the drywall inner layer 46 , which mitigates the amount of dust generated by cutting the drywall 40 .
- the blade 10 does not include blade teeth 34 .
- the blade 10 may include blade teeth 34 that are not advanced into the drywall 34 . In this manner, the blade 10 does not have to be inserted to a point where the teeth 34 at least pass through the first outer layer 42 . Rather, the blade 10 may be inserted until the blade tip 28 contacts the second outer layer 44 . Once the blade tip 28 achieves penetration through the second outer layer 44 , further insertion is not required. This may be desirable when it is known that utilities are disposed in close proximity to the second outer layer 44 . By minimizing the penetration depth, the chance of puncture or other damage to the utilities is reduced.
- Another benefit to the blade 10 not having teeth 34 is that the blade 10 may cut the drywall 40 in two directions. More specifically, the blade 10 may cut the drywall 40 along the body upper edge 18 , or alternatively along the body lower edge 16 .
- the user presses the saw 12 against the drywall 40 to keep the saw guard 55 adjacent the first outer layer 42 .
- the user may also direct the saw 12 to in a direction to perform the desired cut. In this manner, the blade 10 reciprocates through the drywall 40 to make the cut. Once the user completes the desired cut, the blade 10 is removed from the drywall 40 , as illustrated in FIG. 5 .
Abstract
There is provided a replaceable drywall saw blade capable of reciprocating in-line when mounted to a hand held reciprocating power saw. The blade includes a generally planar body member having a generally linear top edge and a generally parallel opposed bottom edge. The blade further includes a generally linear upper piercing edge angularly offset downwardly from the top edge. The blade additionally includes a generally linear lower piercing edge angularly offset upwardly from the bottom edge. The upper piercing edge and lower piercing edge intersect to form a forward point on said blade. A mounting aperture is also formed on the blade for releasably securing the blade to the hand held reciprocating power saw.
Description
- The present application is a continuation of U.S. patent application Ser. No. 12/174,777 filed Jul. 17, 2008, currently pending, which claims priority to Provisional Application No. 60/965,673 filed on Aug. 21, 2007 entitled Reciprocating Saw Blade, the entire contents of such provisional application is incorporated herein by reference.
- (Not Applicable)
- 1. Field of the Invention
- The present invention relates generally to saw blades and more particularly, to a saw blade for use with a reciprocating saw for cutting drywall.
- 2. Description of the Related Art
- Drywall is widely used in the construction industry for both residential and commercial construction. Sheets of drywall may be pre-fabricated at an off-site location and delivered to the construction site. The drywall sheets may be quickly and easily attached to the structural frame to form a wall, ceiling, or other surface.
- After the drywall is attached to the structural frame, it may be necessary to cut the drywall. For instance, an electrician may cut through the drywall to install recessed lighting in a ceiling. In addition, a plumber may cut through the drywall to access plumbing located behind the drywall. Various demolition projects may also require cutting or removal of certain sections of drywall.
- Conventional drywall cutting tools may be used to cut through the drywall. A typical drywall cutter includes a blade that is 4″-9″ in length. A common problem associated with usage of such drywall cutting tools is that when the blade is inserted into the drywall, the blade may cut or damage utilities located behind the drywall. For instance, the blade may cut or damage electrical lines, plumbing, or other utilities disposed behind the drywall. Contact between the blade and the utilities may also place the individual cutting the drywall at risk of injury (e.g. electrical lines, gas lines). In addition, such contact may also create considerable damage, which may be very costly to fix. In the case of a hired contractor, the cost of repair may be greater than the profit expected for the original project.
- Another problem associated with conventional drywall cutters relates to the dust generated when cutting the drywall. In particular, conventional drywall cutters tend to generate significant amounts of dust or debris when cutting the drywall. A standard sheet of drywall includes an inner chalky layer disposed between a pair of opposing outer paper-like layers. When the blade travels through the inner chalky layer, it has a propensity to pull chunks of the inner chalky layer out of the drywall sheet, which causes dust to settle in the areas surrounding the drywall. As such, the dusted areas typically require cleaning once the drywall is cut. The cleanup adds unwanted time and expense to the construction project.
- As is apparent from the foregoing, there exists a need in the art for a drywall cutting blade configured to mitigate contact with utilities disposed behind the drywall as well as to reduce the dust generated with cutting the drywall. The present invention addresses this particular need, as will be discussed in more detail below.
- According to an aspect of the present invention, there is provided a replaceable drywall saw blade capable of reciprocating in-line when mounted to a hand held reciprocating power saw. The blade includes a generally planar body member having a generally linear top edge and a generally parallel opposed bottom edge. The blade further includes a generally linear upper piercing edge angularly offset downwardly from the top edge. The blade additionally includes a generally linear lower piercing edge angularly offset upwardly from the bottom edge. The upper piercing edge and lower piercing edge intersect to form a forward point on said blade. The blade also includes a mounting aperture connected to the body member for releasably securing the blade to the hand held reciprocating power saw.
- The blade may be sized and configured to mitigate contact between the blade and utilities which may be disposed behind the drywall. In this manner, the blade may be configured to be inserted into the drywall, with a minimal amount of the blade being completely advanced therethrough. In addition, the blade may minimize the amount of dust generated during insertion and removal of the blade into and out of the drywall. In this regard, the at least one tooth may be configured to cut through an outer layer of the drywall to mitigate the amount of dust produced when cutting the drywall.
- The blade may include at least one saw tooth is formed in the bottom edge. The blade may further include an upper piercing edge and a lower piercing edge that intersect at a right angle. Furthermore, the blade may include a plurality of saw teeth. In addition, the thickness of the blade may be substantially uniform along its length.
- The present invention is best understood by reference to the following detailed description when read in conjunction with the accompanying drawings.
- These and other features and advantages of the various embodiments disclosed herein will be better understood with respect to the following description and drawings in which like numbers refer to like parts throughout and in which:
-
FIG. 1 is an upper perspective view of a blade for use with a reciprocating saw to cut drywall, the blade having a blade body, a blade tip, a pair of teeth, and an engagement element; -
FIG. 2 is a side elevation view of the blade illustrated inFIG. 1 ; -
FIG. 3 is a side elevation view of the blade connected to a reciprocating saw to define a saw-blade assembly, with the blade positioned for insertion into a section of drywall, the drywall having a first outer layer and an opposing second outer layer with an inner layer disposed therebetween; -
FIG. 4 is a side elevation view of the saw-blade assembly illustrated inFIG. 3 , with the blade advanced into the drywall; and -
FIG. 5 is a side elevation view of the saw-blade assembly illustrated inFIG. 4 , with the blade removed from the drywall. - Referring now to the drawings wherein the showings are for purposes of illustrating a preferred embodiment of the present invention only, and not for purposes of limiting the same,
FIGS. 1-6 illustrate adrywall cutting blade 10 constructed in accordance with an embodiment of the present invention. Various aspects of the invention are directed toward ablade 10 configured to reduce the amount of dust produced when cutting thedrywall 40. Furthermore, other aspects of the invention are directed toward mitigating contact between theblade 10 and utilities which may be disposed behind thedrywall 40, such as plumbing and electrical lines. - The
blade 10 is configured for use with a reciprocatingsaw 12 for cuttingdrywall 40. As used herein, areciprocating saw 12 is a tool that is engageable with a cutting instrument (such as a blade 10) to drive the cutting instrument through a cutting cycle. In most cases, the reciprocating saw repeatedly pushes and pulls theblade 10 through a cutting material. It is understood that reciprocatingsaws 12 are commonly employed in construction and demolition projects. The size and shape of thereciprocating saw 12 may vary. Reciprocating saw 12 are readily available in handheld and cordless models, as well as high-speed, high-power corded models. An exemplary reciprocating saw 12 is the DeWalt Heavy-Duty 10.0 Amp Reciprocating Saw manufactured by DeWalt, headquartered in Baltimore, Maryland. - Referring now specifically to
FIGS. 1 and 2 , theblade 10 includes ablade body member 14 defining abody leading portion 24 and abody engagement portion 26. As used herein, thebody engagement portion 26 refers to that portion of theblade body 14 that is disposed closest to the reciprocating saw 12 when theblade 10 is connected thereto. Furthermore, the leadingportion 24 refers to that portion of theblade body 14 that is farthest from thesaw 12 when theblade 10 is connected thereto. Thebody leading portion 24 is also that portion of thebody member 14 that is initially inserted into thedrywall 40. - The
blade body 14 includes a bodytop edge 18 and an opposingbody bottom edge 16. The body top andbottom edges blade body 14 between theblade engagement portion 26 and theblade leading portion 24. It may be desirable for the body top andbottom edges blade 10 from thedrywall 40. Furthermore, in one embodiment, the top andbottom edges FIGS. 1 and 2 ). However, it is understood that the body top andbottom edges blade 10 into and out of thedrywall 40 may further be facilitated by smooth, planar body top andbottom edges - The
blade 10 further includes a pair of opposinglateral surfaces 20 extending along the length of theblade 10. The lateral surfaces 20 extend between the bodytop edge 18 and thebody bottom edge 16. The distance between the opposinglateral surfaces 20 defines a blade thickness “T.” In one embodiment, the blade thickness T is substantially uniform. For instance, in one particular embodiment, the blade thickness T is approximately 0.05 inches. However, the thickness T may vary without departing from the spirit and scope of the present invention. - Given that the
blade 10 is configured to cutdrywall 40 through repeated insertion and removal of theblade 10 through thedrywall 40, it is desirable to form theblade body 14 out of a strong, durable material. In one particular embodiment, theblade body 14 is formed of steel. However, other materials known by those skilled in the art may also be used. - The
blade 10 includes ablade tip 28 for piercing through thedrywall 40 upon insertion of theblade 10 into thedrywall 40. Theblade tip 28 is connected to thebody leading portion 24. In one embodiment, theblade tip 28 is integrally formed with theblade body 14. Theblade tip 28 includes an upper piercingedge 30 connected to the bodytop edge 18 to define an upper tip angle a therebetween. Theblade tip 28 further includes a lower piercingedge 32 connected to thebody bottom edge 16 to define a lower tip angle φ therebetween. The upper piercingedge 30 and the lower piercingedge 32 intersect at aforward point 29 to define a primary tip angle θ. In one embodiment, and as depicted in the figures, the primary tip angle is 90 degrees. In other words, the upper piercingedge 30 is substantially orthogonal to the lower piercingedge 32. Accordingly, the upper and lower tip angles α, φ are obtuse in nature. In this regard, the upper and lower tip angles α, φ are greater than 90 degrees but less than 180 degrees. - The upper piercing
edge 30 defines an upper piercing length “U,” defined as the distance between theforward point 29 and the intersection between the upper piercingedge 30 and the bodytop edge 18. Thelower piercing edge 32 defines a lower piercing length “P,” defined as the distance between theforward point 29 and the intersection between the lower piercingedge 32 and thebody bottom edge 16. According to various embodiments, the upper piercing length U and the lower piercing length P may vary. For instance, in one embodiment, the upper piercing length U is greater than the lower piercing length P. However, in another embodiment, the upper piercing length U is less than the lower piercing length P. Furthermore, in an additional embodiment, the upper piercing length U and the lower piercing length P are substantially identical. - The
blade tip 28 may be formed of strong durable material capable of penetrating through thedrywall 40. In one embodiment, at least a portion of theblade tip 28 is formed of a carbide material (e.g. tungsten carbide, titanium carbide). Carbide may be desirable because of its tendency to remain sharp after repeated use. In another embodiment, theblade tip 28 may be formed of steel or other materials known by those skilled in the art. In this manner, theblade tip 28 may be formed of the same or different material used to form theblade body 14. - According to one aspect of the invention, the
blade 10 also includes one ormore teeth 34 for cutting a portion of thedrywall 40. Theteeth 34 are connected to theengagement portion 26 of theblade body member 14. As shown inFIGS. 1 and 2 , theblade 10 includes a pair ofteeth 34 connected to theengagement portion 26 at thebody bottom edge 16. However, it is understood that the size, shape, and number ofteeth 34 may vary. For instance, when cutting thicker pieces ofdrywall 40,larger teeth 34 may be desirable. As shown inFIG. 2 ,bottom edge 16 defines a non-serrated first segment S1 andteeth 34 define a serrated second segment S2. The interaction between theteeth 34 and thedrywall 40 will be described in more detail below. - The distance between the
forward point 29 and the mostrearward tooth 34 defines an operative blade length “L,” as depicted inFIG. 2 . As is clearly shown inFIG. 2 , in the exemplary embodiment, the operative blade length L extends from theforward point 29 to aproximal end 35. It is understood that utilities, including but not limited to, electrical wiring and plumbing may be disposed behind a sheet ofdrywall 40. When theblade 10 is advanced through thedrywall 40 for purposes of cutting thedrywall 40, there is a risk of contacting the utilities. Contact between theblade 10 and the utilities may damage the utilities as well as create a safety hazard. For instance, if theblade 10 contacts a live electrical wire, the user may be electrocuted. In addition, if ablade 10 punctures a plumbing line, the surrounding areas may become flooded. Consequently, considerable time and money may be expended to repair damage caused by inadvertent contact between theblade 10 and the utilities. Therefore, by minimizing the operative blade length L, contact between theblade 10 and utilities disposed behind thedrywall 40 may be mitigated. It is understood that various embodiments of the present invention include a blade length L that is considerably less than conventional saw blades. In this manner, it is less likely that theblade 10 will contact utilities disposed behind thedrywall 40. It is also understood that the blade length L may vary according to the thickness of thedrywall 40. For instance, for thicker pieces ofdrywall 40, a larger blade length L may be desired. - The
blade 10 additionally includes anengagement element 36 connected to theengagement portion 26 of theblade body member 14. Theengagement element 36 is sized and configured to be engageable with thereciprocating saw 12. Many conventional reciprocating saws 12 engage with ablade 10 by way of a through-hole formed in theblade 10. Accordingly, the embodiment illustrated inFIGS. 1 and 2 includes a mountingaperture 38 for engagement with areciprocating saw 12. The mountingaperture 38 extends between the opposinglateral surfaces 20 of theblade 10. It is understood that theengagement element 36 may take on other configurations without departing from the spirit and scope of the present invention. - Referring now to
FIGS. 3-5 , there is illustrated a sequence of blade positions relative to a section ofdrywall 40 during operation of theblade 10. Theblade 10 is operable to cutdrywall 40 upon repeatedblade 10 insertion and removal into and out of thedrywall 40.Conventional drywall 40 includes a firstouter layer 42 and an opposing secondouter layer 44. The first and secondouter layers drywall 40 includes a drywallinner layer 46 disposed between the opposing first and secondouter layers inner layer 46 typically includes a chalky material that tends to generate a substantial amount of dust as theblade 10 is advanced and removed therethrough.Conventional drywall 40 is typically manufactured in a number of standard thicknesses. The drywall thickness “D” is defined by the distance between the firstouter layer 42 and the secondouter layer 44.Drywall 40 having a thickness of ¼ inch, ½ inch, or ⅝ inch, is commonly used in the construction industry. -
FIG. 3 depicts a blade-saw assembly 50 including ablade 10 connected to areciprocating saw 12 having asaw guard 55. The blade-saw assembly 50 is positioned to cut thedrywall 40. In this regard, theblade 10 is positioned to enter thedrywall 40 through the firstouter layer 42. Theblade 10 is inserted into thedrywall 40 along aninsertion axis 52. According to one embodiment, theinsertion axis 52 is substantially orthogonal to adrywall axis 54 defined by the firstouter layer 42. In this manner, the blade-saw assembly 50 is held substantially orthogonal to the plane of thedrywall 40 when cutting thedrywall 40. - Referring now to
FIG. 4 , thesaw 12 is pressed toward thedrywall 40 to cause thesaw guard 55 to be disposed adjacent the firstouter layer 42. Furthermore, theblade 10 is advanced through thedrywall 40 to cause theblade tip 28 to pass through the firstouter layer 42 and the drywallinner layer 46. Theblade tip 28 also comes in contact with the secondouter layer 44. In one embodiment, theblade tip 28 may be configured to completely pass through the secondouter layer 44. This may be desirable to make a cleaner and more efficient cut of thedrywall 40. However, in another embodiment, theblade tip 28 may not pass completely through the secondouter layer 44. It may be desirable to mitigatecomplete blade tip 28 penetration through the secondouter layer 44 to protect against inadvertent contact with utilities. For instance, if a user knows, or has good reason to believe that utilities are disposed adjacent the secondouter layer 44, then full penetration of the secondouter layer 44 by theblade tip 28 may be undesirable. - Once the
blade 10 reaches its fully advanced position, it retracts through thedrywall 40. Upon retraction, theteeth 34 may cut through the firstouter layer 42 to facilitate removal of theblade 10 from thedrywall 40. The cutting of the firstouter layer 42 by theteeth 34 mitigates bunching of the firstouter layer 42. In other words, if the firstouter layer 42 is not cut by theteeth 34, the firstouter layer 42 has a tendency to gather and disrupt cutting of thedrywall 40. The smooth and planar body upper andlower edges blade 10 to glide through the drywallinner layer 46, which mitigates the amount of dust generated by cutting thedrywall 40. - It is contemplated that one particular embodiment of the
blade 10 does not includeblade teeth 34. Alternatively, theblade 10 may includeblade teeth 34 that are not advanced into thedrywall 34. In this manner, theblade 10 does not have to be inserted to a point where theteeth 34 at least pass through the firstouter layer 42. Rather, theblade 10 may be inserted until theblade tip 28 contacts the secondouter layer 44. Once theblade tip 28 achieves penetration through the secondouter layer 44, further insertion is not required. This may be desirable when it is known that utilities are disposed in close proximity to the secondouter layer 44. By minimizing the penetration depth, the chance of puncture or other damage to the utilities is reduced. Another benefit to theblade 10 not havingteeth 34 is that theblade 10 may cut thedrywall 40 in two directions. More specifically, theblade 10 may cut thedrywall 40 along the bodyupper edge 18, or alternatively along the bodylower edge 16. - When making the cut through the
drywall 40, the user presses thesaw 12 against thedrywall 40 to keep thesaw guard 55 adjacent the firstouter layer 42. The user may also direct thesaw 12 to in a direction to perform the desired cut. In this manner, theblade 10 reciprocates through thedrywall 40 to make the cut. Once the user completes the desired cut, theblade 10 is removed from thedrywall 40, as illustrated inFIG. 5 . - The above description is given by way of example, and not limitation. Given the above disclosure, one skilled in the art could devise variations that are within the scope and spirit of the invention disclosed herein. Further, the various features of the embodiments disclosed herein can be used alone, or in varying combinations with each other and are not intended to be limited to the specific combinations described herein. Thus, the scope of the claims is not to be limited by the illustrated embodiments.
Claims (18)
1-19. (canceled)
20. A blade for use with a reciprocating saw for cutting drywall, the drywall having a first drywall surface and an opposing second drywall surface defining a drywall thickness therebetween, the blade comprising:
a body member having a first body edge and an opposing, second body edge;
a blade tip integral with the body member, the blade tip including a first piercing edge angularly offset from the first body edge, and a second piercing edge angularly offset from the second body edge, the blade tip being adapted to pierce at least one of the first and second drywall surfaces; and
an engagement element connected to the body member, the engagement element being sized and configured to be releasably engageable with the reciprocating saw;
wherein the blade tip defines a distal end of the blade and the engagement element defines the proximal end of the blade, the distal end and the proximal ends of the blade defining a length, the length being no greater than twice the drywall thickness.
21. The blade of claim 20 wherein the length is substantially equal to the drywall thickness.
22. The blade of claim 20 wherein the first piercing edge and the first body edge intersect to form an obtuse angle.
23. The blade of claim 20 wherein the second piercing edge and the second body edge intersect to form an obtuse angle.
24. The blade of claim 20 wherein at least one of the first body edge or second body edge includes at least one saw tooth.
25. The blade of claim 20 wherein at least one of the first body edge or second body edge include at least one indent.
26. The blade of claim 20 wherein the second body edge includes indents wherein such indents do not exceed fifty percent of the length.
27. A blade for use with a reciprocating saw for cutting drywall, the drywall having a first drywall surface and an opposing second drywall surface defining a drywall thickness therebetween, the blade comprising:
a body member having a first body edge and an opposing second body edge;
a blade tip member intergral with the body member; and
an engagement element integral with the body member, the engagement element being sized and configured to be releasably engageable with the reciprocating saw;
wherein the blade tip member defines the distal end of a cutting portion of the blade and the exposed portion of the engagement element when it is affixed to a reciprocating saw defines the proximal end of the cutting portion of the blade, said distal and proximal ends of the blade cutting portion defining a length; and
wherein the length is no more than twice the drywall thickness.
28. The blade of claim 24 wherein the length is substantially equal to the drywall thickness.
29. The blade of claim 24 wherein at least one of the first body edge or second body edge includes at least one saw tooth.
30. The blade of claim 24 wherein the second piercing edge and the second body edge intersect to form an obtuse angle.
31. The blade of claim 24 wherein at least one of the first body edge or second body edge includes at least one saw tooth.
32. The blade of claim 24 wherein at least one of the first body edge or second body edge include at least one indent.
33. The blade of claim 24 wherein the second body edge includes indents wherein such indents do not exceed fifty percent of the length.
34. A blade for use with a reciprocating saw for cutting drywall, the drywall having a first drywall surface and an opposing second drywall surface defining a drywall thickness therebetween, the blade comprising:
a body member having a first body edge and an opposing second body edge;
a blade tip member intergral with the body member; and
an engagement element integral with the body member, the engagement element being sized and configured to be releasably engageable with the reciprocating saw;
wherein the blade tip member defines the distal end of a cutting portion of the blade and the exposed portion of the engagement element when it is affixed to a reciprocating saw defines the proximal end of the cutting portion of the blade, said distal and proximal ends of the blade cutting portion defining a length; and
wherein the second body edge along the length of the cutting portion of the blade includes at least one edge indent, said at least one edge indent providing indentation along less than 50 percent of the length of the cutting portion of the blade.
35. The blade of claim 34 wherein cutting portion is no more than twice the drywall thickness.
36. The blade of claim 34 wherein cutting portion is substantially equal to the drywall thickness.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US13/732,207 US20130111766A1 (en) | 2007-08-21 | 2012-12-31 | Reciprocating saw blade for cutting drywall |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US96567307P | 2007-08-21 | 2007-08-21 | |
US12/174,777 US8365644B2 (en) | 2007-08-21 | 2008-07-17 | Reciprocating saw blade for cutting drywall |
US13/732,207 US20130111766A1 (en) | 2007-08-21 | 2012-12-31 | Reciprocating saw blade for cutting drywall |
Related Parent Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/174,777 Continuation US8365644B2 (en) | 2007-08-21 | 2008-07-17 | Reciprocating saw blade for cutting drywall |
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US20130111766A1 true US20130111766A1 (en) | 2013-05-09 |
Family
ID=40380939
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Application Number | Title | Priority Date | Filing Date |
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US12/174,777 Active 2030-10-04 US8365644B2 (en) | 2007-08-21 | 2008-07-17 | Reciprocating saw blade for cutting drywall |
US13/732,207 Abandoned US20130111766A1 (en) | 2007-08-21 | 2012-12-31 | Reciprocating saw blade for cutting drywall |
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Application Number | Title | Priority Date | Filing Date |
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US12/174,777 Active 2030-10-04 US8365644B2 (en) | 2007-08-21 | 2008-07-17 | Reciprocating saw blade for cutting drywall |
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US8365644B2 (en) * | 2007-08-21 | 2013-02-05 | Huffer Brian J | Reciprocating saw blade for cutting drywall |
US10189099B2 (en) | 2010-04-22 | 2019-01-29 | Milwaukee Electric Tool Corporation | Saw Blade |
US8689667B2 (en) | 2010-04-22 | 2014-04-08 | Milwaukee Electric Tool Corporation | Saw blade |
CA2749666C (en) | 2010-08-20 | 2014-07-15 | Milwaukee Electric Tool Corporation | Reciprocating saw blade |
CN102041895A (en) * | 2011-01-08 | 2011-05-04 | 朱春梅 | Spatula for electric tool |
EP2516091A4 (en) | 2011-03-07 | 2014-05-21 | Infusion Brands Inc | Dual blade reciprocating saw |
USD841417S1 (en) | 2011-04-22 | 2019-02-26 | Milwaukee Electric Tool Corporation | Saw blade |
CA2836701C (en) | 2011-05-27 | 2019-01-29 | Sm Products, Llc | Reciprocating saw blade |
US9702153B2 (en) | 2012-02-10 | 2017-07-11 | Milwaukee Electric Tool Corporation | Accessory for a reciprocating saw |
US9643267B2 (en) | 2012-03-01 | 2017-05-09 | Milwaukee Electric Tool Corporation | Blade for a reciprocating saw |
US10293422B2 (en) | 2012-03-01 | 2019-05-21 | Milwaukee Electric Tool Corporation | Blade for a reciprocating saw |
USD741126S1 (en) * | 2014-10-28 | 2015-10-20 | Roger M. Sis | Saw blade |
USD764247S1 (en) * | 2015-04-17 | 2016-08-23 | Milwaukee Electric Tool Corporation | Saw blade |
EP4101611A1 (en) | 2017-05-16 | 2022-12-14 | Milwaukee Electric Tool Corporation | Saw blade |
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US8365644B2 (en) | 2013-02-05 |
US20090049973A1 (en) | 2009-02-26 |
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