Attorney Docket No. 066042-8368 USO1
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`HOLE SAW
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`[0001]
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`The present invention relates to power tool accessories, and morespecifically, to
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`a hole saw.
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`[0002]
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`In one embodiment, the invention provides a hole saw. The hole saw includes a
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`cylindrical body disposed along an axis. The cylindrical body includes a cap end, a cutting end,
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`and a side wall extending axially between the cap end and the cutting end. The side wall
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`includes a pair of apertures. Each apertureis defined by a first slot portion and a secondslot
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`portion, each orientated substantially perpendicular to the axis. Thefirst slot portion is disposed
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`closer to the cutting end, and the secondslot portion is disposed closer to the cap end. A
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`connecting slot portion connectsthe first slot portion and the second slot portion. The cap end
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`defines semi-circular slots. A cap is coupled to the cap end. The cap includes a main aperture
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`centered about the axis and configured to receive a mandrel or equivalenttool.
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`[0003]
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`In another embodiment, the invention provides a hole saw. The hole saw
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`includes a cylindrical body disposed along an axis. The cylindrical body includesa cap end, a
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`cutting end, and a side wall extending axially between the cap end and the cutting end. A cap is
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`coupled to the cap end. The cap includes a main aperture configured to receive a mandrel or
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`equivalent tool. An aperture is defined in the body and the cap. The aperture includesa first slot
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`portion, a secondslot portion, a connecting slot portion, and a vertical slot portion. The first slot
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`portion and the secondslot portion are each oriented substantially parallel to the cap end and are
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`connected by the connecting slot portion. The vertical slot portion extends from the secondslot
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`portion throughthe cap.
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`[0004]
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`In another embodiment, the invention provides a hole saw. The hole saw
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`includes a cylindrical body disposed along an axis. The cylindrical body includesa cap end, a
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`cutting end, and a side wall extending axially between the cap end and the cutting end. The side
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`wall includes a pair of apertures. Each aperture is defined by a first slot portion connected to a
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`secondslot portion. Thefirst slot portion is orientated substantially perpendicular to the axis,
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`and the secondslot portion is oriented at an acute angle relative to the axis. The cap end defines
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`a semi-circular slot configured to receive a plug-removingtool.
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`Attorney Docket No. 066042-8368 USO1
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`[0005]
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`In yet another embodiment, the invention provides a hole saw. The hole saw
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`body includes a cylindrical body disposed along an axis. The cylindrical body includes a cap
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`end, a cutting end, and a side wall extending axially between the cap end and the cutting end.
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`The side wall includesa pair of apertures. Each aperture is defined bya first slot portion, a
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`second slot portion, and a third slot portion, each orientated substantially perpendicular to the
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`axis. Thefirst slot portion is disposed closer to the cutting end, and the third slot portion is
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`disposed closer to the cap end. The secondslot portion is disposed betweenthefirst slot portion
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`and the third slot portion. A first connecting slot portion connectsthe first slot portion and the
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`secondslot portion andis oriented at a first acute angle relative to the cap end. A second
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`connecting slot portion connects the second slot portion andthe third slot and is oriented at a
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`second acute angle relative to the cap end.
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`[0006]
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`Other aspects of the invention will become apparent by consideration of the
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`detailed description and accompanying drawings.
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`[0007]
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`Fig. 1 is a perspective view of a hole saw accordingto a first embodimentof the
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`invention.
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`[0008]
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`Fig. 2 is a side view ofthe hole saw ofFig. 1.
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`[0009]
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`Fig. 3 is a planar view of a cylindrical body of the hole saw ofFig. 1.
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`[0010]
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`Fig. 4 is a top view ofthe hole saw ofFig. 1.
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`[0011]
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`Fig. 5 is a perspective view of a hole saw according to another embodiment of
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`the invention.
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`[0012]
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`Fig. 6 is a side view ofa first aperture of the hole saw ofFig. 5.
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`[0013]
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`Fig. 7 is a side view of a second aperture ofthe hole saw of Fig. 5.
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`[0014]
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`Fig. 8 is a top view ofthe hole saw ofFig. 5.
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`[0015]
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`Fig. 9 is a side view ofa third aperture of the hole saw ofFig. 5.
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`Attorney Docket No. 066042-8368 USO1
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`{0016}
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`Fig. 10 is a planar view ofa cylindrical body of a hole saw according to another
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`embodimentof the invention.
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`[0017]
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`Fig. 11 is a planar view ofa cylindrical body of a hole saw according to another
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`embodimentof the invention.
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`[0018]
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`Before any embodiments of the invention are explained in detail, it is to be
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`understood that the invention is not limited in its application to the details of construction and the
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`arrangement of componentsset forth in the following description or illustrated in the following
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`drawings. The invention is capable of other embodiments andof being practiced or of being
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`carried out in various ways.
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`[0019]
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`Figs. 1-11 illustrate a power tool accessory, such as, for example, a hole-saw,
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`for operation with a powertool(e.g., a drill, a driver-drill, a screwdriver, and the like). In some
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`embodiments, the power tool accessory is operable to cut holes of different sizes in a workpiece
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`and/or to remove plugs from the workpiece.
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`[0020]
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`Fig. 1 illustrates an embodiment of a power tool accessory, and more
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`specifically, a hole saw 10. The hole saw 10 includes a cylindrical body 14 disposed along an
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`axis of rotation 18. The cylindrical body 14 is defined by a side wall 22 that extends between a
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`cap end 26 and a cutting end 30.
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`[0021]
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`Asshownin Fig. 1, the cutting end 30 includesa plurality of cutting teeth 34.
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`Each ofthe plurality of teeth 34 is defined by a leading edge 38 anda trailing edge 42.
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`[0022]
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`Asshownin Fig. 3, a pair of elongated apertures 46 are defined within the side
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`wall 22. Each elongated aperture 46 is defined byafirst slot portion 50 and a secondslot portion
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`54, each orientated substantially perpendicular to the axis 18. Thefirst slot portion 50 is
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`circumferentially disposed closer to the cutting end 30, and the secondslot portion 54 is disposed
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`closer to the cap end 26. Thefirst slot portion 50 is offset relative to the second slot portion 54.
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`A connecting slot portion 58 connects the first slot portion 50 and the secondslot portion 54.
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`The connecting slot portion 58 is at an angle relative to the cap end 26 and the cutting end 30.
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`Thefirst slot portion 50, the secondslot portion 54, and the connecting slot portion 58 all have
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`Attorney Docket No. 066042-8368 USO1
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`substantially the same width. The apertures 46 are configured to receive a tool (not shown) for
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`removing plugs from within the cylindrical body 14.
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`[0023]
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`Asillustrated in Fig. 3, the cap end 26 defines semi-circular slots 62 configured
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`to receive a plug-removing tool (not shown).
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`[0024]
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`Referring to Fig. 2, a cap 66 is coupled to the cap end 26 of the cylindrical body
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`14. The cap 66 has substantially the same diameter as the cylindrical body 14 andis welded to
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`the cap end 26 with a substantially continuous weld between the semi-circular slots 62. The cap
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`66 includes a rim portion 70 that seats on the cap end 26 and an axially extending portion 74 that
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`extends into the cap end 26. The rim portion 70 is substantially perpendicular to the axially
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`extending portion 74. As shownin Fig. 4, the cap 66 defines a main aperture 78 centered about
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`the axis 18 and configured to receive a mandrel or equivalent tool (not shown). A plurality of
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`holes 82 are defined in the cap 66 and surround the main aperture 78. The plurality of holes 82
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`are circumferentially arranged aboutthe axis 18.
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`[0025]
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`Figs. 5-9 illustrate another embodiment of a hole saw 84. The hole saw 84 has
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`substantial similarities to the hole saw 10 described with respect to Figs. 1-4, and only those
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`aspects that differ from the embodiments of Figs. 1-4 will be described herein.
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`[0026]
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`Referring to Fig. 5, the hole saw 84 includes a cylindrical body 88 and a cap 92.
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`The cylindrical body 88 includesa side wall 96 havinga first aperture 100, a second aperture
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`104, and a third aperture 108. The apertures 100, 104, 108 are configured to receive a tool (not
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`shown) for removing the plugs from within the cylindrical body 88.
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`[0027] Asshownin Fig. 6, the first aperture 100 is defined byafirst slot portion 112
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`and a secondslot portion 116. The first slot portion 112 and the second slot portion 116 are each
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`orientated substantially perpendicular to the axis 18. A connecting slot portion 118 connects the
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`first slot portion 112 and the secondslot portion 116.
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`[0028]
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`Asshownin Fig. 7, the second aperture 104 is defined by a sidewall portion 120
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`and a cap portion 124. The sidewall portion 120 extends through the side wall 96 and terminates
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`Attorney Docket No. 066042-8368 USO1
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`at an edge 128 perpendicular to the axis 18. The cap portion 124 extends through the cap 92 and
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`terminates at a semi-circular edge 132 as shownin Fig. 8.
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`[0029]
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`Referring to Fig. 9, the third aperture 108 includesa first slot portion 136, a
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`secondslot portion 140, a connecting slot portion 144, and a vertical slot portion 148. Thefirst
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`slot portion 136 and the secondslot portion 140 are each oriented perpendicular to the axis 18
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`and are connected by the connecting slot portion 144. The vertical slot portion 148 extends from
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`the secondslot portion 140 through the cap 92 and terminates at a semi-circular edge 152 within
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`the cap 92 as shownin Fig 8.
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`[0030]
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`The cap 92 is welded to the body 88, with a substantially continuous welds
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`interrupted by the cap portion 124 of the second aperture 104 and the vertical slot portion 148 of
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`the third aperture.
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`[0031]
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`Fig. 10 illustrates yet another embodimentof a hole saw 156. The hole saw 156
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`has substantial similarities to the hole saw 10 described with respect to Figs. 1-4, and only those
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`aspects that differ from the embodiments of Figs. 1-4 will be described herein.
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`[0032]
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`Referring to Fig. 10, the hole saw 156 includes a cylindrical body 160 having a
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`side wall 164 extending between a cap end 168 and a cutting end 172. The cap end 168 defines a
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`semi-circular slot 170 configured to receive a plug-removing tool (not shown).
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`[0033]
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`A pair of elongated apertures 174 are defined within the side wall 164. Each
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`aperture 174 is configured to receive a tool (not shown) for removing workpiece plugs from
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`within the cylindrical body 160. Each elongated aperture 174 is defined byafirst slot portion
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`178 and a secondslot portion 182. Thefirst slot portion 178 is oriented substantially
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`perpendicular to the axis 18. The secondslot portion 182 connectsto thefirst slot portion 178
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`andis oriented at an angle f relative to the axis 18. In the illustrated embodiment, the angle f is
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`between approximately 14.5 degrees and approximately 15.5 degrees, but other embodiments
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`may include other orientations. Thefirst slot portion 178 and the second slot portion 182 have
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`substantially the same width 184.
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`Attorney Docket No. 066042-8368 USO1
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`[0034]
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`Fig. 11 illustrates yet another embodimentof a hole saw 190. The hole saw 190
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`has substantial similarities to the hole saw 10 described with respect to Figs. 1-4, and only those
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`aspects that differ from the embodiments of Figs. 1-4 will be described herein.
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`[0035]
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`Asshownin Fig. 11, the hole saw 190 includes a cylindrical body 194 having a
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`side wall 198 extending between a cap end 202 and a cutting end 206. A pair of elongated
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`apertures 210 are defined within the side wall 214. The elongated apertures 210 are configured
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`to receive a tool (not shown) for removing plugs from within the cylindrical body 194. Each
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`elongated aperture 210 is defined by a first slot portion 218, a second slot portion 222, and a
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`third slot portion 226, each oriented substantially perpendicular to the axis 18. The first slot
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`portion 218 is disposed closer to the cutting end 206, and the third slot portion 226 is disposed
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`closer to the cap end 202. The secondslot portion 222 is disposed betweenthe first slot portion
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`218 andthe third slot portion 226.
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`[0036]
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`A first connecting slot portion 230 connects the first slot portion 218 and the
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`second slot portion 222. The first connecting slot portion 230 is oriented an angle 8 relative to
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`the cap end 202 andthe cutting end 206. In the illustrated embodiment, the angle 9 is between
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`approximately 50.2 degrees and approximately 51.2 degrees, but other embodiments may include
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`other orientations.
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`[0037]
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`A second connecting slot portion 234 connects the second slot portion 222 and
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`the third slot portion 226. The second connecting slot portion 234 is oriented at an angle a
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`relative to the cap end 202 and the cutting end 206. In the illustrated embodiment, the angle a is
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`between approximately 31.3 degrees and approximately 32.3 degrees, but other embodiments
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`may include other angle ranges.
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`[0038]
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`Although the invention has been described with reference to certain preferred
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`embodiments, variations and modifications exist within the scope andspirit of one or more
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`independentaspects of the invention as described.
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