U.S. patent number RE48,513 [Application Number 16/517,476] was granted by the patent office on 2021-04-13 for hole saw.
This patent grant is currently assigned to MILWAUKEE ELECTRIC TOOL CORPORATION. The grantee listed for this patent is MILWAUKEE ELECTRIC TOOL CORPORATION. Invention is credited to Ryan J. Malloy, Geoffrey R. Piller, Todd A. Taylor, Jason M. Thom.
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United States Patent |
RE48,513 |
Piller , et al. |
April 13, 2021 |
Hole saw
Abstract
A hole saw includes a cylindrical body disposed along an axis of
rotation with a side wall extending axially from a cap end to a
cutting end. The cutting end includes a plurality of cutting teeth.
The hole saw also includes a cap coupled to the cap end of the
cylindrical body. The side wall defines an elongated aperture
configured to receive a tool for removing work piece plugs from
within the cylindrical body. The elongated aperture has a first
slot portion adjacent the cutting edge. The first slot portion is
oriented perpendicular to the axis of rotation. The elongated
aperture also has a second slot portion connected to the first slot
portion and extending from the first slot portion toward the cap
end. The second slot portion is oriented at an oblique angle
relative to the axis of rotation.
Inventors: |
Piller; Geoffrey R. (Whitefish
Bay, WI), Thom; Jason M. (Wauwatosa, WI), Malloy; Ryan
J. (Milwaukee, WI), Taylor; Todd A. (West Bend, WI) |
Applicant: |
Name |
City |
State |
Country |
Type |
MILWAUKEE ELECTRIC TOOL CORPORATION |
Brookfield |
WI |
US |
|
|
Assignee: |
MILWAUKEE ELECTRIC TOOL
CORPORATION (Brookfield, WI)
|
Family
ID: |
49946675 |
Appl.
No.: |
16/517,476 |
Filed: |
July 19, 2019 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
Issue Date |
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13945643 |
Feb 28, 2017 |
9579732 |
|
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61673124 |
Jul 18, 2012 |
|
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|
61717389 |
Oct 23, 2012 |
|
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|
61784172 |
Mar 14, 2013 |
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Reissue of: |
15407005 |
Jan 16, 2017 |
10086445 |
Oct 2, 2018 |
|
|
Current U.S.
Class: |
1/1 |
Current CPC
Class: |
B23B
51/0406 (20130101); B23B 51/0453 (20130101); B23B
2251/428 (20130101); B23B 2260/072 (20130101); Y10T
408/895 (20150115); B23B 2260/082 (20130101) |
Current International
Class: |
B23B
51/04 (20060101) |
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Other References
Makita Industrial Power Tools, 1998-1999 General Catalog (1998)
IS09002, p. 96. cited by applicant .
Inter Partes Review No. 2015-01461, "Petition for Inter Partes
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|
Primary Examiner: Kaufman; Joseph A
Attorney, Agent or Firm: Morgan, Lewis & Bockius LLP
Parent Case Text
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation of U.S. patent application Ser.
No. 13/945,643, filed Jul. 18, 2013, now U.S. Pat. No. 9,579,732,
which claims priority to U.S. Provisional Patent Application No.
61/673,124, filed Jul. 18, 2012, U.S. Provisional Patent
Application No. 61/717,389, filed Oct. 23, 2012, and U.S.
Provisional Patent Application No. 61/784,172, filed Mar. 14, 2013,
the contents of each of which are incorporated by reference herein.
Claims
What is claimed is:
1. A hole saw comprising: a cylindrical body disposed along an axis
of rotation with a side wall extending axially from a cap end to a
cutting end, the cutting end including a plurality of cutting
teeth; and a cap coupled to the cap end of the cylindrical body;
wherein the side wall defines an elongated aperture configured to
receive a tool for removing work piece plugs from within the
cylindrical body, the elongated aperture comprising: a first slot
portion adjacent the cutting end, the first slot portion defined by
a first edge of the side wall that is perpendicular to the axis of
rotation and a second edge of the side wall that is spaced apart
from the first edge and perpendicular to the axis of rotation, the
first slot portion having a first length and a first width, the
first length being perpendicular to the axis of rotation, and the
first length being greater than the first width; and a second slot
portion connected to the first slot portion and extending from the
first slot portion toward the cap end, the second slot portion
oriented at an oblique angle relative to the axis of rotation, the
second slot portion having a second length and a second width, the
second length being oriented at the oblique angle relative to the
axis of rotation, and the second length being greater than the
second width.
2. The hole saw of claim 1, wherein the first slot portion and the
second slot portion have the same width.
3. The hole saw of claim 1, wherein the oblique angle is between
14.5 degrees and 15.5 degrees.
4. The hole saw of claim 1, wherein the second slot portion is
connected to and extends from an end of the first slot portion.
5. The hole saw of claim 1, wherein the second slot portion is
longer than the first slot portion.
6. The hole saw of claim 1, wherein the side wall defines a
plurality of elongated apertures .Iadd.including the elongated
aperture in claim 1.Iaddend., each .Iadd.of the plurality of
.Iaddend.elongated .[.aperture.]. .Iadd.apertures
.Iaddend.comprising: a first slot portion adjacent the cutting end,
the first slot portion defined by a first edge of the side wall
that is perpendicular to the axis of rotation and a second edge of
the side wall that is spaced apart from the first edge and
perpendicular to the axis of rotation, and a second slot portion
connected to the first slot portion and extending from the first
slot portion toward the cap end, the second slot portion oriented
at an oblique angle relative to the axis of rotation.
7. The hole saw of claim 1, wherein the cap end defines a
semi-circular slot configured to receive .[.a plug-removing.].
.Iadd.the .Iaddend.tool.
8. The hole saw of claim 1, wherein the plurality of cutting teeth
includes an abrasive coating.
9. The hole saw of claim 1, wherein the first slot portion does not
extend through the cutting end of the cylindrical body.
10. The hole saw of claim 1, wherein the second slot portion does
not extend through the cap end of the cylindrical body.
11. The hole saw of claim 1, wherein the cap includes a rim portion
seated on the cap end and an axially extending portion extending
into the cylindrical body from the cap end.
12. A hole saw comprising: a cylindrical body disposed along an
axis of rotation with a side wall extending axially from a cap end
to a cutting end, the cutting end including a plurality of cutting
teeth; and a cap coupled to the cap end of the cylindrical body;
wherein the side wall defines a pair of elongated apertures
configured to receive a tool for removing work piece plugs from
within the cylindrical body, each elongated aperture comprising: a
first slot portion adjacent the cutting end, the first slot portion
defined by a first edge of the side wall that is perpendicular to
the axis of rotation and a second edge of the side wall that is
spaced apart from the first edge and perpendicular to the axis of
rotation, the first slot portion having a first length and a first
width, the first length being perpendicular to the axis of
rotation, and the first length being greater than the first width;
and a second slot portion connected to the first slot portion and
extending from the first slot portion toward the cap end, the
second slot portion oriented at an oblique angle relative to the
axis of rotation, the second slot portion having a second length
and a second width, the second length being oriented at the oblique
angle relative to the axis of rotation, and the second length being
greater than the second width.
13. The hole saw of claim 12, wherein the first slot portion and
the second slot portion have the same width.
14. The hole saw of claim 12, wherein the oblique angle is between
14.5 degrees and 15.5 degrees.
15. The hole saw of claim 12, wherein the second slot portion is
connected to and extends from an end of the first slot portion.
16. The hole saw of claim 12, wherein the second slot portion is
longer than the first slot portion.
.Iadd.17. A hole saw comprising: a cylindrical body disposed along
an axis of rotation with a side wall extending axially from a first
end to a cutting end, the cutting end opposing the first end and
including a plurality of cutting teeth; wherein the side wall
defines a first elongated aperture configured to receive a tool for
removing work piece plugs from within the cylindrical body, the
first elongated aperture comprising: a first slot portion adjacent
the cutting end, the first slot portion defined by a first edge of
the side wall that is perpendicular to the axis of rotation and a
second edge of the side wall that is spaced apart from the first
edge and perpendicular to the axis of rotation, the first slot
portion having a first length and a first width, the first length
being perpendicular to the axis of rotation, and the first length
being greater than the first width; and a second slot portion
connected to the first slot portion and extending from the first
slot portion toward the first end, the second slot portion oriented
at an oblique angle relative to the axis of rotation, the second
slot portion having a second length and a second width, the second
length being oriented at the oblique angle relative to the axis of
rotation, and the second length being greater than the second
width; and wherein the side wall defines a plurality of elongated
apertures including the first elongated aperture, each of the
plurality of elongated apertures comprising: a first slot portion
adjacent the cutting end, the first slot portion defined by a first
edge of the side wall that is perpendicular to the axis of rotation
and a second edge of the side wall that is spaced apart from the
first edge and perpendicular to the axis of rotation, and a second
slot portion connected to the first slot portion and extending from
the first slot portion toward the first end, the second slot
portion oriented at an oblique angle relative to the axis of
rotation..Iaddend.
.Iadd.18. A hole saw comprising: a cylindrical body disposed along
an axis of rotation with a side wall extending axially from a first
end to a cutting end, the cutting end opposing the first end and
including a plurality of cutting teeth; wherein the side wall
defines a pair of elongated apertures configured to receive a tool
for removing work piece plugs from within the cylindrical body,
each elongated aperture comprising: a first slot portion adjacent
the cutting end, the first slot portion defined by a first edge of
the side wall that is perpendicular to the axis of rotation and a
second edge of the side wall that is spaced apart from the first
edge and perpendicular to the axis of rotation, the first slot
portion having a first length and a first width, the first length
being perpendicular to the axis of rotation, and the first length
being greater than the first width; and a second slot portion
connected to the first slot portion and extending from the first
slot portion toward the first end, the second slot portion oriented
at an oblique angle relative to the axis of rotation, the second
slot portion having a second length and a second width, the second
length being oriented at the oblique angle relative to the axis of
rotation, and the second length being greater than the second
width..Iaddend.
.Iadd.19. The hole saw of claim 1, wherein the side wall defines a
plurality of elongated apertures including the elongated aperture
in claim 1, each of the plurality of elongated apertures
comprising: a first slot portion adjacent the cutting end, the
first slot portion defined by a first edge of the side wall that is
perpendicular to the axis of rotation and a second edge of the side
wall that is spaced apart from the first edge and perpendicular to
the axis of rotation..Iaddend.
.Iadd.20. The hole saw of claim 1, wherein the side wall defines a
plurality of elongated apertures including the elongated aperture
in claim 1, each of the plurality of elongated apertures
comprising: a first slot portion adjacent the cutting end; and a
second slot portion extending from the first slot portion toward
the cap end, the second slot portion oriented at an oblique angle
relative to the axis of rotation..Iaddend.
Description
BACKGROUND
The present invention relates to power tool accessories, and more
specifically, to hole saws.
A hole saw is a type of circular saw with a cylindrical, cup-like
body that is rotated about a central axis in order to cut a
cylindrical plug from a work piece, thereby forming a circular
aperture in the work piece. The plug, or core, of the work piece is
received within the cup-like body as the hole saw progresses
through the work piece. Under certain conditions, the plug can
become trapped within the body, necessitating manual removal of the
plug by the user.
SUMMARY
In one embodiment, the invention provides a hole saw including a
cylindrical body disposed along an axis of rotation with a side
wall extending axially from a cap end to a cutting end. The cutting
end includes a plurality of cutting teeth. A cap includes a rim
portion seated on the cap end and an axially extending portion
extending into the cylindrical body from the cap end. The side wall
defines an aperture including a first slot portion and a second
slot portion disposed closer to the cap end than the first slot
portion. A wall of the second slot portion nearest the cap end is
between approximately 0.010 inches and approximately 0.120 inches
axially offset from the axially extending portion of the cap.
In another embodiment the invention provides a hole saw. A
cylindrical body is disposed along an axis of rotation and includes
a side wall extending axially from a cap end to a cutting end. The
cutting end includes a plurality of cutting teeth. A cap includes a
rim portion seated on the cap end and an axially extending portion
extending into the cylindrical body from the cap end. The side wall
defines an aperture including a first slot portion oriented
substantially perpendicular to the axis and a second slot portion
disposed closer to the cap end than the first slot portion. A wall
of the second slot portion nearest the cap end is between
approximately 0.010 inches and approximately 0.120 inches axially
offset from the axially extending portion of the cap. A connecting
slot portion connects the first slot portion and the second slot
portion.
Other aspects of the invention will become apparent by
consideration of the detailed description and accompanying
drawings.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a hole saw according to a first
embodiment of the invention.
FIG. 2 is a side view of the hole saw of FIG. 1.
FIG. 3 is a planar view of a cylindrical body of the hole saw of
FIG. 1.
FIG. 4 is a top view of the hole saw of FIG. 1.
FIG. 5 is a perspective view of a hole saw according to another
embodiment of the invention.
FIG. 6 is a side view of a first aperture of the hole saw of FIG.
5.
FIG. 7 is a side view of a second aperture of the hole saw of FIG.
5.
FIG. 8 is a top view of the hole saw of FIG. 5.
FIG. 9 is a side view of a third aperture of the hole saw of FIG.
5.
FIG. 10 is a planar view of a cylindrical body of a hole saw
according to another embodiment of the invention.
FIG. 11 is a planar view of a cylindrical body of a hole saw
according to another embodiment of the invention.
FIG. 12 is a planar view of a cylindrical body of a hole saw
according to another embodiment of the invention.
FIG. 13 is a planar view of a cylindrical body of a hole saw
according to another embodiment of the invention.
FIG. 14 is a planar view of a cylindrical body of a hole saw
according to another embodiment of the invention.
FIG. 15 is a planar view of a cylindrical body of a hole saw
according to another embodiment of the invention.
FIG. 16 is a planar view of a cylindrical body of a hole saw
according to another embodiment of the invention.
FIG. 17 is a planar view of a cylindrical body of a hole saw
according to another embodiment of the invention.
FIG. 18 is a planar view of a cylindrical body of a hole saw
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.
DETAILED DESCRIPTION
FIGS. 1-18 illustrate a power tool accessory, such as, for example,
a hole-saw, for operation with a power tool (e.g., a drill, a
driver-drill, a screwdriver, and the like). In some embodiments,
the power tool accessory is operable to cut holes of different
sizes in a work piece and/or to remove plugs from the work piece.
Each of the embodiments of the invention described below includes a
cylindrical body defining at least one slot or aperture (e.g., a
pair of slots or apertures). Hole saws including any number (e.g.,
one, two, three, or more) of the disclosed slots or apertures, and
variations thereof, are within the scope of the invention.
FIGS. 1-4 illustrates an embodiment of a power tool accessory, and
more specifically, a hole saw 10. The hole saw 10 includes a
cylindrical body 14 disposed along an axis of rotation 18. The
cylindrical body 14 is defined by a side wall 22 that extends
between a cap end 26 and a cutting end 30. As shown in FIG. 1, the
cutting end 30 includes cutting teeth 34. Each of the teeth 34 is
defined by a leading edge 38 and a trailing edge 42.
As shown in FIG. 3, elongated apertures 46 are defined within the
side wall 22. Each elongated aperture 46 is defined by a first slot
portion 50 and a second slot portion 54, each orientated
substantially perpendicular to the axis 18. The first slot portion
50 is axially disposed closer to the cutting end 30, and the second
slot portion 54 is disposed closer to the cap end 26. The first
slot portion 50 is offset relative to the second slot portion 54. A
connecting slot portion 58 connects the first slot portion 50 and
the second slot portion 54. The connecting slot portion 58 is at an
angle relative to the cap end 26 and the cutting end 30. The first
slot portion 50, the second slot portion 54, and the connecting
slot portion 58 all have substantially the same width, though in
other embodiments they may have different widths. The second slot
portion 54 includes an upper wall 55 that is substantially parallel
to the cap end 26 and is located at a maximum distance D of
approximately 0.2 inches from the cap end 26. Alternatively, the
upper wall 55 of the second slot portion 54 may be flush with the
cap end 26 such that distance D is zero, or the second slot portion
54 may extend through a cap (not shown). The apertures 46 are
configured to receive a tool (not shown) for removing plugs from
within the cylindrical body 14.
As illustrated in FIG. 3, the cap end 26 defines semi-circular
slots 62 configured to receive a plug-removing tool (not
shown).
Referring to FIG. 2, a cap 66 is coupled to the cap end 26 of the
cylindrical body 14. The cap 66 has substantially the same diameter
as the cylindrical body 14 and is welded to the cap end 26 with a
substantially continuous weld between the semi-circular slots 62.
The cap 66 includes a rim portion 70 that seats on the cap end 26
and an axially extending portion 74 that extends into the cap end
26 of the cylindrical body. The rim portion 70 is substantially
perpendicular to the axially extending portion 74. As shown in FIG.
4, the cap 66 defines a main aperture 78 centered about the axis 18
and configured to receive a mandrel or equivalent tool (not shown).
A plurality of holes 82 are defined in the cap 66 and surround the
main aperture 78. The plurality of holes 82 are circumferentially
arranged about the axis 18.
FIGS. 5-9 illustrate another embodiment of a hole saw 84. The hole
saw 84 has substantial similarities to the hole saw 10 described
with respect to FIGS. 1-4, and only those aspects that differ from
the embodiments of FIGS. 1-4 will be described herein. Referring to
FIG. 5, the hole saw 84 includes a cylindrical body 88 and a cap
92. The cylindrical body 88 includes a side wall 96 having a first
aperture 100, a second aperture 104, and a third aperture 108. The
apertures 100, 104, 108 are configured to receive a tool (not
shown) for removing the plugs from within the cylindrical body
88.
As shown in FIG. 6, the first aperture 100 is defined by a first
slot portion 112 and a second slot portion 116. The first slot
portion 112 and the second slot portion 116 are each orientated
substantially perpendicular to the axis 18. A connecting slot
portion 118 connects the first slot portion 112 and the second slot
portion 116. The second slot portion 116 includes an upper wall 117
that is substantially parallel to the cap end 92 and is located at
a maximum distance D of approximately 0.2 inches from the cap end
92. Alternatively, the upper wall 117 of the second slot portion
116 may be flush with the cap end 92 such that distance D is zero,
or the second slot portion 116 may extend through the cap 92 (FIG.
5).
As shown in FIG. 7, the second aperture 104 is defined by a
sidewall portion 120 and a cap portion 124. The sidewall portion
120 extends through the side wall 96 and terminates at an edge 128
that is substantially perpendicular to the axis 18. The cap portion
124 extends through the cap 92 and terminates at a semi-circular
edge 132 as shown in FIG. 8.
Referring to FIG. 9, the third aperture 108 includes a first slot
portion 136, a second slot portion 140, a connecting slot portion
144, and a vertical slot portion 148. The first slot portion 136
and the second slot portion 140 are each oriented substantially
perpendicular to the axis 18 and are connected by the connecting
slot portion 144. The vertical slot portion 148 extends from the
second slot portion 140 through the cap 92 and terminates at a
semi-circular edge 152 within the cap 92 as shown in FIG. 8.
The cap 92 is welded to the body 88, with a substantially
continuous welds interrupted by the cap portion 124 of the second
aperture 104 and the vertical slot portion 148 of the third
aperture.
FIG. 10 illustrates yet another embodiment of a hole saw 156. The
hole saw 156 has substantial similarities to the hole saw 10
described with respect to FIGS. 1-4, and only those aspects that
differ from the embodiments of FIGS. 1-4 will be described
herein.
Referring to FIG. 10, the hole saw 156 includes a cylindrical body
160 having a side wall 164 extending between a cap end 168 and a
cutting end 172. The cap end 168 defines a semi-circular slot 170
configured to receive a plug-removing tool (not shown).
A pair of elongated apertures 174 are defined within the side wall
164. Each aperture 174 is configured to receive a tool (not shown)
for removing work piece plugs from within the cylindrical body 160.
Each elongated aperture 174 is defined by a first slot portion 178
and a second slot portion 182. The first slot portion 178 is
oriented substantially perpendicular to the axis 18. The second
slot portion 182 connects to the first slot portion 178 and is
oriented at an angle .beta. relative to the axis 18. In the
illustrated embodiment, the angle .beta. is between approximately
14.5 degrees and approximately 15.5 degrees, but other embodiments
may include other orientations. The first slot portion 178 and the
second slot portion 182 have substantially the same width 184.
FIG. 11 illustrates yet another embodiment of a hole saw 190. The
hole saw 190 has substantial similarities to the hole saw 10
described with respect to FIGS. 1-4, and only those aspects that
differ from the embodiments of FIGS. 1-4 will be described
herein.
As shown in FIG. 11, the hole saw 190 includes a cylindrical body
194 having a side wall 198 extending between a cap end 202 and a
cutting end 206. A pair of elongated apertures 210 are defined
within the side wall 214. The elongated apertures 210 are
configured to receive a tool (not shown) for removing plugs from
within the cylindrical body 194. Each elongated aperture 210 is
defined by a first slot portion 218, a second slot portion 222, and
a third slot portion 226, each oriented substantially perpendicular
to the axis 18. The first slot portion 218 is disposed closer to
the cutting end 206, and the third slot portion 226 is disposed
closer to the cap end 202. The second slot portion 222 is disposed
between the first slot portion 218 and the third slot portion 226.
The third slot portion 226 includes an upper wall 227 that is
substantially parallel to the cap end 202. The upper wall 227 is
offset a distance B from the second slot portion 222. In the
illustrated embodiment, distance B is between less than half of an
axial height of the aperture 210. The upper wall 227 is located at
a maximum distance D of approximately 0.2 inches from the cap end
202. Alternatively, the upper wall 227 of the third slot portion
226 may be flush with the cap end 202 such that distance D is zero,
or the third slot portion 226 may extend through a cap (not shown)
coupled to the cap end 202.
A first connecting slot portion 230 connects the first slot portion
218 and the second slot portion 222. The first connecting slot
portion 230 is oriented an angle .theta. relative to the cap end
202 and the cutting end 206. In the illustrated embodiment, the
angle .theta. is between approximately 50.2 degrees and
approximately 51.2 degrees, but other embodiments may include other
orientations.
A second connecting slot portion 234 connects the second slot
portion 222 and the third slot portion 226. The second connecting
slot portion 234 is oriented at an angle .alpha. relative to the
cap end 202 and the cutting end 206. In the illustrated embodiment,
the angle .alpha. is between approximately 31.3 degrees and
approximately 32.3 degrees, but other embodiments may include other
angle ranges.
FIG. 12 illustrates yet another embodiment of a hole saw 238. The
hole saw 238 has substantial similarities to the hole saw 10
described with respect to FIGS. 1-4, and only those aspects that
differ from the embodiments of FIGS. 1-4 will be described
herein.
As shown in FIG. 12, the hole saw 238 includes a cylindrical body
242 having a side wall 246 extending between a cap end 250 and a
cutting end 254. A pair of elongated apertures 258 are defined
within the side wall 246. Each elongated aperture 258 is defined by
a first slot portion 262 and a second slot portion 266, each
orientated substantially perpendicular to the axis 18. The first
slot portion 262 is circumferentially disposed closer to the
cutting end 254, and the second slot portion 266 is disposed closer
to the cap end 250, whereby the first slot portion 262 is offset
relative to the second slot portion 266. A connecting slot portion
270 connects the first slot portion 262 and the second slot portion
266. The connecting slot portion 270 is oriented at an angle
.infin. relative to the cap end 250 and the cutting end 254. In the
illustrated embodiment, the angle .infin. is between approximately
50.3 degrees and approximately 51.3 degrees, but other embodiments
may include other angle ranges. The first slot portion 262, the
second slot portion 266, and the connecting slot portion 270 all
have substantially the same width 274. The second slot portion 266
includes an upper wall 278 that is substantially parallel to the
cap end 250 and is located at a maximum distance D of approximately
0.2 inches from the cap end 250. Alternatively, the upper wall 278
of the second slot portion 266 may be oriented flush with the cap
end 250 such that distance D is zero, or the second slot portion
266 may extend through a cap (not shown) coupled to the cap end
250. The apertures 258 are configured to receive a tool (not shown)
for removing plugs from within the cylindrical body 242.
FIG. 13 illustrates yet another embodiment of a hole saw 278. The
hole saw 278 has substantial similarities to the hole saw 10
described with respect to FIGS. 1-4, and only those aspects that
differ from the embodiments of FIGS. 1-4 will be described
herein.
As shown in FIG. 13, the hole saw 278 includes a cylindrical body
282 having a side wall 286 extending between a cap end 290 and a
cutting end 294. A pair of elongated apertures 298 are defined
within the side wall 286. Each elongated aperture 298 is defined by
a first slot portion 302 and a second slot portion 306. The first
slot portion 302 is disposed closer to the cutting end 294, and the
second slot portion 306 is disposed closer to the cap end 290. The
second slot portion 306 includes an upper wall 310 orientated
substantially parallel to the cap end 290, and a radial wall 314
extends from the upper wall 310. The upper wall 310 is located at a
maximum distance D of approximately 0.2 inches from the cap end
290. Alternatively, the upper wall 310 of the second slot portion
306 may be oriented flush with the cap end 290 such that distance D
is zero, or the second slot portion 306 may extend through a cap
(not shown) coupled to the cap end 290.
Referring to FIG. 13, the first slot portion 302 includes an upper
wall 318 and a lower wall 322, each oriented substantially
perpendicular to the axis 18. A connecting slot portion 326
connects the first slot portion 302 and the second slot portion 306
and includes a first wall 330 and a second wall 334. The radial
wall 314 connects to the first wall 330, which connects to the
lower wall 322. The second wall 334 extends between the upper wall
310 and the upper wall 318. The first wall 330 is oriented at an
angle .OMEGA. relative to the cap end 290 and the cutting end 294.
In the illustrated embodiment, the angle .OMEGA. is between
approximately 69.5 degrees and approximately 70.5 degrees, but
other embodiments may include other angle ranges. The second wall
334 is oriented at an angle .mu. relative to the cap end 290 and
the cutting end 294. In the illustrated embodiment, the angle .mu.
is between approximately 50.1 degrees and approximately 51.1
degrees, but other embodiments may include other angle ranges.
FIG. 14 illustrates yet another embodiment of a hole saw 338. The
hole saw 338 has substantial similarities to the hole saws 10 and
156 described with respect to FIGS. 1-4 and 10, and only those
aspects that differ from the embodiments of FIGS. 1-4 and 10 will
be described herein.
As shown in FIG. 14, the hole saw 338 includes a cylindrical body
342 having a side wall 346 extending between a cap end 350 and a
cutting end 354. The side wall 346 includes a first pair of
elongated apertures 358 and a second pair of elongated apertures
362. The first pair of elongated apertures 358 are disposed closer
to the cap end 350, and the second pair of elongated apertures 362
are disposed closer to the cutting end 354. Each of the first pair
of apertures 358 includes a first slot portion 366 and second slot
portion 370.
The first slot portion 366 is oriented substantially perpendicular
to the axis 18. The second slot portion 370 extends from the first
slot portion 366 and is oriented at an angle .omega. relative to
the cap end 350 and the cutting end 354. In the illustrated
embodiment, the angle .omega. is between approximately 69.5 degrees
and approximately 70.5 degrees, but other embodiments may include
other angle ranges. The second slot portion 370 includes an upper
wall 374 that is substantially parallel to the cap end 350. The
upper wall 374 is offset a distance B from the lower slot portion
366. In the illustrated embodiment, distance B is less than half of
an axial height of the aperture 358. The upper wall 374 is located
at a maximum distance D of approximately 0.2 inches from the cap
end 350. Alternatively, the upper wall 374 of the second slot
portion 370 may be flush with the cap end 350 such that distance D
is zero, or the second slot portion 370 may extend through a cap
(not shown) coupled to the cap end 350. The first slot portion 366
and the second slot portion 370 have substantially the same width
378.
Each of the second pair of apertures 362 is defined by a first slot
portion 382 oriented substantially perpendicular to the axis 18.
The first pair of apertures 358 and the second pair of apertures
362 are generally aligned in the same position and orientation
relative to the axis 18, though in other embodiments they may be
staggered or in other orientations.
FIG. 15 illustrates yet another embodiment of a hole saw 386. The
hole saw 386 has substantial similarities to the hole saw 10
described with respect to FIGS. 1-4, and only those aspects that
differ from the embodiments of FIGS. 1-4 will be described
herein.
As shown in FIG. 15, the hole saw 386 includes a cylindrical body
390 having a side wall 394 extending between a cap end 398 and a
cutting end 402. A pair of elongated apertures 410 are defined
within the side wall 394. Each elongated aperture 410 is defined by
a first slot portion 414 and a second slot portion 418, each
orientated substantially perpendicular to the axis 18. The first
slot portion 414 is disposed closer to the cutting end 402, and the
second slot portion 418 is disposed closer to the cap end 398. A
connecting slot portion 422 connects the first slot portion 414 and
the second slot portion 418 and is oriented at an angle .alpha.
relative to the cap end 398 and the cutting end 402. In the
illustrated embodiment, the angle .alpha. is between approximately
60 degrees and approximately 80 degrees, more specifically
approximately 70 degrees, but other embodiments may include other
angles. The connecting slot portion 422 includes a first wall 423
and second wall 424. The elongated aperture 410 has a
circumferential width A, measured in a direction parallel to the
cap end 398 and cutting end 402. In the illustrated embodiment, the
circumferential width A is between approximately 1.250 inches and
approximately 2.150 inches, more specifically between approximately
1.475 inches and approximately 1.925 inches, and even more
specifically, approximately 1.700 inches. A circumferential width A
within these ranges provides for greater access to a user when
removing a work piece plug from the hole saw 386.
The second slot portion 418 includes an upper wall 426 orientated
substantially perpendicular to the axis 18, a lower wall 427
oriented substantially perpendicular to the axis 18, a side wall
428, and a radial wall 430 that extends from the upper wall 426.
The radial wall 430 connects to the first wall 423, which connects
to the lower wall 438. The second wall 424 connects to the lower
wall 427, which connects to the side wall 428. The upper wall 426
and lower wall 427 are axially separated by a slot height B. In the
illustrated embodiment, the slot height B is between approximately
0.018 inches and approximately 0.038 inches, more specifically
approximately 0.028 inches. Having slot height B within this range
of values provides for optimal removal of deep work piece plugs
within the hole saw 386.
A slot width C of the second slot portion 418, measured in a
direction parallel to the cap end 398, is between approximately
0.305 inches and approximately 0.805 inches, more specifically,
between approximately 0.430 inches and approximately 0.680 inches,
and even more specifically, approximately 0.555 inches. A slot
width C within these ranges of values allows for a greater range of
tools to be inserted into the slot in order to remove a work piece
plug. The upper wall 426 is located at a maximum distance D of
approximately 0.2 inches from the cap end 398. The upper wall 426
is located an axial offset E from a depth 432 of an axially
extending portion of a cap (e.g., the axially extending portion 74
of the cap 66 described with respect to FIG. 2). In the illustrated
embodiment, the axial offset E is between approximately 0.051
inches and approximately 0.126 inches, more specifically between
approximately 0.072 inches and approximately 0.108 inches, and even
more specifically, approximately 0.090 inches. Having an axial
offset E within this range of values provides for easier removal of
deep work piece plugs from within hole saw 386. Alternatively, the
upper wall 426 of the second slot portion 418 may be oriented flush
with the cap end 398 such that distance D is zero, or the second
slot portion 418 may extend through a cap (not shown) coupled to
the cap end 398.
The first slot portion 414 includes an upper wall 434 and a lower
wall 438, each oriented substantially perpendicular to the axis 18.
The upper wall 434 is disposed a distance F from the cutting end
402. In the illustrated embodiment, distance F is between
approximately 0.541 inches and approximately 0.895 inches, more
specifically between approximately 0.627 inches and approximately
0.809 inches, and even more specifically, approximately 0.718
inches. Having distance F within this range of values allows a user
to apply more axially-aligned force when removing a plug from the
hole saw 386. Each aperture 410 is configured to receive a tool
(not shown) for removing work piece plugs from within the
cylindrical body 390.
FIG. 16 illustrates yet another embodiment of a hole saw 442. The
hole saw 442 has substantial similarities to the hole saw 10, 156,
and 338 described with respect to FIGS. 1-4, 10, and 14, and only
those aspects that differ from the embodiments of FIGS. 1-4, 10,
and 14 will be described herein.
As shown in FIG. 16, the hole saw 442 includes a cylindrical body
446 having a side wall 450 extending between a cap end 454 and a
cutting end 458. The cutting end 458 includes a plurality of
cutting teeth 462. The plurality of cutting teeth 462 may be coated
with an abrasive coating, e.g., diamond grit.
Elongated apertures 466 are defined within the side wall 450. Each
elongated aperture 466 is defined by a first slot portion 470 and a
second slot portion 474. The first slot portion 470 is oriented
substantially perpendicular to the axis 18. The second slot portion
474 connects to the first slot portion 470 and is oriented at an
angle .eta. relative to the cap end 454 and the cutting end 458. In
the illustrated embodiment, the angle .eta. is between
approximately 73.5 degrees and approximately 74.5 degrees, but
other embodiments may include other ranges. The first slot portion
470 and the second slot portion 474 have substantially the same
width 478. The second slot portion 474 includes an upper wall 482
that is substantially parallel to the cap end 454 and is located at
a maximum distance D of approximately 0.2 inches from the cap end
454. Alternatively, the upper wall 482 of the second slot portion
474 may be oriented flush with the cap end 454 such that distance D
is zero, or the second slot portion 474 may extend through a cap
(not shown) coupled to the cap end 454. Each aperture 466 is
configured to receive a tool (not shown) for removing work piece
plugs from within the cylindrical body 446.
FIG. 17 illustrates yet another embodiment of a hole saw 486. The
hole saw 486 has substantial similarities to the hole saws 10 and
386 described with respect to FIGS. 1-4 and 15, and only those
aspects that differ from the embodiments of FIGS. 1-4 and 15 will
be described herein.
As shown in FIG. 17, the hole saw 486 includes a cylindrical body
490 having a side wall 494 extending between a cap end 498 and a
cutting end 502. The cutting end 502 includes a plurality of
cutting teeth 506. The plurality of cutting teeth 506 may be coated
with an abrasive coating, e.g., diamond grit.
The side wall 494 defines a plurality of elongated apertures 510.
Each elongated aperture 510 is defined by a first slot portion 514
and a second slot portion 518, each orientated substantially
perpendicular to the axis 18. The first slot portion 514 is
disposed closer to the cutting end 502, and the second slot portion
518 is disposed closer to the cap end 498. A connecting slot
portion 522 connects the first slot portion 514 and the second slot
portion 518 and is oriented at an acute angle relative to the cap
end 498 and the cutting end 502. The connecting slot portion
includes a first wall 523 and second wall 524.
The second slot portion 518 includes an upper wall 526 orientated
substantially perpendicular to the axis 18, a lower wall 527
oriented substantially perpendicular to the axis 18, a side wall
528, and a radial wall 530 that extends from the upper wall 526. A
distance B defined between the upper wall 526 and the lower wall
527 is less than half of an axial height of the aperture 510. The
upper wall 526 is located at a maximum distance D of approximately
0.2 inches from the cap end 498. Alternatively, the upper wall 526
of the second slot portion 518 may be oriented flush with the cap
end 498 such that distance D is zero, or the second slot portion
518 may extend through a cap (not shown) coupled to the cap end
498. The first slot portion 514 includes an upper wall 534 and a
lower wall 538, each oriented substantially perpendicular to the
axis 18. The radial wall 530 connects to the first wall 523, which
connects to the lower wall 538. The second wall 524 connects to the
lower wall 527, which connects to the side wall 528. Each aperture
510 is configured to receive a tool (not shown) for removing work
piece plugs from within the cylindrical body 490.
FIG. 18 illustrates yet another embodiment of a hole saw 542. The
hole saw 542 has substantial similarities to the hole saw 10, 156,
338, and 442 described with respect to FIGS. 1-4, 10, 14 and 16,
and only those aspects that differ from the embodiments of FIGS.
1-4, 10, 14 and 16 will be described herein.
As shown in FIG. 18, the hole saw 542 includes a cylindrical body
546 having a side wall 550 extending between a cap end 554 and a
cutting end 558. The cutting end 558 includes a plurality of
cutting teeth 562. The plurality of cutting teeth 562 may be coated
with an abrasive coating, e.g., diamond grit.
Elongated apertures 566 are defined within the side wall 550. Each
aperture 566 is configured to receive a tool (not shown) for
removing work piece plugs from within the cylindrical body 446.
Each elongated aperture 566 is defined by a first slot portion 570
and a second slot portion 574. The elongated apertures 566 each
have a circumferential width A, measured in a direction parallel to
the cap end 554 and cutting end 558. In the illustrated embodiment,
the circumferential width A is between approximately 0.595 inches
and approximately 0.895 inches, more specifically between
approximately 0.670 inches and approximately 0.820 inches, and even
more specifically, approximately 0.745 inches. A circumferential
width A within these ranges provides for greater access to a user
when removing a work piece plug from the hole saw 542.
The first slot portion 570 is oriented substantially perpendicular
to the axis 18. The second slot portion 574 connects to the first
slot portion 570 and is oriented at an angle .kappa. relative to an
end wall 576 of the first slot portion 570, where the end wall 576
is oriented at approximately 15 degrees relative to the axis 18. In
the illustrated embodiment, the angle .kappa. is between
approximately 25.5 degrees and approximately 26.5 degrees, but
other embodiments may include other ranges.
A slot width C of the second slot portion 574, measured in a
direction parallel to the cap end 554, is between approximately
0.280 inches and approximately 0.480 inches, more specifically,
between approximately 0.330 inches and approximately 0.430 inches,
and even more specifically, approximately 0.380 inches. A slot
width C within these ranges of values allows for a greater range of
tools to be inserted into the slot in order to remove a work piece
plug.
The second slot portion 574 includes an upper wall 582 that is
parallel to the cap end 554 and is located at a maximum distance D
of approximately 0.188 inches from the cap end 554. The upper wall
582 is located at an axial offset E from a depth 584 of an axially
extending portion of a cap (e.g., the axially extending portion 74
of the cap 66 described with respect to FIG. 2). In the illustrated
embodiment, the axial offset E is between approximately 0.010
inches and approximately 0.120 inches, more specifically between
approximately 0.030 inches and approximately 0.090 inches, and even
more specifically, approximately 0.050 inches. Having an axial
offset E within this range of values provides for easier removal of
deep work piece plugs from within hole saw 542. Alternatively, the
upper wall 582 of the second slot portion 574 may be oriented flush
with the cap end 554 such that distance D is zero, or the second
slot portion 574 may extend through a cap (not shown) coupled to
the cap end 554.
The first slot portion 570 includes an upper wall 588 and a lower
wall 592, each oriented substantially perpendicular to the axis 18.
The upper wall 588 is disposed a distance F from the cutting end
558. In the illustrated embodiment, distance F is between
approximately 0.050 inches and approximately 0.895 inches, more
specifically between approximately 0.670 inches and approximately
0.820 inches, and even more specifically, approximately 0.745
inches. Having distance F within these ranges of values allows a
user to apply more axially-aligned force when removing a plug from
the hole saw 542.
Although the invention has been described with reference to certain
preferred embodiments, variations and modifications exist within
the scope and spirit of one or more independent aspects of the
invention as described.
Thus, the invention provides, among other things, a hole saw.
Various features and advantages of the invention are set forth in
the following claims.
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