U.S. patent application number 10/253314 was filed with the patent office on 2003-02-06 for method of making a saw blade.
Invention is credited to Phillips, Gregory A., Schmidt, Manfred W., Ward, Kevin M..
Application Number | 20030024354 10/253314 |
Document ID | / |
Family ID | 24935174 |
Filed Date | 2003-02-06 |
United States Patent
Application |
20030024354 |
Kind Code |
A1 |
Ward, Kevin M. ; et
al. |
February 6, 2003 |
Method of making a saw blade
Abstract
A method of making a saw blade includes the step of providing a
metallic blade body that defines a first side surface and a second
side surface. The method further includes the step of providing the
metallic material blade body with cutting teeth at an edge thereof.
The method also includes the step of forming a plurality of
discrete dimples on at least one of the side surfaces. The forming
step includes the step of deforming the metallic blade body with
pins on a die plate of a punch press so as to create a plurality of
indentations in the side surface in which the dimples are
formed.
Inventors: |
Ward, Kevin M.; (Louisville,
KY) ; Phillips, Gregory A.; (LaGrange, KY) ;
Schmidt, Manfred W.; (Louisville, KY) |
Correspondence
Address: |
Paul J. Maginot
Maginot, Moore & Bowman
Bank One Center/Tower
111 Monument Circle, Suite 3000
Indianapolis
IN
46204-5115
US
|
Family ID: |
24935174 |
Appl. No.: |
10/253314 |
Filed: |
September 24, 2002 |
Related U.S. Patent Documents
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Application
Number |
Filing Date |
Patent Number |
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10253314 |
Sep 24, 2002 |
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09705403 |
Nov 3, 2000 |
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09705403 |
Nov 3, 2000 |
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09136676 |
Aug 19, 1998 |
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6145426 |
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09136676 |
Aug 19, 1998 |
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08730398 |
Oct 15, 1996 |
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5802947 |
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Current U.S.
Class: |
76/58 ;
76/112 |
Current CPC
Class: |
B23D 61/123 20130101;
Y10T 83/9319 20150401; B23D 61/025 20130101; Y10T 83/9372
20150401 |
Class at
Publication: |
76/58 ;
76/112 |
International
Class: |
B23D 063/04; B23D
063/00 |
Claims
What is claimed is:
1. A method of making a saw blade, comprising the steps of:
providing a metallic blade body that defines a first side surface
and a second side surface, providing said metallic blade body with
cutting teeth at an edge thereof; and forming a plurality of
discrete dimples on at least one of said side surfaces, said
forming step including the step of deforming said metallic blade
body with pins on a die plate of a punch press so as to create a
plurality of indentations in said side surface in which said
dimples are formed.
2. The method of claim 1, further comprising the step of
configuring said metallic blade body to form any one of the
following group: a jig saw blade, a saber saw blade, a hack saw
blade, a bow saw blade, a hand saw blade, a bone saw blade, a
pruning saw blade, a keyhole saw blade, a miter saw blade, and a
band saw blade.
3. The method of claim 1, wherein said forming step includes the
step of configuring each of said plurality of dimples to define a
perimeter which is spaced apart from all edges of said metallic
blade body.
4. The method of claim 3, wherein said forming step further
includes the step of configuring each of said plurality of dimples
to include a ridge which is located at said perimeter.
5. The method of claim 4, wherein said forming step further
includes the step of configuring at least a portion of said ridge
to extend above said side surface of said metallic blade body in
which said dimples are formed.
6. A method of making a saw blade, comprising the steps of:
providing a blade body which defines a side surface; providing said
blade body with cutting teeth; and deforming said blade body with
pins on a die plate of a punch press so as to create a plurality of
dimples in said side surface.
7. The method of claim 6, further comprising the step of
configuring said blade body to form any one of the following group:
a jig saw blade, a saber saw blade, a hack saw blade, a bow saw
blade, a hand saw blade, a bone saw blade, a pruning saw blade, a
keyhole saw blade, a miter saw blade, and a band saw blade.
8. The method of claim 6, wherein said deforming step includes the
step of configuring each of said plurality of dimples to define a
perimeter which is spaced apart from all edges of said blade
body.
9. The method of claim 8, wherein said deforming step further
includes the step of configuring each of said plurality of dimples
to include a ridge which is located at said perimeter.
10. The method of claim 9, wherein said deforming step further
includes the step of configuring at least a portion of said ridge
to extend above said side surface of said blade body.
11. The method of claim 6, wherein said blade body is made of
metal.
12. A method of making a saw blade, comprising the steps of:
providing a metallic blade body which defines a first side surface
and a second side surface; and providing said metallic blade body
with cutting teeth at an edge thereof; and deforming both said
first side surface and said second side surface with pins on a die
plate of a punch press so as to create a plurality of dimples in
each said first side surface and said second side surface.
13. The method of claim 12, further comprising the step of
configuring said metallic blade body to form any one of the
following group: a jig saw blade, a saber saw blade, a hack saw
blade, a bow saw blade, a hand saw blade, a bone saw blade, a
pruning saw blade, a keyhole saw blade, a miter saw blade, and a
band saw blade.
14. The method of claim 12, wherein said deforming step includes
the step of configuring each of said plurality of dimples to define
a perimeter which is spaced apart from all edges of said metallic
blade body.
15. The method of claim 14, wherein said deforming step further
includes the step of configuring each of said plurality of dimples
to include a ridge which is located at said perimeter.
16. The method of claim 15, wherein said deforming step further
includes the step of configuring at least a portion of said ridge
to extend above said side surface of said metallic blade body.
Description
[0001] This application is a continuation of co-pending U.S.
application Ser. No. 09/705,403, filed on Nov. 3, 2000, which in
turn is a continuation of co-pending U.S. application Ser. No.
09/136,676, filed on Aug. 19, 1998 (now U.S. Pat. No. 6,145,426),
which in turn is a continuation-in-part of U.S. application Ser.
No. 08/730,398, filed on Oct. 15, 1996 (now U.S. Pat. No.
5,802,947).
[0002] In Application Serial No. 730,398, of which, this
application is a continuation-in-part dimpling of a circular saw
blade to produce discrete ridges raised from the plane of the blade
is described. The dimpling process produces a cold working effect
and the raised edges provide protection against overheating of the
blade and scorching of the workpiece when a planar side surface of
the blade comes into contact with a wall defining the kerf being
produced by the teeth of the blade. The present application is
directed to an extension of that principle and technique to linear
saw blades and other applications for which those principles and
techniques have utility.
[0003] Producing small, discrete, surfaces projecting from a planar
surface of jigsaw, hacksaw, or band saw blade, for example, is
counter-intuitive. Logically, clearance between the kerf produced
by the teeth of the blade, and the body of the blade behind the
teeth would be maximized. However, it is a matter of common
knowledge that the bodies of jigsaw hacksaw or band saw blades
frequently come into contact: with the walls defining the kerf of a
workpiece. The provision of low-profile projections from such a
blade reduces the surface of contact with the kerf wall.
BRIEF SUMMARY OF THE INVENTION
[0004] In accordance with this invention, generally stated,
low-profile, discrete protrusions are provided on the blade behind
the teeth or cutting edge of a tool, in the form of ridges on the
perimeters of indentations (concave dimples) or surfaces on the
tops of domes (convex dimples). Preferably, the dimples are on both
sides of the blade, although for some applications, protrusions on
only one side may be desired. The dimples can be concave on one
side and convex on the other, the same punching process forming
both, or concave or convex dimples can be formed on both sides.
Concave dimples with ridges at their perimeter can be formed in one
or both sides, and convex dimples, without a corresponding concave
dimple with a ridge, can be formed in one or both sides. The
dimples can be of any perimetric configuration, i.e. circular,
teardrop shaped, star shaped, polygonal, or even irregularly
shaped, for example.
[0005] The dimples should be discrete, spaced from one another, and
projecting on the order of 0.005 inches from a planar surface of
the blade, although the dimensions of the dimples and their
projection from the surface can vary with the application to which
they are put.
[0006] The arrangement of the dimples can also be varied. For
example, on a jigsaw blade, the narrowness of the blade dictates
that the dimples be small and in either a linear or slightly
staggered configuration. In a saber saw, band saw or hack saw, the
width of the blade will permit a wider variety of pattern, or
random distribution of dimples. In a hole saw, pruning saw, hand
saw, or bow saw, for example, the patterns can be somewhat more
open because of the greater width of the blade.
BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
[0007] In the drawings, FIG. 1 is a view in side elevation of a
saber saw blade in which, by way of illustration, dimples of
various types and sizes are shown;
[0008] FIG. 2 is a fragmentary sectional view of a blade showing
concave dimples formed directly opposite one another on opposite
flat side surfaces of the blade, each with a ridge on its
perimeter;
[0009] FIG. 3 is a fragmentary sectional view of a blade showing
concave dimples formed on opposite sides but staggered with respect
to one another, each with a ridge on its perimeter;
[0010] FIG. 4 is a fragmentary sectional view taken along the line
4-4 of FIG. 1;
[0011] FIG. 5 is a fragmentary sectional view of a blade in which
ridged concave dimples are provided on one side, and convex
dimples, on the other side;
[0012] FIG. 6 is a fragmentary sectional view of a diamond shaped
concave dimple taken along the line 6-6 of FIG. 1;
[0013] FIG. 7 is a view in side elevation of a jigsaw blade in
which a row of dimples has been formed;
[0014] FIG. 8 is a view in side elevation of a small saber saw
blade in which dimples of various sizes and configurations have
been formed;
[0015] FIG. 9 is a bottom edge view of the saw blade shown in FIG.
7, showing the staggered teeth;
[0016] FIG. 10 is fragmentary view in side elevation of a hack or
band saw blade with dimples of various sizes and shapes in a random
pattern;
[0017] FIG. 11 is a view in perspective of a hole saw in which
dimples have been formed; and;
[0018] FIG. 12 is a top plan view of a strip used to form the blade
of the hole saw of FIG. 11, before it is curled and welded.
[0019] Corresponding reference numerals will be used throughout the
several figures of the drawings.
DETAILED DESCRIPTION OF THE INVENTION
[0020] The following detailed description illustrates the invention
by way of example and not by way of limitation. This description
will clearly enable one skilled in the art to make and use the
invention, and describes several embodiments, adaptations,
variations, alternatives and uses of the invention, including what
we presently believe is the best mode of carrying out the
invention.
[0021] Referring to FIG. 1 of the drawings, reference numeral 1
indicates a saber saw blade with a flat sided body 2 and teeth 3
along a narrow edge of the body. Merely by way of illustration, the
body of the blade 1 is shown as having formed in it a number of
different types of dimples, although normally only one type of
dimple would be used on any one blade, spread along the length of
the blade. FIG. 2 is an illustrative example of some of the dimples
in the blade of FIG. 1, wherein concave dimples 4 with ridges 5
along their perimeters are shown as being positioned directly
opposite one another on two flat sides of the blade In FIG. 3, the
dimples are shown as being staggered with respect to one another on
opposite sides of the blade. FIG. 4, which is a fragmentary
sectional view taken along the line 4-4, illustrates concave
dimples 7 without ridges, with complementary convex dimples 8, with
an outermost smooth domed surface 9, alternately on one side and
the other. FIG. 5 illustrates a concave dimple 4, with a ridge 5,
on one side and a complementary convex dimple 8, with an outermost
smooth surface 9. FIG. 6 is a fragmentary sectional view taken
along the line 6-6 of FIG. 1, showing a diamond shaped concave
dimple 14 with a ridge 15 at its perimeter. Reference numeral 17
indicates teardrop shaped dimples, which can be either concave or
convex.
[0022] Referring to FIG. 7, reference numeral 20 indicates a jig
saw blade, with a body 21 and teeth 22. Dimples 23 in the body 21
can be of the types shown in FIGS. 2 and 3 or of the types shown in
FIGS. 4 and 5. Because the body 21 is so narrow, the dimples 23 are
shown as arranged in a straight line.
[0023] In FIG. 8, a different type of saber saw is illustrated, in
which dimples of various shapes and sizes are arranged in a more or
less random pattern.
[0024] FIG. 9 illustrates the teeth of saws provided with dimples,
and in particular the jig saw blade of FIG. 7. The teeth are
staggered in such a way as to produce a kerf at least slightly
wider than the protrusion of the dimples, so that normally the
protrusions, whether they be convex domes or ridges, do not engage
the walls defining the kerf.
[0025] FIG. 10 illustrates a band or hack saw blade 24, which,
merely for purposes of illustration, is shown with dimples 25 of
various sizes. The dimples on the left part of the blade are shown
as arranged in a regular pattern, which would normally be the case.
The dimples on the right side of the illustration are shown as of
various sizes and shapes, arranged in a more or less random
pattern, merely to illustrate that possibility.
[0026] FIG. 11 shows a hole saw 26 with a circular top 30 and a
cylindrical blade 28 with a body 29 along a free edge of which
teeth 31 extend. Dimples 32, in the embodiment shown, are convex on
the exterior surface of the blade body 29. Although they are not
illustrated, the dimples 32 can have counterpart concave dimples on
the inner surface of the cylindrical blade body, which can be of
the type shown in FIG. 5, to provide protrusions on the inner
surface, as well as on the outer, or the hole saw can be provided
with any of the other types of dimples that have been illustrated
or described.
[0027] FIG. 12 illustrates the blade 28 of the hole saw 26 as it is
made before it is curled and welded at its free ends to form a
cylinder as indicated in FIG. 11. This simplifies the formation of
the dimples 32.
[0028] It will be apparent to those skilled in the art that the
dimpling can be applied to a wide variety of tools beyond those
specifically illustrated, as has been indicated heretofore. In a
toothless blade, particularly a food slicing blade, the dimples are
preferably made entirely convex, or, if complementary concave
dimples are formed in the process of producing the convex dimples,
at least making the complementary concave dimples without ridges,
to make cleaning easier. Preferably, in every case, the dimples are
formed with a punch press, which gives the benefit of the
cold-working described in application serial number 730,398. Pins,
set in a die plate, can be used to form the concave dimples, and if
convex dimples are to be formed, to form the concave dimples on one
side and complementary convex dimples on the other at the same
time. It is possible to form the dimples in a rolling process
either in the course of manufacturing stock of which the blades are
made, or subsequently. The dimples can be produced on only one side
of a blade that is expected to be used in such a way that only one
side is likely to come into contact with a kerf wall. Numerous
other variations in the tools of this invention and the method of
their manufacture within the scope of the appended claims will
become apparent to those skilled in the art in the light of the
foregoing disclosure.
[0029] As various changes could be made in the above constructions
without departing from the scope of the invention, it is intended
that all matter contained in the above description or shown in the
accompanying drawings shall be interpreted as illustrative and not
in a limiting sense.
* * * * *