U.S. patent application number 11/171777 was filed with the patent office on 2007-01-04 for twist bit for drilling mortar and for optimizing dissipation of heat and dust created by the drilling.
Invention is credited to Bruce D. Switzer.
Application Number | 20070000700 11/171777 |
Document ID | / |
Family ID | 37588143 |
Filed Date | 2007-01-04 |
United States Patent
Application |
20070000700 |
Kind Code |
A1 |
Switzer; Bruce D. |
January 4, 2007 |
Twist bit for drilling mortar and for optimizing dissipation of
heat and dust created by the drilling
Abstract
A twist bit for drilling mortar and for optimizing dissipation
of heat and dust created by the drilling. A shaft has a flute
therein configured in a spiral configuration therealong leaving a
flute land thereon also configured in a spiral configuration
therealong, a tip, and a head including the tip and a portion of
the flute land coextensive with the tip. Diamond dust is disposed
only on the flute land and the head. To optimize the dissipation of
the heat and the dust created by the drilling, the twist drill
operates via a drill motor in a range of approximately 25,000 RPMs
to approximately 26,000 RPMs. The flute has a width of
approximately 1/4'' and the flute land has a width of approximately
1/4'' and a height of approximately 1/16''.
Inventors: |
Switzer; Bruce D.; (McAfee,
NJ) |
Correspondence
Address: |
Richard L. Miller
12 Parkside Drive
Dix Hills
NY
11746-4879
US
|
Family ID: |
37588143 |
Appl. No.: |
11/171777 |
Filed: |
June 30, 2005 |
Current U.S.
Class: |
175/394 |
Current CPC
Class: |
B28D 1/146 20130101;
B23B 2270/56 20130101; B23B 51/02 20130101; B23B 2251/44 20130101;
B23B 2226/75 20130101; B23B 2251/406 20130101; B23B 2226/315
20130101 |
Class at
Publication: |
175/394 |
International
Class: |
E21B 10/44 20060101
E21B010/44 |
Claims
1. A twist bit for drilling mortar and for optimizing dissipation
of heat and dust created by the drilling, comprising: a) a shaft;
and b) diamond dust; wherein said diamond dust is disposed on said
shaft.
2. The bit as defined in claim 1, wherein said shaft has a flute
therein.
3. The bit as defined in claim 2, wherein said flute in said shaft
is configured in a spiral configuration therealong so as to leave a
flute land thereon that is also configured in a spiral
configuration therealong.
4. The bit as defined in claim 3, wherein said shaft has a tip.
5. The bit as defined in claim 4, wherein said flute land of said
shaft extends therealong up to, and is coextensive with, said tip
of said shaft so as to form a head.
6. The bit as defined in claim 5, wherein said head of said shaft
includes said tip of said shaft and a portion of said flute land of
said shaft that is coextensive with said tip of said shaft.
7. The bit as defined in claim 4, wherein said tip of said shaft is
pointed.
8. The bit as defined in claim 5, wherein said diamond dust is
disposed only on said flute land of said shaft and said head of
said shaft.
9. The bit as defined in claim 3, wherein said flute in said shaft
has a width; wherein said flute land of said shaft has a width;
wherein said flute land of said shaft has a height; and wherein
said twist bit operates via a drill motor in a range of
approximately 25,000 RPMs to approximately 26,000 RPMs, said width
of said flute in said shaft is approximately 1/4'', said width of
said flute land of said shaft is approximately 1/4'', and said
height of said flute land of said shaft is approximately 1/16'',
all for optimizing the dissipation of the heat and the dust from a
hole in mortar created by the drilling.
Description
BACKGROUND OF THE INVENTION
[0001] 1. Field of the Invention:
[0002] The present invention relates to a twist bit for drilling
mortar, a and more particularly, the present invention relates to a
twist bit for drilling mortar and for optimizing dissipation of
heat and dust created by the drilling.
[0003] 2. Description of the Prior Art:
[0004] Numerous innovations for drill bits have been provided in
the prior art that will be described. Even though these innovations
may be suitable for the specific individual purposes to which they
address, however, they differ from the present invention.
[0005] A FIRST EXAMPLE, U.S. Pat. No. 3,692,127, Issued on Sep. 19,
1972, to Hampe et al. teaches an improved rotary diamond core bit
offering longer life in dry and in chip flush drilling. Grade AAAA
dodecahedron diamonds within the range of 18 to 22 diamonds per
carat size, each having a select rectangular pyramid point region
free of internal flaws and with an included angle of 100 degrees to
120 degrees, are anchored in a bit matrix to project such select
point regions outwardly a distance of 0.015.+-.0.003 inch from a
semi-round angular bit face in hard-vector face-set orientation in
the rotary cutting direction of the bit and with a negative rake
angle of nominally 41/2 degrees. Such bit-face diamonds are
arranged in circumferentially spaced-apart rows extending radially
outward and backward with respect to rotary motion of the bit. Such
"snow-plow" linear arrays of bit-face diamonds are disposed on
respective discrete similarly snow-plow-oriented land areas or
cutting segments of the annular bit face, and chip release face
grooves extend from inner to outer diameter of the annular bit face
between all cutting segments. The diamonds on the annular segmented
cutting face are arranged with the tips of their projecting cutting
portions at equal radial intervals of 0.010.+-.0.001 inch along
concentric line circles. Thirty-seven line circles cover the full
annular segmented bit face region, and two diamonds are employed in
all but the innermost and outermost line circles, which each have
four. Axially extending chip release grooves at the inner and outer
diameters of the bit register with opposite ends of the bit-face
grooves, and axially extending rows of reaming diamonds continue
from opposite ends of the rows of bit-face diamonds. A curvature of
0.050.+-.0.005 inch at the intersection of each cutting segment
surface and the inner and outer diameter portions of the bit enable
proper non-girth-exposing anchoring and the 0.015 inch projection
of the diamonds in the transition region between the bit-face
diamonds and the reaming diamonds at the interior and exterior
surfaces of the bit. The axially extending chip release grooves in
the outer diameter portion of the bit feed into auger grooves
formed in a continuing shank portion of the bit for dry or wet chip
removal.
[0006] A SECOND EXAMPLE, U.S. Pat. No. 3,736,995, Issued on Jun. 5,
1973, to Salter teaches a masonry core drilling bit for cutting
through cast concrete into preplaced utility conduit cells beneath
the surface. The bit has two concentric, axially offset, end
cutting faces on a unitary cutter head arranged at the end of a
hollow shank for simultaneously cutting through concrete and
through the metal cover of the embedded cell while, at the same
time, providing an enlarged hole in the concrete to accept an
insert for a utility outlet. The cutter head of the bit contains 5
to 60 volume per cent uniformly dispersed diamonds in a matrix of
substantially pure iron powder, or an iron powder containing 20-80
vol. percent WC, infiltrated during fabrication with a relatively
low-melting alloy. Spaced diamonds are provided along the internal
and exterior cylindrical surfaces of the cutter head of the
bit.
[0007] A THIRD EXAMPLE, U.S. Pat. No. 5,022,801, Issued on Jun. 11,
1991, to Anthony et al. teaches a twist drill which is coated with
a layer of CVD diamond and which has slots in its head which are
filled with CVD diamond. The invention twist drill is made by
forming slots in the head of the twist drill and then subjecting
the slotted twist drill to a CVD diamond deposition process for
coating the twist drill with a layer of CVD diamond and for filling
the slots with CVD diamond. The performance of CVD diamond-coated
twist drills does not depend on retaining the diamond film over
most of the areas of the drill; but, rather, drill performance is
dependent upon retaining a layer of diamond on the cutting edge of
the drill. The diamond-filled slots in the head of the twist drill
function as wear stops and additional cutting edges as the
surrounding drill material is worn away during use.
[0008] A FOURTH EXAMPLE, U.S. Pat. No. 5,716,170, Issued on Feb.
10, 1998, to Kammermeier et al. teaches a diamond coated elongate
rotary cutting member and method of making the same. The cutting
member includes an axially forward cutting surface, a flute and a
fluted land. The cutting member comprises a substrate with hard
grains bonded together with a metallic binder. The substrate has a
first substrate region that presents an irregular surface so as to
define the axially forward cutting surface and the fluted land. The
first substrate region contains relatively large hard grains near
the surface thereof that are larger in size than the hard grains in
the interior of the substrate. A diamond coating is on the surface
of the first substrate region. The substrate has a second substrate
region that defines the flute.
[0009] A FIFTH EXAMPLE, U.S. Pat. No. 6,196,908 B1, Issued on Mar.
6, 2001, to Adams teaches a diamond coated drill capable of
drilling large holes in composite materials and then reaming the
holes to their correct size that includes a pair of prongs
extending from a shank. Each of the prongs has a tip, a grinder,
and a reamer. The tips initiate a hole, the grinders gradually
grind the hole to the proper size, and the reamers control the
final diameter of the hole. The tips have a coarse grit diamond
coating. The grinders also have a coarse grit diamond coating and
are axially tapered toward the tips. The reamers have a fine grit
diamond coating and are disposed axially above the grinders and the
shank of the drill. The grinders apply a radial load to the
composite material resulting in no fiber breakout or splintering.
The composite material drilled by the drill naturally falls out of
the drill during drilling.
[0010] It is apparent that numerous innovations for drill bits have
been provided in the prior art that are adapted to be used.
Furthermore, even though these innovations may be suitable for the
specific individual purposes to which they address, however, they
would not be suitable for the purposes of the present invention as
heretofore described.
SUMMARY OF THE INVENTION
[0011] ACCORDINGLY, AN OBJECT of the present invention is to
provide a twist bit for drilling mortar and for optimizing
dissipation of heat and dust created by the drilling that avoids
the disadvantages of the prior art.
[0012] ANOTHER OBJECT of the present invention is to provide a
twist bit for drilling mortar and for optimizing dissipation of
heat and dust created by the drilling that is simple to use.
[0013] BRIEFLY STATED, STILL ANOTHER OBJECT of the present
invention is to provide a twist bit for drilling mortar and for
optimizing dissipation of heat and dust created by the drilling. A
shaft has a flute therein configured in a spiral configuration
therealong leaving a flute land thereon also configured in a spiral
configuration therealong, a tip, and a head including the tip and a
portion of the flute land coextensive with the tip. Diamond dust is
disposed only on the flute land and the head. To optimize the
dissipation of the heat and the dust from a hole created by the
drilling, the twist bit operates via a drill motor in a range of
approximately 25,000 RPMB to approximately 26,000 RPMs. The flute
has a width of approximately 1/4'' and the flute land has a width
of approximately 1/4'' and a height of approximately 1/16''.
[0014] The novel features which are considered characteristic of
the present invention are set forth in the appended claims. The
invention itself, however, both as to its construction and its
method of operation, together with additional objects and
advantages thereof, will be best understood from the following
description of the specific embodiments when read and understood in
connection with the accompanying drawing.
BRIEF DESCRIPTION OF THE DRAWING
[0015] The figures of the drawing are briefly described as
follows:
[0016] FIG. 1 is a diagrammatic cross sectional view through the
mortar showing of the twist bit of the present invention drilling
an axial hole in the mortar and optimizing dissipation of heat and
dust created by the drilling;
[0017] FIG. 2 is a diagrammatic cross sectional view through the
mortar showing the twist bit of the present invention drilling a
lateral hole in the mortar and optimizing dissipation of heat and
dust created by the drilling;
[0018] FIG. 3 is a diagrammatic side elevational view of the twist
bit of the present invention identified by ARROW 3 in FIGS. 1 and
2; and
[0019] FIG. 4 is an enlarged diagrammatic cross sectional view
taken along LINE 4-4 in FIG. 3.
LIST OF REFERENCE NUMERALS UTILIZED IN THE DRAWING
[0020] 10 twist bit of present invention for drilling mortar 12 and
for optimizing dissipation of heat 14 and dust 16 created by
drilling [0021] 11 hole in mortar [0022] 12 mortar [0023] 13 drill
motor for rotating twist bit 10 [0024] 14 heat from hole 11 [0025]
16 dust form hole 11 [0026] 18 shaft of twist bit 10 [0027] 20
diamond dust of the twist bit 10 [0028] 22 flute in shaft 18 [0029]
24 flute land of shaft 18 [0030] 26 tip of shaft 18 [0031] 28 head
of shaft 18
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
[0032] Referring now to the figures, in which like numerals
indicate like parts, and particularly to FIGS. 1 and 2, which are,
respectively, a diagrammatic cross sectional view through the
mortar showing the twist bit of the present invention drilling an
axial hole in the mortar and optimizing dissipation of heat and
dust created by the drilling, and, a diagrammatic cross sectional
view through the mortar showing the twist bit of the present
invention drilling and cutting a lateral hole in the mortar and
optimizing dissipation of heat and dust created by the drilling,
the twist bit of the present invention is shown generally at 10 for
drilling holes 11 in mortar 12 via a drill motor 13 and for
optimizing dissipation of heat 14 and dust 16 from the hole 11
created by the drilling.
[0033] The configuration of the twist bit 10 can best be seen in
FIGS. 3 and 4, which are, respectively, a diagrammatic side
elevational view of the twist bit of the present invention
identified by ARROW 3 in FIGS. 1 and 2, and, an enlarged
diagrammatic cross sectional view taken along LINE 4-4 in FIG. 3,
and as such, will be discussed with reference thereto.
[0034] The twist bit 10 comprises a shaft 18 and diamond dust 20.
The diamond dust 20 is disposed on the shaft 18. The shaft 18 has a
flute 22 therein.
[0035] The flute 22 in the shaft 18 is configured in a spiral
configuration therealong so as to leave a flute land 24 thereon
that is also configured in a spiral configuration therealong. The
shaft 18 further has a tip 26.
[0036] The flute land 24 of the shaft 18 extends therealong up to,
and is coextensive with, the tip 26 of the shaft 18 so as to form a
head 28. The head 28 of the shaft 18 includes the tip 26 of the
shaft 18 and a portion of the flute land 24 of the shaft 18 that is
coextensive with the tip 26 of the shaft 18.
[0037] The tip 26 of the shaft 18 is pointed.
[0038] The diamond dust 20 is disposed only on the flute land 24 of
the shaft 18 and the head 28 of the shaft 18.
[0039] The flute 22 in the shaft 18 has a width, and the flute land
24 of the shaft 18 has a width and a height.
[0040] To optimize the dissipation of the heat 14 and the dust 16
from the hole 11 created by the drilling, the twist bit 10 operates
via a drill motor 13 in a range of approximately 25,000 RPMs to
approximately 26,000 RPMs. The width of the flute 22 in the shaft
18 is approximately 1/4'', the width of the flute land 24 of the
shaft 18 is approximately 1/4'', and the height of the flute land
24 of the shaft 18 is approximately 1/16''.
[0041] It will be understood that each of the elements described
above, or two or more together, may also find a useful application
in other types of constructions differing from the types described
above.
[0042] While the invention has been illustrated and described as
embodied in a twist bit for drilling mortar and for optimizing
dissipation of heat and dust created by the drilling, however, it
is not limited to the details shown, since it will be understood
that various omissions, modifications, substitutions and changes in
the forms and details of the device illustrated and its operation
can be made by those skilled in the art without departing in any
way from the spirit of the present invention.
[0043] Without further analysis, the foregoing will so fully reveal
the gist of the present invention that others can, by applying
current knowledge, readily adapt it for various applications
without omitting features that, from the standpoint of prior art,
fairly constitute characteristics of the generic or specific
aspects of this invention.
* * * * *