CN1016949B - Masonry drill tip with strong and chamfered cutting edges - Google Patents
Masonry drill tip with strong and chamfered cutting edgesInfo
- Publication number
- CN1016949B CN1016949B CN88101340.4A CN88101340A CN1016949B CN 1016949 B CN1016949 B CN 1016949B CN 88101340 A CN88101340 A CN 88101340A CN 1016949 B CN1016949 B CN 1016949B
- Authority
- CN
- China
- Prior art keywords
- knife
- blade
- face
- chamfered edge
- edge
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 239000004575 stone Substances 0.000 claims abstract description 3
- 239000011449 brick Substances 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 10
- 238000005553 drilling Methods 0.000 abstract description 3
- 239000002245 particle Substances 0.000 description 12
- 230000001965 increasing effect Effects 0.000 description 5
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 230000006872 improvement Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241000221535 Pucciniales Species 0.000 description 1
- 208000034189 Sclerosis Diseases 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000010438 granite Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B51/00—Tools for drilling machines
- B23B51/02—Twist drills
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
- E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/58—Chisel-type inserts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2226/00—Materials of tools or workpieces not comprising a metal
- B23B2226/75—Stone, rock or concrete
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/14—Configuration of the cutting part, i.e. the main cutting edges
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23B—TURNING; BORING
- B23B2251/00—Details of tools for drilling machines
- B23B2251/50—Drilling tools comprising cutting inserts
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Drilling Tools (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Abstract
A cutting tip is specified which is carried by a drilling tool which rotates in a first direction and is used to drill holes in stones or masonry materials, the tip being planar and having a point which is defined by first and second faces, intersecting at one point, and third and fourth flank edges which run generally parallel to the longitudinal axis and in which the guide edge of at least one of the flank edges is bevelled or chamfered, seen in the direction of rotation.
Description
The invention relates to drill bit, particularly about a kind of cutting tip that is used on the masonry drill bit.This drill bit comprises the drilling rod of a trough of belt, is used to that blade is installed and can gets rid of the smear metal that produces when blade rotates.
In the prior art, masonry drill adopts pointed cutting tip as first.This cutting tip inserts a band spiral fluted axle top, the smear metal that the spiral fluted shaft is produced in the time of can getting rid of the blade rotation.
As previously mentioned, cutting is to utilize the rotation of blade to realize.In the prior art, direction of rotation is once selected, and cutting edge just is arranged on each side of blade chisel edge, and it is to utilize the definite blade rake face of direction of rotation and crossing and generation in the blade foremost that direction of feed is determined.A side edge that is parallel to drill bit feed axis is to be based upon on each side of point of a knife.It is to utilize the blade outermost surface of the peaceful cutter shaft line of advancing of a rake face of blade to intersect generation.And this cutting edge and crossing some the blade points of a knife that formed of this side edge in each side of chisel edge.This point of a knife is cutting and wearing and tearing beginning part, also is cutting and the rapidest part of wearing and tearing.When cutting, because friction, each side edge and cutting edge all produce wearing and tearing.
The drill bit of said structure is a known prior art, and is produced by U.S. Vermont company and many other companies.Known prior art drill bit comprises that one is purpose cutting edge chamfered edge in order to the drag that increases whole cutting.But this is that cost obtains to increase tool resistance.For veteran in the art, this chamfered edge produces a negative rake.Do not have a kind ofly as provided by the present invention in the cutter of prior art, on a side edge of masonry drill tip, use to produce the chamfered edge of negative rake.
An example of masonry drill bit prior art, disclosed by United States Patent (USP)-4026327.This patent disclosure be a kind of rotation drill hammer.Disclosed in United States Patent (USP)-4243113 is the drill bit that is similar to a kind of structure proposed by the invention a little, but does not have these chamfered edge swords.
Drill bit with other characteristics is in United States Patent (USP)-3106927 and 3555937, and disclosed in the BP-1062158.But all not having explanation is the drill bit that directly cuts masonry.
The invention provides a kind of structure of novel useful cheapness, this architecture advances be used for the performance of masonry drill bit, particularly improved the wear-out life of on masonry or the such hard brittle material of rock, holing, and reduced the required power of drill bit feed.
According to a feature of the present invention, discovery is for the masonry drill bit, particularly for the drill bit of the flat shape with a point of a knife and a plurality of side edges, when the drill bit feeding, cutting edge is sent among the material that will cut, and the easiest intersection at cutting edge and side edge of drill bit begins to damage.In general, wearing and tearing are to enlarge along guiding cutting edge and side edge, and cause the rounding of each point of a knife of surrendering mutually reduction and two cutting edges.Along with the aggravation of wearing and tearing, required centripetal force is increased, until required centripetal force greater than available power.
Unexpectedly find the various structures of the scope of the invention, the intersection wearing and tearing that can control cutting edge and each side edge are in this intersection, and wear and tear in big length range more uniformity and provide cutting and mainly broken and have the more geometry of macrostructure drag of cutting edge is provided the result.
Various structures within the scope of the present invention further provide the drill bit with sclerosis side edge.Invent it and unexpectedly increased the service life of drill bit greatly.
Furtherly, be surprised to find that the efficient of drill bit by can improve the side edge chamfered edge on masonry boring the time.
A kind of cutting tip that rotates and be used to hole and for example install on the drill bit of holing on masonry and the rock material towards first direction is provided in general introduction of the present invention.This blade is a planar shaped, and have a chisel edge of determining by first and second cutting edges, and it is the guiding sword that this chisel edge and the 3rd and the 4th side edge intersect, this guiding sword is a side cutting edge at least, and determine, and at guiding sword place chamfered edge by direction of rotation.
This flush cut sheet that is used on typical stone of tradition and the brick drill bit, has a point of a knife of determining by the first and second knife face phase cross surfaces, and rake face and the side knife surface that is positioned at this point of a knife respective side, two points of a knife on the intersection of the front cutting edge that lays respectively at these knife faces have been formed thus, it is characterized in that being included at least one the revolution described rake face in front cutting edge upper edge of this blade and the intersection formation chamfered edge face of side knife surface, thereby be provided at first point of a knife that forms on the intersection of described chamfered edge face and each rake face and second point of a knife that on the intersection of described chamfered edge face and each side knife surface, forms.
Several structures within the scope of the present invention will be represented in the accompanying drawings.Consider after the reading further disclosure hereinafter, the structure of other variations of making for veteran on the art technology, it is understandable also belonging to scope of the present invention.
To represent in the accompanying drawings according to embodiments of the invention and prior art.
Fig. 1 is installed in stereogram on the drill bit handle of a knife according to blade example of the present invention.
Fig. 2 is the plane of cutting tip in the prior art.
Fig. 3 is the front view of cutting tip shown in Figure 2.
Fig. 4 is the cutaway view of cutting open along Fig. 3 center line 4-4 plane.
Fig. 5 is the cutaway view of cutting open along Fig. 3 center line 5-5 plane.
Fig. 6 A-6B is the plane of other prior art drill bit.
Fig. 7 is the stereogram of another routine drill bit in the prior art.
Fig. 8 A and 8B are plane and the front view of expression according to the embodiment of a kind of structure of drill tip of the present invention.
Fig. 9 A and 9B are the plan views that belongs to other drill tip structures of the scope of the invention.
Fig. 9 C and 9D are respectively the side views of drill bit shown in Fig. 9 A and the 9B.
Figure 10 belongs to bit performance comparative graph in the drill bit of the scope of the invention and the prior art.
At first with reference to figure 1, it is that the interior cutting tip of the scope of the invention is installed in the stereogram on the drill bit handle of a knife commonly known in the art.The blade 1 that belongs to the scope of the invention in Fig. 1 is fixed on the handle spare 26 that has groove, and this blade for example can be made by tungsten carbide, and the concrete structure of blade is described hereinafter.
Dregs guiding groove 27 spiral surroundings are on handle of a knife 26, and when handle of a knife 26 rotation, the centripetal force F effect of material is crept in the smear metal that the cutting edge of blade produces, and discharges from dregs guiding groove 27.
Fig. 2～Fig. 6 B has illustrated drill tip commonly known in the art.Fig. 2 is the plane of the example of a prior art blade.Fig. 3 is the front view of same blade, and it is by seven entities limiting of surface, knife face 5A and 7A be with respect to the balanced configuration of blade rotation centerline in both sides, make two knife faces intersect and produced chisel edge 3 that the crossing angle of 5A and 7A is less than 180 ° herein.Equally, knife face 5A and knife face 4 intersect has determined cutting edge 5, and knife face 7A and knife face 4 intersect has determined cutting edge 7.In Fig. 2 and structure shown in Figure 3, knife face 5A and 7A become the B angle to extend between knife face 4 and knife face 6, for example Fig. 4 with become 15 °～30 ° shown in Fig. 5, formed the gap of cutting edge 5 and 7 back.This cutting edge 5 and 7 is to intersect gained with knife face 6 and 4 respectively by knife face 5A and 7A as shown in the figure.
In Fig. 2 and prior art structure shown in Figure 3, side edge face 10A and 11A can be planes as shown in Figure 2, and side edge 10 and 11 intersects with knife face 6 and knife face 4 respectively by knife face 10A and 11A and produces.Knife face 10A and 11A be C with respect to knife face 6 and 4 angles, provide thus as shown in the figure side cutting edge 10 and the gap of 11 back.Though cutting edge 5 and 7 final extensions with side edge 10 and 11 are intersected, and have produced point of a knife 13 and 14.At drill bit is under the new or also unworn situation, and its shear action realizes that by main cutting edge 5 and 7 bore diameter is by the distance decision between point of a knife 13 and 14.Side edge 10 and 11 is only with two lands after point of a knife 13 and 14.Cutting tip is to be made by hard material, for example can be the conglomerate that is suitably combined by little grit, for example the carbide alloy of the sintering that generally uses.
Check the fine structure of point of a knife 13 and 14, can see that the outermost grit of each point of a knife is attached to surperficial much less on the cutter hub than its contiguous particle, and be incorporated on the cutter hub particle area and be proportional to by knife face 7A, 6,10A and the determined solid angle of 5A, 4,11A similarly, for example, particle on the point of a knife on the blade 14 15 is attached on the body by 3 surfaces as shown in Figure 7, and particle 16 is attached on the body by 4 surfaces, obviously, in the particle 15 easier displacements at point of a knife 14 places.
According to a feature of the present invention, the actual strength that is surprised to find that cutting edge 5 and 7 is than much bigger by the intensity of whole abrasion mechanism budgets, and the intensity of having strengthened the point of a knife part of cutting edge 5 and 7 will increase the service life of drill bit widely.
Other prior art structures are also represented in Fig. 6 A and 6B.The side edge face is made of two circular surfaces 17 and 18 in Fig. 6 A, the diameter D of this semicircle
2Equal bore diameter.When drill bit when the F direction is rotated, it is consistent that drill bit side edge and drill bit rotate formed rotary surface.Chamfered edge surface 19 and 20 is angled configurations, makes their rear edge avoid rotary surface.In the structure shown in Fig. 6 B, the diameter D of circular arc knife face 21,22
2Be the diameter of drill bit, whole like this side knife surface is consistent with the surface of revolution of blade.
Referring now to Fig. 1, the drilling tool of drill tip that the figure shows a use that belongs to the scope of the invention, Fig. 8 A, 8B are the enlarged drawings of this drill tip.The principal character of the drill tip that belongs to the scope of the invention that Fig. 8 A, 8B are represented is at side edge 10A and the 11A shown in Fig. 2, and at the knife face 17 and 18 shown in Fig. 6 A, at the knife face shown in Fig. 6 B 21,22 by 43,44 replacements of the chamfered edge face among Fig. 8 A.
According to principal character of the present invention, side knife surface 10A in prior art embodiments shown in Figure 3 and 11A make chamfered edge 43 and 44 such improvement as shown in the figure, make and produced new sword 46 and 47, and new sword 52 and 53, with one group of new cutting tips 57,58,59,60 as shown in the figure, wherein 59,60 corresponding points of a knife are not have in the prior art, shown in Fig. 8 A, chamfered edge face 43 with 44 respectively with respect to contiguous knife face 62 or 61 one-tenth I angles, angle I is 7.5 °-70 °, preferably 45 °.
Point at point of a knife 57,58,59,60 places is bigger than the three-dimensional viewpoin at point of a knife in the prior art example 13 or 14 places like solid angle.And the connection area that is attached on the cutting tip body is more much bigger than 13,14 corresponding end portion of point of a knife of the cutting tip shown in Fig. 2 and Fig. 3.Found that the change of this geometry makes in the physical arrangement at greatest wear place firmer because cutting is carried out with micron or micron form.
Change the angle of attack of cutting edge 63 and 64, apparatus of the present invention are further strengthened.Cutting edge 63 is corresponding with the cutting edge 5 and 7 among Fig. 2 and Fig. 3 with 64.
Other schemes that belong to the scope of the invention are also represented in Fig. 9 A-9B.In Fig. 9 A, blade has horizontal knife face 70,71, the back side edge 72,73 of chamfered edge, and side edge 68,69, the diameter D of side edge
3Consistent with the diameter of its drill bit.Chamfered edge 74,75 angled F and G, thus cutting tips 76,77 and 79,80 formed, and they are similar to the cutting tips 57,59 and 58,60 that is formed by chamfered edge 43 and 44 shown in Fig. 8 A and 8B.Chamfered edge face 74 with 75 respectively with respect to contiguous knife face 70 or 71 one-tenth angle F or G, angle F or G are 7.5 °-70 °, optimum angle F and G respectively are 45 °.
Expression belongs to the another kind of feasible scheme of the scope of the invention in Fig. 9 B.Have chisel edge 92,93 in this scheme, and the diameter D of a semicircle
4Equal the side edge 82,83 of bit diameter.This sword has the arc chamfered edge at 84,85 places, and the length of its chamfered edge part is less than the length by the whole side edge of determining point of a knife 86-91.
In general, determined that within the scope of the invention the chamfered edge face of the cutting face of cutting tip and point of a knife can be with respect to the pivot symmetric arrangement, but or asymmetric arrangement.They can be on whole length of side edge, also can only extend on the partial-length of side edge as shown in the figure.They can also be in tilted layout with respect to the rotation of drill bit, thereby form a triangle chamfered edge face.During the design cutting tip, to include chamfered edge, such blade side knife face will leave the gap with respect to drill bit rotational circle cylinder, it is consistent perhaps cutting tip to be designed to the rotational circle cylinder that makes it with drill bit, perhaps designs cutting tip consistent the combining of rotational circle cylinder of gap and drill bit.
Combine the drill bit of feature of the present invention, in test and the prior art of various structures, do not have without exception of the present invention as previously mentioned on the blade side knife face cutting tip of the front cutting edge of chamfered edge compare, the carbide chip of structure of the present invention installed on the drill bit with other producers produce to be had some similar blade structure a little but certainly not to have the drill bit of foregoing additional point of a knife to compare, from test the conclusion that draws be the chamfered edge face respectively with contiguous knife face 62 or 61 angles (I) that form since 7.5 ° of increasings, effect just improves to some extent.Chamfered edge face and rake face angle are 7.5 °-70 ° preferably 45 °.The width of chamfered edge 43,44 measures from the intersection of itself and side knife surface, along the direction perpendicular to side knife surface can be blade width 1/5 to 3/4 between, with about 1/3 thick be the best.Distance between two points of a knife that produce by chamfered edge be between the described side knife surface of blade distance 1/5 to 3/4.By the point of a knife 46,47 on the intersection of chamfered edge 43,44 and 41,42 generations of described side knife surface,, be 0.25 millimeter (0.010 inch) at least from rake face 61,62 to its corresponding surface 62,61.Chamfered edge face 43,44 from the intersection of itself and side knife surface 41,42 begin to extend back about blade width 1/5 to 3/4 to form first point of a knife 59,60.
Do experiment and used three kinds of materials, promptly have broken polymeric pressure pouring concrete, have polymeric concrete of gravel and granite.Test is carried out with different centripetal forces.Its conclusion is that the drill bit of manufacturing according to the present invention is obtained outstanding result.Show the reduction aspect of feed velocity, surpass other drill bits of comparing with it.And having reduced the rate of wear, in fact the result has improved the useful life of drill bit.All these is illustrated among Figure 10.This figure has illustrated that the degree of depth of boring is the comparison that benchmark carries out the feed velocity of drill bit point of a knife, and the result has illustrated that clearly the cutter of the scope of the invention has superiority.
Even to the superiority of drill bit of the present invention reasonablely all can not fully understand, should believe so at least to have produced a part of improvement.Because cutting force is shared by seven points of a knife, this spline structure is firmer as described.Also make other improvement, power enters blade body because cutting edge is adapted to guide cuts, rather than resembles the prior art tangent with the arc of Cutting trajectory.Furtherly, owing to changed the direction of cutting force, the intensity of cutting edge is increased greatly.Can also obtain other and improve,, can reduce the cutting force on the per unit cutting edge length like this because increased the total length of cutting edge.
Can understand by above-mentioned.But for veteran in the art, by reading embodiment and other structures that above-mentioned explanation can be found some structures, this all belongs to scope of the present invention.
Claims (12)
1, a kind of flush cut blade (1) that is used on typical stone of tradition and the brick drill bit, has one by the first and second knife face (5A, 7A) intersect and definite point of a knife (3), and rake face (4,6) and be positioned at the side knife surface of this point of a knife (3) respective side (10A 11A), has formed thus and laid respectively at these knife faces (7A, 6,10A; 5A, 4, front cutting edge (5,11 11A); 7,10) two points of a knife (13,14) on the intersection, it is characterized in that being included at least one revolution front cutting edge (52 of this blade (1), 53) intersection of described rake face in upper edge (61,62) and side knife surface (41,42) forms chamfered edge face (43,44), thereby be provided at first point of a knife (59,60) that forms on the intersection of described chamfered edge face and each rake face (61,62) and at described chamfered edge face and each side knife surface (41,42) second point of a knife (57,58) that forms on the intersection.
2, blade as claimed in claim 1 is characterized in that described chamfered edge face (43,44) is 7.5 to 70 degree with respect to the angle of contiguous rake face (62,61).
3, blade as claimed in claim 2 is characterized in that described chamfered edge face (44) becomes miter angle with respect to rake face (61).
4, blade as claimed in claim 1 is characterized in that described chamfered edge face (43,44) is from itself and described side knife surface (41,42) intersection extends 1/5 to 3/4 distance of about blade thickness to described rake face (61,62), to form first point of a knife (59,60).
5, blade as claimed in claim 4 is characterized in that second point of a knife (46,47) that the intersection by described chamfered edge face (43,44) and described side knife surface (41,42) produces is 0.25 millimeter (0.010 inch) from rake face to its obverse distance.
6, blade as claimed in claim 1 is characterized in that described chamfered edge face (43,44) only extends on the partial-length of side knife surface (41,42).
7, blade as claimed in claim 1 is characterized in that the axis of rotation that described chamfered edge face (43,44) forms with respect to drill bit is the triangular surface that is in tilted layout.
8, blade as claimed in claim 1 only is characterized in that chamfered edge on one of them of described revolution front cutting edge (52,53).
9, blade as claimed in claim 1 is characterized in that going up chamfered edge at the revolution front cutting edge (52,53) more than.
10, blade as claimed in claim 9 is characterized in that described chamfered edge is asymmetric.
11, blade as claimed in claim 9 is characterized in that described chamfered edge is symmetrical.
12, blade as claimed in claim 6 is characterized in that comprising back chamfered edge face (72,73), and they extend on the length of described side knife surface (70,71).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1242887A | 1987-02-09 | 1987-02-09 | |
| US012428 | 1987-02-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1032131A CN1032131A (en) | 1989-04-05 |
| CN1016949B true CN1016949B (en) | 1992-06-10 |
Family
ID=21754932
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN88101340.4A Expired CN1016949B (en) | 1987-02-09 | 1988-02-09 | Masonry drill tip with strong and chamfered cutting edges |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS63239007A (en) |
| CN (1) | CN1016949B (en) |
| BR (1) | BR8800464A (en) |
| CA (1) | CA1324013C (en) |
| CH (1) | CH674335A5 (en) |
| DE (1) | DE3803910A1 (en) |
| DK (1) | DK61888A (en) |
| FR (1) | FR2610553B1 (en) |
| IT (1) | IT1219838B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW299385B (en) | 1994-12-12 | 1997-03-01 | Black & Decker Inc | Cutting tools for drilling concrete, aggregate, masonry or the like materials |
| US5918105A (en) * | 1994-12-12 | 1999-06-29 | Black & Decker Inc. | Cutting tools for drilling concrete, aggregate, masonry or the like materials |
| DE19720589A1 (en) * | 1997-05-16 | 1998-11-19 | Hilti Ag | Drilling tool |
| GB0201197D0 (en) * | 2002-01-19 | 2002-03-06 | Armeg Ltd | Tile cutting attachment |
| JP7380813B1 (en) * | 2022-11-29 | 2023-11-15 | 株式会社タンガロイ | drilling tool |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE698003C (en) * | 1938-06-29 | 1940-10-30 | Spiralbohrer Werkzeug Und Masc | Twist drill for tough materials |
| DE2807197A1 (en) * | 1978-02-20 | 1979-08-30 | Heller Verwaltungsges | DRILL HEAD OF A ROTARY IMPACT DRILL |
| DE8215364U1 (en) * | 1982-05-24 | 1982-10-14 | Weissenfeld, Günther, 5630 Remscheid | POINT DRILLING TOOL |
| DE3544433C2 (en) * | 1985-12-16 | 1995-12-14 | Hilti Ag | Rock drill |
-
1988
- 1988-02-02 CA CA000557950A patent/CA1324013C/en not_active Expired - Fee Related
- 1988-02-04 IT IT47603/88A patent/IT1219838B/en active
- 1988-02-05 BR BR8800464A patent/BR8800464A/en not_active IP Right Cessation
- 1988-02-08 DK DK061888A patent/DK61888A/en not_active Application Discontinuation
- 1988-02-08 CH CH434/88A patent/CH674335A5/de not_active IP Right Cessation
- 1988-02-08 FR FR8801440A patent/FR2610553B1/en not_active Expired - Fee Related
- 1988-02-09 CN CN88101340.4A patent/CN1016949B/en not_active Expired
- 1988-02-09 JP JP63028610A patent/JPS63239007A/en active Pending
- 1988-02-09 DE DE3803910A patent/DE3803910A1/en not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| DE3803910A1 (en) | 1988-08-18 |
| CA1324013C (en) | 1993-11-09 |
| IT8847603A0 (en) | 1988-02-04 |
| DK61888D0 (en) | 1988-02-08 |
| CH674335A5 (en) | 1990-05-31 |
| FR2610553B1 (en) | 1993-05-07 |
| BR8800464A (en) | 1988-09-20 |
| CN1032131A (en) | 1989-04-05 |
| IT1219838B (en) | 1990-05-24 |
| FR2610553A1 (en) | 1988-08-12 |
| JPS63239007A (en) | 1988-10-05 |
| DK61888A (en) | 1988-08-10 |
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