EP0855257B1 - Zylinderkopfbohrer - Google Patents
Zylinderkopfbohrer Download PDFInfo
- Publication number
- EP0855257B1 EP0855257B1 EP97122890A EP97122890A EP0855257B1 EP 0855257 B1 EP0855257 B1 EP 0855257B1 EP 97122890 A EP97122890 A EP 97122890A EP 97122890 A EP97122890 A EP 97122890A EP 0855257 B1 EP0855257 B1 EP 0855257B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- boring head
- edge
- foregoing
- drill
- head
- 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 - Lifetime
Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 4
- 238000005553 drilling Methods 0.000 abstract description 10
- 239000000428 dust Substances 0.000 abstract 1
- 238000012549 training Methods 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011343 solid material Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 230000004323 axial length Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005253 cladding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
- B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
- B27G15/00—Boring or turning tools; Augers
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/901—Having axially extending peripheral cutting spur
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/905—Having stepped cutting edges
- Y10T408/906—Axially spaced
- Y10T408/9065—Axially spaced with central lead
Definitions
- the invention relates to a cylinder head drill, for example Forstner drills, artificial drills or the like, with an essentially diametrically over the entire circular cross section of the drill head, Main cutting edge with free cutting surfaces with centering tip and connecting with the main cutting edge, open towards the edge, penetrating the drill head at an angle Chip channels, with each end of the main cutting edge one coinciding with the circumferential line of the drill head Pre-cut edge for only guidance the pre-cut edge to the edge of the other chip channel and which the Edge of an essentially cylindrically curved Shell wall of the drill head is.
- Such cylinder head drills are known.
- Solid material worked out cylinder head drill with one carried by a clamping shaft Drilling head specified, which with a centering tip and two Circumferential cutting with two approximately radial ones Main cutting is provided.
- the two main edges chip channels are assigned to the peripheral surface and open to the rear face of the drill head are.
- Each chip channel base is rounded and curved goes smoothly both in the rake face of the assigned Main cutting edge as well as in the, this rake face opposite chip channel side wall over.
- ring hole cutter known for chip removal Have chip channels on the outer wall of the drill head.
- This Shell wall recesses can be in the form of impressions or cutouts.
- the jacket wall recesses to the axis Form grooves parallel or inclined to the axis.
- This Grooves can, for example, by means of a end mill or the like from the otherwise smooth-walled Cladding wall to be worked out. Because of this, that the jacket wall recesses only for cooling serve the drill head, these can also be parallel to Be aligned axis of rotation of the cylinder head drill. However, an embodiment is preferred in which the grooves formed are inclined to the drilling axis.
- the grooves have a rectangular or have a circular cross-section. Will continue suggested that the grooves be open on both sides are.
- the cylinder head drill Made in one piece from solid material become.
- the for heat dissipation of the drill head serving grooves are preferably milled out.
- the pre-cut edge training, arch-shaped pre-cutter one has a wedge-shaped cross-sectional shape, that of a formed on the back of the shell wall hollow surface is.
- the jacket wall recesses according to the invention preferably extend to the pre-cut edge, which is due to the wedge-shaped cross-sectional shape of the arched running pre-cutter tooth-like pre-cutter segments be cut free.
- the tooth gap-like Structure of the pre-cut edge is also counteracting heating of the drill head during drilling. It is also advantageous that the free cut surfaces
- the main cutting edge levels are that, in essence cut the respective hollow surface at right angles.
- the aforementioned openings open into these cut-out areas Chip channels of the cylinder head drill.
- the pre-cut edge in the area between two neighboring ones Grooves have a free cut.
- the tooth gap-like Pre-cut edge sets due to this training during the drilling process, only point by point on the material to be machined Workpiece on. Through the selected free cut in the area of a cut free between two adjacent grooves Pre-cut tooth is an improved one Cutting property in the area of the pre-cut edge and secondly given less warming.
- the bulges from radial protruding tooth sections of individual teeth are. These individual teeth are wall-outer arranged of the drill head and form the pre-cut edge. Due to the radially protruding arrangement of the individual Teeth are preferably axially aligned between them Freedom created.
- the individual teeth are made of hard material and in receiving pockets of the drill head with radial and axial protrusion are soldered.
- the cylinder head drill is consequently in successive operations manufactured. First, the drill head is with its main cutting edge and the one that penetrates the drill head at an angle Chip channels in one piece from solid material worked out.
- the pockets are dimensioned such that the individual teeth used both with radial as well as axial projection on the Drill head are fixed. Because of the axial projection the pre-cut edge is formed. Due to the radial projection the single tooth is between two neighboring ones Individual teeth created a free space. Otherwise is thus smooth-walled jacket wall of the drill head interrupted by the protruding individual teeth. This has less heating of the drill head during the drilling process. Finally it turns out it is advantageous that the receiving pockets one dovetail-shaped cross section for each have a single tooth.
- the individual teeth have a cross section of the receiving pocket corresponding cross-section, whereby after Insert a single tooth with a wall clearance in the receiving bag lies in. In the space thus formed can be after heating the pre-assembled The silver solder used for final fixation of the individual teeth.
- Fig. 1 designed as a Forstner drill cylinder head drill 1, which essentially consists of a Clamping shank 2 and a drill head carried by this 3 composed.
- the latter is essentially cylindrical and has one essentially diametrically over the entire circular cross-section extending main cutting edge 4 with a centering tip 5.
- the main cutting edge 4 is through the centering tip 5 interrupted, with each major cutting section 4 'and 4' 'towards the outer wall 6 of the drill head 3 Open chip channel penetrating the drill head 3 at an angle 7 connects.
- Each outer wall end of the main cutting edge 4 one closes with the circumference of the drill head 3 coincident pre-cut edge 8, which for Guidance of the drill 1 is used.
- Each pre-cut edge 8 extends from the end of the main cutting edge 4 to to the edge of the other chip channel 7. Conditional due to the essentially cylindrical design the drill head 3 thus result in a cylindrical shape curved pre-cut edges 8.
- the rear of the jacket wall 6 is assigned in each case a pre-cut edge 8, a hollow surface 9 is formed. This results in one, the pre-cut edge 8 forming, arcuate roughing cutter 10 with a wedge-shaped cross-sectional shape (cf. Fig. 4).
- the main cutting edge 4 or the main cutting edge sections 4 'and 4' ' have free cut surfaces 11, which are flat and continuously up to the hollow surface 9 of each in the direction of rotation following pre-cutter 10, the open spaces 11 with respect to a transverse plane of the Drill head 3 inclined by an angle of approx. 30 ° each are.
- the chip channels 7 have an arcuate rounded Chip channel base.
- the arched chip channel base protrudes here to the free area 11 of the other main cutting edge section inside.
- the planes of the free cut surfaces 11 essentially cut the respective hollow surface 9 in a right Angle.
- the otherwise smooth-walled jacket wall 6 is in the 1 to 4 shown first embodiment interrupted by grooves 12 of circular arc shape in cross section. As a result, radial bulges 13 are formed, which in this first embodiment Form shell wall recesses.
- the grooves 12 are, for example, by means of one Finger cutter or the like in the jacket wall 6 incorporated, the orientation of the grooves 12 so can be chosen to be parallel to the drill axis run x-x. However, as can be seen in particular in FIG. 2, an orientation is preferred in which the Grooves 12 are aligned inclined to the axis x-x. By doing The embodiment shown here is an angle alpha of approx. 20 °.
- the grooves 12 are open on both sides, that is, they extend in the axial direction considered total drill head height, which is due to the wedge-shaped cross-section of the pre-cutter 10 isolated, tooth-like pre-cutter segments 14 train. In the area of the penetration of grooves 12 and pre-cutters 10 result in eulipsis Open cuts 15.
- each pre-cut edge 8 is in the area between two adjacent grooves 12, that is in the area of one Pre-cutter segment 14, provided with a free cut 16, with which the pre-cut edges 8 only selectively touch the workpiece to be machined.
- a Forstner drill 1 is shown, which is the same the first embodiment with bulges 13 in Form of grooves 12 provided in the region of the jacket wall 6 is. However, here is an essentially rectangular one Cross-sectional shape of the grooves 12 selected. Are further the grooves 12 aligned parallel to the drill axis x-x.
- These grooves 12 are also open on both sides, which in turn is in the area of the pre-cut edges 8 isolated, tooth-like pre-cutter segments 14 train.
- Free cuts 15 formed.
- the bulges 13 and grooves 12 are continuous, that is, open on both sides, trained. It However, versions are also conceivable in which the Bulges 13 closed on one or both sides are trained.
- the bulges 13 and grooves 12 only serve to reduce the heat development in the area of the drill head 3 and not for chip evacuation. The latter takes place over the essentially centrally arranged Chip channels 7. Due to this, the formation and alignment of the bulges 13 freely chosen become.
- FIGS. 8 to 10 A third embodiment of the invention Solution is shown in FIGS. 8 to 10. opposite the previously described embodiments are here the jacket wall 6 of the drill head 3 is not groove-like Bulges interrupted. Rather is training chosen here so that the bulges 13 from radial projecting tooth sections formed by individual teeth 17 are. Accordingly, the jacket wall 6 is not of Depressions but interrupted by protrusions.
- the individual teeth 17 consist of a hard material and are accommodated in pockets 18 of the drill head 3.
- the receiving pockets 18 are in the radial outside area the pre-cutter 10 for the outer casing wall and End face of the drill head 3 is open and have a dovetail-shaped cross section.
- the individual teeth 17 have an insertion cross section the receiving pockets 18 adapted cross-section on.
- the axial length and the radial depth each receiving pocket 18 is selected so that a inserted single tooth 17 with radial projection a and axial projection b is supported.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Forests & Forestry (AREA)
- Drilling Tools (AREA)
- Earth Drilling (AREA)
- Drilling And Boring (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
Description
- Fig. 1
- einen erfindungsgemäßen Zylinderkopfbohrer in Form eines Forstner-Bohrers, in perspektivischer Darstellung eine erste Ausführungsform betreffend;
- Fig. 2
- den Forstner-Bohrer gemäß Fig. 1 in einer Seitenansicht;
- Fig. 3
- den Forstner-Bohrer gemäss Fig. 1 in einer Stirnansicht;
- Fig. 4
- den Längsschnitt durch den Forstner-Bohrer gemäß der Linie IV-IV in Fig. 3;
- Fig. 5
- einen erfindungsgemäßen Forstner-Bohrer in einer Seitenansicht, eine zweite Ausführungsform betreffend;
- Fig. 6
- die Stirnansicht auf den Forstner-Bohrer gemäß der Ausführungsform in Fig. 5;
- Fig. 7
- den Längsschnitt durch den Forstner Bohrer gemäß der Linie VII-VII in Fig. 6;
- Fig. 8
- in einer dritten Ausführungsform die Seitenansicht auf einen mit Einzelzähnen bestückten Forstner-Bohrer;
- Fig. 9
- die Stirnansicht auf den Forstner-Bohrer gemäß der Ausführungsform in Fig. 8;
- Fig. 10
- den Längsschnitt durch den Forstner Bohrer gemäß der Linie X-X in Fig. 9.
Claims (11)
- Zylinderkopfbohrer (1), beispielsweise Forstner-Bohrer, Kunstbohrer oder dergleichen mit einer im wesentlichen diametral sich über den gesamten Kreisquerschnitt des Bohrkopfes (3) erstreckender, Freischnittflächen (11) aufweisender Hauptschneide (4) mit Zentrierspitze (5) und mit sich an der Hauptschneide (4) anschließenden, zum Rand hin offenen, den Bohrkopf (3) schräg durchdringenden Spankanälen (7), wobei sich an jedem Ende der Hauptschneide (4) eine mit der Umfangslinie des Bohrkopfes (3) zusammenfallende Vorschnittkante (8) zur lediglichen Führung des Bohrers (1) anschließt, welche Vorschnittkante (8) bis zum Rand des jeweils anderen Spankanales (7) reicht und welche die Randkante einer im wesentlichen zylindrisch gekrümmten Mantelwand (6) des Bohrkopfes (3) ist, dadurch gekennzeichnet, daß die ansonsten glattwandige Mantelwand (6) durch radiale Ausbuchtungen (13) unterbrochen ist.
- Zylinderkopfbohrer nach Anspruch 1, dadurch gekennzeichnet, daß die Ausbuchtungen (13) Mantelwandvertiefungen sind.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Mantelwandvertiefungen zur Achse parallel oder zur Achse geneigte Nuten (12) bilden.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Nuten (12) einen Rechteck- oder Kreisbogenquerschnitt besitzen.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Nuten (12) beiderrandseitig offen sind.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der die Vorschnittkante (8) ausbildende, bogenförmig verlaufende Vorschneider (10) eine keilförmige Querschnittsform besitzt, die von einer rückseitig der Mantelwand (6) liegenden Hohlfläche (9) ausgebildet ist.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Freischnittflächen (11) der Hauptschneide (4) Ebenen sind, die im wesentlichen rechtwinklig die jeweilige Hohlfläche (9) schneiden.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Vorschnittkante (8) im Bereich zwischen zwei benachbarten Nuten (12) einen Freischnitt (16) besitzt.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Ausbuchtungen (13) von radial vorstehenden Zahnabschnitten von Einzelzähnen (17) ausgebildet sind.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Einzelzähne (17) aus Hartmaterial bestehen und in Aufnahmetaschen (18) des Bohrkopfes (3) mit radialem (a) und axialem Überstand (b) eingelötet sind.
- Zylinderkopfbohrer nach einem oder mehreren der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Aufnahmetaschen (18) einen schwalbenschwanzförmigen Einsteckquerschnitt für jeweils einen Einzelzahn (17) besitzen.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19702423A DE19702423B4 (de) | 1997-01-24 | 1997-01-24 | Zylinderkopfbohrer |
DE19702423 | 1997-01-24 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0855257A2 EP0855257A2 (de) | 1998-07-29 |
EP0855257A3 EP0855257A3 (de) | 1999-07-14 |
EP0855257B1 true EP0855257B1 (de) | 2000-08-16 |
Family
ID=7818209
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97122890A Expired - Lifetime EP0855257B1 (de) | 1997-01-24 | 1997-12-24 | Zylinderkopfbohrer |
Country Status (7)
Country | Link |
---|---|
US (1) | US5975814A (de) |
EP (1) | EP0855257B1 (de) |
AT (1) | ATE195457T1 (de) |
CA (1) | CA2227820C (de) |
DE (2) | DE19702423B4 (de) |
DK (1) | DK0855257T3 (de) |
ES (1) | ES2151221T3 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007002530B4 (de) * | 2006-01-26 | 2016-03-03 | Wolfcraft Gmbh | Forstnerbohrer |
DE202016001386U1 (de) | 2016-03-04 | 2016-03-17 | FAMAG-Werkzeugfabrik GmbH & Co. KG | Zylinderkopfbohrer |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT409600B (de) * | 2000-03-03 | 2002-09-25 | Johann Eberhard Ges M B H | Bohrer |
US6644899B2 (en) | 2000-03-03 | 2003-11-11 | Johann Eberhard Gesellschaft M.B.H. | Drill bit and process of producing a drill bit with improved cutting edges |
AT4227U1 (de) * | 2000-03-03 | 2001-04-25 | Johann Eberhard Ges M B H | Bohrer |
AU4031201A (en) * | 2000-03-03 | 2001-09-12 | Johann Eberhard Gesellschaft M.B.H. | Drill, especially a forstner bit or a multi-spur machine bit |
US6354774B1 (en) | 2000-04-27 | 2002-03-12 | The Mibro Group | Forstner drill bit |
US6612788B2 (en) | 2001-03-30 | 2003-09-02 | Black & Decker Inc. | Self-feed wood bit |
US6874978B2 (en) * | 2002-03-25 | 2005-04-05 | Milwaukee Electric Tool Corporation | Boring bit and methods for manufacturing boring bits |
US20060216123A1 (en) * | 2005-03-24 | 2006-09-28 | Burdick Brett W | Flat bit sphere named the V-back paddlesphere bit |
US7909547B2 (en) * | 2005-10-08 | 2011-03-22 | Milwaukee Electric Tool Corporation | Replaceable tip for a bit or auger bit |
US7648316B2 (en) | 2006-01-26 | 2010-01-19 | Wolfcraft, Gmbh | Forstner drill bit |
US7625160B2 (en) * | 2006-03-02 | 2009-12-01 | Milwaukee Electric Tool Corporation | Cutting tool |
US8328477B2 (en) | 2006-03-02 | 2012-12-11 | Milwaukee Electric Tool Corporation | Cutting tool |
DE102006039426B4 (de) * | 2006-08-23 | 2008-08-28 | Horst Miebach Gmbh | Holzbohrer |
US8070398B2 (en) * | 2008-02-19 | 2011-12-06 | Irwin Industrial Tool Company | Multi-blade self feed bit |
US8727679B2 (en) * | 2009-09-10 | 2014-05-20 | Techtronic Power Tools Technology Limited | Wood boring bit |
CN205218137U (zh) | 2013-02-01 | 2016-05-11 | 米沃奇电动工具公司 | 具有可替换钻头的螺旋钻头 |
US11317647B2 (en) * | 2014-12-02 | 2022-05-03 | Monarch Media, Llc | Coconut water removal device and method therefor |
US20160345619A1 (en) * | 2014-12-02 | 2016-12-01 | Monarch Media Llc. | Coconut removal device and method therefor |
US11123808B2 (en) | 2016-10-07 | 2021-09-21 | Mapal Fabrik Fur Prazisionswerkzeuge Dr. Kress Kg | Metal drilling tool |
CN108972901A (zh) * | 2018-07-17 | 2018-12-11 | 温州市人民医院 | 一种墙壁开孔器 |
NL2024154B1 (en) | 2019-11-04 | 2021-07-19 | Colt Tech Gmbh | Cylindrical head boring tool, in particular a Forstner bit |
DE102022101647A1 (de) | 2022-01-25 | 2023-07-27 | KSB SE & Co. KGaA | Rotierendes Trägerwerkzeug |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2613710A (en) * | 1951-08-02 | 1952-10-14 | Cleveland Twist Drill Co | Machine bit for drilling wood |
DE2005775A1 (de) * | 1970-02-09 | 1971-08-19 | Wolfcraft Robert Wolff Kg, 5441 Weibern | Zylinderkopfbohrer |
US4090807A (en) * | 1976-09-20 | 1978-05-23 | Stewart Arthur A | Axially supported boring tool and method for making same |
DE2842423A1 (de) * | 1978-09-29 | 1980-04-17 | Heinrich Reineke | Rundlochbohrer mit auswechselbaren schneiden |
SE454757B (sv) * | 1984-08-08 | 1988-05-30 | Lars Ove Jansson | Installationsborr |
DE3719758A1 (de) * | 1987-06-15 | 1989-01-05 | Weber Gustav Schlagring | Bohrer |
DE3824502A1 (de) * | 1988-07-20 | 1990-01-25 | Hilti Ag | Hohlbohrwerkzeug |
US5193951A (en) * | 1988-08-24 | 1993-03-16 | Vermont American Corporation | Wood-drilling bit |
DE4115030C1 (de) * | 1991-05-08 | 1992-06-25 | Famag-Werkzeugfabrik Friedr. Aug. Muehlhoff, 5630 Remscheid, De | |
US5499667A (en) * | 1994-06-21 | 1996-03-19 | Nakanishi Construction Company | Drill/cutting bit, and method of making structural joint |
DE19602903A1 (de) * | 1995-04-27 | 1996-10-31 | Hawera Probst Kg Hartmetall | Bohrkronenrohr |
DE29701161U1 (de) * | 1997-01-24 | 1998-05-28 | FAMAG-Werkzeugfabrik Friedr. Aug. Mühlhoff, 42855 Remscheid | Zylinderkopfbohrer |
-
1997
- 1997-01-24 DE DE19702423A patent/DE19702423B4/de not_active Expired - Lifetime
- 1997-12-24 ES ES97122890T patent/ES2151221T3/es not_active Expired - Lifetime
- 1997-12-24 DE DE59702198T patent/DE59702198D1/de not_active Expired - Lifetime
- 1997-12-24 EP EP97122890A patent/EP0855257B1/de not_active Expired - Lifetime
- 1997-12-24 DK DK97122890T patent/DK0855257T3/da active
- 1997-12-24 AT AT97122890T patent/ATE195457T1/de active
-
1998
- 1998-01-21 US US09/010,210 patent/US5975814A/en not_active Expired - Fee Related
- 1998-01-23 CA CA002227820A patent/CA2227820C/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007002530B4 (de) * | 2006-01-26 | 2016-03-03 | Wolfcraft Gmbh | Forstnerbohrer |
DE202016001386U1 (de) | 2016-03-04 | 2016-03-17 | FAMAG-Werkzeugfabrik GmbH & Co. KG | Zylinderkopfbohrer |
Also Published As
Publication number | Publication date |
---|---|
CA2227820C (en) | 2001-10-23 |
CA2227820A1 (en) | 1998-07-24 |
DK0855257T3 (da) | 2000-12-18 |
EP0855257A2 (de) | 1998-07-29 |
DE19702423A1 (de) | 1998-08-06 |
US5975814A (en) | 1999-11-02 |
ES2151221T3 (es) | 2000-12-16 |
EP0855257A3 (de) | 1999-07-14 |
DE59702198D1 (de) | 2000-09-21 |
ATE195457T1 (de) | 2000-09-15 |
DE19702423B4 (de) | 2009-11-12 |
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