DE19812989C2 - Center drill bushing that can be attached with a press stroke to remove flush-broken screws or threaded bolts - Google Patents
Center drill bushing that can be attached with a press stroke to remove flush-broken screws or threaded boltsInfo
- Publication number
- DE19812989C2 DE19812989C2 DE19812989A DE19812989A DE19812989C2 DE 19812989 C2 DE19812989 C2 DE 19812989C2 DE 19812989 A DE19812989 A DE 19812989A DE 19812989 A DE19812989 A DE 19812989A DE 19812989 C2 DE19812989 C2 DE 19812989C2
- Authority
- DE
- Germany
- Prior art keywords
- drill bushing
- broken
- attached
- flush
- center drill
- 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 - Fee Related
Links
- 238000005553 drilling Methods 0.000 claims description 2
- 229910000760 Hardened steel Inorganic materials 0.000 claims 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/18—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same withdrawing broken threaded parts or twist drills
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
Es ist bekannt, daß das Herauslösen einer bündig abgebrochenen Schraube bzw. eines Gewindebolzens in der Praxis größere Probleme verursacht. Es gibt zwar im Handel Hilfswerkzeuge wie Linksdreher (Schraubenausdreher), jedoch muß zuerst die zu entfernende Schraube angebohrt werden. Ein zentrisches Bohren mit der Handbohrmaschine ist fast unmöglich, auch unter Zuhilfenahme eines Körners. Es resultiert meistens bei kleineren Schrauben eine Beschädigung der Gewinde. Es bleibt danach nur noch eine Vergrößerung des Gewindedurchmessers übrig.It is known that the loosening of a flush broken screw or of a threaded bolt causes major problems in practice. There are in the trade auxiliary tools such as left-handed (screw extractor), but must first drill the screw to be removed. Centric drilling with the hand drill is almost impossible, even with the help of one Grains. It usually results in damage with smaller screws the thread. After that there is only an enlargement of the Thread diameter left.
Aus der DE 197 07 428 C2 ist eine Vorrichtung zum Entfernen einer abgebrochenen Schraube, deren Stumpf ausschließlich unterhalb bzw. oberhalb der Gewindeeingangsfläche liegt, bekannt.DE 197 07 428 C2 describes a device for removing a broken screw, the stump of which is only below or above the thread input surface is known.
Aus der US Pat. 2,281,164 ist auch eine Vorrichtung zum Entfernen einer abgebrochenen Schraube, deren Stumpf ausschließlich unterhalb der Gewindeeingangsfläche liegt, bekannt.From US Pat. 2,281,164 is also a device for removing a broken screw, the stump of which is only below the Thread entry surface is known.
Aus der US Pat. 2,408,450 ist ebenfalls eine Vorrichtung zum Entfernen einer abgebrochenen Schraube, deren Stumpf unterhalb der Gewindeeingangsfläche liegt, bekannt. Bei dieser Vorrichtung ist in eine Brücke eine Gewindehülse eingeschraubt. Die Brücke wird an zu der Bohrung mit der abgebrochenen Schraube benachbarten Bohrungen befestigt. Bei dieser Vorrichtung weist die Gewindehülse eine zentrale Bohrung mit Linksgewinde auf. In diese Bohrung wird ein Gewindestift mit einem Schneidkopf eingeschraubt, um die abgebrochene Schraube herauszudrehen.From US Pat. 2,408,450 is also a device for removing a broken screw, its stump below the thread entry surface is known. In this device, a threaded sleeve is screwed into a bridge. The bridge is on to the hole with the broken off Screw attached adjacent holes. At this The threaded sleeve has a central bore with a left-hand thread on. A grub screw with a cutting head is inserted into this hole screwed in to unscrew the broken screw.
Der Erfindung liegt die Aufgabe zugrunde, eine einfache Vorrichtung zu schaffen, mit deren Hilfe das Herausdrehen von bündig abgebrochenen Schrauben oder Gewindebolzen vereinfacht wird.The invention has for its object to a simple device create, with the help of unscrewing the flush broken Screws or threaded bolts is simplified.
Diese Aufgabe wird mit einem Hilfswerkzeug mit den Merkmalen des Anspruchs gelöst.This task is accomplished with an auxiliary tool with the characteristics of Claim solved.
Die vorgeschlagene aufsetzbare Zentrierbohrbuchse ist einfach aufgebaut und ermöglich durch einen Preßschlag das Plazieren zum Herstellen einer zentralen Bohrung in der bündig abgebrochenen Schraube oder Gewindebolzen.The proposed attachable center drill bushing is simply constructed and enables placement by means of a pressure blow to produce one central hole in the flush broken screw or threaded bolt.
Die neu erfundene Zentrierbohrbuchse wird nachfolgend anhand der Zeichnung erläutert. Es zeigen:The newly invented centering drill bush is subsequently based on the Drawing explained. Show it:
Fig. 1 Zentrierbohrbuchse vor dem Plazieren und Preßschlag; Fig. 1 center drill bushing before placement and impact;
Fig. 2 Zentrierbohrbuchse nach dem Plazieren und Preßschlag. Fig. 2 center drill bush after placement and impact.
Eine Zentrierbohrbuchse (1) besteht aus einem rotationssymmetrischen Körper, deren Einsatzseite mit angeschrägten Körnerflanken (4) versehen ist. Die Zentrierbohrbuchse weist ferner eine zentrale Bohrung (5) auf, die der Führung des Bohrers (6) dient.A centering drill bush ( 1 ) consists of a rotationally symmetrical body, the insert side of which is provided with beveled grain flanks ( 4 ). The centering drill bushing also has a central bore ( 5 ) which serves to guide the drill ( 6 ).
Die Fig. 1 zeigt die Zentrierbohrbuchse vor dem Plazieren an der bündig abgebrochenen Schraube bzw. Gewindebolzen. Fig. 1 shows the center drill bush before placing on the flush broken screw or threaded bolt.
Da eine bündig abgebrochene Schraube durch die Neigung des Gewindes eine Rille aufweist, ist das Plazieren der Zentrierbohrbuchse erleichtert. Nach dem Plazieren wird mittels eines Hammers angeschlagen. Die scharf angeschrägten Körnerflanken werden sich in der abgebrochenen Schraube plazieren, Fig. 2. Es steht nichts im Wege, die Buchse stabil zu halten. Nun kann eine zentrale Bohrung in der abgebrochenen Schraube (2) vorgenommen werden, da der Bohrer (6) durch die Zentrierbohrbuchse (1) geführt (5) wird.Since a flush broken screw has a groove due to the inclination of the thread, the placement of the center drill bushing is made easier. After placing it, hit it with a hammer. The sharply beveled grain flanks will be placed in the broken screw, Fig. 2. Nothing stands in the way of keeping the bushing stable. Now a central hole can be made in the broken screw ( 2 ) because the drill ( 6 ) is guided ( 5 ) through the center drill bushing ( 1 ).
Der mit der zentralen Bohrung versehene Stumpf der Schraube (2) kann nun mit einem Schraubenausdreher entfernt werden.The stump of the screw ( 2 ) with the central hole can now be removed with a screw extractor.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19812989A DE19812989C2 (en) | 1997-03-25 | 1998-03-24 | Center drill bushing that can be attached with a press stroke to remove flush-broken screws or threaded bolts |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE29705347U DE29705347U1 (en) | 1997-03-25 | 1997-03-25 | Center drill bushing which can be attached by means of a press stroke to make holes in flush-cut / twisted screws or threaded bolts in order to remove them |
| DE19812989A DE19812989C2 (en) | 1997-03-25 | 1998-03-24 | Center drill bushing that can be attached with a press stroke to remove flush-broken screws or threaded bolts |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| DE19812989A1 DE19812989A1 (en) | 1998-10-01 |
| DE19812989C2 true DE19812989C2 (en) | 2000-08-17 |
Family
ID=8037982
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29705347U Expired - Lifetime DE29705347U1 (en) | 1997-03-25 | 1997-03-25 | Center drill bushing which can be attached by means of a press stroke to make holes in flush-cut / twisted screws or threaded bolts in order to remove them |
| DE19812989A Expired - Fee Related DE19812989C2 (en) | 1997-03-25 | 1998-03-24 | Center drill bushing that can be attached with a press stroke to remove flush-broken screws or threaded bolts |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE29705347U Expired - Lifetime DE29705347U1 (en) | 1997-03-25 | 1997-03-25 | Center drill bushing which can be attached by means of a press stroke to make holes in flush-cut / twisted screws or threaded bolts in order to remove them |
Country Status (1)
| Country | Link |
|---|---|
| DE (2) | DE29705347U1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE202007011551U1 (en) * | 2007-08-17 | 2007-10-25 | Klann-Spezial-Werkzeugbau-Gmbh | Centering device for aligning tools for machining bores on cylinder heads |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2281164A (en) * | 1941-02-19 | 1942-04-28 | Howard S Maling | Device for removing broken studs |
| US2408450A (en) * | 1944-03-24 | 1946-10-01 | V Ray Van Wey | Broken stud remover |
| DE19707428C2 (en) * | 1996-04-01 | 1998-07-30 | Zbigniew Jablonski | Centering tool for centering a drill bit, usable for the removal of defective or broken screws, threaded bolts or the like. |
-
1997
- 1997-03-25 DE DE29705347U patent/DE29705347U1/en not_active Expired - Lifetime
-
1998
- 1998-03-24 DE DE19812989A patent/DE19812989C2/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2281164A (en) * | 1941-02-19 | 1942-04-28 | Howard S Maling | Device for removing broken studs |
| US2408450A (en) * | 1944-03-24 | 1946-10-01 | V Ray Van Wey | Broken stud remover |
| DE19707428C2 (en) * | 1996-04-01 | 1998-07-30 | Zbigniew Jablonski | Centering tool for centering a drill bit, usable for the removal of defective or broken screws, threaded bolts or the like. |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19812989A1 (en) | 1998-10-01 |
| DE29705347U1 (en) | 1997-05-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OP8 | Request for examination as to paragraph 44 patent law | ||
| D2 | Grant after examination | ||
| 8364 | No opposition during term of opposition | ||
| 8320 | Willingness to grant licences declared (paragraph 23) | ||
| R409 | Internal rectification of the legal status completed | ||
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |
Effective date: 20111001 |
|
| R409 | Internal rectification of the legal status completed | ||
| R119 | Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee |