US1798944A - Tool for removing broken stud bolts and the like - Google Patents
Tool for removing broken stud bolts and the likeDownload PDFInfo
- Publication number
- US1798944A US1798944AUS481117AUS48111730AUS1798944AUS 1798944 AUS1798944 AUS 1798944AUS 481117 AUS481117 AUS 481117AUS 48111730 AUS48111730 AUS 48111730AUS 1798944 AUS1798944 AUS 1798944A
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- United States
- Prior art keywords
- tool
- hole
- bolt
- ribs
- driven
- Prior art date
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- Expired - Lifetime
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- 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
Definitions
- My present inventionrelates to the improvement of such tools.
- the tools hitherto employed for this purposehave been either cylindrical with longitudinal ribs, conical with longitudinal ribs or simply a tool similar to a twist drill.
- he improved toolwhich is the subject matter of the present invention, is self-centering and automatically maintains itself in accurate alinement with the axis of the drilled hole as it is driven into the same.
- the taperis such that the tool is simply wedged into the hole and the interlocking between the tool and the drilled bolt involves such a reduced area that the tool is insecurely fixed to the bolt and in the case of a tightly seated bolt ifjhe tool will slip instead of rotating the alt.
- My improved toolreadily enters the drilled hole in properly centered relation and is easily driven home therein.
- the material of the bolt-end forming and adjacent to the wall of the drilled holeis readily shifted by the tool to provide the proper interlock- 111 in the case of tools hitherto used or designed and which are provided with longitudinally disposed ribs or the like, the bottoms of the groove or valleys between the rigs become wedged against the wall of the drilled hole and thus prevent the further insertion of the tool into the drilled hole.
- the fixation of the toolis frequentl such that the tool becomes so wedged in the rilled hole that the bolt may be disengaged from the tool only with the greatest difficulty.
- My improved toolis readily driven into and fixed to the bolt so that the latter may be conveniently unscrewed and the bolt may be readily disengaged from the tool without difliculty after the former has been unscrewed.
- my improved toolcomprises a steel bar or rod having its bolt engaging end provided with perimetral surfaces which are substantially tangential to a circle described from the axis of the tool, such surfaces being either flat planes or somewhat curved.
- the bolt-engaging ribswhich are preferably of acute triangular cross-sectional shape, with their shorter faces disposed in the direction in which the tool is to be rotated.
- the lateral surfaces and ribsare preferably so arranged that the former will be out of contact with the Wall of the drill hole so that the body of the tool will not become wedged in the hole.
- the surfaces and ribspreferably converge slightly toward the insertion end of the tool and such end of the tool is tapered and the ends of the; ribs bevelled so that the extreme end of the tool may first be inserted into the drilled hole, thus rendering the tool self-centering and maintaining it in axial alinement with the hole as the tool is driven into the latter.
- the ribsWhen the tool is driven home or to the desired degree into the hole, the ribs are in engagement with the wall of the hole for their entire inserted length or extent while the lateral faces of the tool are out of such engagement.
- the ribs in providing grooves for themselvesact to spread the metal which forms the Wall of the hole and the spaces between the lateral surfaces of the tool and the wall of the hole provides clearance for the displaced metal.
- Fig. 1is a view partly in plan and partly in cross-section showing the tool presented to the drilled hole and ready to be driven thereinto.
- Fig. 2shows the tool driven into the hole and ready to be rotated to unscrew the broken stud bolt.
- Fig. 3is a cross-section taken along the line 3-3 in Fig. 1.
- Fig. 4is a view of the insertion end of the tool.
- Fig. 5is a view similar to Fig. 3 but showing a modification.
- My improved toolhas an impact head so tha it may be hammered into the hole 4 and the head is also squared as at 5 for the application of a wrench or socket handle to rotate the tool.
- the insertion end of the toolis provided with a. plurality of lateral'surfaces 6 which may be flat planes tangentially disposed as illustrated in Figs. 1 to 4, inclusive, or may be slightly curved such for instance as concaved as illustrated in Fig. 5.
- the longitudinally disposed ribs 7which are triangular in shape and which may be simply the .edges formed by the juncture of the lateral surfaces. 6 or, as shown, by forming the short faces 8 disposed in the direction in which the tool is to be rotated, thus forming sharper or knifeedge ribs.
- the surfaces 6 and the ribs 7ma allel but I prefer to taper the bocl of the tool slightly toward its insertion en so that the surfaces and ribs converge slightly.
- the insertion extremity of the toolis tapered, as indicated at 9 so that it will enter the outer end of the hole 4 and the ends of the ribs are bevelled as at 10 so that such bevelled ends will also enter the hole.
- a hole, suitable in diameter to the tool to be employed,is drilled into the bolt, and the tool placed in the position shown in Fig. 1 with its rounded end seated in the outer end of the hole and the bevelled ends of its ribs seated as shown.
- the toolis then driven down into the hole to'the desired degree, as shown in Fi 2 the ribs 7 displacing the metal of the wa o the hole laterally and maintainin a continuous engagement with the metal 0 the bolt for the full inserted length of the tool.
- the surfaces 6 of the toolare out of contact with the wall of the hole, thus providing ample room for the displaced metal and also preventing the tool from becomin so ti htly wedged'n the bolt as to render the dis odgment of the latter, after its removal, from the tool diflicult.
- a toolto be driven in a hole drilled in a broken stud bolt and the like and to be rotate-d to unscrew the bolt, comprising a body having plane side surfaces disposed tangentially to a circle described from the axis of the tool, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces disposed at substantially right angles to the direction in which the tool is to be rotated to unscrew the bolt, said ribs having their ends bevelled off at the entrance end of the tool so as to rest against the end of the hole, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips, the body and ribs having such a converging relation as to facilitate the entrance of the tool into the hole by crowding the edges into the work for substantially the whole length of penetration of the tool without bringing the plane side surfaces of the tool into contact with the side of the hole.
- a toolto be driven in a hole drilled in a broken stud bolt and the like and to be rotated to unscrew the bolt, comprising a body having plane side surfaces disposed tangentially to a circle described from the axis of the tool, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces disposed at substantially right angles to the direction in which the tool is to be rotated to unscrew the bolt, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips, the body and ribs having such a converging relation as to facilitate the entrance of the tool into the hole by crowding the edges into the work for substantially the whole length of penetration of the tool without bringing the plane side surfaces of the tool into contact with the side of the hole.
- a toolto be driven into a hole drilled in a broken stud bolt and the like and to be rotated to unscrew the bolt, comprisin a body having plane side surfaces dispos substantialllU ly tangential to a circle described from the axis of the tool, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces which are substantially radial and parallel to the axis of the tool, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips therefrom, the body and ribs having such converging relation as to facilitate the entrance of the tool into the hole by crowdin the edges into the work for substantially t e whole length of penetration of the tool without bringing the plane side surfaces of the tool into contact with the side of the hole.
- a toolto be driven into a hole drilled in a broken stud bolt and the like and to be rotated to unscrew the bolt, comprising a body having plane side surfaces disposed substantially tangential to a circle described from the axis of the tool, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces which are substantially radial and parallel to the axis of the tool, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips therefrom, the body and ribs having such converging relation as to facilitate the entrance of the tool into the hole by crowding the edges into the work for substantially the whole length of penetration of the tool without bringing the plane side surfaces of the tool into contact with the side of the hole, said ribs having their ends bevelled off to facilitate the entrance of the tool into the hole.
- a toolto be driven in a hole drilled in a broken stud bolt and the like and to be rotated to unscrew the bolt, comprising a body having side surfaces, and lmife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces disposed at substantially right angles in the direction in which the tool is to be retated to unscrew the bolt, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips, the body and ribs having such a converging relationas to facilitate the entrance of the tool into the hole by crowding the edges of the tool into the work for substantially the whole length of penetration of the tool without bringing the side surfaces of the tool into contact with the side of the hole.
- a toolto be driven in a hole drilled in i a broken stud bolt and the like and to be r0- tated to unscrew the bolt'comprising a body having side surfaces, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces disposed at substantially right angles in the direction in which the tool is to be rotated to unscrew the bolt, said ribs having their ends bevelled off at the entrance end of the tool so as to rest against the end of the
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Drilling Tools (AREA)
Description
Patented Mar. 31, 1931 UNITED STATES PATENT OFFICE ELMER F. JACKMAN, 0F WILKINSBURG, PENNSYLVANIA Application filed September 11, 1930. Serial No. 481,117.
Stud bolts andthe like frequently break ofi so that their removal from threaded holes into which they have been screwed is diili cult. In such cases the practice is to drill a hole longitudinally of the bolt-end, fix a tool therein and then unscrew the bolt-end by rotating the tool and the bolt-end.
My present invention relates to the improvement of such tools.
The tools hitherto employed for this purpose have been either cylindrical with longitudinal ribs, conical with longitudinal ribs or simply a tool similar to a twist drill.
In the case of all such tools great difiiculty is experienced in properly centering the tool in the drilled hole and in maintaining its pro er alinement with the axis of the hole.
he improved tool, which is the subject matter of the present invention, is self-centering and automatically maintains itself in accurate alinement with the axis of the drilled hole as it is driven into the same.
Again in the case of the cylindrical tool difficulty is experienced in properly starting the tool into the hole, and also an excess of material of the bolt must be cut away or shifted as the tool is driven home. Again it is very difficult to disengage the drilled boltend from the tool after the former has been unscrewed.
In the case of the conical tool the taper is such that the tool is simply wedged into the hole and the interlocking between the tool and the drilled bolt involves such a reduced area that the tool is insecurely fixed to the bolt and in the case of a tightly seated bolt ifjhe tool will slip instead of rotating the alt.
My improved tool readily enters the drilled hole in properly centered relation and is easily driven home therein. The material of the bolt-end forming and adjacent to the wall of the drilled hole is readily shifted by the tool to provide the proper interlock- 111 in the case of tools hitherto used or designed and which are provided with longitudinally disposed ribs or the like, the bottoms of the groove or valleys between the rigs become wedged against the wall of the drilled hole and thus prevent the further insertion of the tool into the drilled hole. Thus the fixation of the tool is frequentl such that the tool becomes so wedged in the rilled hole that the bolt may be disengaged from the tool only with the greatest difficulty.
My improved tool is readily driven into and fixed to the bolt so that the latter may be conveniently unscrewed and the bolt may be readily disengaged from the tool without difliculty after the former has been unscrewed.
In general my improved tool comprises a steel bar or rod having its bolt engaging end provided with perimetral surfaces which are substantially tangential to a circle described from the axis of the tool, such surfaces being either flat planes or somewhat curved. At the intersections of these lateral surfaces are formed the bolt-engaging ribs which are preferably of acute triangular cross-sectional shape, with their shorter faces disposed in the direction in which the tool is to be rotated. The lateral surfaces and ribs are preferably so arranged that the former will be out of contact with the Wall of the drill hole so that the body of the tool will not become wedged in the hole.
The surfaces and ribs preferably converge slightly toward the insertion end of the tool and such end of the tool is tapered and the ends of the; ribs bevelled so that the extreme end of the tool may first be inserted into the drilled hole, thus rendering the tool self-centering and maintaining it in axial alinement with the hole as the tool is driven into the latter.
When the tool is driven home or to the desired degree into the hole, the ribs are in engagement with the wall of the hole for their entire inserted length or extent while the lateral faces of the tool are out of such engagement. Thus the ribs in providing grooves for themselves act to spread the metal which forms the Wall of the hole and the spaces between the lateral surfaces of the tool and the wall of the hole provides clearance for the displaced metal.
Other novel features of construction and also of arrangement of parts, will appear from the following description.
In the accompanying drawings, wherein a I have illustrated a practical embodiment of the principles of my invention, Fig. 1 is a view partly in plan and partly in cross-section showing the tool presented to the drilled hole and ready to be driven thereinto.
Fig. 2 shows the tool driven into the hole and ready to be rotated to unscrew the broken stud bolt.
Fig. 3 is a cross-section taken along the line 3-3 in Fig. 1.
Fig. 4 is a view of the insertion end of the tool.
Fig. 5 is a view similar to Fig. 3 but showing a modification.
Referring now to the drawings, 1 re resents the casting or other element into w ose threadedhole 2 thebroken stud bolt 3 is screwed.
In removing a broken stud bolt such as shown at 3, the practice is to drill a hole 4' coincident with the axis of the bolt.
My improved tool has an impact head so tha it may be hammered into thehole 4 and the head is also squared as at 5 for the application of a wrench or socket handle to rotate the tool.
The insertion end of the tool is provided with a. plurality of lateral'surfaces 6 which may be flat planes tangentially disposed as illustrated in Figs. 1 to 4, inclusive, or may be slightly curved such for instance as concaved as illustrated in Fig. 5.
These surfaces are at all times out of engagement with the wall of the drilledhole 4, the hole and tool being proportioned to avoid such engagement.
At the intersections or corners of thesurfaces 6 are formed the longitudinally disposedribs 7 which are triangular in shape and which may be simply the .edges formed by the juncture of the lateral surfaces. 6 or, as shown, by forming theshort faces 8 disposed in the direction in which the tool is to be rotated, thus forming sharper or knifeedge ribs.
Thesurfaces 6 and theribs 7 ma allel but I prefer to taper the bocl of the tool slightly toward its insertion en so that the surfaces and ribs converge slightly.
The insertion extremity of the tool is tapered, as indicated at 9 so that it will enter the outer end of thehole 4 and the ends of the ribs are bevelled as at 10 so that such bevelled ends will also enter the hole.
When a broken bolt is to be removed, a hole, suitable in diameter to the tool to be employed, is drilled into the bolt, and the tool placed in the position shown in Fig. 1 with its rounded end seated in the outer end of the hole and the bevelled ends of its ribs seated as shown.
be par- The tool is then driven down into the hole to'the desired degree, as shown inFi 2 theribs 7 displacing the metal of the wa o the hole laterally and maintainin a continuous engagement with the metal 0 the bolt for the full inserted length of the tool. However thesurfaces 6 of the tool are out of contact with the wall of the hole, thus providing ample room for the displaced metal and also preventing the tool from becomin so ti htly wedged'n the bolt as to render the dis odgment of the latter, after its removal, from the tool diflicult.
It will be seen that my im roved tool may be quickly applied to the rilled bolt, will properl aline itself as it is driven into place and wil maintain its engagement with the bolt for the unscrewing of the latter, and that the unscrewed bolt may be easily dislodged from the tool.
What I claim is 1. A tool, to be driven in a hole drilled in a broken stud bolt and the like and to be rotate-d to unscrew the bolt, comprising a body having plane side surfaces disposed tangentially to a circle described from the axis of the tool, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces disposed at substantially right angles to the direction in which the tool is to be rotated to unscrew the bolt, said ribs having their ends bevelled off at the entrance end of the tool so as to rest against the end of the hole, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips, the body and ribs having such a converging relation as to facilitate the entrance of the tool into the hole by crowding the edges into the work for substantially the whole length of penetration of the tool without bringing the plane side surfaces of the tool into contact with the side of the hole.
' 2. A tool, to be driven in a hole drilled in a broken stud bolt and the like and to be rotated to unscrew the bolt, comprising a body having plane side surfaces disposed tangentially to a circle described from the axis of the tool, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces disposed at substantially right angles to the direction in which the tool is to be rotated to unscrew the bolt, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips, the body and ribs having such a converging relation as to facilitate the entrance of the tool into the hole by crowding the edges into the work for substantially the whole length of penetration of the tool without bringing the plane side surfaces of the tool into contact with the side of the hole.
3. A tool, to be driven into a hole drilled in a broken stud bolt and the like and to be rotated to unscrew the bolt, comprisin a body having plane side surfaces dispos substantialllU ly tangential to a circle described from the axis of the tool, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces which are substantially radial and parallel to the axis of the tool, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips therefrom, the body and ribs having such converging relation as to facilitate the entrance of the tool into the hole by crowdin the edges into the work for substantially t e whole length of penetration of the tool without bringing the plane side surfaces of the tool into contact with the side of the hole.
l. A tool, to be driven into a hole drilled in a broken stud bolt and the like and to be rotated to unscrew the bolt, comprising a body having plane side surfaces disposed substantially tangential to a circle described from the axis of the tool, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces which are substantially radial and parallel to the axis of the tool, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips therefrom, the body and ribs having such converging relation as to facilitate the entrance of the tool into the hole by crowding the edges into the work for substantially the whole length of penetration of the tool without bringing the plane side surfaces of the tool into contact with the side of the hole, said ribs having their ends bevelled off to facilitate the entrance of the tool into the hole.
5. A tool, to be driven in a hole drilled in a broken stud bolt and the like and to be rotated to unscrew the bolt, comprising a body having side surfaces, and lmife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces disposed at substantially right angles in the direction in which the tool is to be retated to unscrew the bolt, said tool being driven into the hole and the ribs displacing the metal of the bolt without cutting chips, the body and ribs having such a converging relationas to facilitate the entrance of the tool into the hole by crowding the edges of the tool into the work for substantially the whole length of penetration of the tool without bringing the side surfaces of the tool into contact with the side of the hole.
6. A tool, to be driven in a hole drilled in i a broken stud bolt and the like and to be r0- tated to unscrew the bolt'comprising a body having side surfaces, and knife-edge ribs formed at the intersection of said surfaces, said ribs having relatively narrow flat surfaces disposed at substantially right angles in the direction in which the tool is to be rotated to unscrew the bolt, said ribs having their ends bevelled off at the entrance end of the tool so as to rest against the end of the
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US481117AUS1798944A (en) | 1930-09-11 | 1930-09-11 | Tool for removing broken stud bolts and the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US481117AUS1798944A (en) | 1930-09-11 | 1930-09-11 | Tool for removing broken stud bolts and the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1798944Atrue US1798944A (en) | 1931-03-31 |
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ID=23910673
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US481117AExpired - LifetimeUS1798944A (en) | 1930-09-11 | 1930-09-11 | Tool for removing broken stud bolts and the like |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1798944A (en) |
Cited By (34)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2670639A (en)* | 1951-04-09 | 1954-03-02 | Flowers | Broken spark plug remover |
| US2944453A (en)* | 1958-03-28 | 1960-07-12 | Philip J Brewington | Pipe fitting removal device |
| USD284637S (en) | 1984-07-16 | 1986-07-15 | Pro-Mark, Inc. | Extractor tool for plastic risers |
| US4805495A (en)* | 1987-10-02 | 1989-02-21 | Tauber Michael J | Bolt head reforming tool |
| US4947712A (en)* | 1987-12-23 | 1990-08-14 | Brosnan Robert C | Socket device |
| US20040016324A1 (en)* | 1998-04-13 | 2004-01-29 | Wright Richard B. | Asymmetric wrench and fastener system |
| US20060191379A1 (en)* | 2005-02-25 | 2006-08-31 | Irwin Industrial Tool Company | Fastener extractor |
| US20080226423A1 (en)* | 2003-11-06 | 2008-09-18 | Laurence Antony Brooks | Multi-tiered-recess Screws |
| US20110252925A1 (en)* | 2010-04-16 | 2011-10-20 | Lisle Corporation | Extractor Tool and Extractor Tool Kit |
| CN102380849A (en)* | 2011-11-16 | 2012-03-21 | 杨锋刚 | Broken nail removing device |
| CN102513975A (en)* | 2011-12-23 | 2012-06-27 | 上海电机学院 | Extractor for cracked spark plug |
| DE102012104298A1 (en)* | 2012-05-18 | 2013-11-21 | Hafu Werkzeugfabrik H. J. Fuhrmann Gmbh | Tool for loosening screw, has engaging end which is inserted in inner hexagon contour, where engaging end has cutting edges which intersect corners of engagement contour in general purpose near peaks |
| EP3292958A1 (en)* | 2016-09-09 | 2018-03-14 | Hubitools S.A. | Method for extracting safety screws and extractor for implementation of the method |
| US20190152033A1 (en)* | 2016-04-27 | 2019-05-23 | Grip Holdings Llc | Fastener Extractor Device |
| US11161234B2 (en) | 2018-03-15 | 2021-11-02 | Grip Holdings Llc | Tool holding apparatus |
| US11234899B2 (en) | 2017-05-11 | 2022-02-01 | Scalpal Llc | Grasping facilitators and uses thereof and kits involving the same |
| EP3953108A4 (en)* | 2019-04-12 | 2022-05-04 | Grip Holdings LLC | ANTI-SLIP MULTIDIRECTIONAL TOOL FOR REMOVING FASTENERS |
| US20220281085A1 (en)* | 2017-02-15 | 2022-09-08 | Grip Holdings Llc | Multi-Directional Driver Bit |
| USD966063S1 (en) | 2018-03-07 | 2022-10-11 | Grip Holdings Llc | Socket |
| US11590637B2 (en) | 2017-04-27 | 2023-02-28 | Grip Holdings Llc | Methods and apparatuses for extracting and dislodging fasteners |
| US11602828B2 (en) | 2019-07-30 | 2023-03-14 | Grip Holdings Llc | Multi-grip screw apparatus |
| US11701757B2 (en) | 2018-09-19 | 2023-07-18 | Grip Holdings Llc | Anti-slip fastener remover tool |
| US11759918B2 (en) | 2019-05-09 | 2023-09-19 | Grip Holdings Llc | Anti-slip torque tool with integrated engagement features |
| US20230346445A1 (en)* | 2022-05-01 | 2023-11-02 | Arizona Board Of Regents On Behalf Of The University Of Arizona | Cannulated bone screw extraction device and methods of use thereof |
| WO2023230168A1 (en)* | 2022-05-24 | 2023-11-30 | Grip Holdings Llc | Multi-directional driver bit |
| US11897099B2 (en) | 2018-09-19 | 2024-02-13 | Grip Holdings Llc | Fastener extractor and dislodging tool apparatus |
| US11969864B2 (en) | 2017-05-11 | 2024-04-30 | Scalpal Llc | Multi-tier torque enhancer driver and/or receiver and method of using same |
| USD1026602S1 (en) | 2022-03-17 | 2024-05-14 | Grip Holdings Llc | Selectable twist tool |
| USD1042059S1 (en) | 2022-02-25 | 2024-09-17 | Grip Holdings Llc | Percussion drive |
| US12172270B2 (en) | 2018-08-21 | 2024-12-24 | Grip Holdings Llc | Advanced holding apparatus |
| TWI878011B (en)* | 2018-08-21 | 2025-03-21 | 美商葛利普控股公司 | Advanced holding apparatus |
| US12337449B2 (en) | 2017-07-14 | 2025-06-24 | Grip Holdings Llc | Foreign object removal socket adapter |
| US12403574B2 (en) | 2016-04-27 | 2025-09-02 | Grip Holdings Llc | Fastener extractor device |
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- 1930
- 1930-09-11USUS481117Apatent/US1798944A/ennot_activeExpired - Lifetime
Cited By (52)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2670639A (en)* | 1951-04-09 | 1954-03-02 | Flowers | Broken spark plug remover |
| US2944453A (en)* | 1958-03-28 | 1960-07-12 | Philip J Brewington | Pipe fitting removal device |
| USD284637S (en) | 1984-07-16 | 1986-07-15 | Pro-Mark, Inc. | Extractor tool for plastic risers |
| US4805495A (en)* | 1987-10-02 | 1989-02-21 | Tauber Michael J | Bolt head reforming tool |
| US4947712A (en)* | 1987-12-23 | 1990-08-14 | Brosnan Robert C | Socket device |
| US7484440B2 (en) | 1998-04-13 | 2009-02-03 | Wright Tool Company | Asymmetric wrench and fastener system |
| US6698316B1 (en) | 1998-04-13 | 2004-03-02 | Wright Tool Company | Asymmetrical fastening system |
| US6725746B1 (en)* | 1998-04-13 | 2004-04-27 | Wright Tool Company | High torque wrenching system |
| US6904833B2 (en) | 1998-04-13 | 2005-06-14 | Wright Tool Company | Asymmetric wrench and fastener system |
| US20050223854A1 (en)* | 1998-04-13 | 2005-10-13 | Wright Richard B | Asymmetric wrench and fastener system |
| US7174811B2 (en) | 1998-04-13 | 2007-02-13 | Wright Tool Company | Asymmetric wrench and fastener system |
| US20040016324A1 (en)* | 1998-04-13 | 2004-01-29 | Wright Richard B. | Asymmetric wrench and fastener system |
| US20080226423A1 (en)* | 2003-11-06 | 2008-09-18 | Laurence Antony Brooks | Multi-tiered-recess Screws |
| US20060191379A1 (en)* | 2005-02-25 | 2006-08-31 | Irwin Industrial Tool Company | Fastener extractor |
| US7152509B2 (en) | 2005-02-25 | 2006-12-26 | Irwin Industrial Tool Company | Fastener extractor |
| US8448547B2 (en)* | 2010-04-16 | 2013-05-28 | Lisle Corporation | Extractor tool and extractor tool kit |
| US20110252925A1 (en)* | 2010-04-16 | 2011-10-20 | Lisle Corporation | Extractor Tool and Extractor Tool Kit |
| CN102380849A (en)* | 2011-11-16 | 2012-03-21 | 杨锋刚 | Broken nail removing device |
| CN102513975A (en)* | 2011-12-23 | 2012-06-27 | 上海电机学院 | Extractor for cracked spark plug |
| DE102012104298A1 (en)* | 2012-05-18 | 2013-11-21 | Hafu Werkzeugfabrik H. J. Fuhrmann Gmbh | Tool for loosening screw, has engaging end which is inserted in inner hexagon contour, where engaging end has cutting edges which intersect corners of engagement contour in general purpose near peaks |
| DE102012104298B4 (en)* | 2012-05-18 | 2014-02-27 | Hafu Werkzeugfabrik H. J. Fuhrmann Gmbh | Tool |
| US11154969B2 (en)* | 2016-04-27 | 2021-10-26 | Grip Holdings Llc | Fastener extractor device |
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| US12172270B2 (en) | 2018-08-21 | 2024-12-24 | Grip Holdings Llc | Advanced holding apparatus |
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