CA1137338A - Tool - Google Patents
ToolInfo
- Publication number
- CA1137338A CA1137338A CA000369567A CA369567A CA1137338A CA 1137338 A CA1137338 A CA 1137338A CA 000369567 A CA000369567 A CA 000369567A CA 369567 A CA369567 A CA 369567A CA 1137338 A CA1137338 A CA 1137338A
- Authority
- CA
- Canada
- Prior art keywords
- conical
- axis
- shaft
- parallel
- tool according
- 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
Abstract
ABSTRACT
A tool, particularly a drill bit, with a working part and a shaft integral therewith extending coaxially to the longitudinal axis thereof for fastening in the receiving part of a drilling machine, etc. The longitudinal middle region of the shaft has a part with axis-parallel mantle lines. A
conical part is arranged between the working part and the axis-parallel part, with the diameter of the conical part being greater than the diameter of the axis-parallel part, and the taper of the conical part extending in such a manner that that end face of the conical part having the smaller diameter adjoins the axis-parallel part. A conical piece adjoins at that end of the axis-parallel part located across from the conical part, and this conical piece tapers in the direction towards the free end of the shaft, with the greatest diameter of the conical piece equaling the diameter of the axis-parallel part, and the outer taper of the conical piece extending in a common plane with the taper of the conical part.
A tool, particularly a drill bit, with a working part and a shaft integral therewith extending coaxially to the longitudinal axis thereof for fastening in the receiving part of a drilling machine, etc. The longitudinal middle region of the shaft has a part with axis-parallel mantle lines. A
conical part is arranged between the working part and the axis-parallel part, with the diameter of the conical part being greater than the diameter of the axis-parallel part, and the taper of the conical part extending in such a manner that that end face of the conical part having the smaller diameter adjoins the axis-parallel part. A conical piece adjoins at that end of the axis-parallel part located across from the conical part, and this conical piece tapers in the direction towards the free end of the shaft, with the greatest diameter of the conical piece equaling the diameter of the axis-parallel part, and the outer taper of the conical piece extending in a common plane with the taper of the conical part.
Description
113733~
The present invention relates to a tool, particularly a drill bit, with a working part and a shaft for fastening in the receiving means of a rotary-, impact-, or hammer-drilling machine, with the shaft extending coaxial to the longitudinal axis of the working part.
Known tools of this type, as for instance drill bits and the like, frequently have a shaft which is embodied as a circular cylinder. Tools are also known where the shaft is embodied as a multi-sided profile. To fasten the tools on a drilling machine and the like, the shaft is inserted into an adjust-able jaw chuck of the drilling machine and is clamped therein.
Furthermore, tools are known which have a conical or tapered shaft.
To fasten these tools on a drilling hammer or the like machine tool, the coni-cal shaft of the tool is inserted into a corresponding conically embodied coni-cal receiving means of the drilling hammer.
Fault ls found therewith in that tools with different shafts can be inserted practically only into the particular tool receiving means of the machine tool provided therefor, since a shaft equipped for fastening in the clamping jaw chuck can practically not be held fast in a conical receiving means, and likewise a conical shaft equipped for fastening in a conical receiving means cannot be securely fastened in a clamping jaw chuck of a machine tool.
Accordingly, it is an object of the present invention so to improve a tool of the initially described type that the shaft, without requiring any additional or auxiliary parts, can be firmly inserted and securely centered not only in a clamping jaw chuck, but also in a conical or tapered receiving means of a machine tool.
According to the invention there is provided a tool, particularly a drill bit, which comprises: a working part; and a shaft integral with said working part for fastening in the receiying means of a machine tool, said shaft extending coaxial to the longitudinal axis of said working part, said shaft including: a central longitudinal part having mantle lines which are parallel to said longitudinal axis; a conical part arranged between said work-ing part and said axis-parallel part, the diameter of said conical part being greater than the diameter of said axis-parallel part, and the taper of said conical part extending in such a manner that that end face of said conical part with the smaller diameter adjoins said axis-parallel part; and a conical piece adjoining said axis-parallel part at that end thereof remote from said conical part, said conical piece tapering down in the direction toward the free end of said shaft away from said conical part, the largest diameter of said conical piece equaling the diameter of said axis-parallel part, and the taper of said conical piece extending in a common plane with the taper of said conical part.
The accompanying drawing schematically illustrates preferred embodi-ments of the invention:
Figure 1 illustrates an inventive tool with a shaft inserted in to a conical tool carrier or receiving means of a machine tool;
Figure 2 shows the tool of Figure 1 with a shaft inserted into a clamping jaw chuck of a different machine tool;
Figure 3 is a view of the tool of Figure 1 as sectioned along line III - III; and Figure 4 is a cross-sectional view of a tool with a differently em-~odied inventive shaft.
With the present invention there is attained the advantage that the tool can be selectively used with a machine tool equipped with a clamping jaw chuck, or with a machine tool equipped with a tapered or conical receiving means.
The selective fastening of the shaft occurs without any additionai transition pieces or the like. When the shaft of the tool is inserted into a conical receiving means of a machine tool, the centering and the fixation of the shaft occurs in the front and rear regions on the walls of the conical receiving meanson the one hand by way of the conical piece, and on the other hand by way of the conical part arranged in spaced relationship to the conical piece. Conse-quently, an absolutely secure seat and safe holding of the shaft in the conical receiving means is assured.
If the tool with the inventive shaft is to be utilized with a machine tool which is provided with a clamping jaw chuck, the shaft is pushed so far into the opened clamping jaw chuck that the axis-parallel cylindrical part is located in the region of the clamping jaw. By tightening the clamping jaws, the axis-parallel cylindrical part is exactly centered and securely clamped between the conical piece and the conical part of the shaft, so that also in this instance an accurate alignment and a secure holding of the tool is assured by the receiving means.
Preferred embodiments and further improvements of the present inven-tion are provided by the following features. For instance, the length of the axis-parallel part of the shaft may be essentially equal to the length of the conical part plus the length of the conical piece. The length of the conical part may be approximately 1/4 of the length of the axis-parallel part. The length of the conical piece may be approximately 1/4 of the length of the axis-parallel part. The end face of the conical part may be embodied as an abutment surface. The axis-parallel part of the shaft may have a circular cross section, or it may have a multi-sided cross section with axis-parallel planar surfaces.
The shaft, in the region of the axis-parallel part, may have longitudinal recesses or depressions which are delimited by the planar surfaces. The axis-parallel part of the shaft may have an essentially triangular profile with threeplanar surfaces as well as three longitudinal recesses. On the outside, the 1~3733~
axis-parallel part of the shaft may, between two respective planar surfaces, have part of a conical mantle surface. The planar surfaces of the axis-parallel part may extend over the region of the conical piece as far as to the free end of the shaft. By utilizing these features, particularly suitable clamping engagement regions are attaine~ in an advantageous manner for the selective fastening of the shaft either in a conical receiving means or in a clamping jaw chuck of a machine tool.
Referring now to the drawing in detail, the tool illustrated in ~igures 1 to 3 is a drill bit 1 which has a working or machining part 2 and a shaft 3. The working part 2 and the shaft 3 have a common longitudinal axis 4.
Shaft 3, in the longitudinal middle region thereof, has a cylindrical part 5, the outer surface of which extends parallel to the longitudinal axis 4. The free end region of shaft 3 is embodied as a conical piece 6. This conical piece 6 tapers in the direction toward the free end of shaft 3 and with its largest diameter directly adjoins the axis-parallel part 5, the diameter of the cylin-drical part 5 and the largest diameter of the conical piece 6 being identical.
The length of the conical piece 6 in the direction of the longitudinal axis 4 amounts to approximatcly 1/4 of the length of the cylindrical part 5.
Between the working part 2 and the cylindrical part 5, the shaft 3 has a conical part 8. This conical part 8 delimits with its end face the cylin-drical part 5. The diameter of the conical part 8 is larger than the diameter of the cylindrical part 5, and the end face 9 is embodied as an abutment surface 10. The conical part 8 tapers in the direction toward the cylindrical part 5, so that its diameter at the end face 9 is smaller than its diameter at the side facing the working part 2. The taper 11 of the conical part 8 extends in exact-ly the same plane as the outer taper 12 of the conical piece 6.
It is recognizable from Figure 3 that the cylindrical part 5 of shaft 3 is exactly round and has a circular cross section 13.
In the structure illustrated by Figure 1, shaft 3 of the drill bit 1 is inserted into a conical tool carrier or receiving means 14 of a receiving device 15 which is associated with a non-illustrated boring or drilling hammer or, more particularly, a hammer drill. It is recognizable from Figure 1 that not only the conical piece 6 but also the conical part 8 fully and completely engage the conical wall of the conical receiving means 14. Due to this complete engagement of the conical piece 6 and the conical part 8 in the conical receiv-ing means 14, the drill bit 1 is exactly centered and securely held for true rotation, so that correct operation is assured.
Figure 2 illustrates how the drill bit 1 is arranged for use with a non-illustrated drilling or boring machine. In this case, shaft 3 is placed in a drill chuck 16, which is provided with adjustable clamping jaws 17. Shaft 3 is introduced into the drill chuck 16 until the abutment surface 10 of the coni-cal part 8 engages against the free ends of the clamping jaws 17. The conical part 8 accordingly is located externally of the drill chuck 16. The clamping jaws 17 press radially from the outside against the cylindrical part 5 of shaft 3, so that a satisfactory centering and a secure holding of the drill bit 1 is assured in this case too. Since the diameter of the conical piece 6 is smaller than the diameter of the cylindrical part 5, no clamping forces at all are trans-ferred onto the shaft 3 at this location, so that no unintended transverse stresses occur. In this case, the drill bit 1 is held in the drill chuck 16 exclusively by way of the cylindrical part 5.
Figures 1 and 2 made it clear that the drill bit 1 is securely posi-tioned not only in the conical receiving means 14, but also between the clamping jaws 17, and can selectively be inserted without the slightest difficulty into different receiving means.
_ 5 _ ~137338 Figure 4 illustrates an embodiment of a shaft 18 of a drill bit. The shaft 18 is provided with an axis-parallel part 19 which has a multi-sided cross section 20, and planar surfaces 21 which extend parallel to the longi-tudinal axis of the drill bit. In the region of the axis-parallel part 19, shaft 18 is provided with longitudinal recesses or depressions 22 which are delimited by the planar surfaces 21. Externally, a rounded surface 23 is respectively provided between each two planar surfaces 21. The planar surfaces 21 of the axis-parallel part 9 can, with the present inventive embodiment, extend in the direction of the longitudinal axis of the drill bit over the region of the conical piece as far as to the free end of the shaft 18. With this embodiment, the clamping jaws 17 of the drill chuck 16 engage against the planar surfaces 21, as a result of which an especially secure hold is attained against any peripheral forces which may arise. ~hen the shaft 18 is inserted into a conical receiving means 14, an additional support occurs by way of the rounded surfaces 23, so that also here an especially secure hold is provided.
Figure 4 clearly shows that the axis-parallel part 19 is essentially a tri-angular profile and altogether has three planar surfaces 21, three rounded sur-faces 23, and three longitudinal recesses 22.
The present invention is, of course, in no way limited to the specific disclosure of the specification and drawing, but also encompasses any modifica-tions within the scope of the appended claims.
The present invention relates to a tool, particularly a drill bit, with a working part and a shaft for fastening in the receiving means of a rotary-, impact-, or hammer-drilling machine, with the shaft extending coaxial to the longitudinal axis of the working part.
Known tools of this type, as for instance drill bits and the like, frequently have a shaft which is embodied as a circular cylinder. Tools are also known where the shaft is embodied as a multi-sided profile. To fasten the tools on a drilling machine and the like, the shaft is inserted into an adjust-able jaw chuck of the drilling machine and is clamped therein.
Furthermore, tools are known which have a conical or tapered shaft.
To fasten these tools on a drilling hammer or the like machine tool, the coni-cal shaft of the tool is inserted into a corresponding conically embodied coni-cal receiving means of the drilling hammer.
Fault ls found therewith in that tools with different shafts can be inserted practically only into the particular tool receiving means of the machine tool provided therefor, since a shaft equipped for fastening in the clamping jaw chuck can practically not be held fast in a conical receiving means, and likewise a conical shaft equipped for fastening in a conical receiving means cannot be securely fastened in a clamping jaw chuck of a machine tool.
Accordingly, it is an object of the present invention so to improve a tool of the initially described type that the shaft, without requiring any additional or auxiliary parts, can be firmly inserted and securely centered not only in a clamping jaw chuck, but also in a conical or tapered receiving means of a machine tool.
According to the invention there is provided a tool, particularly a drill bit, which comprises: a working part; and a shaft integral with said working part for fastening in the receiying means of a machine tool, said shaft extending coaxial to the longitudinal axis of said working part, said shaft including: a central longitudinal part having mantle lines which are parallel to said longitudinal axis; a conical part arranged between said work-ing part and said axis-parallel part, the diameter of said conical part being greater than the diameter of said axis-parallel part, and the taper of said conical part extending in such a manner that that end face of said conical part with the smaller diameter adjoins said axis-parallel part; and a conical piece adjoining said axis-parallel part at that end thereof remote from said conical part, said conical piece tapering down in the direction toward the free end of said shaft away from said conical part, the largest diameter of said conical piece equaling the diameter of said axis-parallel part, and the taper of said conical piece extending in a common plane with the taper of said conical part.
The accompanying drawing schematically illustrates preferred embodi-ments of the invention:
Figure 1 illustrates an inventive tool with a shaft inserted in to a conical tool carrier or receiving means of a machine tool;
Figure 2 shows the tool of Figure 1 with a shaft inserted into a clamping jaw chuck of a different machine tool;
Figure 3 is a view of the tool of Figure 1 as sectioned along line III - III; and Figure 4 is a cross-sectional view of a tool with a differently em-~odied inventive shaft.
With the present invention there is attained the advantage that the tool can be selectively used with a machine tool equipped with a clamping jaw chuck, or with a machine tool equipped with a tapered or conical receiving means.
The selective fastening of the shaft occurs without any additionai transition pieces or the like. When the shaft of the tool is inserted into a conical receiving means of a machine tool, the centering and the fixation of the shaft occurs in the front and rear regions on the walls of the conical receiving meanson the one hand by way of the conical piece, and on the other hand by way of the conical part arranged in spaced relationship to the conical piece. Conse-quently, an absolutely secure seat and safe holding of the shaft in the conical receiving means is assured.
If the tool with the inventive shaft is to be utilized with a machine tool which is provided with a clamping jaw chuck, the shaft is pushed so far into the opened clamping jaw chuck that the axis-parallel cylindrical part is located in the region of the clamping jaw. By tightening the clamping jaws, the axis-parallel cylindrical part is exactly centered and securely clamped between the conical piece and the conical part of the shaft, so that also in this instance an accurate alignment and a secure holding of the tool is assured by the receiving means.
Preferred embodiments and further improvements of the present inven-tion are provided by the following features. For instance, the length of the axis-parallel part of the shaft may be essentially equal to the length of the conical part plus the length of the conical piece. The length of the conical part may be approximately 1/4 of the length of the axis-parallel part. The length of the conical piece may be approximately 1/4 of the length of the axis-parallel part. The end face of the conical part may be embodied as an abutment surface. The axis-parallel part of the shaft may have a circular cross section, or it may have a multi-sided cross section with axis-parallel planar surfaces.
The shaft, in the region of the axis-parallel part, may have longitudinal recesses or depressions which are delimited by the planar surfaces. The axis-parallel part of the shaft may have an essentially triangular profile with threeplanar surfaces as well as three longitudinal recesses. On the outside, the 1~3733~
axis-parallel part of the shaft may, between two respective planar surfaces, have part of a conical mantle surface. The planar surfaces of the axis-parallel part may extend over the region of the conical piece as far as to the free end of the shaft. By utilizing these features, particularly suitable clamping engagement regions are attaine~ in an advantageous manner for the selective fastening of the shaft either in a conical receiving means or in a clamping jaw chuck of a machine tool.
Referring now to the drawing in detail, the tool illustrated in ~igures 1 to 3 is a drill bit 1 which has a working or machining part 2 and a shaft 3. The working part 2 and the shaft 3 have a common longitudinal axis 4.
Shaft 3, in the longitudinal middle region thereof, has a cylindrical part 5, the outer surface of which extends parallel to the longitudinal axis 4. The free end region of shaft 3 is embodied as a conical piece 6. This conical piece 6 tapers in the direction toward the free end of shaft 3 and with its largest diameter directly adjoins the axis-parallel part 5, the diameter of the cylin-drical part 5 and the largest diameter of the conical piece 6 being identical.
The length of the conical piece 6 in the direction of the longitudinal axis 4 amounts to approximatcly 1/4 of the length of the cylindrical part 5.
Between the working part 2 and the cylindrical part 5, the shaft 3 has a conical part 8. This conical part 8 delimits with its end face the cylin-drical part 5. The diameter of the conical part 8 is larger than the diameter of the cylindrical part 5, and the end face 9 is embodied as an abutment surface 10. The conical part 8 tapers in the direction toward the cylindrical part 5, so that its diameter at the end face 9 is smaller than its diameter at the side facing the working part 2. The taper 11 of the conical part 8 extends in exact-ly the same plane as the outer taper 12 of the conical piece 6.
It is recognizable from Figure 3 that the cylindrical part 5 of shaft 3 is exactly round and has a circular cross section 13.
In the structure illustrated by Figure 1, shaft 3 of the drill bit 1 is inserted into a conical tool carrier or receiving means 14 of a receiving device 15 which is associated with a non-illustrated boring or drilling hammer or, more particularly, a hammer drill. It is recognizable from Figure 1 that not only the conical piece 6 but also the conical part 8 fully and completely engage the conical wall of the conical receiving means 14. Due to this complete engagement of the conical piece 6 and the conical part 8 in the conical receiv-ing means 14, the drill bit 1 is exactly centered and securely held for true rotation, so that correct operation is assured.
Figure 2 illustrates how the drill bit 1 is arranged for use with a non-illustrated drilling or boring machine. In this case, shaft 3 is placed in a drill chuck 16, which is provided with adjustable clamping jaws 17. Shaft 3 is introduced into the drill chuck 16 until the abutment surface 10 of the coni-cal part 8 engages against the free ends of the clamping jaws 17. The conical part 8 accordingly is located externally of the drill chuck 16. The clamping jaws 17 press radially from the outside against the cylindrical part 5 of shaft 3, so that a satisfactory centering and a secure holding of the drill bit 1 is assured in this case too. Since the diameter of the conical piece 6 is smaller than the diameter of the cylindrical part 5, no clamping forces at all are trans-ferred onto the shaft 3 at this location, so that no unintended transverse stresses occur. In this case, the drill bit 1 is held in the drill chuck 16 exclusively by way of the cylindrical part 5.
Figures 1 and 2 made it clear that the drill bit 1 is securely posi-tioned not only in the conical receiving means 14, but also between the clamping jaws 17, and can selectively be inserted without the slightest difficulty into different receiving means.
_ 5 _ ~137338 Figure 4 illustrates an embodiment of a shaft 18 of a drill bit. The shaft 18 is provided with an axis-parallel part 19 which has a multi-sided cross section 20, and planar surfaces 21 which extend parallel to the longi-tudinal axis of the drill bit. In the region of the axis-parallel part 19, shaft 18 is provided with longitudinal recesses or depressions 22 which are delimited by the planar surfaces 21. Externally, a rounded surface 23 is respectively provided between each two planar surfaces 21. The planar surfaces 21 of the axis-parallel part 9 can, with the present inventive embodiment, extend in the direction of the longitudinal axis of the drill bit over the region of the conical piece as far as to the free end of the shaft 18. With this embodiment, the clamping jaws 17 of the drill chuck 16 engage against the planar surfaces 21, as a result of which an especially secure hold is attained against any peripheral forces which may arise. ~hen the shaft 18 is inserted into a conical receiving means 14, an additional support occurs by way of the rounded surfaces 23, so that also here an especially secure hold is provided.
Figure 4 clearly shows that the axis-parallel part 19 is essentially a tri-angular profile and altogether has three planar surfaces 21, three rounded sur-faces 23, and three longitudinal recesses 22.
The present invention is, of course, in no way limited to the specific disclosure of the specification and drawing, but also encompasses any modifica-tions within the scope of the appended claims.
Claims (11)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A tool, particularly a drill bit, which comprises: a working part;
and a shaft integral with said working part for fastening in the receiving means of a machine tool, said shaft extending coaxial to the longitudinal axis of said working part, said shaft including: a central longitudinal part having mantle lines which are parallel to said longitudinal axis; a conical part arranged between said working part and said axis-parallel part, the diameter of said conical part being greater than the diameter of said axis-parallel part, and the taper of said conical part extending in such a manner that that end face of said conical part with the smaller diameter adjoins said axis-parallel part;
and a conical piece adjoining said axis-parallel part at that end thereof remote from said conical part, said conical piece tapering down in the direction toward the free end of said shaft away from said conical part, the largest diameter of said conical piece equaling the diameter of said axis-parallel part, and the taper of said conical piece extending in a common plane with the taper of said conical part.
and a shaft integral with said working part for fastening in the receiving means of a machine tool, said shaft extending coaxial to the longitudinal axis of said working part, said shaft including: a central longitudinal part having mantle lines which are parallel to said longitudinal axis; a conical part arranged between said working part and said axis-parallel part, the diameter of said conical part being greater than the diameter of said axis-parallel part, and the taper of said conical part extending in such a manner that that end face of said conical part with the smaller diameter adjoins said axis-parallel part;
and a conical piece adjoining said axis-parallel part at that end thereof remote from said conical part, said conical piece tapering down in the direction toward the free end of said shaft away from said conical part, the largest diameter of said conical piece equaling the diameter of said axis-parallel part, and the taper of said conical piece extending in a common plane with the taper of said conical part.
2. A tool according to claim 1, in which the length of said axis-parallel part of said shaft is essentially equal to the length of said conical part plus the length of said conical piece.
3. A tool according to claim 1, in which the length of said conical part is approximately 1/4 of the length of said axis-parallel part.
4. A tool according to claim 1, in which the length of said conical piece is approximately 1/4 of the length of said axis-parallel part.
5. A tool according to claim 1, in which that end face of said conical part with the smaller diameter is embodied as an abutment surface.
6. A tool according to claim 5, in which said axis-parallel part of said shaft has circular cross section.
7. A tool according to claim 5, in which said axis-parallel part of said shaft has a multi-sided cross section with axis-parallel planar surfaces.
8. A tool according to claim 7, in which said shaft, in the region of said axis-parallel part, is provided with longitudinal recesses which are de-limited by said planar surfaces.
9. A tool according to claim 8, in which said axis-parallel part of said shaft has an essentially triangular profile with three planar surfaces as well as three longitudinal recesses.
10. A tool according to claim 9, in which the outer periphery of said axis-parallel part of said shaft between two respective planar surfaces is a part of a conical mantle surface.
11. A tool according to claim 10, in which said planar surfaces of said axis-parallel part extend over the region of said conical piece to the free end of said shaft away from said conical part.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEG8002135.8 | 1980-01-29 | ||
| DE19808002135 DE8002135U1 (en) | 1980-01-29 | 1980-01-29 | TOOL |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1137338A true CA1137338A (en) | 1982-12-14 |
Family
ID=6712380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000369567A Expired CA1137338A (en) | 1980-01-29 | 1981-01-28 | Tool |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA1137338A (en) |
| DE (1) | DE8002135U1 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10391591B2 (en) | 2017-08-02 | 2019-08-27 | 80 Percent Arms Inc. | Jig for firearm lower receiver manufacture |
| US10456846B1 (en) | 2017-11-10 | 2019-10-29 | 80 Percent Arms Inc. | Rotary tool for lower receiver manufacturing |
| US10718578B2 (en) | 2016-10-05 | 2020-07-21 | 80 Percent Arms, Inc. | Jig for manufacturing of firearm lower receiver |
| US10875135B2 (en) | 2017-04-18 | 2020-12-29 | 80 Percent Arms Inc. | Jig for firearm lower receiver manufacture |
| US11000930B1 (en) | 2017-11-10 | 2021-05-11 | Blackhawk Manufacturing Group Inc. | Advanced jig for manufacturing of firearm lower receiver |
| US11796298B2 (en) | 2013-11-11 | 2023-10-24 | Blackhawk Manufacturing Group Inc. | Jig for firearm lower receiver manufacture |
-
1980
- 1980-01-29 DE DE19808002135 patent/DE8002135U1/en not_active Expired
-
1981
- 1981-01-28 CA CA000369567A patent/CA1137338A/en not_active Expired
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11796298B2 (en) | 2013-11-11 | 2023-10-24 | Blackhawk Manufacturing Group Inc. | Jig for firearm lower receiver manufacture |
| US10718578B2 (en) | 2016-10-05 | 2020-07-21 | 80 Percent Arms, Inc. | Jig for manufacturing of firearm lower receiver |
| US11397063B2 (en) | 2016-10-05 | 2022-07-26 | Blackhawk Manufacturing Group Inc. | Jig for manufacturing of firearm lower receiver |
| US10875135B2 (en) | 2017-04-18 | 2020-12-29 | 80 Percent Arms Inc. | Jig for firearm lower receiver manufacture |
| US11623313B2 (en) | 2017-04-18 | 2023-04-11 | Blackhawk Manufacturing Group Inc. | Jig for firearm lower receiver manufacture |
| US10391591B2 (en) | 2017-08-02 | 2019-08-27 | 80 Percent Arms Inc. | Jig for firearm lower receiver manufacture |
| US10456846B1 (en) | 2017-11-10 | 2019-10-29 | 80 Percent Arms Inc. | Rotary tool for lower receiver manufacturing |
| US11000930B1 (en) | 2017-11-10 | 2021-05-11 | Blackhawk Manufacturing Group Inc. | Advanced jig for manufacturing of firearm lower receiver |
| US11298759B2 (en) | 2017-11-10 | 2022-04-12 | Blackhawk Manufacturing Group Inc. | Rotary tool for lower receiver manufacturing |
| US11607765B2 (en) | 2017-11-10 | 2023-03-21 | Blackhawk Manufacturing Group Inc. | Advanced jig for manufacturing of firearm lower receiver |
| US11794261B2 (en) | 2017-11-10 | 2023-10-24 | Blackhawk Manufacturing Group Inc. | Rotary tool for lower receiver manufacturing |
Also Published As
| Publication number | Publication date |
|---|---|
| DE8002135U1 (en) | 1980-04-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |