CA3005347A1 - Self-undercut expansion anchor system with bore cutters - Google Patents
Self-undercut expansion anchor system with bore cutters Download PDFInfo
- Publication number
- CA3005347A1 CA3005347A1 CA3005347A CA3005347A CA3005347A1 CA 3005347 A1 CA3005347 A1 CA 3005347A1 CA 3005347 A CA3005347 A CA 3005347A CA 3005347 A CA3005347 A CA 3005347A CA 3005347 A1 CA3005347 A1 CA 3005347A1
- Authority
- CA
- Canada
- Prior art keywords
- anchor
- bullet
- bore hole
- cutters
- self
- 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.)
- Abandoned
Links
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004075 alteration Effects 0.000 description 2
- 238000005553 drilling Methods 0.000 description 2
- 230000013011 mating Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0033—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts having a jacket or outer tube
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/0026—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection characterised by constructional features of the bolts
- E21D21/0053—Anchoring-bolts in the form of lost drilling rods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
- F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
- F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
- F16B13/063—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander
- F16B13/065—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve by the use of an expander fastened by extracting the screw, nail or the like
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Dowels (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Joining Of Building Structures In Genera (AREA)
Abstract
The present disclosure provides for a system to optimally set an anchor within a bore hole. The anchor is comprised of at least two angular cutters having a taper of several degrees to facilitate cutting through the cementuous material of the bore hole. A lower end of the anchor spreads radially over a bullet, the bullet secured to the anchor, to set the undercut anchor within the pre-drilled bore hole.
Description
SELF -UNDERCUT EXPANSION ANCHOR SYSTEM WITH BORE
CUTTERS
FIELD
The invention relates to the field of anchors, and more specifically to a self-undercut expansion anchor system having improved bore cutters for use in cementuous materials.
SUMMARY
The present disclosure provides a self-undercut expansion anchor system for use in a pre-drilled bore hole, comprising an anchor further comprised of at least two angular cutters positioned at a lower end of the anchor and separated by a slit, to cut through a material of the pre-drilled bore hole;
and, a bullet connected to the anchor to provide a surface on which the cutters positioned at a lower end of the anchor can expand and radially cut into the pre-drilled bore hole, wherein the lower end of the anchor expands radially over the bullet to set the system in the pre-drilled bore hole.
BRIEF DESCRIPTION OF THE DRAWINGS
The following figures serve to illustrate various embodiments of features of the disclosure. These figures are illustrative and are not intended to be limiting.
Figure 1 is a perspective exploded view of an improved expansion anchor and a bullet, according to an embodiment of the present disclosure;
Figure 2 is a perspective view of the bullet secured within the improved anchor, according to an embodiment of the present disclosure;
Figure 3 is a bottom view of the anchor, according to an embodiment of the present disclosure;
Figure 4 is an enlarged front cutaway view a lower portion of the anchor, according to an embodiment of the present disclosure;
Figure 5 is a front cutaway view of a setting tool being inserted into the anchor and the bullet to be in turn inserted into a bore hole, according to an embodiment of the present disclosure;
Figure 6,is a front cutaway view of the setting tool engaged within the anchor, the anchor and bullet being positioned into the bore hole before drilling has begun, according to an embodiment of the present invention;
Figure 7 is a front cutaway view of the setting tool being hammered and drilled within the anchor, the anchor spreading over the bullet during the setting of the anchor, according to an embodiment of the present invention;
CUTTERS
FIELD
The invention relates to the field of anchors, and more specifically to a self-undercut expansion anchor system having improved bore cutters for use in cementuous materials.
SUMMARY
The present disclosure provides a self-undercut expansion anchor system for use in a pre-drilled bore hole, comprising an anchor further comprised of at least two angular cutters positioned at a lower end of the anchor and separated by a slit, to cut through a material of the pre-drilled bore hole;
and, a bullet connected to the anchor to provide a surface on which the cutters positioned at a lower end of the anchor can expand and radially cut into the pre-drilled bore hole, wherein the lower end of the anchor expands radially over the bullet to set the system in the pre-drilled bore hole.
BRIEF DESCRIPTION OF THE DRAWINGS
The following figures serve to illustrate various embodiments of features of the disclosure. These figures are illustrative and are not intended to be limiting.
Figure 1 is a perspective exploded view of an improved expansion anchor and a bullet, according to an embodiment of the present disclosure;
Figure 2 is a perspective view of the bullet secured within the improved anchor, according to an embodiment of the present disclosure;
Figure 3 is a bottom view of the anchor, according to an embodiment of the present disclosure;
Figure 4 is an enlarged front cutaway view a lower portion of the anchor, according to an embodiment of the present disclosure;
Figure 5 is a front cutaway view of a setting tool being inserted into the anchor and the bullet to be in turn inserted into a bore hole, according to an embodiment of the present disclosure;
Figure 6,is a front cutaway view of the setting tool engaged within the anchor, the anchor and bullet being positioned into the bore hole before drilling has begun, according to an embodiment of the present invention;
Figure 7 is a front cutaway view of the setting tool being hammered and drilled within the anchor, the anchor spreading over the bullet during the setting of the anchor, according to an embodiment of the present invention;
2 Figure 8 is a front cutaway view of the anchor set in an undercut position within the pre-drilled bore hole and the setting tool being removed from the anchor after drilling has been completed, according to an embodiment of the present invention;
3 DETAILED DESCRIPTION
The following embodiments are merely illustrative and are not intended to be limiting. It will be appreciated that various modifications and/or alterations to the embodiments described herein may be made without departing from the disclosure and any modifications and/or alterations are within the scope of the contemplated disclosure.
With reference to Figures 1, 2 and 3 and according to an embodiment of the present disclosure, a self-undercut expansion anchor system 10 for use in a pre-drilled bore holes is shown, preferably comprising an improved anchor 15 and a bullet 20. The anchor 15 is further comprised of at least two angular cutters 25 positioned at a lower end of the anchor 15. Although this preferred embodiment describes four cutters 25, a worker skilled in the art would understand that any number of cutters are possible, although four cutters have been shown to be optimal. A worker skilled in the art would appreciate that the cutters 25 could be in the form of brazed carbide on the anchor 15, without departing from the scope of the disclosure. The anchor 15 is also comprised of at least two, and preferably four, slits 30 positioned at the lower end of the anchor 15. As shown, the four slits 30 are positioned equidistantly from one another on the anchor 15.
The slits 30 run up along the length of the anchor 15, from the lower end of the anchor 15 until approximately halfway up the anchor 15. As shown, the slits 30 are preferably positioned in between adjacent cutters 25. A worker skilled in the art would appreciate that the slits 30 allow for the lower end of the anchor 15 to spread radially over the bullet 20 during setting of the anchor 15. In another embodiment of
The following embodiments are merely illustrative and are not intended to be limiting. It will be appreciated that various modifications and/or alterations to the embodiments described herein may be made without departing from the disclosure and any modifications and/or alterations are within the scope of the contemplated disclosure.
With reference to Figures 1, 2 and 3 and according to an embodiment of the present disclosure, a self-undercut expansion anchor system 10 for use in a pre-drilled bore holes is shown, preferably comprising an improved anchor 15 and a bullet 20. The anchor 15 is further comprised of at least two angular cutters 25 positioned at a lower end of the anchor 15. Although this preferred embodiment describes four cutters 25, a worker skilled in the art would understand that any number of cutters are possible, although four cutters have been shown to be optimal. A worker skilled in the art would appreciate that the cutters 25 could be in the form of brazed carbide on the anchor 15, without departing from the scope of the disclosure. The anchor 15 is also comprised of at least two, and preferably four, slits 30 positioned at the lower end of the anchor 15. As shown, the four slits 30 are positioned equidistantly from one another on the anchor 15.
The slits 30 run up along the length of the anchor 15, from the lower end of the anchor 15 until approximately halfway up the anchor 15. As shown, the slits 30 are preferably positioned in between adjacent cutters 25. A worker skilled in the art would appreciate that the slits 30 allow for the lower end of the anchor 15 to spread radially over the bullet 20 during setting of the anchor 15. In another embodiment of
4 the anchor 15, an annular recess may be positioned in the area where the slit terminates halfway up the anchor 15. Such an annular recess may facilitate the spreading of the cutters 25 and the lower end of the anchor 15 positioned below the such an annular recess. The anchor IS is also comprised of at least one locking aperture 31 positioned at an upper end of the anchor 15. Such a locking aperture 31 facilitates mating with a setting tool (not shown). As specifically shown in Figure 2, the anchor 15 has a partially threaded hollow inner diameter 32 to receive the setting tool (not shown), a fixture (not shown), or the bullet 20 as described below. Indeed, a bullet 20 is shown connected to the anchor 15, the bullet 20 preferably bell-shaped and further comprising a neck 35 and a trapezoid-shaped body 40 terminating in a cone-shaped tip 45. The neck 35 of the bullet 20 is connected to and positioned within the lower end of the anchor 15, as specifically shown in Figure 2. As will be described, during the setting of the anchor 15, the lower end of the anchor 15 spreads radially over the body 40 of the bullet 20 to secure the anchor 15 and the bullet 20 within the bore hole.
With reference to Figure 4 and according to an embodiment of the present disclosure, one of the cutters 25 of the anchor 15 is shown in greater detail. As shown, each cutter 25 has a sloped cutting surface 50, each sloped cutting surface 50 having an optimal cutting angle 0 of at least 50. The optimal cutting angle 0 has been shown to perform optimally when cutting and boring through the cementuous material of the pre-drilled bore hole, to optimize the strength of the anchor 15 and optimally set the anchor 15 in an undercut position in the pre-drilled bore hole. In an alternate embodiment, the sloped cutting surface 50 could slope from each side and terminate to form a notch or triangular shape, provided that each taper is at least 50.
With reference to Figure 5 and according to an embodiment of the present disclosure, the bullet 20 is shown connected to the anchor 15, with a setting tool 80 about to be inserted within the hollow inner diameter 32 of the anchor 15. In turn, the anchor 15 and bullet 20 are about to be inserted within the bore hole 85.
With reference to Figures 6, 7 and 8, the anchor 15 is shown being set over the bullet 20 and within the bore hole 85.
With specific reference to Figure 6, the anchor 15 and bullet 20 are within the bore hole 85. Meanwhile, the setting tool 80 is inserted within the hollow inner diameter 32 of the anchor 15, and the neck 35 of the bullet 20 is connected to the lower end of the anchor 15. The cutters 25 have not yet cut or bore into the cementuous material. With specific reference to Figure 7, a hammer drill or other impact tool as known in the art acts on the setting tool 80 to hammer and rotate the setting tool 80 and in turn the anchor 15. As the anchor 15 is driven downwardly into the bore hole 85, the lower end of the anchor 15 begins to expand over the bullet 20. The slits (not shown) facilitate the expansion of the anchor 15 over the bullet 20, and the cutters 25 cut and bore through the cementous material to enlarge in the pre-drilled bore hole 85. With specific reference to Figure 8, the anchor 15 has been maximally expanded over the bullet 20 and is set in an undercut position. As shown in this undercut position, the diameter of the set anchor 15 is wider than the diameter of the pre-drilled bore hole 85 and thusly secured therein.
The setting tool 80 is removed from the hollow inner diameter 32 of the anchor 15 and an operator can then insert a threaded component, such as a fixture, into the anchor 15.
Many modifications of the embodiments described herein as well as other embodiments may be evident to a person skilled in the art having the benefit of the teachings presented in the foregoing description and associated drawings. It is understood that these modifications and additional embodiments are captured within the scope of the contemplated disclosure which is not to be limited to the specific embodiment disclosed.
With reference to Figure 4 and according to an embodiment of the present disclosure, one of the cutters 25 of the anchor 15 is shown in greater detail. As shown, each cutter 25 has a sloped cutting surface 50, each sloped cutting surface 50 having an optimal cutting angle 0 of at least 50. The optimal cutting angle 0 has been shown to perform optimally when cutting and boring through the cementuous material of the pre-drilled bore hole, to optimize the strength of the anchor 15 and optimally set the anchor 15 in an undercut position in the pre-drilled bore hole. In an alternate embodiment, the sloped cutting surface 50 could slope from each side and terminate to form a notch or triangular shape, provided that each taper is at least 50.
With reference to Figure 5 and according to an embodiment of the present disclosure, the bullet 20 is shown connected to the anchor 15, with a setting tool 80 about to be inserted within the hollow inner diameter 32 of the anchor 15. In turn, the anchor 15 and bullet 20 are about to be inserted within the bore hole 85.
With reference to Figures 6, 7 and 8, the anchor 15 is shown being set over the bullet 20 and within the bore hole 85.
With specific reference to Figure 6, the anchor 15 and bullet 20 are within the bore hole 85. Meanwhile, the setting tool 80 is inserted within the hollow inner diameter 32 of the anchor 15, and the neck 35 of the bullet 20 is connected to the lower end of the anchor 15. The cutters 25 have not yet cut or bore into the cementuous material. With specific reference to Figure 7, a hammer drill or other impact tool as known in the art acts on the setting tool 80 to hammer and rotate the setting tool 80 and in turn the anchor 15. As the anchor 15 is driven downwardly into the bore hole 85, the lower end of the anchor 15 begins to expand over the bullet 20. The slits (not shown) facilitate the expansion of the anchor 15 over the bullet 20, and the cutters 25 cut and bore through the cementous material to enlarge in the pre-drilled bore hole 85. With specific reference to Figure 8, the anchor 15 has been maximally expanded over the bullet 20 and is set in an undercut position. As shown in this undercut position, the diameter of the set anchor 15 is wider than the diameter of the pre-drilled bore hole 85 and thusly secured therein.
The setting tool 80 is removed from the hollow inner diameter 32 of the anchor 15 and an operator can then insert a threaded component, such as a fixture, into the anchor 15.
Many modifications of the embodiments described herein as well as other embodiments may be evident to a person skilled in the art having the benefit of the teachings presented in the foregoing description and associated drawings. It is understood that these modifications and additional embodiments are captured within the scope of the contemplated disclosure which is not to be limited to the specific embodiment disclosed.
Claims (2)
1.A self-undercut expansion anchor system for use in a pre-drilled bore hole, comprising:
an anchor further comprised of at least two angular cutters positioned at a lower end of the anchor and separated by a slit, to cut through a material of the pre-drilled bore hole; and, a bullet connected to the anchor to provide a surface on which the cutters positioned at a lower end of the anchor can expand and radially cut into the pre-drilled bore hole, wherein the lower end of the anchor expands radially over the bullet to set the system in the pre-drilled bore hole.
an anchor further comprised of at least two angular cutters positioned at a lower end of the anchor and separated by a slit, to cut through a material of the pre-drilled bore hole; and, a bullet connected to the anchor to provide a surface on which the cutters positioned at a lower end of the anchor can expand and radially cut into the pre-drilled bore hole, wherein the lower end of the anchor expands radially over the bullet to set the system in the pre-drilled bore hole.
2.Any invention as may be defined in the above description.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3005347A CA3005347A1 (en) | 2018-05-18 | 2018-05-18 | Self-undercut expansion anchor system with bore cutters |
| US16/955,322 US20210087932A1 (en) | 2018-05-18 | 2019-05-17 | Self-undercut expansion anchor system with improved cutters |
| PCT/CA2019/050685 WO2019218090A1 (en) | 2018-05-18 | 2019-05-17 | Self-undercut expansion anchor system with improved cutters |
| CA3100241A CA3100241A1 (en) | 2018-05-18 | 2019-05-17 | Self-undercut expansion anchor system with improved cutters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA3005347A CA3005347A1 (en) | 2018-05-18 | 2018-05-18 | Self-undercut expansion anchor system with bore cutters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA3005347A1 true CA3005347A1 (en) | 2019-11-18 |
Family
ID=68615452
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA3005347A Abandoned CA3005347A1 (en) | 2018-05-18 | 2018-05-18 | Self-undercut expansion anchor system with bore cutters |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA3005347A1 (en) |
-
2018
- 2018-05-18 CA CA3005347A patent/CA3005347A1/en not_active Abandoned
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20220301 |