CA2929995A1 - Marking system & method for use in concrete anchors - Google Patents
Marking system & method for use in concrete anchors Download PDFInfo
- Publication number
- CA2929995A1 CA2929995A1 CA2929995A CA2929995A CA2929995A1 CA 2929995 A1 CA2929995 A1 CA 2929995A1 CA 2929995 A CA2929995 A CA 2929995A CA 2929995 A CA2929995 A CA 2929995A CA 2929995 A1 CA2929995 A1 CA 2929995A1
- Authority
- CA
- Canada
- Prior art keywords
- anchor
- marking system
- rib
- collar
- bullet
- 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
- 238000000034 method Methods 0.000 title claims description 6
- 230000001050 lubricating effect Effects 0.000 claims abstract description 7
- 239000000126 substance Substances 0.000 claims abstract description 5
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- 230000000007 visual effect Effects 0.000 claims description 6
- 230000007480 spreading Effects 0.000 claims description 3
- 238000012790 confirmation Methods 0.000 claims description 2
- 239000003973 paint Substances 0.000 claims description 2
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000004075 alteration Effects 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical group S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C5/00—Reinforcing elements, e.g. for concrete; Auxiliary elements therefor
- E04C5/08—Members specially adapted to be used in prestressed constructions
- E04C5/12—Anchoring devices
- E04C5/125—Anchoring devices the tensile members are profiled to ensure the anchorage, e.g. when provided with screw-thread, bulges, corrugations
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/41—Connecting devices specially adapted for embedding in concrete or masonry
- E04B1/4107—Longitudinal elements having an open profile, with the opening parallel to the concrete or masonry surface, i.e. anchoring rails
-
- 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
- F16B13/08—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 with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation
- F16B13/0858—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 with separate or non-separate gripping parts moved into their final position in relation to the body of the device without further manual operation with an expansible sleeve or dowel body driven against a tapered or spherical expander plug
-
- 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
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/95—Constructional details of connections not covered for in other groups of this subclass with markings, colours, indicators or the like
Abstract
The present invention provides for a marking system for use in concrete anchors, wherein the system is comprised of a setting tool with a rib to contact the anchor.
Upon contact, the setting tool and the rib abrade a surface of the anchor and simultaneously create a score mark in order to indicate to the user of the concrete anchor that said anchor has been properly set. The entire anchor can also be pre-dipped into a lubricating substance to further facilitate the setting of the anchor.
Upon contact, the setting tool and the rib abrade a surface of the anchor and simultaneously create a score mark in order to indicate to the user of the concrete anchor that said anchor has been properly set. The entire anchor can also be pre-dipped into a lubricating substance to further facilitate the setting of the anchor.
Description
MARKING SYSTEM & METHOD FOR USE IN CONCRETE
ANCHORS
FIELD
The invention relates to anchors and, more specifically, to marking systems to assist in the setting of such concrete anchors.
BRIEF DESCRIPTON OF 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 partial cross-sectional view of a marking system for use in concrete anchors in a bore hole according to an embodiment of the present disclosure;
Figure 1A is the first stage of the anchor setting process as shown in Figure 1 and according to an embodiment of the present disclosure;
Figure 1B is the second stage of the anchor setting process as shown in Figure 1 and according to an embodiment of the present disclosure;
Figure 1C is the third stage of the anchor setting process as shown in Figure 1 and according to an embodiment of the present disclosure;
Figure 2A is a lower perspective view of an underside of a collar of the setting tool shown according to another embodiment of the present disclosure; and, Figure 2B lower perspective view of an underside of a collar of the setting tool shown according to yet another embodiment of the present disclosure.
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 Figure 1 and according to an embodiment of the present disclosure, a marking system 5 for use in drop-in anchors is shown, having an anchor 10 positioned in a pre-drilled bore hole 15 typically found in cementitious materials 17. The marking system 5 is generally comprised of an anchor 10 further comprised of a hollow shell 20, which is terminated in spreading lamellae 25 which serve to spread outwardly and secure the anchor in the bore hole 15. A bullet 35 is positioned within hollow shell 20 of the anchor 10 to set said anchor 10 by spreading the lamellae 25 outwardly during setting. A
setting tool 50 is also provided to drive the bullet 35 downwardly, further comprised a collar 52, at least one pyramidally-shaped rib 54 positioned on a lower surface of the collar 52, and a tip 56 to contact the bullet 35. A worker skilled in the art would appreciate that two or more ribs 54 could be provided to increase the likelihood that a user of the marking system 5 would see the score mark (not shown) created on the anchor and further facilitate the setting of the anchor 10, or of a fastener or set screw to provide the same functionality. In this embodiment, the rib 54 could be machined into the collar 52 of the setting tool 50 but could also be brazed thereon and be comprised of carbide. In this particular embodiment, the upper surface 60 of the shell 20 is comprised of an abradable coating, which is abraded when the upper surface 60 of the anchor 10 and the collar 52 of the setting tool 50 repeatedly contact one another when driving the bullet 35 downwardly to set the anchor 10. A worker skilled in the art would also appreciate that the rib 54 could be constructed of carbide and soldered thereon, or the rib 54 would be machined together with the setting tool 50 as one piece. During operation, when the collar 52 and the rib 54 of the setting tool 50 contact an upper surface 60 of the anchor 10, the rib 54 will dent the upper surface 60 and create a score mark (not shown) thereon, acting as a first visual indicator that the anchor 10 has been set. As was explained above, the abradable coating on the upper surface 60 of the anchor 10 will also become abraded, which will serve as a second visual indicator that the anchor 10 has been set.
The operation of the marking system 5 is further described below. A worker skilled in the art would appreciate that in one embodiment, the abradable coating could be paint.
With reference to Figures 1A, 1B and 1C and according to an embodiment of the present disclosure, the marking system 5 is shown in three stages of setting the anchor 10. The first stage specifically shown in Figure 1A shows the alignment between the tip 56 of the setting tool 50 and an opening 61 of the anchor 10. Meanwhile, the collar 52 and rib 54 positioned on the collar 52 of the setting tool 50 are aligned with the upper surface 60 of the anchor 10. With specific reference to Figure 1B and according to a second stage of setting the anchor 10, the collar 52 is flush with the upper surface 60 of the anchor 10, and the rib 54 has created a score mark (not shown) on the upper surface 60.
With specific reference to Figure 1C and according to a third stage of setting the anchor 10, score mark 65 is shown having been created on the upper surface 60 of the anchor 10.
The score mark 65 is obviously aligned with the rib 54. A worker skilled in the art of such anchors would appreciate that the three stages must be done sequentially in order for the anchor 10 to set properly, and for the score mark 65 to be most visible to an installer of the anchor 10. A worker skilled in the art would also appreciate that in the case of a manual installation without a drill, a hand setting tool could be used and would require a worker to strike the anchor a few less times and still provide the advantages as described above.
With further reference to Figures 1, 1A, 1B and 1C, in order to set the anchor 10, the steps are: positioning the anchor shell 20 further comprised of an abradable upper surface 60 and a bullet 35 within a bore hole 15, striking the anchor 10 and bullet 35 with a setting tool 50 further comprised of a rib 54, wherein the striking of the anchor 10 will create a score mark 65 on the upper surface 60 of the anchor 10 to provide visual confirmation that the anchor 10 has been set.
With reference to Figures 2A and 2B and according to another embodiment of the present disclosure, either one rib 54 or two ribs 54 are shown, positioned on an underside 70 of the collar 52. The underside 70 of the collar 52 is further comprised of a stepped male portion 75, which serves to mate with an annular female recession (not shown) of the upper surface (not shown) of the anchor (not shown). During the downward driving of the anchor 10, the stepped make portion 75 mates with the annular female recession (not shown) while the rib 54 contacts and creates a score mark (not shown) on the upper surface (not shown) of the anchor (not shown). A worker skilled in the art would appreciate that this male-female relationship is known in the art, although in this embodiment the upper surface (not shown) of the anchor (not shown) including the annular female recession (not shown) are comprised of an abradable coating as detailed above.
A worker skilled in the art would also appreciate that in another embodiment of the present disclosure, the entire anchor 10 comprised of the bullet 35 therein could be dipped, submerged or coated in a lubricating substance, or just the bullet 35 alone.
Preferably, the lubricating substance is molybdenum disulfide or graphite which are dry lubricants ideal for this purpose, or another similar lubricant known in the art. In another embodiment, the lubricating substance could be paste such as grease in order to save on costs while still providing the advantage of an easier setting of the anchor 10 by the bullet 35 sliding downwardly therein. In yet another embodiment of the present disclosure, a worker skilled in the art would appreciate that a lubricating member (not shown) could be positioned within the anchor shell 20, above or below the bullet 35. In such an embodiment, downwardly driving of the bullet 35 would engender a corresponding compression of the lubricating member (not shown) which would lubricate the bullet 35 and the inside of the anchor 10 to facilitate the setting of the anchor 10.
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 invention which is not to be limited to the specific embodiment disclosed.
ANCHORS
FIELD
The invention relates to anchors and, more specifically, to marking systems to assist in the setting of such concrete anchors.
BRIEF DESCRIPTON OF 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 partial cross-sectional view of a marking system for use in concrete anchors in a bore hole according to an embodiment of the present disclosure;
Figure 1A is the first stage of the anchor setting process as shown in Figure 1 and according to an embodiment of the present disclosure;
Figure 1B is the second stage of the anchor setting process as shown in Figure 1 and according to an embodiment of the present disclosure;
Figure 1C is the third stage of the anchor setting process as shown in Figure 1 and according to an embodiment of the present disclosure;
Figure 2A is a lower perspective view of an underside of a collar of the setting tool shown according to another embodiment of the present disclosure; and, Figure 2B lower perspective view of an underside of a collar of the setting tool shown according to yet another embodiment of the present disclosure.
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 Figure 1 and according to an embodiment of the present disclosure, a marking system 5 for use in drop-in anchors is shown, having an anchor 10 positioned in a pre-drilled bore hole 15 typically found in cementitious materials 17. The marking system 5 is generally comprised of an anchor 10 further comprised of a hollow shell 20, which is terminated in spreading lamellae 25 which serve to spread outwardly and secure the anchor in the bore hole 15. A bullet 35 is positioned within hollow shell 20 of the anchor 10 to set said anchor 10 by spreading the lamellae 25 outwardly during setting. A
setting tool 50 is also provided to drive the bullet 35 downwardly, further comprised a collar 52, at least one pyramidally-shaped rib 54 positioned on a lower surface of the collar 52, and a tip 56 to contact the bullet 35. A worker skilled in the art would appreciate that two or more ribs 54 could be provided to increase the likelihood that a user of the marking system 5 would see the score mark (not shown) created on the anchor and further facilitate the setting of the anchor 10, or of a fastener or set screw to provide the same functionality. In this embodiment, the rib 54 could be machined into the collar 52 of the setting tool 50 but could also be brazed thereon and be comprised of carbide. In this particular embodiment, the upper surface 60 of the shell 20 is comprised of an abradable coating, which is abraded when the upper surface 60 of the anchor 10 and the collar 52 of the setting tool 50 repeatedly contact one another when driving the bullet 35 downwardly to set the anchor 10. A worker skilled in the art would also appreciate that the rib 54 could be constructed of carbide and soldered thereon, or the rib 54 would be machined together with the setting tool 50 as one piece. During operation, when the collar 52 and the rib 54 of the setting tool 50 contact an upper surface 60 of the anchor 10, the rib 54 will dent the upper surface 60 and create a score mark (not shown) thereon, acting as a first visual indicator that the anchor 10 has been set. As was explained above, the abradable coating on the upper surface 60 of the anchor 10 will also become abraded, which will serve as a second visual indicator that the anchor 10 has been set.
The operation of the marking system 5 is further described below. A worker skilled in the art would appreciate that in one embodiment, the abradable coating could be paint.
With reference to Figures 1A, 1B and 1C and according to an embodiment of the present disclosure, the marking system 5 is shown in three stages of setting the anchor 10. The first stage specifically shown in Figure 1A shows the alignment between the tip 56 of the setting tool 50 and an opening 61 of the anchor 10. Meanwhile, the collar 52 and rib 54 positioned on the collar 52 of the setting tool 50 are aligned with the upper surface 60 of the anchor 10. With specific reference to Figure 1B and according to a second stage of setting the anchor 10, the collar 52 is flush with the upper surface 60 of the anchor 10, and the rib 54 has created a score mark (not shown) on the upper surface 60.
With specific reference to Figure 1C and according to a third stage of setting the anchor 10, score mark 65 is shown having been created on the upper surface 60 of the anchor 10.
The score mark 65 is obviously aligned with the rib 54. A worker skilled in the art of such anchors would appreciate that the three stages must be done sequentially in order for the anchor 10 to set properly, and for the score mark 65 to be most visible to an installer of the anchor 10. A worker skilled in the art would also appreciate that in the case of a manual installation without a drill, a hand setting tool could be used and would require a worker to strike the anchor a few less times and still provide the advantages as described above.
With further reference to Figures 1, 1A, 1B and 1C, in order to set the anchor 10, the steps are: positioning the anchor shell 20 further comprised of an abradable upper surface 60 and a bullet 35 within a bore hole 15, striking the anchor 10 and bullet 35 with a setting tool 50 further comprised of a rib 54, wherein the striking of the anchor 10 will create a score mark 65 on the upper surface 60 of the anchor 10 to provide visual confirmation that the anchor 10 has been set.
With reference to Figures 2A and 2B and according to another embodiment of the present disclosure, either one rib 54 or two ribs 54 are shown, positioned on an underside 70 of the collar 52. The underside 70 of the collar 52 is further comprised of a stepped male portion 75, which serves to mate with an annular female recession (not shown) of the upper surface (not shown) of the anchor (not shown). During the downward driving of the anchor 10, the stepped make portion 75 mates with the annular female recession (not shown) while the rib 54 contacts and creates a score mark (not shown) on the upper surface (not shown) of the anchor (not shown). A worker skilled in the art would appreciate that this male-female relationship is known in the art, although in this embodiment the upper surface (not shown) of the anchor (not shown) including the annular female recession (not shown) are comprised of an abradable coating as detailed above.
A worker skilled in the art would also appreciate that in another embodiment of the present disclosure, the entire anchor 10 comprised of the bullet 35 therein could be dipped, submerged or coated in a lubricating substance, or just the bullet 35 alone.
Preferably, the lubricating substance is molybdenum disulfide or graphite which are dry lubricants ideal for this purpose, or another similar lubricant known in the art. In another embodiment, the lubricating substance could be paste such as grease in order to save on costs while still providing the advantage of an easier setting of the anchor 10 by the bullet 35 sliding downwardly therein. In yet another embodiment of the present disclosure, a worker skilled in the art would appreciate that a lubricating member (not shown) could be positioned within the anchor shell 20, above or below the bullet 35. In such an embodiment, downwardly driving of the bullet 35 would engender a corresponding compression of the lubricating member (not shown) which would lubricate the bullet 35 and the inside of the anchor 10 to facilitate the setting of the anchor 10.
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 invention which is not to be limited to the specific embodiment disclosed.
Claims (10)
1. A marking system for use in drop-in anchors comprising:
a. an anchor further comprised of an upper surface and spreading lamellae;
b. a bullet positioned in the anchor to set the anchor;
c. a setting tool to drive the bullet downwardly further comprised of:
i. a collar; and, ii. a rib positioned on the collar;
wherein the collar and rib of the setting tool contact the upper surface of the anchor to create a score mark on the upper surface which provides a visual indicator that the anchor has been set.
a. an anchor further comprised of an upper surface and spreading lamellae;
b. a bullet positioned in the anchor to set the anchor;
c. a setting tool to drive the bullet downwardly further comprised of:
i. a collar; and, ii. a rib positioned on the collar;
wherein the collar and rib of the setting tool contact the upper surface of the anchor to create a score mark on the upper surface which provides a visual indicator that the anchor has been set.
2. The marking system of Claim 1 wherein the collar is further comprised of at least two ribs.
3. The marking system of Claim 1 wherein the upper surface of the anchor is further comprised of an abradable coating, the abradable coating serving as a second visual indicator that the anchor has been set.
4. The marking system of Claim 3 wherein the abradable coating is paint.
5. The marking system of Claim 1 wherein the rib is pyramidally-shaped.
6. The marking system of Claim 1 wherein the anchor and bullet have been coated with a lubricating substance.
7. The marking system of Claim 1 wherein the collar is further comprised of a fastener and set screw.
8. The marking system of Claim 1 wherein the rib is a brazed carbide on the collar.
9. A method of setting an anchor, the steps comprising:
a. positioning an anchor shell further comprised of an abradable upper surface and a bullet within a bore hole;
b. striking the anchor and bullet with a setting tool further comprised of a rib;
wherein the striking of the anchor will create a score mark on the upper surface of the anchor to provide visual confirmation that the anchor has been set.
a. positioning an anchor shell further comprised of an abradable upper surface and a bullet within a bore hole;
b. striking the anchor and bullet with a setting tool further comprised of a rib;
wherein the striking of the anchor will create a score mark on the upper surface of the anchor to provide visual confirmation that the anchor has been set.
10. Any invention as may be defined in the above description.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2929995A CA2929995A1 (en) | 2016-05-16 | 2016-05-16 | Marking system & method for use in concrete anchors |
| US15/596,541 US20170328066A1 (en) | 2016-05-16 | 2017-05-16 | Marking System & Method For Use In Concrete Anchors |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA2929995A CA2929995A1 (en) | 2016-05-16 | 2016-05-16 | Marking system & method for use in concrete anchors |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2929995A1 true CA2929995A1 (en) | 2017-11-16 |
Family
ID=60294492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA2929995A Abandoned CA2929995A1 (en) | 2016-05-16 | 2016-05-16 | Marking system & method for use in concrete anchors |
Country Status (2)
| Country | Link |
|---|---|
| US (1) | US20170328066A1 (en) |
| CA (1) | CA2929995A1 (en) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3486402A (en) * | 1968-11-14 | 1969-12-30 | Samuel G Dunlap | Bolthead marking device |
| US4073212A (en) * | 1976-10-15 | 1978-02-14 | Wej-It Corporation | Anchor bolt with visual engagement indicator |
| US5746556A (en) * | 1995-03-13 | 1998-05-05 | Kabushiki Kaisha Youma Kohboh | Anchor unit with expansive anchor member expanded by utilizing turning force of bolt |
| DE19613999A1 (en) * | 1996-04-09 | 1997-10-16 | Hilti Ag | Tool with marking element |
| US6484471B2 (en) * | 2000-03-22 | 2002-11-26 | Patent Applied Technology | Adhesive fixed anchors |
| US6935811B2 (en) * | 2002-11-13 | 2005-08-30 | Terrasimco Inc. | Frictional mining bolt |
| US8974163B2 (en) * | 2008-09-09 | 2015-03-10 | Mechanical Plastics Corp. | Wedge-type drop-in anchor assembly |
| US8540469B2 (en) * | 2010-06-10 | 2013-09-24 | Black & Decker Inc. | Drop-in anchor |
| US20130170900A1 (en) * | 2012-01-04 | 2013-07-04 | Clean-Shot Archery, Inc. | Glueless joining devices for interlocking with hollow shafts |
-
2016
- 2016-05-16 CA CA2929995A patent/CA2929995A1/en not_active Abandoned
-
2017
- 2017-05-16 US US15/596,541 patent/US20170328066A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| US20170328066A1 (en) | 2017-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |
Effective date: 20220809 |
|
| FZDE | Discontinued |
Effective date: 20220809 |