US2524480A - Bolt anchorage - Google Patents
Bolt anchorage Download PDFInfo
- Publication number
- US2524480A US2524480A US61249A US6124948A US2524480A US 2524480 A US2524480 A US 2524480A US 61249 A US61249 A US 61249A US 6124948 A US6124948 A US 6124948A US 2524480 A US2524480 A US 2524480A
- Authority
- US
- United States
- Prior art keywords
- coil
- anchorage
- strip
- concrete
- bolt
- 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 - Lifetime
Links
- 239000004567 concrete Substances 0.000 description 13
- 239000002184 metal Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Images
Classifications
-
- 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/12—Nuts or like thread-engaging members with thread-engaging surfaces formed by inserted coil-springs, discs, or the like; Independent pieces of wound wire used as nuts; Threaded inserts for holes
-
- 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
Definitions
- Claim (Cl. 85-32) This invention relates to anchorages for bolts and other threaded elements in concrete or similar plastic masses.
- An object of the invention is to provide a device of this character which will threadably receive the bolt and hold it rmly in place under hard conditions of service.
- the primary object of the present invention is to provide a threaded anchorage of such a character which will be, because of its improved design and construction more firmly anchored in the concrete mass so that its dislodgment will be virtually impossible without destruction of the surrounding portions of the concrete in which it is embedded.
- the invention further contemplates the provision of an article of this character which can be speedily and economically made in quantity; which can be readily placed in position, and after the concrete has hardened or set, will act as a rm and secure anchorage for the bolt.
- Fig. 1 is a vertical sectional View through a part of a concrete mass showing the anchorage embedded therein and in engagement with the threaded portion of a bolt or similar threaded member;
- Fig. 2 is an end view of the helical anchorage;
- Fig. 3 is a side elevation of the same, and
- Fig. 4 is a face View of the metallic strip from which the coil or helix is formed.
- the anchorage is preferably formed from an elongated strip I of flat sheet metal of the form generally shown in Fig. 4.
- the length of the strip from which the coillike anchorage is produced is, of course, dependent upon the desired length of the anchorage.
- the strip is provided with one longitudinal straight edge 2, the opposite edge 3 being undulated or formed with decidedly flat, spaced serrations.
- the strip formed as above described is Wound or shaped into helical or spiral form, as clearly shown in Fig. 3.
- the helix or spiral so produced has its inside diameter or inner edge composed of the straight edge 2 of the strip I and hence the inside diameter of the coil 2 or helix, or the bore thereof, will be of uniform or constant diameter.
- the diameter of the coil thus formed will, of course, be that intended to permit of threadable engagement with the threaded portion 5 at the end of a bolt 6 or other threaded element, and the length of the coil will be that required to accommodate the threaded portion of the bolt.
- the end convolution of the coil is inwardly bent or distorted as shown at 'l to form a limiting abutment for the pointed end of the bolt 6.
- the undulated edge 3 of the strip I is that which forms the outer edge of the formed coil or helix, and as a result, the outside diameter of the coil or helix is varied. That is to say, the shape of the coil is that of a plurality of frusto-conical members connected endwisely. It will be also noted that the convolutions of the helix or coil are spaced apart, acy cording to the threads to be accommodated, and that concrete in which the coil is embedded can enter between these convolutions and rest against the flat faces 9 thereof.
- the arrangement described is such that it is impossible to withdraw the coil out of the concrete by axial movementpf the coil as well as extremely diicult, if not impossible, to rotate the coil in the concrete mass.
- the conical disposition of the coils of the helix tends to furnish a positive bearing on a larger area of con- -crete and insures a better lling of the voids between the turns in the narrow parts of the coil.
- the strip from which the coil is made as being fabricated from at metal, it is apparent that it might be other- Wise formed, as for example, from wire made possibly triangulated in cross-sectional shape and having one edge undulated as described with respect to the embodiment shown in the drawing.
- An anchorage for insertion in concrete or material of like character comprising, a iiat metal strip having a straight lengitedinal aise and e 3 longitudinal edge of undulated form, said strip REFERENCES CITED being coiled into a spiral having spaced-apart
- the following references are of record in the convolutions, the outside diameter of the coiled me of this patent:
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Tubular Articles Or Embedded Moulded Articles (AREA)
Description
T. c. scHENK 2,524,480
Bour ANcHoRAGE Oct. 3, 1950 Filed Nov. 20l 1948 lNVENTOR Patented ct. 3, 1950 jUNITED S1`A"II 3Sv PATENT OFF-ICE' i t 2,524,480 j" y "l BOLT ANCHORAGE Tamis C. Schenk, Richmond Hill, N. Y.
Application November 20, 1948, Serial No. 61,249
1 Claim (Cl. 85-32) This invention relates to anchorages for bolts and other threaded elements in concrete or similar plastic masses. An object of the invention is to provide a device of this character which will threadably receive the bolt and hold it rmly in place under hard conditions of service.
I am aware that prior to the present invention, eiiorts have been made to embed in concrete masses, threaded spirals or helicals for the reception of the threaded end portions of bolts or like elements, and the primary object of the present invention is to provide a threaded anchorage of such a character which will be, because of its improved design and construction more firmly anchored in the concrete mass so that its dislodgment will be virtually impossible without destruction of the surrounding portions of the concrete in which it is embedded.
The invention further contemplates the provision of an article of this character which can be speedily and economically made in quantity; which can be readily placed in position, and after the concrete has hardened or set, will act as a rm and secure anchorage for the bolt.
These and other objects are attained by the invention, a more particular description f which will be hereinafter set forth and pointed out in the claim appended hereto.
In the accompanying drawing, wherein an illustrative embodiment of the invention is disclosed, Fig. 1 is a vertical sectional View through a part of a concrete mass showing the anchorage embedded therein and in engagement with the threaded portion of a bolt or similar threaded member; Fig. 2 is an end view of the helical anchorage; Fig. 3 is a side elevation of the same, and Fig. 4 is a face View of the metallic strip from which the coil or helix is formed.
Referring to the embodiment of the invention illustrated in the drawing, the anchorage is preferably formed from an elongated strip I of flat sheet metal of the form generally shown in Fig. 4. The length of the strip from which the coillike anchorage is produced is, of course, dependent upon the desired length of the anchorage. In the form shown, the strip is provided with one longitudinal straight edge 2, the opposite edge 3 being undulated or formed with decidedly flat, spaced serrations. The strip formed as above described is Wound or shaped into helical or spiral form, as clearly shown in Fig. 3. The helix or spiral so produced has its inside diameter or inner edge composed of the straight edge 2 of the strip I and hence the inside diameter of the coil 2 or helix, or the bore thereof, will be of uniform or constant diameter.
The diameter of the coil thus formed will, of course, be that intended to permit of threadable engagement with the threaded portion 5 at the end of a bolt 6 or other threaded element, and the length of the coil will be that required to accommodate the threaded portion of the bolt. At one end, the end convolution of the coil is inwardly bent or distorted as shown at 'l to form a limiting abutment for the pointed end of the bolt 6.
:It will be noted that the undulated edge 3 of the strip I is that which forms the outer edge of the formed coil or helix, and as a result, the outside diameter of the coil or helix is varied. That is to say, the shape of the coil is that of a plurality of frusto-conical members connected endwisely. It will be also noted that the convolutions of the helix or coil are spaced apart, acy cording to the threads to be accommodated, and that concrete in which the coil is embedded can enter between these convolutions and rest against the flat faces 9 thereof.
When an anchorage coil of this character is embedded in a concrete mass, the concrete will flow around the same and enter between the convolutions of the coil as well as around the undulating surfaces dened by the outer edge of the coil.
The arrangement described is such that it is impossible to withdraw the coil out of the concrete by axial movementpf the coil as well as extremely diicult, if not impossible, to rotate the coil in the concrete mass. The conical disposition of the coils of the helix tends to furnish a positive bearing on a larger area of con- -crete and insures a better lling of the voids between the turns in the narrow parts of the coil.
While I have herein described the strip from which the coil is made as being fabricated from at metal, it is apparent that it might be other- Wise formed, as for example, from wire made possibly triangulated in cross-sectional shape and having one edge undulated as described with respect to the embodiment shown in the drawing.
While I have herein described one embodiment o f the invention, it is obvious that the same is not to be restricted thereto but is broad enough to cover all structures coming within the scope of the annexed claim.
What I claim is:
An anchorage for insertion in concrete or material of like character comprising, a iiat metal strip having a straight lengitedinal aise and e 3 longitudinal edge of undulated form, said strip REFERENCES CITED being coiled into a spiral having spaced-apart The following references are of record in the convolutions, the outside diameter of the coiled me of this patent:
strip being gradually increased or decreased in diameter according to the undulations of said 5 UNITED STATES PATENTS outside edge, the straight edge of the strip form- Number Name Date ing the inside edge of the spiral and providing a 163,485 Hansen May 18, 1875 constant and uniform inside diameter for said 240,780 Smith Apr. 26, 1881 spiral and adapted to form a spiral thread fOr a 271,929 Seybert Feb. 6, 1883 threadedrmember; inserted within the coil. f 10v 1,230,603 Richmond` June 19, 1917 1,311,646 Gordon June 29, 1919 TAMIS C. SCHENK.A I 2,439,685 Findley Apr. 13, 1948
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61249A US2524480A (en) | 1948-11-20 | 1948-11-20 | Bolt anchorage |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US61249A US2524480A (en) | 1948-11-20 | 1948-11-20 | Bolt anchorage |
Publications (1)
Publication Number | Publication Date |
---|---|
US2524480A true US2524480A (en) | 1950-10-03 |
Family
ID=22034587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US61249A Expired - Lifetime US2524480A (en) | 1948-11-20 | 1948-11-20 | Bolt anchorage |
Country Status (1)
Country | Link |
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US (1) | US2524480A (en) |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3945070A (en) * | 1975-05-19 | 1976-03-23 | Avia Instrument Company | Wire thread cast insert |
US4377280A (en) * | 1978-12-29 | 1983-03-22 | Stahlwerke Bruninghaus Gesellschaft Mit Beschrankter Haftung | Cylindrical helical compression spring |
US5222957A (en) * | 1990-04-17 | 1993-06-29 | Zimmer, Inc. | Method and apparatus for extracting a cement mantle from a bone recess |
WO2004051097A1 (en) * | 2002-11-29 | 2004-06-17 | John Unsworth | Self adjusting, high strength, screw system |
US20100234904A1 (en) * | 2009-03-10 | 2010-09-16 | Marc Evan Richelsoph | Active Bone Screw |
US7935138B1 (en) | 2010-07-28 | 2011-05-03 | Richelsoph Marc E | Active bone screw |
US20120225408A1 (en) * | 2009-11-02 | 2012-09-06 | Simon Garry Moore | Flexible spring fastener |
DE102013219013A1 (en) * | 2013-09-20 | 2015-03-26 | Böllhoff Verbindungstechnik GmbH | Spring connecting element |
US10335215B2 (en) * | 2013-10-11 | 2019-07-02 | Biedermann Technologies Gmbh & Co. Kg | Bone screw with self-constrained flexibility |
US20220389950A1 (en) * | 2019-10-31 | 2022-12-08 | Hilti Aktiengesellschaft | Screw with axially compressible thread |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US163485A (en) * | 1875-05-18 | Improvement in car-springs | ||
US240780A (en) * | 1881-04-26 | smith | ||
US271929A (en) * | 1883-02-06 | Haeyey f | ||
US1230603A (en) * | 1914-07-21 | 1917-06-19 | Julian Richmond | Screw-anchor. |
US1311646A (en) * | 1919-07-29 | Fastening purposes | ||
US2439685A (en) * | 1943-09-30 | 1948-04-13 | Eaton Mfg Co | Thread insert |
-
1948
- 1948-11-20 US US61249A patent/US2524480A/en not_active Expired - Lifetime
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US163485A (en) * | 1875-05-18 | Improvement in car-springs | ||
US240780A (en) * | 1881-04-26 | smith | ||
US271929A (en) * | 1883-02-06 | Haeyey f | ||
US1311646A (en) * | 1919-07-29 | Fastening purposes | ||
US1230603A (en) * | 1914-07-21 | 1917-06-19 | Julian Richmond | Screw-anchor. |
US2439685A (en) * | 1943-09-30 | 1948-04-13 | Eaton Mfg Co | Thread insert |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3945070A (en) * | 1975-05-19 | 1976-03-23 | Avia Instrument Company | Wire thread cast insert |
US4377280A (en) * | 1978-12-29 | 1983-03-22 | Stahlwerke Bruninghaus Gesellschaft Mit Beschrankter Haftung | Cylindrical helical compression spring |
US5222957A (en) * | 1990-04-17 | 1993-06-29 | Zimmer, Inc. | Method and apparatus for extracting a cement mantle from a bone recess |
US6860691B2 (en) | 2001-06-18 | 2005-03-01 | John Duncan Unsworth | Self adjusting, high strength, screw system |
WO2004051097A1 (en) * | 2002-11-29 | 2004-06-17 | John Unsworth | Self adjusting, high strength, screw system |
US8414630B2 (en) * | 2009-03-10 | 2013-04-09 | Marc Evan Richelsoph | Active bone screw |
US20100234904A1 (en) * | 2009-03-10 | 2010-09-16 | Marc Evan Richelsoph | Active Bone Screw |
US20120225408A1 (en) * | 2009-11-02 | 2012-09-06 | Simon Garry Moore | Flexible spring fastener |
US7935138B1 (en) | 2010-07-28 | 2011-05-03 | Richelsoph Marc E | Active bone screw |
DE102013219013A1 (en) * | 2013-09-20 | 2015-03-26 | Böllhoff Verbindungstechnik GmbH | Spring connecting element |
US9909603B2 (en) | 2013-09-20 | 2018-03-06 | Böllhoff Verbindungstechnik GmbH | Spring connection element |
US10626900B2 (en) | 2013-09-20 | 2020-04-21 | Böllhoff Verbindungstechnik GmbH | Spring connection element |
US10335215B2 (en) * | 2013-10-11 | 2019-07-02 | Biedermann Technologies Gmbh & Co. Kg | Bone screw with self-constrained flexibility |
US11172968B2 (en) | 2013-10-11 | 2021-11-16 | Biedermann Technologies Gmbh & Co. Kg | Bone screw with self-constrained flexibility |
US20220389950A1 (en) * | 2019-10-31 | 2022-12-08 | Hilti Aktiengesellschaft | Screw with axially compressible thread |
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