GB1593502A - Threaded fasteners - Google Patents
Threaded fasteners Download PDFInfo
- Publication number
- GB1593502A GB1593502A GB3483177A GB3483177A GB1593502A GB 1593502 A GB1593502 A GB 1593502A GB 3483177 A GB3483177 A GB 3483177A GB 3483177 A GB3483177 A GB 3483177A GB 1593502 A GB1593502 A GB 1593502A
- Authority
- GB
- United Kingdom
- Prior art keywords
- screw thread
- threaded
- workpiece
- bore
- stud
- 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
- 238000000034 method Methods 0.000 claims description 17
- 238000012986 modification Methods 0.000 claims description 2
- 230000004048 modification Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000011089 mechanical engineering Methods 0.000 description 1
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
- F16B39/00—Locking of screws, bolts or nuts
- F16B39/22—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening
- F16B39/28—Locking of screws, bolts or nuts in which the locking takes place during screwing down or tightening by special members on, or shape of, the nut or bolt
-
- 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
- F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
- F16B19/02—Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings
-
- 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
- F16B33/00—Features common to bolt and nut
- F16B33/002—Means for preventing rotation of screw-threaded elements
-
- 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
- F16B35/00—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws
- F16B35/04—Screw-bolts; Stay-bolts; Screw-threaded studs; Screws; Set screws with specially-shaped head or shaft in order to fix the bolt on or in an object
- F16B35/041—Specially-shaped shafts
-
- 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
- F16B37/122—Threaded inserts, e.g. "rampa bolts"
- F16B37/125—Threaded inserts, e.g. "rampa bolts" the external surface of the insert being threaded
-
- 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
- F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
- F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Dowels (AREA)
Description
(54) IMPROVEMENTS IN AND RELATING TO
THREADED FASTENERS
(71) I, EDWARD PRICE, a British subject of 94 Brampton Grove, Kenton,
Harrow, Middlesex, HA3 8LF, do hereby declare the invention, for which I pray that a patent may be granted to me, and the method by which it is to be performed, to be particularly described in and by the following statement:- The present invention relates to threaded fasteners and provides threaded inserts and studs of new and improved design.
The threaded fasteners to which the invention relates are those in which a body has an external first screw thread for screwing into an internally threaded bore in a workpiece and a second'screw thread for screw-threadably receiving a threaded member to secure said member to said workpiece. Such fasteners are referred to hereinafter as "threaded fasteners of the kind referred to". Usually, the cooperating threaded member will serve to clamp a second workpiece to the first workpiece (i.e. that workpiece having the threaded bore). When the second screw thread is an external screw thread, the threaded fastener of the kind referred to is known as a "stud" or "bolt stud" and when the second screw thread is an internal screw thread, the threaded fastener of the kind referred to is known as an "insert".
Threaded fasteners of the kind referred to have been known for many years and are widely used in mechanical engineering. For example, bolt studs are extensively used for securing cover plates to machines and cylinder heads to cars. To the best of my knowledge, all known threaded fasteners of the kind referred to have concentric screw threads and therefore torque applied to, tighten or loosen the cooperating threaded member received in or on the second screw thread can rotate the threaded fastener in the threaded bore of the first workpiece.
This situation has militated against the use of such threaded fasteners and has led to the development of alternative fasteners which are generally more expensive to manufacture. It is an object of this invention to improve threaded fasteners of the kind referred to so that the torque applied to the cooperating member cannot directly be applied to the fastener itself to rotate it in the threaded bore of the first workpiece. I have found that this object can be achieved in simple and relatively inexpensive manner by avoiding the concentricity of the first and second screw threads.
According to the present invention therefore, there is provided a threaded fastener of the kind referred to in which the first and second screw threads thereof are mutually eccentrically disposed. The fastener can be a stud or an insert and except for the eccentricity of the screw threads can be of any shape' or configuration conventionally adopted for threaded studs or inserts. The screw threads can be, for example, Metric or Unified form threads and can extend over the whole or only part of the fastener body.
It will be appreciated that if the first workpiece is non-rotatable, the fastener of the invention will not rotate when the cooperating member is being tightened or loosened into or onto the second screw thread.
When the fastener of the invention is a stud, the cooperating member will usually be a nut but can be any other cooperatingly internally threaded member. When the fastener of the invention is an insert, the cooperating member usually will be a bolt but can be any other cooperatingly externally threaded member.
The fasteners of the invention are used in conventional manner for threaded fasteners of the kind referred to and have particular application to bolting a second workpiece to the first workpiece.
According to a first method aspect of the present invention, there is provided a inethod of bolting two workpieces together with a fastener of the invention in the form of a stud, which method comprises forming a threaded bore in a first workpiece to threadably receive the first screw thread of the stud; forming a plain bore through the second workpiece to slidably receive the second screw thread of the stud; screwing the first screw thread of the stud into said threaded bore to attach the stud to the first workpiece; passing the second screw thread of the stud through the said plain bore; and screwing a nut onto the second screw thread to clamp the two workpieces together.
According to a second method aspect of the present invention, there is provided a method of bolting two workpieces together with a fastener of the invention in the form of an insert, which method comprises forming a threaded bore in a first workpiece to threadably receive the first screw thread of the insert; forming a plain bore in the second workpiece to slidably receive a threaded bolt which will threadably engage in the second screw thread of the insert; -screwing the first screw thread of the insert into said threaded bore to attach the insert to the first workpiece; passing the threaded bolt through said plain bore; and screwing the bolt into the second screw thread of the insert to clamp the workpieces together.
In preferred embodiments of said methods of the invention, there are provided two said sets of threaded and plain bores at spaced locations in the workpieces with the eccentricity of the bores in each set opposed and respective studs and nuts or inserts and bolts clamp the workpieces together at each set. The mutual oppositon of eccentricity prevents mutual rotation of the workpieces if not otherwise nonrotatably secured.
The following is a description by way of example only and with reference to the accompanying drawings, of preferred embodiments of the present invention. In the drawings: Figure 1 is a side view of a stud in accordance with a preferred embodiment of the present invention;
Figure 2 is an end view of the stud of
Figure 1;
Figure 3 is a cross-sectional view of an insert in accordance with a preferred embodiment of the present invention;
Figure 4 is an end view of the insert of
Figure 3;
Figure 5 is a cross-sectional view of the stud of Figures 1 and 2 securing two workpeices together; and
Figure 6 is a cross-sectional view of the insert of Figures 3 and 4 securing two workpieces together.
Referring first to Figures 1 and 2, a stud, generally indicated at 1, has a body with an external first screw thread 2 and an external second screw thread 3. The first screwthread 2 is formed about a lower cylindrical portion 4 of the body whilst the second screw-thread 3 is formed about an upper cylindrical portion 5 of said body. The axis of body portion 5 is eccentrically offset from the axis of body portion 4 and hence the screw threads 3, 2 are correspondingly offset.
Referring now to Figure 5,-a blind bore 51 is drilled and tapped in a first workpiece 52 to threadably receive the first screw thread 2 of the stud 1. A plain bore 53 is drilled through a second workpiece 54 to slidably receive the second screw thread 3.
The first screw thread is screwed into the tapped hole 51 and the workpieces 52, 54 mutually positioned so that the screw thread 3 extends through and protrudes from the plain bore 53. A nut 55 is then screwed onto the screw thread 3 and tightened to clamp the workpieces 52, 54 together. If necessary the workpiece 52 is restrained against movement during tightening of the nut 55 to prevent rotation of that workpiece.
It is preferred that when the workpieces are clamped together by two or more studs 1 at spaced locations, at least two sets of bores 51, 53 to receive the studs have opposed eccentricity as can be seen in
Figure 5 in the case of the holes 51, 53 and 511, 531 receiving adjacent studs 1, 1'. This arrangement prevents rotation of workpiece 52 when the studs 1, 11 extend from the workpiece through the respective bores 53, 531
Referring to Figures 3 and 4, an insert generally indicated at 31, has a body with an external first screw thread 32 and an internal second screw thread 33. The first screw thread 32 is formed about a main cylindrical portion 34 of the body whilst the second screw thread 33 is a drilled and tapped bore 35 which extends through the body portion 34 and a minor cylindrical portion 36 of the body. The bore 35 and body portion 36 are eccentrically offset from the main body portion 34 but the said bore 35 and body portion 36 are mutually concentric. The distal end of portion 36 is slightly deformed into an oval shape to form a locking element in manner known per se.
Use of the insert 31 is illustrated in Figure 6. A blind bore 61 is drilled and tapped in a first workpiece 62 to threadably receive the first screw thread 32 of the insert 31. A plain bore 63 is drilled through a second workpiece 64 to slidably receive the threaded shank of a bolt 65 to be threadably received in the second screw thread 33. The insert 31 is screwed into the tapped bore 61 and the workpieces mutually positioned so that the shank of bolt 65 can be passed through the bore 63 and screwed into the second screw thread of the inset to clamp the workpieces 62, 64 together. If necessary, the workpiece 62 is restrained against movement during tightening of the bolt 65 to prevent rotation of the workpiece.
As in the case of the use of studs 1, it is preferred that there are two sets of bores 61, 63 at spaced locations which sets are of opposed eccentricity as can be seen in
Figure 6 in the case of holes 61, 63 and 611, 63' receiving inserts 31, 311.
It will be appreciated that the invention is not restricted to the details particularly described above with reference to the drawings but that numerous modifications and variations can be made without departing from the scope of the invention as defined in the following Claims.
WHAT I CLAIM IS:- 1. A threaded fastener of the kind referred to wherein the first and second screw threads thereof are mutually eccentrically disposed.
2. A threaded fastener as claimed in
Claim 1 and in the form of a stud wherein the second screw-thread is an external screw thread.
3. A threaded fastener as claimed in
Claim 1 and in the form of an insert wherein the second screw thread is an internal screw thread.
4. A threaded stud substantially as hereinbefore described with reference to and as shown in Figures 1 and 2 of the accompanying drawings.
5. A threaded insert substantially as hereinbefore described with reference to and as shown in Figures 3 and 4 of the accompanying drawings.
6. A method of bolting two workpieces together which comprises forming a threaded bore in a first workpiece to threadably receive the first screw thread of a stud as claimed in Claim 2; forming a plain bore through the second workpiece to slidably receive the second screw thread of said stud; screwing the first screw thread of the stud into said threaded bore to attach the stud to the first workpiece; passing the second screw thread of the stud through said plain bore; and screwing a nut onto the second screw thread to clamp the two workpieces together.
7. A method of bolting two workpieces together which comprises forming a threaded bore in a first workpiece to threadably receive the first screw thread of an insert as claimed in Claim 3; forming a plain bore through the second workpiece to slidably receive a threaded bolt which will threadably engage in the second screw thread of the insert; screwing the first screw thread of the insert into said threaded bore to attach the insert to the first workpiece; passing the threaded bolt through said plain bore; and screwing the bolt into the second screw thread of the insert to clamp the two workpieces together.
8. A method as claimed in Claim 6 or
Claim 7 wherein there are two sets of threaded and plain holes at spaced locations in the workpieces with the eccentricity of the bores in each set opposed and respective studs and nuts or inserts and bolts clamp the workpieces together at each set.
9. A method as claimed in Claim 6 and substantially as hereinbefore described with reference to Figure 5 of the accompanying drawings.
10. A method as claimed in Claim 7 and substantially as hereinbefore described with reference to Figure 6 of the accompanying drawings.
**WARNING** end of DESC field may overlap start of CLMS **.
Claims (10)
1. A threaded fastener of the kind referred to wherein the first and second screw threads thereof are mutually eccentrically disposed.
2. A threaded fastener as claimed in
Claim 1 and in the form of a stud wherein the second screw-thread is an external screw thread.
3. A threaded fastener as claimed in
Claim 1 and in the form of an insert wherein the second screw thread is an internal screw thread.
4. A threaded stud substantially as hereinbefore described with reference to and as shown in Figures 1 and 2 of the accompanying drawings.
5. A threaded insert substantially as hereinbefore described with reference to and as shown in Figures 3 and 4 of the accompanying drawings.
6. A method of bolting two workpieces together which comprises forming a threaded bore in a first workpiece to threadably receive the first screw thread of a stud as claimed in Claim 2; forming a plain bore through the second workpiece to slidably receive the second screw thread of said stud; screwing the first screw thread of the stud into said threaded bore to attach the stud to the first workpiece; passing the second screw thread of the stud through said plain bore; and screwing a nut onto the second screw thread to clamp the two workpieces together.
7. A method of bolting two workpieces together which comprises forming a threaded bore in a first workpiece to threadably receive the first screw thread of an insert as claimed in Claim 3; forming a plain bore through the second workpiece to slidably receive a threaded bolt which will threadably engage in the second screw thread of the insert; screwing the first screw thread of the insert into said threaded bore to attach the insert to the first workpiece; passing the threaded bolt through said plain bore; and screwing the bolt into the second screw thread of the insert to clamp the two workpieces together.
8. A method as claimed in Claim 6 or
Claim 7 wherein there are two sets of threaded and plain holes at spaced locations in the workpieces with the eccentricity of the bores in each set opposed and respective studs and nuts or inserts and bolts clamp the workpieces together at each set.
9. A method as claimed in Claim 6 and substantially as hereinbefore described with reference to Figure 5 of the accompanying drawings.
10. A method as claimed in Claim 7 and substantially as hereinbefore described with reference to Figure 6 of the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3483177A GB1593502A (en) | 1978-05-30 | 1978-05-30 | Threaded fasteners |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3483177A GB1593502A (en) | 1978-05-30 | 1978-05-30 | Threaded fasteners |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1593502A true GB1593502A (en) | 1981-07-15 |
Family
ID=10370442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3483177A Expired GB1593502A (en) | 1978-05-30 | 1978-05-30 | Threaded fasteners |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1593502A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3119192A1 (en) * | 1981-05-14 | 1982-12-09 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Centring bolt for flanged joints |
| FR2554524A1 (en) * | 1983-11-03 | 1985-05-10 | Spiro Research Bv | CARRIER ELEMENT FOR SUSPENDING AN OBJECT TO A WALL OR A PARTITION |
| FR2606842A1 (en) * | 1986-11-17 | 1988-05-20 | Fermod | Device for fixing a component to a support |
| GB2297595A (en) * | 1994-09-16 | 1996-08-07 | David Harrison Conway | Fixing means |
| GB2460436A (en) * | 2008-05-29 | 2009-12-02 | Optima Contracting Ltd | Fittings for panels |
| EP2960530A1 (en) * | 2014-06-27 | 2015-12-30 | Siemens Aktiengesellschaft | Assembly method for an electric machine comprising at least two machine segments |
| IT202100014204A1 (en) * | 2021-05-31 | 2022-12-01 | Permo S R L | JOINT DEVICE FOR FURNITURE PANELS |
| WO2023088627A1 (en) * | 2021-11-22 | 2023-05-25 | Heim & Haus Holding Gmbh | Fastening element and system |
-
1978
- 1978-05-30 GB GB3483177A patent/GB1593502A/en not_active Expired
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3119192A1 (en) * | 1981-05-14 | 1982-12-09 | Klöckner-Humboldt-Deutz AG, 5000 Köln | Centring bolt for flanged joints |
| FR2554524A1 (en) * | 1983-11-03 | 1985-05-10 | Spiro Research Bv | CARRIER ELEMENT FOR SUSPENDING AN OBJECT TO A WALL OR A PARTITION |
| FR2606842A1 (en) * | 1986-11-17 | 1988-05-20 | Fermod | Device for fixing a component to a support |
| GB2297595A (en) * | 1994-09-16 | 1996-08-07 | David Harrison Conway | Fixing means |
| GB2460436A (en) * | 2008-05-29 | 2009-12-02 | Optima Contracting Ltd | Fittings for panels |
| GB2460436B (en) * | 2008-05-29 | 2011-09-07 | Optima Contracting Ltd | Fittings for panels |
| EP2960530A1 (en) * | 2014-06-27 | 2015-12-30 | Siemens Aktiengesellschaft | Assembly method for an electric machine comprising at least two machine segments |
| IT202100014204A1 (en) * | 2021-05-31 | 2022-12-01 | Permo S R L | JOINT DEVICE FOR FURNITURE PANELS |
| WO2023088627A1 (en) * | 2021-11-22 | 2023-05-25 | Heim & Haus Holding Gmbh | Fastening element and system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |