WO2002064983A1 - Cap for bolts, nuts or screws which project from surrounding surfaces - Google Patents
Cap for bolts, nuts or screws which project from surrounding surfaces Download PDFInfo
- Publication number
- WO2002064983A1 WO2002064983A1 PCT/AU2002/000116 AU0200116W WO02064983A1 WO 2002064983 A1 WO2002064983 A1 WO 2002064983A1 AU 0200116 W AU0200116 W AU 0200116W WO 02064983 A1 WO02064983 A1 WO 02064983A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- cap
- recess
- nuts
- bolts
- screws
- Prior art date
Links
- 230000007797 corrosion Effects 0.000 claims abstract description 6
- 238000005260 corrosion Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims description 10
- 230000002708 enhancing effect Effects 0.000 claims 3
- 238000000034 method Methods 0.000 description 5
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 2
- 230000037237 body shape Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052725 zinc Inorganic materials 0.000 description 2
- 239000011701 zinc Substances 0.000 description 2
- 230000001627 detrimental effect Effects 0.000 description 1
- -1 ferrous metals Chemical class 0.000 description 1
- 239000011253 protective coating Substances 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
- F16B37/00—Nuts or like thread-engaging members
- F16B37/14—Cap nuts; Nut caps or bolt caps
-
- 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
- F16B4/00—Shrinkage connections, e.g. assembled with the parts at different temperature; Force fits; Non-releasable friction-grip fastenings
- F16B4/004—Press fits, force fits, interference fits, i.e. fits without heat or chemical treatment
Definitions
- This invention relates to improvements in the performance of bolts and screws with heads, and nuts, where the head or nut projects perpendicular from the surface the fastening device it belongs to penetrates, hereafter referred to as " the subjects ".
- the subjects are a very common and therefore cheap method of assembling and fastening objects and structures, but they have some shortcomings. They can be very detrimental to the appearance of the object or structure, they can be easily undone with common tools, and therefore provide no security, and they can be susceptible to corrosion, even if treated, e.g. zinc plated, through damage to the protective coating in the process of applying them.
- this invention provides a cap for " the subjects " comprising a body and a recess in the bottom surface to be press fitted after the device has been fastened.
- the cap may be made from any suitable material, such as metal or plastic.
- the body may be made to any shape or design to accomplish the desired appearance, such as a forged rivet head or a rosette.
- the body may be made to any shape that is very inaccessible to common tools like spanners, pliers, screwdrivers etc, such as a dome that fits flush to the surface the fastening device penetrates, and therefore can neither be easily gripped, rotated or levered of.
- caps For anti corrosive applications, all caps provide a certain amount simply by protecting " the subjects " from the elements, passive protection, but for additional protection the cap may be made from an anti corrosive material, such as zinc, which induces a galvanic process that not only protects " the subjects " but surrounding ferrous metals as well, active protection.
- an anti corrosive material such as zinc
- the shape and the material of the body may be chosen appropriately.
- the press fit can be achieved by different means, e.g. accurate dimensioning of the recess or oversizing the recess and provision of vertical and/or horizontal ribbing on the walls of the recess, that draws away when the cap is pressed on.
- FIG.1 shows one example of a cap according to this invention in technical drawing, top perspective.
- FIG.2 shows same example of a cap according to this invention in real view, bottom perspective.
- FIG.3 and FIG.3a show the application of two such a caps to a bolt and nut assembly of two pieces of flat material.
- FIG.4 and FIG.4a show another example of a cap according to this invention in real view perspective and side elevation.
- the cap according to this invention comprises a body 1 and a recess 2 in the bottom surface 3.
- the body 1 is dome shaped for good appearance and very good security properties, with common tools the cap can neither be easily gripped, rotated or levered of.
- the anti corrosive properties can vary from fair to very good, depending on the material of the body.
- the recess 2 in the bottom of the surface 3 is accurately dimensioned hexagonal, to be press fitted to a hexagonal bolt head, screw head or nut, and deep enough for the body to fit flush with the surface the fastening device penetrates.
- FIG.3 and FIG.3a show two such caps in operation.
- Two pieces of flat material 6 and 7 are assembled by a bolt with hexagonal head 4 and a hexagonal nut 5.
- the two caps comprising the body 1, and the recess 2, accurately dimensioned hexagonal, in the bottom surface 3, are in position to be press fitted, FIG.3, and after being press fitted, FIG.3a.
- FIG.4 and FIG.4a show a different cap according to this invention, a hexagonal forged rivet head, which has very good appearance, low security, and depending on the material used for the body, fair to very good anti corrosive properties.
- the cap according to this invention is not restricted to the body shapes, recess shape or press fitting method shown in these examples, but may be made to any body shape to accomplish the desired appearance and/or security properties, to a recess shape of any of" the subjects " to be press fitted by any method, and may be made from any suitable material to accomplish the desired anti corrosive properties.
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Connection Of Plates (AREA)
Abstract
A cap for bolts and screws with heads, and nuts, where the head or nut projects perpendicular from the surface the fastening device it belongs to penetrates, is disclosed. The cap comprises a body (1) and a recess (2) in the bottom surface (3), to be press fitted to the bolt head, screw head or nut. The cap can be used to enhance the appearance and/or security and/or corrosion resistance of the fastening device.
Description
Cap for bolts, nuts or screws which project from surrounding surfaces
CAP FOR BOLTS AND SCREWS WITH HEADS, AND NUTS, WHERE THE HEAD OR NUT PROJECTS PERPENDICULAR FROM THE SURFACE THE FASTENING DEVICE IT BELONGS TO PENETRATES
This invention relates to improvements in the performance of bolts and screws with heads, and nuts, where the head or nut projects perpendicular from the surface the fastening device it belongs to penetrates, hereafter referred to as " the subjects ".
" The subjects " are a very common and therefore cheap method of assembling and fastening objects and structures, but they have some shortcomings. They can be very detrimental to the appearance of the object or structure, they can be easily undone with common tools, and therefore provide no security, and they can be susceptible to corrosion, even if treated, e.g. zinc plated, through damage to the protective coating in the process of applying them.
These problems are overcome by this invention, which provides a cap for " the subjects " comprising a body and a recess in the bottom surface to be press fitted after the device has been fastened.
The cap may be made from any suitable material, such as metal or plastic.
The different problems, appearance, security, corrosion, may be attended to either separately or in any combination thereof.
For appearance related applications, the body may be made to any shape or design to accomplish the desired appearance, such as a forged rivet head or a rosette.
For security related applications, the body may be made to any shape that is very inaccessible to common tools like spanners, pliers, screwdrivers etc, such as a dome that fits flush to the surface the fastening device penetrates, and therefore can neither be easily gripped, rotated or levered of.
For anti corrosive applications, all caps provide a certain amount simply by protecting " the subjects " from the elements, passive protection, but for additional protection the cap may be made from an anti corrosive material, such as zinc, which induces a galvanic process that not only protects " the subjects " but surrounding ferrous metals as well, active protection.
For any combination thereof the shape and the material of the body may be chosen appropriately.
The press fit can be achieved by different means, e.g. accurate dimensioning of the recess or oversizing the recess and provision of vertical and/or horizontal ribbing on the walls of the recess, that draws away when the cap is pressed on.
To assist with understanding the invention, references will now be made to the accompanying drawings, which show two examples of the invention.
In the drawings:
FIG.1 shows one example of a cap according to this invention in technical drawing, top perspective.
FIG.2 shows same example of a cap according to this invention in real view, bottom perspective.
FIG.3 and FIG.3a show the application of two such a caps to a bolt and nut assembly of two pieces of flat material.
FIG.4 and FIG.4a show another example of a cap according to this invention in real view perspective and side elevation.
Referring to FIG.1 and FIG.2, it can be seen that the cap according to this invention comprises a body 1 and a recess 2 in the bottom surface 3. In this example the body 1 is dome shaped for good appearance and very good security properties, with common tools the cap can neither be easily gripped, rotated or levered of. The anti corrosive properties can vary from fair to very good, depending on the material of the body. The recess 2 in the bottom of the surface 3 is accurately dimensioned hexagonal, to be press fitted to a hexagonal bolt head, screw head or nut, and deep enough for the body to fit flush with the surface the fastening device penetrates.
FIG.3 and FIG.3a show two such caps in operation. Two pieces of flat material 6 and 7 are assembled by a bolt with hexagonal head 4 and a hexagonal nut 5. The two caps comprising the body 1, and the recess 2, accurately dimensioned hexagonal, in the bottom surface 3, are in position to be press fitted, FIG.3, and after being press fitted, FIG.3a.
FIG.4 and FIG.4a show a different cap according to this invention, a hexagonal forged rivet head, which has very good appearance, low security, and depending on the material used for the body, fair to very good anti corrosive properties.
By the use of such caps, the performance of" the subjects ", such as machine bolts and nuts, coachscrews, screwbolts, can be enhanced in matters of appearance, security and corrosion protection, either separately or in any combination thereof, where ever an object or a structure is assembled or fastened with " the subjects ", such as buildings, bridges, balustrades, window grills, gates, furniture.
It will be realised that the cap according to this invention is not restricted to the body shapes, recess shape or press fitting method shown in these examples, but may be made to any body shape to accomplish the desired appearance and/or security properties, to a recess shape of any of" the subjects " to be press fitted by any method, and may be made from any suitable material to accomplish the desired anti corrosive properties.
Claims
1. A cap for bolts and screws with heads, and nuts, where the head or nut projects perpendicular from the surface the fastening device it belongs to penetrates, comprising a body and a recess in the bottom surface to be press fitted after the device has been fastened
2. The cap of claim 1 where the shape of the body is appearance enhancing.
3. The cap of claim 1 where the shape of the body is security enhancing.
4. The cap of claim 1 where the shape of the body is appearance and security enhancing.
5. The cap of claims 1 to 4 where the material of the body is passive corrosion protection.
6. The cap of claims 1 to 4 where the material of the body is active corrosion protection.
7. The cap of claims 1 to 6 where the press fit is achieved by accurate dimensions of the recess.
8. The cap of claims 1 to 6 where the press fit is achieved by oversizing the recess and provision of vertical and/or horizontal ribbing on the walls of the recess that draws away when the cap is pressed on.
9. The cap of claims 1 to 6 where the press fit is achieved by any other means.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AUPR2999 | 2001-02-09 | ||
AUPR2999A AUPR299901A0 (en) | 2001-02-09 | 2001-02-09 | Cap for bolts and screws with heads, and nuts, where the head or nut projects perpendicular from the surface the fastening device it belongs to penetrates |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2002064983A1 true WO2002064983A1 (en) | 2002-08-22 |
Family
ID=3827022
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/AU2002/000116 WO2002064983A1 (en) | 2001-02-09 | 2002-02-06 | Cap for bolts, nuts or screws which project from surrounding surfaces |
Country Status (2)
Country | Link |
---|---|
AU (1) | AUPR299901A0 (en) |
WO (1) | WO2002064983A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018208204A1 (en) * | 2018-05-24 | 2019-11-28 | Ford Global Technologies, Llc | Protective cap and electrical connection unit of a vehicle component |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1536598A (en) * | 1977-11-08 | 1978-12-20 | Chrysler Uk | Covers for nuts |
AU5065579A (en) * | 1978-09-13 | 1980-03-20 | Puchy, D.P.W. | Fastener and cap |
DE3617339A1 (en) * | 1986-05-23 | 1987-11-26 | Schneider Ernst Ulrich | Screw, covering cap for the screw and punch for producing the screw |
DE4439567A1 (en) * | 1993-12-15 | 1995-06-22 | Radolid Thiel Gmbh | Anticorrosion protective cap for screw heads |
EP0851129A1 (en) * | 1996-12-24 | 1998-07-01 | Celo Distribucion, S.A. | Fastening device |
JP2000027835A (en) * | 1998-07-14 | 2000-01-25 | Ueki House Kk | Cover attached to connecting member for connecting frame member such as column, beam, sill or the like |
-
2001
- 2001-02-09 AU AUPR2999A patent/AUPR299901A0/en not_active Abandoned
-
2002
- 2002-02-06 WO PCT/AU2002/000116 patent/WO2002064983A1/en not_active Application Discontinuation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1536598A (en) * | 1977-11-08 | 1978-12-20 | Chrysler Uk | Covers for nuts |
AU5065579A (en) * | 1978-09-13 | 1980-03-20 | Puchy, D.P.W. | Fastener and cap |
DE3617339A1 (en) * | 1986-05-23 | 1987-11-26 | Schneider Ernst Ulrich | Screw, covering cap for the screw and punch for producing the screw |
DE4439567A1 (en) * | 1993-12-15 | 1995-06-22 | Radolid Thiel Gmbh | Anticorrosion protective cap for screw heads |
EP0851129A1 (en) * | 1996-12-24 | 1998-07-01 | Celo Distribucion, S.A. | Fastening device |
JP2000027835A (en) * | 1998-07-14 | 2000-01-25 | Ueki House Kk | Cover attached to connecting member for connecting frame member such as column, beam, sill or the like |
Non-Patent Citations (1)
Title |
---|
DATABASE WPI Derwent World Patents Index; Class A88, AN 1992-285888/35 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018208204A1 (en) * | 2018-05-24 | 2019-11-28 | Ford Global Technologies, Llc | Protective cap and electrical connection unit of a vehicle component |
Also Published As
Publication number | Publication date |
---|---|
AUPR299901A0 (en) | 2001-03-08 |
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