CA2199589A1 - Improvements in or relating to connecting members - Google Patents
Improvements in or relating to connecting membersInfo
- Publication number
- CA2199589A1 CA2199589A1 CA 2199589 CA2199589A CA2199589A1 CA 2199589 A1 CA2199589 A1 CA 2199589A1 CA 2199589 CA2199589 CA 2199589 CA 2199589 A CA2199589 A CA 2199589A CA 2199589 A1 CA2199589 A1 CA 2199589A1
- Authority
- CA
- Canada
- Prior art keywords
- connecting member
- head
- cap
- shank
- pan
- 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
- 239000000463 material Substances 0.000 claims abstract description 21
- 239000004411 aluminium Substances 0.000 claims description 14
- 229910052782 aluminium Inorganic materials 0.000 claims description 14
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 14
- 238000010411 cooking Methods 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 238000005452 bending Methods 0.000 claims description 2
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 150000002739 metals Chemical class 0.000 claims 1
- 238000000576 coating method Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000004809 Teflon Substances 0.000 description 2
- 229920006362 Teflon® Polymers 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910001369 Brass Inorganic materials 0.000 description 1
- 241001296096 Probles Species 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000007787 solid 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Cookers (AREA)
Abstract
A connecting member comprises a shank (110), a head (130) of larger diameter than the shank, and a cap (120) attached to the head, wherein the shank (110) and head (130) are formed of a first material and the cap (120) is formed of a second material different from the first material.
Description
IMPROVEMENTS IN OR RELATING TO CONNECTING MEMHERS
Backqround of the Invention This invention relates to a connecting member. More particularly, but not exclusively, this invention relates to a connecting member having improved durability.
Many known connecting members such as bolts, screws, nails and rivets which comprise a shank and a head are formed of a single material such as iron, steel or aluminium.
lo However, the inventors have found in practice that the shank and the head often perform different functions, are subject to different forces and are exposed to different conditions, and therefore, the formation of these connecting members from a single substance is not always appropriate.
It is therefore an object of the present invention to overcome the above difficulties or disadvantages or at least to provide the public with a useful choice.
Summary of the Invention Accordingly, in a first embodiment the present invention there is provided a connecting member comprising a shank;
a head of larger diameter than the shank; and a cap attached to the head, wherein the shank and head are formed of a first material and the cap is formed of a second material different from the first material.
In a further em~odiment the present invention consists in a method of forming a connecting member comprising the steps of;-(a) providing a shank with a head having a diameter larger than the diameter of the shank;
(b) attaching a cap to the head by bending a flange or flanges on the cap underneath the head.
In yet another embodiment the invention comprises a cooking implement having a handle portion connected to a pan lS portion by one or more connecting members wherein the connecting member or members comprise a shank, a head of larger diameter than the shank, and a cap attached to the head, wherein the shank and head are formed of a first material and the cap is formed of a second material different from the first material.
A particular application of the present invention is for aluminium rivets, where used in the manufacture of saucepans. The function of the shank of the rivet is to join one part of the saucepan to another. The function of the head is to protect the shaft and to keep the rivet in place. The shaft is exposed eo the inside surface of the rivet receiving recess into which it has been forced and the outside of the saucepan, whereas the head is exposed either to the cooking and cleaning processes, or to a protective layer on the saucepan, such as a teflon coating.
Known aluminium rivets are formed of aluminium because it is a particularly suitable material for forming the shaft.
This is because aluminium is relatively malleable and therefore a rivet shaft of slightly larger diameter than its corresponding rivet receiving recess can be more easily forced into and held within the rivet receiving recess, than less malleable materials such a3 stainless steel. As the 3haft can be forced into a slightly smaller recess, this creates a liquid tight seal between the shaft and the recess.
However, having the head formed of aluminium is not so appropriate. The very malleability oF the aluminium which makes it so appropriate for use as the shaft, results in the head being very prone to wear, to the extent that after extended exposure to environmental and physical forces, particularly scrub~ing, the head can come away from the sha~t completely. This is obviously undesirable as it will expose the shaft to the same rorces and also will increase the likelihood that the ~haft will come out of the rivet receiving recess.
A further undesirable feature of having the head formed of aluminium is that ~ood in particular tends to stick to and/or burn onto aluminium. Thus, in a saucepan provided with a non-stick coating such as a teflon coating, the aluminium rivet heads also need to be coated within the non-stick coating. A problem with this is that non-~tick coatings tend not to adhere well to aluminium and therefore the patch of coating covering the rivet head may be easily rubbed or scratched off. This not only expo~es the rivet head and creates a part of the saucepan to which food may stick or burn, but it generally results in lifting of the coating around the rivet and eventually over large sections of the saucepan.
It is clear then that there is significant advantage in forming a shaft of a connecting member of a different material from the head or at least the surface of the head which is exposed in use, depending on the different conditions to which each are exposed. In particular, it is appropriate in many applications to form the shaft of a substance more malleable than the substance from which the head is formed.
A proble~ with forming the head and the shank of connecting members of different substances is the combining of the two substances in a durable, secure and efficient manner.
Brief DescriPtion of the Drawinqs One mea~s of producing a connecting means of the invention will now be described with reference to the accompanying drawings in which:-Figure 1 is a side view of a preferred embodiment of a cap for a connecting member of the invention;
Figure 2 i~ a cross section of a connecting member of the invention with a cap placed over a head of the connecting member.
Figure 3 is a cross section of the connecting member of Figure 2 showing the cap secured to the head.
Detailed Description o~ the Preferred Embodiment The drawings show a connecting member 100 having a shank 110 with a head 130 of any suitable conventional design, such as a conventional rivet, nail, screw or bolt might be arranged. To protect the head 130 of the shank, the top 150 of the connecting mem~er 100 is provided with a cap 120 to cover at least the surfaces exposed in use of the head 130.
-The cap has a downwardly depending annular flange 140 which, when the cap is fitted over the head 130, may be bent under the head 130 to secure the cap 120 in place on the head 130.
Instead of an annular flange, the cap 120 may have at least one, preferably a plurality, of downwardly depending lugs.
The drawings show just one suitable method of forming a connecting member of the invention. Other methods include affixing a hollow or solid cap to the head 130 by adhering or by pins. Alternatively, the cap 120, may be attached directly to the shaft 110, by adhering or pins or in any other conventional manner.
The shank and head are suitably formed o~ aluminium and the cap of stainless steel. When used in a saucepan application, the malleability of the aluminium provides a good ~it for the rivet in the rivet receiving recess and the stainless steel cap provides a longer wearing, stronger and non-stick surface which is also aesthetically pleasing.
While it is apparent that the invention described above is well calculated to fulfil the object, it will ~e appreciated that numerous modifications and embodiments may be devised by those skilled in the art, and it is intended that the appended claims cover all such modifications and embodiments that fall within the true spirit and scope of the present invention. For example, the connecting mem~er may be a nail, screw or bolt and the shaft and cap may be made of any suitable, different substances depending on the use to which the connecting member will be put, such as steel shaft and brass cap, iron shaft and steel cap, steel shaft and plastic cap etc.
Backqround of the Invention This invention relates to a connecting member. More particularly, but not exclusively, this invention relates to a connecting member having improved durability.
Many known connecting members such as bolts, screws, nails and rivets which comprise a shank and a head are formed of a single material such as iron, steel or aluminium.
lo However, the inventors have found in practice that the shank and the head often perform different functions, are subject to different forces and are exposed to different conditions, and therefore, the formation of these connecting members from a single substance is not always appropriate.
It is therefore an object of the present invention to overcome the above difficulties or disadvantages or at least to provide the public with a useful choice.
Summary of the Invention Accordingly, in a first embodiment the present invention there is provided a connecting member comprising a shank;
a head of larger diameter than the shank; and a cap attached to the head, wherein the shank and head are formed of a first material and the cap is formed of a second material different from the first material.
In a further em~odiment the present invention consists in a method of forming a connecting member comprising the steps of;-(a) providing a shank with a head having a diameter larger than the diameter of the shank;
(b) attaching a cap to the head by bending a flange or flanges on the cap underneath the head.
In yet another embodiment the invention comprises a cooking implement having a handle portion connected to a pan lS portion by one or more connecting members wherein the connecting member or members comprise a shank, a head of larger diameter than the shank, and a cap attached to the head, wherein the shank and head are formed of a first material and the cap is formed of a second material different from the first material.
A particular application of the present invention is for aluminium rivets, where used in the manufacture of saucepans. The function of the shank of the rivet is to join one part of the saucepan to another. The function of the head is to protect the shaft and to keep the rivet in place. The shaft is exposed eo the inside surface of the rivet receiving recess into which it has been forced and the outside of the saucepan, whereas the head is exposed either to the cooking and cleaning processes, or to a protective layer on the saucepan, such as a teflon coating.
Known aluminium rivets are formed of aluminium because it is a particularly suitable material for forming the shaft.
This is because aluminium is relatively malleable and therefore a rivet shaft of slightly larger diameter than its corresponding rivet receiving recess can be more easily forced into and held within the rivet receiving recess, than less malleable materials such a3 stainless steel. As the 3haft can be forced into a slightly smaller recess, this creates a liquid tight seal between the shaft and the recess.
However, having the head formed of aluminium is not so appropriate. The very malleability oF the aluminium which makes it so appropriate for use as the shaft, results in the head being very prone to wear, to the extent that after extended exposure to environmental and physical forces, particularly scrub~ing, the head can come away from the sha~t completely. This is obviously undesirable as it will expose the shaft to the same rorces and also will increase the likelihood that the ~haft will come out of the rivet receiving recess.
A further undesirable feature of having the head formed of aluminium is that ~ood in particular tends to stick to and/or burn onto aluminium. Thus, in a saucepan provided with a non-stick coating such as a teflon coating, the aluminium rivet heads also need to be coated within the non-stick coating. A problem with this is that non-~tick coatings tend not to adhere well to aluminium and therefore the patch of coating covering the rivet head may be easily rubbed or scratched off. This not only expo~es the rivet head and creates a part of the saucepan to which food may stick or burn, but it generally results in lifting of the coating around the rivet and eventually over large sections of the saucepan.
It is clear then that there is significant advantage in forming a shaft of a connecting member of a different material from the head or at least the surface of the head which is exposed in use, depending on the different conditions to which each are exposed. In particular, it is appropriate in many applications to form the shaft of a substance more malleable than the substance from which the head is formed.
A proble~ with forming the head and the shank of connecting members of different substances is the combining of the two substances in a durable, secure and efficient manner.
Brief DescriPtion of the Drawinqs One mea~s of producing a connecting means of the invention will now be described with reference to the accompanying drawings in which:-Figure 1 is a side view of a preferred embodiment of a cap for a connecting member of the invention;
Figure 2 i~ a cross section of a connecting member of the invention with a cap placed over a head of the connecting member.
Figure 3 is a cross section of the connecting member of Figure 2 showing the cap secured to the head.
Detailed Description o~ the Preferred Embodiment The drawings show a connecting member 100 having a shank 110 with a head 130 of any suitable conventional design, such as a conventional rivet, nail, screw or bolt might be arranged. To protect the head 130 of the shank, the top 150 of the connecting mem~er 100 is provided with a cap 120 to cover at least the surfaces exposed in use of the head 130.
-The cap has a downwardly depending annular flange 140 which, when the cap is fitted over the head 130, may be bent under the head 130 to secure the cap 120 in place on the head 130.
Instead of an annular flange, the cap 120 may have at least one, preferably a plurality, of downwardly depending lugs.
The drawings show just one suitable method of forming a connecting member of the invention. Other methods include affixing a hollow or solid cap to the head 130 by adhering or by pins. Alternatively, the cap 120, may be attached directly to the shaft 110, by adhering or pins or in any other conventional manner.
The shank and head are suitably formed o~ aluminium and the cap of stainless steel. When used in a saucepan application, the malleability of the aluminium provides a good ~it for the rivet in the rivet receiving recess and the stainless steel cap provides a longer wearing, stronger and non-stick surface which is also aesthetically pleasing.
While it is apparent that the invention described above is well calculated to fulfil the object, it will ~e appreciated that numerous modifications and embodiments may be devised by those skilled in the art, and it is intended that the appended claims cover all such modifications and embodiments that fall within the true spirit and scope of the present invention. For example, the connecting mem~er may be a nail, screw or bolt and the shaft and cap may be made of any suitable, different substances depending on the use to which the connecting member will be put, such as steel shaft and brass cap, iron shaft and steel cap, steel shaft and plastic cap etc.
Claims (21)
1. A connecting member comprising a shank, a head of larger diameter than the shank, and a cap attached to the head, wherein the shank and head are formed of a first material and the cap is formed of a second material different from the first material.
2. A connecting member as claimed in claim 1, wherein the cap is provided with at least one flange which is bent under the head to secure the cap to the shank.
3. A connecting member as claimed in claim 2, wherein the at least one flange is an annular flange.
4. A connecting member as claimed in claim 2, wherein the at least one flange is downwardly depending.
5. A connecting member as claimed in claim 1, wherein the first material is more malleable than the second material.
6. A connecting member as claimed in claim 1, wherein the first and second materials are metals.
7. A connecting member as claimed in claim 1, wherein the first material is aluminium.
8. A connecting member as claimed in claim 1, wherein the second material is steel.
9. A connecting member as claimed in claim 8, wherein the steel is stainless steel.
10. A connecting member as claimed in claim 1, wherein the connecting member is a rivet.
11 A connecting member as claimed in claim 10, wherein the cap has a diameter of no less than 4 mm.
12. A connecting member as claimed in claim 1, wherein the connecting member is a bolt.
13. A connecting member as claimed in claim 1, wherein the connecting member is a nail.
14. A connecting member as claimed in claim 1, wherein the connecting member is a screw.
15. A cooking implement having a handle portion connected to a pan portion by one or more connecting members as claimed in claim 1.
16. A cooking implement as claimed in claim 15, wherein the connecting members are rivets.
17. A cooking implement as claimed in claim 15, wherein the pan is a saucepan.
18. A cooking implement as claimed in claim 15, wherein the pan is a fry pan.
19. A cooking implement as claimed in claim 15, wherein the pan is a cooking pan.
20. A method of forming a connecting member comprising the steps of:-(a) providing a shank with a head having a diameter larger than the diameter of the shank;
(b) attaching a cap to the head by bending a flange or flanges on the cap underneath the head.
(b) attaching a cap to the head by bending a flange or flanges on the cap underneath the head.
21. A method as claimed in claim 31, wherein the connecting member is a connecting member as claimed in claim 1.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9605128.9 | 1996-03-11 | ||
| GB9605128A GB2311113A (en) | 1996-03-11 | 1996-03-11 | Caps on fastener heads |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2199589A1 true CA2199589A1 (en) | 1997-09-11 |
Family
ID=10790203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2199589 Abandoned CA2199589A1 (en) | 1996-03-11 | 1997-03-10 | Improvements in or relating to connecting members |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2199589A1 (en) |
| GB (1) | GB2311113A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SI20885A (en) * | 2001-03-30 | 2002-10-31 | Anton �kodnik | Screw with gasket |
| US6779958B2 (en) * | 2002-02-01 | 2004-08-24 | Hilti Aktiengesellschaft | Attachment element |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB632038A (en) * | 1946-07-18 | 1949-11-15 | Norman Curtis Rublee | Improvements in insulated nails |
| GB1029412A (en) * | 1964-01-24 | 1966-05-11 | Gen Electric Co Ltd | Improvements in or relating to obscuring covers for the heads of securing members |
| FR1596429A (en) * | 1968-06-24 | 1970-06-15 | ||
| ZA725712B (en) * | 1971-09-01 | 1974-10-30 | Illinois Tool Works | Screw fasteners |
| US4460300A (en) * | 1982-01-11 | 1984-07-17 | Illinois Tool Works Inc. | Fastener with head cap having a concealed edge |
| US4749321A (en) * | 1987-04-24 | 1988-06-07 | Elco Industries, Inc. | Sealing fastener |
| US4759672A (en) * | 1987-05-08 | 1988-07-26 | Illinois Tool Works Inc. | Fastener head with stabilizing ring |
| US4948318A (en) * | 1989-04-03 | 1990-08-14 | Textron, Inc. | Non-corrosive headed composite fasteners and a method of producing the same |
-
1996
- 1996-03-11 GB GB9605128A patent/GB2311113A/en not_active Withdrawn
-
1997
- 1997-03-10 CA CA 2199589 patent/CA2199589A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| GB9605128D0 (en) | 1996-05-08 |
| GB2311113A (en) | 1997-09-17 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Dead |