Chain – staple – and horseshoe making – Chains – Ornamental
Patent
1996-05-03
1997-06-10
Jones, David
Chain, staple, and horseshoe making
Chains
Ornamental
59 85, F16G 1316
Patent
active
056365063
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention relates to a chain link and a method for the production thereof and comprises chain links made of different materials such as steel and plastics. Chain links according to the present invention can be used in an unlimited number of applications.
Chains are commonly known. They consist of ring- or loop-shaped links usually of steel which have been threaded into each other and thereafter welded together so that they consist of a continuous unit which cannot easily be taken apart. The chain link can also consist of materials other than steel having the desired strength and corrosion resistance depending on the intended field of use.
Chains are used all over in a number of quite different areas. One such area is on boats, for example on fishing boats. There the chains are primarily used for fastening the trawl to a trawl board in the boat. Such a trawl is usually attached at two points on the boat by means of chains which branch out and which by means of straps and the like are connected to the trawl itself at a number of points. In this connection it is important that the different length of the chains can be adapted so that the trawl is connected properly.
When for instance on a fishing boat the length of the chain has to be adjusted to make the trawl function optimally, chain links have to be added or removed, which due to the movements of the boat is very laborious. It may also be necessary to replace chain links due to wear. The work is usually done on deck by means of a cutting torch or other types of cutting tools which opens the chain link so that replacement and adjustment can be carried out. During this work no fishing can be done and all work has to be done under stress which can result many cut and burn injuries.
SUMMARY OF THE INVENTION
There has therefore always been a strong desire to be able to adjust the length of a chain in a simpler way than that described above without the help of cutting or other tools. According to the invention a chain link has therefore been produced consisting of an endless elongated rod-like part which is characterized in that it has been formed as two pairs of loops, wherein the loops in every pair are substantially parallel, and in that the pairs are arranged in two planes which are turned through 90.degree. with respect to each other.
According to the invention the two pair of loops should have the same dimension.
It is further suitable according to the invention that the parallel loops are located at a certain distance from each other corresponding approximately to the thickness of the rod. They can, however, also lie tight against each other and be welded together.
According to the invention the chain link can be made for example of wrought steel or thermoplastics, preferably ultra-high molecular crystalline polyamide 6.
The invention also comprises a chain consisting of connected chain links according to the claims as well as possibly one or more connecting parts.
A connecting part for connecting the chain links is also comprised in the invention and is characterized in that it consists of a semifinished chain link and is made of an endless elongated rod having two parallel straight portions merging into a loop at each end.
The invention also comprises a method for the production of chain links according to the invention, the method being characterized in that an endless elongated rod having two parallel straight portions merging into a loop at each end is first moulded or extruded whereupon the two straight portions are bent into loops in a plane perpendicular to the plane of the moulded loops.
According to the invention it is suitable that the material in the rod consists of crystalline ultra-high molecular thermoplastics and that the bending is carried out during, at most, 5-10 seconds after the first shaping whilst the rod still is hot, for example 60.degree. C.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention will now be described in more detail with reference to the drawings, in which FIG. 1 shows a ch
REFERENCES:
patent: 6238 (1849-03-01), Walkington
patent: 1257398 (1918-02-01), Roach
patent: 1372693 (1921-03-01), Hodges
patent: 1439978 (1922-12-01), Renault
patent: 2714798 (1955-08-01), Linnenbank
patent: 2840983 (1958-07-01), Keilbach
patent: 3673794 (1972-07-01), I'Anson
patent: 4056928 (1977-11-01), de Vries
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