Mechanism for securing rails of railways on wooden sleepers

Details Mechanism for securing rails of railways on wooden sleepers Mechanism for securing rails of railways on wooden sleepers

1998-09-01

2000-10-31

Morano, S. Joseph

Railways: surface track

Fastenings

Transverse slide

238310, 238324, 238340, 238361, E01B 960

Patent

active

061389218

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

The present specification refers to a mechanism for fastening each rail of a railroad to sleepers supporting it, in the specific case that said sleepers are made of wood, as in railways still out-of-date owing to their limited traffic, in railway lines in developing countries, and, in general, where minimal maintenance costs are essential, without impairing very good performances in the type of traffic they render for example, in case of exclusive goods service.
The mechanism of the invention performs an elastic fastening of the rail to a sleeper, having a parallel wedging effect, and secures a very good fastening, in addition to a series of complementary advantages which will be enumarated along the present description.
Also, this invention contemplates aspects of this mechanism making easy its implantation and maintenance.
1. Field of the Invention
This invention will find application in the industry devoted to railways.
2. Related Art
Although there is, at present, a more advanced technology than the utilization of the traditional wood sleepers for making up a railway, due to economical reasons said wood sleepers are still being used, both in developing countries, where the investment standing is limited, as well as their technological capacity, and in developed countries, in this case in railways where investments for replacing wood sleepers by others more modern would be scantily profitable, and, then, the railway maintenance costs are too much high.
To date, for fastening a rail to the corresponding wood sleepers, nailing systems are used, by friction or by threading, so that both vibrations and the unitary forces, mainly those horizontal, acting on the rails when passing the trains, are transmitted, through said nailing means, to the sleeper holes involved.
Furthermore, said elements, already when being nailed into the holes, have a tendency towards splitting the wood and causing fissures, in which dampness due to the rain water, which favours corrosion effects, accumulates, and also an evident nailing slackening is produced, causing the track grid to grow weak.
This gradual slackening of anchorages compels to a constant maintenance under the supervision of skilled staff the costs of whose are very high.


SUMMARY OF THE INVENTION

The mechanism as proposed by the invention solves, in a fully satisfactory manner, the above mentioned problems, performing a very quick, simple and efficient fastening of rails to sleepers, which does not require any skilled staff, and it keeps indefinitely the original fastening level by means of a minimal maintenance, which is very inferior to that conventionally required.
This invention also contemplates aspects of the mechanism which facilitate both the implantation and the maintenance of same.
So then, and in a most definite way, the rail-to-wood sleeper fastening mechanism in railroads as proposed by the invention, starts from the wood carving of a sleeper, at each side of the implantation zone of the rail, of both chimneys designed to allow side branches of a sleeper to pass, in which a lower branche takes part, prefixed by nailing to the lower face of the sleeper, between the two chimneys, and to the ends of which the lateral and falling branches constituting the own clamp, are articulatedly united, which have an extreme upper and bent sector designed to be adapted to the upper face of the rail foot, this fastening being carried out with the collaboration of a pair of wedges inserted into the corresponding chimneys, the insertion of which tends to choke the clamp against the rail with elastic distortion of the side branches, so that the end sectors exert a constant pressure on the rail foot and the correlative one of this on the upper face of the sleeper.
According to other characteristic of the invention, and in order to avoid a discoupling of the wedges, it has been envisaged that these ones incorporate in their inner face a cogged bar coupled to a hook suitably fixed to the external face and corresponding of the sleeper, both cog a

REFERENCES:
patent: 1346965 (1920-07-01), Kehn
patent: 1531927 (1925-03-01), Hamilton
patent: 1818145 (1931-08-01), Macneir
patent: 2096775 (1937-10-01), Woodings
patent: 2167864 (1939-08-01), Bailey
patent: 2911154 (1959-11-01), Cushman
patent: 4216904 (1980-08-01), Vivion
patent: 4327865 (1982-05-01), Greene
patent: 4454985 (1984-06-01), Carter
International Search Report dated Apr. 14, 1998.

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