Railway switches and signals – Switches – Chairs and plates
Reexamination Certificate
1999-07-12
2001-02-20
Le, Mark T. (Department: 3617)
Railway switches and signals
Switches
Chairs and plates
Reexamination Certificate
active
06189840
ABSTRACT:
The present invention relates to a roller device for displacement of switching rails of track shifting apparatuses, commonly used in railroads. As it is well known by those skilled in the art of switching rails displacement, the switch points of the track-ways are provided with track shifting apparatuses, better known as AMV [track shifting apparatuses], which often require cleaning and lubrication services to prevent them from locking.
Such frequent maintenance and cleaning services occurs due to the friction of the switching rails against the slide chair, as well as the contamination which takes place in the ballast, as well as in the slide chair itself.
In practice, there has been currently about eight monthly interventions in the railroad for cleaning and maintenance services on the track shifting apparatuses, causing halts in the regular operation of the apparatus under maintenance service.
Such successive stoppages for maintenance services not only generate a high maintenance cost but also cause environment and ballast contamination.
Accordingly, an object of the present invention is to provide a roller device for displacement of switching rails which reduces from eight to one the monthly maintenance and cleaning interventions in the AMV.
Another object of the present invention is to provide a roller device for displacement of switching rails which does not become worn out by the friction of the switching rail against the slide chair.
Another object of the present invention is to provide a roller device for displacement of switching rails which is not affected by the contamination which takes place in the ballast and also in the slide chair itself.
Another object of the present invention is to provide a roller device for displacement of switching rails which does not require lubrication out of the business hours or working days.
Another object of the present invention is to provide a roller device for displacement of switching rails which eliminates the friction of the switching rails against the slide chair during the operation of the AMV so as to make it unnecessary to lubricate the slide chairs and diminish the stress of the switch machine.
REFERENCES:
patent: 5501418 (1996-03-01), Humphrey et al.
patent: 5582371 (1996-12-01), Humphrey et al.
patent: 5622340 (1997-04-01), Turner et al.
patent: 5628480 (1997-05-01), Vrsecky et al.
Fehlberg José Roberto
Ferreira Reynaldo Lopes
Mantovan Gilson Etore
Pires Isnad Torres
Companhia Vale Do Rio Doce
Helfgott & Karas P.C.
Le Mark T.
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