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Priority to ES0053237UpriorityCriticalpatent/ES53237Y/en
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Machines For Laying And Maintaining Railways
(AREA)
Abstract
An improved sleeper, for railroad, characterized essentially by the fact of comprising a general body of strong concrete in any shape, which body has the particularity of being embedded in its upper part, in an equidistant position from the ends, separate wooden blocks , dry and treated, on which goes a metal plate through which the lag screws pass to hold the rail. (Machine-translation by Google Translate, not legally binding)
ES0053237U1956-03-151956-03-15
Sleeper perfected for railroad tracks
ExpiredES53237Y
(en)
A improvement in the insulating plates for elastic couplings of the rails to the traviesas (Machine-translation by Google Translate, not legally binding)