Rolled Patents (Class 238/61)
  • Patent number: 10704204
    Abstract: The present invention describes a railroad sleeper (1) for fixation of at least a pair of rails (2,2?) of a railroad network, comprising a contact surface (3), wherein each rail of the pair of rails (2,2?) is fixed spaced apart from each other, the railroad sleeper (1) being configured by comprising a hollow sector (4) delimited by association of the contact surface (3) with the anchorage walls (5,5?), thus establishing a free portion (17) adjacent to the anchorage walls (5,5?) and opposite the contact surface (3). The present invention further describes an embodiment in which the hollow sector (4) of the railroad sleeper is delimited by a support surface and the process of manufacturing a railroad sleeper.
    Type: Grant
    Filed: November 11, 2015
    Date of Patent: July 7, 2020
    Assignee: Braskem S.A.
    Inventors: Guilherme Longa Nose, Daniel Wenzer Trevizan, Luiz Francisco Muniz da Silva, Jorge Luis Goudene Spada, Claudio Pereira da Silva Zamith, Walter Vidon Junior, Renato Teixeira Vargas
  • Patent number: 4728030
    Abstract: According to the invention there is provided a railway sleeper having a formed inverted channel-shaped section the ends of which have their upper surfaces downwardly inclined and shaped in a corrugated fashion to add strength and rigidity to said ends.The `dished spade` end contour of the sleeper may be pressed from a standard rolled steel channel section. By virtue of the stronger ends thus produced these portions can sustain a greater load than the conventional design hitherto--this means that the length of the sleeper according to this invention may be much shorter, e.g. 20% less than the conventional design for the same load bearing capacity, representing a considerable cost savings. The shape facilitates stacking, and lateral insertion beneath the track for track maintenance and replacement etc.
    Type: Grant
    Filed: December 15, 1986
    Date of Patent: March 1, 1988
    Assignee: British Steel Corporation
    Inventor: William H. Hodgson