Patents by Inventor Dirk Krols

Dirk Krols has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20190359020
    Abstract: Railway traction vehicle with eight traction wheels, provided with two bogies each with a rubber wheel axle with two rubber wheels and a rail wheel axle with two steel rail wheels each pivoting around a swing axle fixed to a supporting framework, whereby the swing axle is positioned asymmetrically on the connecting line between the rail wheel axle and the rubber wheel axle with the ratio between the downward force on the rail wheel axle and the rubber wheel axle being actively controlled by increasing or decreasing the downward force on the rubber wheel axle and decreasing or increasing the downward force on the rail wheel axle.
    Type: Application
    Filed: September 12, 2017
    Publication date: November 28, 2019
    Inventor: Dirk KROLS
  • Patent number: 9981517
    Abstract: Railway traction vehicle (1) that is equipped with four rubber wheels (6) and with four steel rail wheels (7), and all eight (8×8) can exert traction simultaneously on the rails over which a train is hauled. Each of the eight wheels is equipped with an individual hydraulic or electric motor (5) that can be controlled individually. The traction vehicle is equipped with tilting bogies (8a, 8b) with which the steel rail wheels can be raised or lowered. The tilting bogies also enable ballast bodies (24a, 24b) to be detached and placed on supports, by lowering the level of the supporting frame (2).
    Type: Grant
    Filed: August 28, 2013
    Date of Patent: May 29, 2018
    Assignee: RENTALOC BVBA
    Inventors: Dirk Krols, Bart Raymaekers
  • Publication number: 20150224839
    Abstract: Railway traction vehicle (1) that is equipped with four rubber wheels (6) and with four steel rail wheels (7), and all eight (8×8) can exert traction simultaneously on the rails over which a train is hauled. Each of the eight wheels is equipped with an individual hydraulic or electric motor (5) that can be controlled individually. The traction vehicle is equipped with tilting bogies (8a, 8b) with which the steel rail wheels can be raised or lowered. The tilting bogies also enable ballast bodies (24a, 24b) to be detached and placed on supports, by lowering the level of the supporting frame (2).
    Type: Application
    Filed: August 28, 2013
    Publication date: August 13, 2015
    Inventors: Dirk Krols, Bart Raymaekers