Patents by Inventor Ralph WOJTCZYK

Ralph WOJTCZYK 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).

  • Method and assembly for manufacturing a leaf spring
    Patent number: 9855710
    Abstract: The present invention relates to a method and an assembly for manufacturing a leaf spring from a fiber-composite material. To this end, tape material from a fiber material, which has been pre-impregnated with a matrix resin, for manufacturing a semi-finished leaf spring is wound under tension onto a winding core, wherein at least two cavities for shaping are configured on the winding core. The tape material here is pressed on by way of a contact pressure means, such that adjacent layers of the fiber material are adhesively interconnected and air pockets are removed. The semi-finished leaf spring under impingement by pressure and heat and under curing of the matrix resin is finally processed to form a leaf spring.
    Type: Grant
    Filed: October 22, 2015
    Date of Patent: January 2, 2018
    Assignee: BENTELER SGL GMBH & CO. KG.
    Inventors: Tobias Aubele, Ulrich Mueller, Hannah Paulus, Andreas Steinle, Bernd Wohletz, Ralph Wojtczyk
  • METHOD AND ASSEMBLY FOR MANUFACTURING A LEAF SPRING
    Publication number: 20160114537
    Abstract: The present invention relates to a method and an assembly for manufacturing a leaf spring from a fiber-composite material. To this end, tape material from a fiber material, which has been pre-impregnated with a matrix resin, for manufacturing a semi-finished leaf spring is wound under tension onto a winding core, wherein at least two cavities for shaping are configured on the winding core. The tape material here is pressed on by way of a contact pressure means, such that adjacent layers of the fiber material are adhesively interconnected and air pockets are removed. The semi-finished leaf spring under impingement by pressure and heat and under curing of the matrix resin is finally processed to form a leaf spring.
    Type: Application
    Filed: October 22, 2015
    Publication date: April 28, 2016
    Inventors: Tobias AUBELE, Ulrich MUELLER, Hannah PAULUS, Andreas STEINLE, Bernd WOHLETZ, Ralph WOJTCZYK