Patents by Inventor Algimantas Bubulis

Algimantas Bubulis 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).

  • Patent number: 10161840
    Abstract: A device for evaluating working surface fretting wear characteristics comprises a bottom holder with a sample secured thereto, springs displacing in the X and Y direction, multilayer piezo elements moving in the X, Y, and Z directions, a housing, a top plate/holder, a linear air bearing housing, a spherical upper sample, a linear air bearing shaft, a three-way force sensor, a moving support of the flat air bearing and the flat air bearing housing, a high frequency generator, an amplifier, a controller, an electrical filter, a computer, a force sensor signal amplifier, and a flat air bearing. Instead of springs, it can comprise additional multilayer piezo elements moving in the X and Y directions. The device performs testing surface wear under conditions nearer to actual fretting wear conditions, continuously observing friction pair condition changes during testing and evaluating wear characteristics of the tested material more accurately.
    Type: Grant
    Filed: April 16, 2015
    Date of Patent: December 25, 2018
    Assignee: Aleksandras Stulginskis University
    Inventors: Juozas Padgurskas, Albinas Andriusis, Ramutis Bansevicius, Algimantas Bubulis, Vytautas Jurenas, Audrius Zunda
  • Publication number: 20170234785
    Abstract: A device for evaluating working surface fretting wear characteristics comprises a bottom holder with a sample secured thereto, springs displacing in the X and Y direction, multilayer piezo elements moving in the X, Y, and Z directions, a housing, a top plate/holder, a linear air bearing housing, a spherical upper sample, a linear air bearing shaft, a three-way force sensor, a moving support of the flat air bearing and the flat air bearing housing, a high frequency generator, an amplifier, a controller, an electrical filter, a computer, a force sensor signal amplifier, and a flat air bearing. Instead of springs, it can comprise additional multilayer piezo elements moving in the X and Y directions. The device performs testing surface wear under conditions nearer to actual fretting wear conditions, continuously observing friction pair condition changes during testing and evaluating wear characteristics of the tested material more accurately.
    Type: Application
    Filed: April 16, 2015
    Publication date: August 17, 2017
    Inventors: Juozas Padgurskas, Albinas Andriusis, Ramutis Bansevicius, Algimantas Bubulis, Vytautas Jurenas, Audrius Zunda