Patents by Inventor Sandra Matos Cordeiro Costa

Sandra Matos Cordeiro Costa 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).

  • Piston ring and process for the manufacture thereof
    Patent number: 10634248
    Abstract: A piston ring for a piston of an internal combustion engine may include a body composed of a ferrous material. The body may have an upper portion, a lower portion opposed to the upper portion, an internal portion configured to face towards a piston groove and an external portion opposed to the internal portion. An upper chamfer may be disposed between the upper portion and the external portion. A lower chamfer may be disposed between the lower portion and the external portion. The upper portion, the lower portion and the internal portion may each have a nitrided layer. The external portion, the upper chamfer and the lower chamfer may include at least one ion plated coating layer. The nitrided portion in at least a superficial layer may have a hardness of 700 HV or less.
    Type: Grant
    Filed: February 9, 2015
    Date of Patent: April 28, 2020
    Assignees: MAHLE METAL LEVE S/A, MEHLE INTERNATIONAL GMBH
    Inventors: Sandra Matos Cordeiro Costa, Gisela Ablas Marques
  • PISTON RING AND PROCESS FOR THE MANUFACTURE THEREOF
    Publication number: 20170016538
    Abstract: A piston ring for a piston of an internal combustion engine may include a body composed of a ferrous material. The body may have an upper portion, a lower portion opposed to the upper portion, an internal portion configured to face towards a piston groove and an external portion opposed to the internal portion. An upper chamfer may be disposed between the upper portion and the external portion. A lower chamfer may be disposed between the lower portion and the external portion. The upper portion, the lower portion and the internal portion may each have a nitrided layer. The external portion, the upper chamfer and the lower chamfer may include at least one ion plated coating layer. The nitrided portion in at least a superficial layer may have a hardness of 700 HV or less.
    Type: Application
    Filed: February 9, 2015
    Publication date: January 19, 2017
    Inventors: Sandra Matos Cordeiro Costa, Gisela Ablas Marques