Patents by Inventor Alexander S. Cooper

Alexander S. Cooper 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 METHOD FOR MANUFACTURING A PISTON RING
    Publication number: 20220333687
    Abstract: An unchamfered piston ring that is pre-treated by grit blasting to a defined roughness, followed by PVD coating with a metal nitride to a thickness of at least 10 ?m, leaving peaks and valleys in the coated piston ring. The coated piston ring is then lapped to remove the peaks without penetrating the coating, so that valleys and plateaus remain in the coated surface. The resulting piston ring exhibits superior coating retention due to the increased surface area created by the grit blasting, and yet also superior performance, as the cavities remaining increase the porosity of the coating and thus enhance the lubrication of the ring.
    Type: Application
    Filed: July 5, 2022
    Publication date: October 20, 2022
    Applicant: MAHLE International GmbH
    Inventors: Thomas J. SMITH, Thomas STONG, Andrea C. PAUL, Alexander S. COOPER
  • PISTON RING AND METHOD FOR MANUFACTURING A PISTON RING
    Publication number: 20190368607
    Abstract: An unchamfered piston ring that is pre-treated by grit blasting to a defined roughness, followed by PVD coating with a metal nitride to a thickness of at least 10 ?m, leaving peaks and valleys in the coated piston ring. The coated piston ring is then lapped to remove the peaks without penetrating the coating, so that valleys and plateaus remain in the coated surface. The resulting piston ring exhibits superior coating retention due to the increased surface area created by the grit blasting, and yet also superior performance, as the cavities remaining increase the porosity of the coating and thus enhance the lubrication of the ring.
    Type: Application
    Filed: May 29, 2018
    Publication date: December 5, 2019
    Applicant: MAHLE International GmbH
    Inventors: Thomas J. SMITH, Thomas STONG, Andrea C. PAUL, Alexander S. Cooper
  • Inlaid ring with plated lateral side
    Patent number: 10428945
    Abstract: A method of forming a piston ring includes providing a base portion formed of a metallic material, the base portion having a first surface, and a second surface that is opposite the first surface, the base portion configured to interface with a piston ring groove. The method includes grinding the first surface to form a reference surface, applying a chromium layer to the second surface, and grinding the chromium layer to reduce a surface roughness of the chromium layer.
    Type: Grant
    Filed: October 12, 2016
    Date of Patent: October 1, 2019
    Assignee: Mahle International GmbH
    Inventors: Thomas J. Smith, Alexander S. Cooper, Robert J. Piccard, Timothy Andros, Claudinei J. de Oliveira, Jason P. Bieneman, Victor H. Tapia Ramirez, Terry Pecott
  • INLAID RING WITH PLATED LATERAL SIDE
    Publication number: 20170108122
    Abstract: A method of forming a piston ring includes providing a base portion formed of a metallic material, the base portion having a first surface, and a second surface that is opposite the first surface, the base portion configured to interface with a piston ring groove. The method includes grinding the first surface to form a reference surface, applying a chromium layer to the second surface, and grinding the chromium layer to reduce a surface roughness of the chromium layer.
    Type: Application
    Filed: October 12, 2016
    Publication date: April 20, 2017
    Applicant: Mahle International GmbH
    Inventors: Thomas J. Smith, Alexander S. Cooper, Robert J. Piccard, Timothy Andros, Claudinei J. de Oliveira, Jason P. Bieneman, Victor H. Tapia Ramirez, Terry Pecott