Patents by Inventor Arup K. Gangopadhyay

Arup K. Gangopadhyay 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).

  • Powertrain component with adherent amorphous or nanocrystalline ceramic coating system
    Patent number: 5309874
    Abstract: A powertrain component (10) for use in an internal combustion engine, the powertrain component comprising a coating system including an amorphous or nanocrystalline ceramic film (30). The powertrain component (10) also includes an interlayer (42) formed between the film and the component. The interlayer (42) accommodates stresses engendered by formation of the film (30), and thereby improves adherence of the film (30) to the substrate (10). To enable engineering of desired surface properties, the film (30), the interlayer (42), or both may be provided with a graded composition profile.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: May 10, 1994
    Assignee: Ford Motor Company
    Inventors: Pierre A. Willermet, Arup K. Gangopadhyay, Michael A. Tamor, William C. Vassell, Margherita Zanini-Fisher
  • Powertrain component with adherent film having a graded composition
    Patent number: 5249554
    Abstract: A powertrain component (10) for use in an internal combustion engine, the powertrain component comprising a coating system including a film (30) selected from the group consisting of amorphous hydrogenated carbon, silicon-doped amorphous hydrogenated carbon, boron-, nitrogen-, boron nitride-, or metal-doped amorphous hydrogenated carbon, and mixtures thereof. The film (30) is formed on the powertrain component (10), and imparts the characteristics of low friction and wear resistance to the component. The powertrain component (10) also includes an interlayer (42) formed between the film and the component. The interlayer (42) accommodates stresses engendered by formation of the film (30), and thereby improves adherence of the film (30) to the substrate (10). To enable engineering of desired surface properties, the film (30), the interlayer (42), or both may be provided with a graded composition.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: October 5, 1993
    Assignee: Ford Motor Company
    Inventors: Michael A. Tamor, Pierre A. Willermet, William C. Vassell, Arup K. Gangopadhyay
  • Powertrain component with amorphous hydrogenated carbon film
    Patent number: 5237967
    Abstract: A powertrain component such as a valve lifter (10) for use in an internal combustion engine (12), the valve lifter (10) being positioned between a cam (14) and a valve stem (16). An amorphous hydrogenated carbon film (28) is formed on the component, the film (28) imparting the characteristics of low friction and wear resistance. Also disclosed is an interlayer which improves adherence by imparting the properties of improved absorption of mechanical stresses and chemical compatibility between the film (28) and the substrate (10). Methods for forming the film (28) and interlayer are also disclosed.
    Type: Grant
    Filed: January 8, 1993
    Date of Patent: August 24, 1993
    Assignee: Ford Motor Company
    Inventors: Pierre A. Willermet, Arup K. Gangopadhyay, Michael A. Tamor, William C. Vassell