Patents by Inventor Tatsuya Sugihara

Tatsuya Sugihara 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).

  • Methods of modifying material flow mode during machining and products formed thereby
    Patent number: 11548107
    Abstract: Methods of inducing segmented flow in a material in which a ductile flow mode would otherwise occur during machining. A monolayer molecular film is formed on a surface of a body of a material in a state such that the material exhibits ductile flow when subjected to shear. The monolayer molecular film has molecules each having a head group adsorbed to the surface, a terminal group, and a hydrocarbon chain therebetween having a chain length of greater than 6. A surface portion of the body is removed by engaging the body with a tool in a contact region below the surface of the body and moving the tool relative to the body to remove the surface portion and the monolayer molecular film thereon. The monolayer molecular film induces segmented flow in the material during the removing of the surface portion.
    Type: Grant
    Filed: November 6, 2020
    Date of Patent: January 10, 2023
    Assignee: Purdue Research Foundation
    Inventors: Tatsuya Sugihara, Srinivasan Chandrasekar, Anirudh Udupa, Koushik Viswanathan, Kevin Paul Trumble, James Bradley Mann
  • METHODS OF MODIFYING MATERIAL FLOW MODE DURING MACHINING AND PRODUCTS FORMED THEREBY
    Publication number: 20210205940
    Abstract: Methods of inducing segmented flow in a material in which a ductile flow mode would otherwise occur during machining. A monolayer molecular film is formed on a surface of a body of a material in a state such that the material exhibits ductile flow when subjected to shear. The monolayer molecular film has molecules each having a head group adsorbed to the surface, a terminal group, and a hydrocarbon chain therebetween having a chain length of greater than 6. A surface portion of the body is removed by engaging the body with a tool in a contact region below the surface of the body and moving the tool relative to the body to remove the surface portion and the monolayer molecular film thereon. The monolayer molecular film induces segmented flow in the material during the removing of the surface portion.
    Type: Application
    Filed: November 6, 2020
    Publication date: July 8, 2021
    Inventors: Tatsuya Sugihara, Srinivasan Chandrasekar, Anirudh Udupa, Koushik Viswanathan, Kevin Paul Trumble, James Bradley Mann