Patents by Inventor Dongyun Hua

Dongyun Hua 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: 11020933
    Abstract: The present invention relates to techniques for lowering friction between moving surfaces of, for example, an internal combustion engine. Friction reduction is achieved by adding texture modifications to surfaces that come in contact with each other. Texture modifications that reduce friction in accordance with the present invention include dimples of varying geometries and depths ion the surfaces of components. The present invention also relates to the fabrication technique for applying the texture to the surfaces. In another embodiment, the patterned soft mask is applied onto a large surface (flat or curved including cylindrical rollers surfaces) to be followed by electrochemical etching to imprint the textures onto the component And, in another embodiment, a diamond-like-carbon (DLC) film may be applied to the turbine component to also reduce friction.
    Type: Grant
    Filed: March 1, 2019
    Date of Patent: June 1, 2021
    Assignee: The George Washington University
    Inventors: Stephen M. Hsu, Yang Jing, Yufei Mo, Dongyun Hua, Ming Chen
  • Publication number: 20190193372
    Abstract: The present invention relates to techniques for lowering friction between moving surfaces of, for example, an internal combustion engine. Friction reduction is achieved by adding texture modifications to surfaces that come in contact with each other. Texture modifications that reduce friction in accordance with the present invention include dimples of varying geometries and depths ion the surfaces of components. The present invention also relates to the lubrication technique for applying the texture to the surfaces. In another embodiment, the patterned soft mask is applied onto a large surface (flat or curved including cylindrical rollers surfaces) to be followed by electrochemical etching to imprint the textures onto the component And, in another embodiment, a diamond-like-carbon (DLC) film may be applied to the turbine component to also reduce friction.
    Type: Application
    Filed: March 1, 2019
    Publication date: June 27, 2019
    Inventors: Stephen M. HSU, Yang JING, Yufei MO, Dongyun HUA, Ming CHEN
  • Patent number: 10245806
    Abstract: The present invention relates to techniques for lowering friction between moving surfaces of, for example, an internal combustion engine. Friction reduction is achieved by adding texture modifications to surfaces that come in contact with each other. Texture modifications that reduce friction in accordance with the present invention include dimples of varying geometries and depths ion the surfaces of components. The present invention also relates to the fabrication technique for applying the textures to the surfaces. In another embodiment, the patterned soft mask is applied onto a large surface (flat or curved including cylindrical rollers surfaces) to be followed by electrochemical etching to imprint the textures onto the component. And, in another embodiment, a diamond-like-carbon (DLC) film may be applied to the turbine component to also reduce friction.
    Type: Grant
    Filed: February 21, 2012
    Date of Patent: April 2, 2019
    Assignee: The George Washington University
    Inventors: Stephen M. Hsu, Yang Jing, Yufei Mo, Dongyun Hua, Ming Chen
  • Publication number: 20140170377
    Abstract: The present invention relates to techniques for lowering friction between moving surfaces of, for example, an internal combustion engine. Friction reduction is achieved by adding texture modifications to surfaces that come in contact with each other. Texture modifications that reduce friction in accordance with the present invention include dimples of varying geometries and depths ion the surfaces of components. The present invention also relates to the fabrication technique for applying the textures to the surfaces. In another embodiment, the patterned soft mask is applied onto a large surface (flat or curved including cylindrical rollers surfaces) to be followed by electrochemical etching to imprint the textures onto the component. And, in another embodiment, a diamond-like-carbon (DLC) film may be applied to the turbine component to also reduce friction.
    Type: Application
    Filed: February 21, 2012
    Publication date: June 19, 2014
    Applicant: The George Washington University
    Inventors: Stephen M. Hsu, Yang Jing, Yufei Mo, Dongyun Hua, Ming Chen
  • Patent number: 8568827
    Abstract: The present disclosure is directed to a method of making a textured coating on a wear surface of a component. The method includes applying a mask on the surface and depositing a tribological coating on the surface. The method further includes removing the mask.
    Type: Grant
    Filed: May 17, 2010
    Date of Patent: October 29, 2013
    Assignee: Caterpillar Inc.
    Inventors: Shuangbio Liu, Chuong Quang Dam, Bao Feng, Dongyun Hua
  • Publication number: 20110048857
    Abstract: In one aspect a method for lubricating a tribosystem is provided that may include providing a new tribosystem including at least two solid surfaces that interact during operation of the tribosystem and providing lubrication oil for lubricating the tribosystem. The method may further include operating the tribosystem while lubricating the tribosystem with the lubrication oil during an initial period and supplying anti-wear additives to the lubrication oil at the end of the initial period. In another aspect a lubrication assembly for containing lubrication oil may be provided. The lubrication assembly may include an anti-wear additive storage and a releaser that is configured for releasing anti-wear additive from the anti-wear additive storage into the lubrication oil after an initial period of operation.
    Type: Application
    Filed: September 1, 2009
    Publication date: March 3, 2011
    Applicant: CATERPILLAR INC.
    Inventors: Andrew N. McGilvray, Pinghui Wang, Dongyun Hua
  • Publication number: 20100221425
    Abstract: The present disclosure is directed to a method of making a textured coating on a wear surface of a component. The method includes applying a mask on the surface and depositing a tribological coating on the surface. The method further includes removing the mask.
    Type: Application
    Filed: May 17, 2010
    Publication date: September 2, 2010
    Applicant: CATERPILLAR, INC.
    Inventors: Shuangbiao Liu, Chuong Quang Dam, Bao Feng, Dongyun Hua
  • Publication number: 20080131604
    Abstract: The present disclosure is directed to a method of making a textured coating on a wear surface of a component. The method includes applying a mask on the surface and depositing a tribological coating on the surface. The method further includes removing the mask.
    Type: Application
    Filed: November 30, 2006
    Publication date: June 5, 2008
    Inventors: Shuangbiao Liu, Chuong Quang Dam, Bao Feng, Dongyun Hua