Patents by Inventor Fengying Dong

Fengying Dong 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).

  • Rechargeable power tool, control unit and recording medium
    Patent number: 8324845
    Abstract: A rechargeable power tool includes a direct current motor, a switching circuit, at least one speed setting unit, a duty ratio setting unit, a drive unit, an operation amount detecting unit, an abnormality determining unit, and a determination threshold setting unit. The abnormality determining unit compares an operation amount detected by the operation amount detecting unit and a determination threshold set based on the operation amount to thereby determine whether or not an operation state of the rechargeable power tool is abnormal. The determination threshold setting unit sets the determination threshold in a continuous or stepwise manner in accordance with a rotation speed set by the speed setting unit.
    Type: Grant
    Filed: May 22, 2009
    Date of Patent: December 4, 2012
    Assignee: Makita Corporation
    Inventors: Jiro Suzuki, Fengying Dong, Takuya Kusakawa
  • Rechargeable power tool, control unit and recording medium
    Publication number: 20090295313
    Abstract: A rechargeable power tool includes a direct current motor, a switching circuit, at least one speed setting unit, a duty ratio setting unit, a drive unit, an operation amount detecting unit, an abnormality determining unit, and a determination threshold setting unit. The abnormality determining unit compares an operation amount detected by the operation amount detecting unit and a determination threshold set based on the operation amount to thereby determine whether or not an operation state of the rechargeable power tool is abnormal. The determination threshold setting unit sets the determination threshold in a continuous or stepwise manner in accordance with a rotation speed set by the speed setting unit.
    Type: Application
    Filed: May 22, 2009
    Publication date: December 3, 2009
    Applicant: MAKITA CORPORATION
    Inventors: Jiro Suzuki, Fengying Dong, Takuya Kusakawa