Patents by Inventor Nagappan Chandrasekaran

Nagappan Chandrasekaran 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: 8458896
    Abstract: A robotic end-effector for high-speed precision alignment and assembly of of a spacer ring onto a motor-hub assembly has a holding device operable for temporarily holding the spacer ring. The spacer ring is to be aligned and assembled to the motor-hub assembly. The robotic end-effector has a course alignment device operable for locating the holding device with respect to a locating feature that is coupled with the motor-hub assembly. The robotic end-effector has a retractor operable for disengaging the course alignment device from the locating feature. The robotic end-effector has a moveable base whereby lateral compliance is provided for the holding device, enabling motion of the spacer ring with respect to the motor-hub assembly, thereby enabling fine alignment of the spacer ring with the motor-hub assembly when the spacer ring touches the motor-hub assembly.
    Type: Grant
    Filed: November 25, 2008
    Date of Patent: June 11, 2013
    Assignee: HGST Netherlands B.V.
    Inventors: Nagappan Chandrasekaran, Ching Keat Tay, Qihong Wang
  • Publication number: 20100128389
    Abstract: A robotic end-effector for high-speed precision alignment and assembly of components has a holding device operable for temporarily holding a second component. The second component is to be aligned and assembled to a first component. The robotic end-effector has a course alignment device operable for locating the holding device with respect to a locating feature that is coupled with the first component. The robotic end-effector has a retractor operable for disengaging the course alignment device from the locating feature. The robotic end-effector has a moveable base whereby lateral compliance is provided for the holding device, enabling motion of the second component with respect to the first component, thereby enabling fine alignment of the second component with the first component when the second component touches the first component.
    Type: Application
    Filed: November 25, 2008
    Publication date: May 27, 2010
    Inventors: Nagappan Chandrasekaran, Ching Keat Tay, Qihong Wang