Patents by Inventor Ming J. Liou

Ming J. Liou 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).

  • Electrical contacts
    Patent number: 4687274
    Abstract: A pair of elements for providing slidable electrical contact therebetween wherein the contact surface of at least one of the elements comprises a plurality of contact portions and a plurality of depressed portions in between the contact portions so that wear particles which are generated between their contact surfaces as the elements are moved relative to each other are effectively swept from between the contact surfaces into the depressed portions where they are entrapped. Such operation tends to maintain a low electrical resistance between the elements over many cycles of use.
    Type: Grant
    Filed: May 10, 1984
    Date of Patent: August 18, 1987
    Assignee: Massachusetts Institute of Technology
    Inventors: Nam P. Suh, Nannaji Saka, Ming J. Liou