Patents by Inventor Truong M. Ha

Truong M. Ha 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).

  • Maintaining constant pick-up broom pattern
    Patent number: 4525888
    Abstract: An overcenter, spring loaded linkage is disclosed for applying a lifting force to a pick-up broom of a street sweeper when the broom is new and heavy, and for applying a downward pressure on the broom when the broom is worn and light in weight. The linkage maintains a substantially constant pick-up broom pattern on the surface being swept throughout the useful life of the broom in spite of a substantial reduction in broom diameter due to wear.
    Type: Grant
    Filed: September 9, 1983
    Date of Patent: July 2, 1985
    Assignee: FMC Corporation
    Inventors: Douglas A. Bargiel, Edward M. Assony, Truong M. Ha, Richard B. Rosseau