Patents by Inventor Lien Hoffman

Lien Hoffman 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).

  • Publication number: 20190142233
    Abstract: A cleaning bin mountable to an autonomous cleaning robot operable to receive debris from a floor surface includes an inlet positioned between lateral sides of the cleaning bin and an outlet configured to connect to a vacuum assembly, the vacuum assembly operable to direct an airflow from the inlet of the cleaning bin to the outlet of the cleaning bin. The cleaning bin also includes a debris chamber to receive debris from the airflow, an airflow chamber separated from the debris chamber by a prefilter, the prefilter forming at least a portion of a top surface of the debris chamber and at least a portion of a bottom surface of the airflow chamber, and a filter socket configured to receive a filter and provide the airflow to through the filter to the outlet of the cleaning bin, wherein the filter is positioned substantially perpendicular to the prefilter when the filter is positioned in the filter socket.
    Type: Application
    Filed: November 16, 2017
    Publication date: May 16, 2019
    Inventors: David Orrin Swett, Lien Hoffman, Yanhan Li