Patents by Inventor Ann Chow

Ann Chow 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).

  • Reducing cleaning roller amplitude and speed oscillations of a cleaning robot
    Patent number: 11930989
    Abstract: A roller assembly for a mobile cleaning system for cleaning a work surface can include a drive shaft, a sheath, a bushing, and a bushing shroud. The drive shaft can be rotatable about a drive axis, and the drive shaft can include a driven end and an opposite bushing end. The sheath can be supported by the drive shaft and the sheath can be rotatable with the drive shaft. The sheath can include a shell engageable with the work surface. The bushing can be located about the bushing end of the drive shaft. The bushing shroud can be connected to the bushing. The sheath and the drive shaft can be together rotatable with respect to the bushing and the bushing shroud, the bushing shroud can include an outer portion defining a first radius of curvature and a recessed portion connected to the outer portion.
    Type: Grant
    Filed: May 30, 2023
    Date of Patent: March 19, 2024
    Assignee: iRobot Corporation
    Inventors: Hao-Yun Chow, Patrick Chow, Ke Ting Gao, Fangzheng Guo, Jennifer Ann Mauger, Rogelio Manfred Neumann, Jian Yun Pi, Michael G. Sack, Rubal Verma
  • Novelty figurine
    Patent number: D413152
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: August 24, 1999
    Inventor: Ann Chow