Patents by Inventor Fangzheng Guo

Fangzheng Guo 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: 20240122423
    Abstract: An autonomous mobile cleaning robot can include a cleaning assembly and a drive wheel. The cleaning assembly can be configured to lift debris from a surface and direct the debris into a dustpan. The drive wheel can be configured to move the autonomous mobile cleaning robot on the surface. The drive wheel can include a first set of treads configured to climb an obstacle, a second set of treads configured to maintain continuous contact with a surface of a floor, and third set of treads configured to direct water underneath the third set of treads towards a center of the autonomous mobile cleaning robot.
    Type: Application
    Filed: October 17, 2022
    Publication date: April 18, 2024
    Inventor: Fangzheng Guo
  • 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
  • Patent number: 11857139
    Abstract: A mobile cleaning robot can include a body, a drive wheel, and a wheel stop. The drive wheel can be connected to the body and can be operable to move the mobile cleaning robot about an environment. The wheel stop can be movable with respect to the body and the drive wheel between a stop position and a release position. The wheel stop can be engageable with the drive wheel in the stop position to limit vertical travel of the drive wheel with respect to the body.
    Type: Grant
    Filed: July 29, 2021
    Date of Patent: January 2, 2024
    Assignee: iRobot Corporation
    Inventors: Timothy R. Ohm, Erik Edward Steltz, Russell Walter Morin, Fangzheng Guo
  • Publication number: 20230346182
    Abstract: A mobile cleaning robot can include a body, a drive wheel, and a wheel stop. The drive wheel can be connected to the body and can be operable to move the mobile cleaning robot about an environment. The wheel stop can be movable with respect to the body and the drive wheel between a stop position and a release position. The wheel stop can be engageable with the drive wheel in the stop position to limit vertical travel of the drive wheel with respect to the body.
    Type: Application
    Filed: June 30, 2023
    Publication date: November 2, 2023
    Inventors: Timothy R. Ohm, Erik Edward Steltz, Russell Walter Morin, Fangzheng Guo
  • Publication number: 20230346181
    Abstract: A mobile cleaning robot can be movable within an environment. The mobile cleaning robot can include a body, a cleaning head, a biasing element, and a linkage. The cleaning head can be operable to extract debris from a floor surface and can be configured to move vertically relative to the body between an extended position and a retracted position. The biasing element can be connected to the body and can be movable with the cleaning head. The linkage can be connected to the cleaning head and the biasing element. The linkage can be rotatably connected to the body to, together with the biasing element, bias the cleaning head toward the retracted position.
    Type: Application
    Filed: April 29, 2022
    Publication date: November 2, 2023
    Inventors: Timothy R. Ohm, David O. Swett, Fangzheng Guo
  • Publication number: 20230301477
    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: Application
    Filed: May 30, 2023
    Publication date: September 28, 2023
    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
  • Patent number: 11678780
    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: June 22, 2022
    Date of Patent: June 20, 2023
    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
  • Publication number: 20230032691
    Abstract: A mobile cleaning robot can include a body, a drive wheel, and a wheel stop. The drive wheel can be connected to the body and can be operable to move the mobile cleaning robot about an environment. The wheel stop can be movable with respect to the body and the drive wheel between a stop position and a release position. The wheel stop can be engageable with the drive wheel in the stop position to limit vertical travel of the drive wheel with respect to the body.
    Type: Application
    Filed: July 29, 2021
    Publication date: February 2, 2023
    Inventors: Timothy R. Ohm, Erik Edward Steltz, Russell Walter Morin, Fangzheng Guo
  • Publication number: 20220313037
    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: Application
    Filed: June 22, 2022
    Publication date: October 6, 2022
    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
  • Patent number: 11369242
    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 11, 2020
    Date of Patent: June 28, 2022
    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
  • Publication number: 20220104677
    Abstract: A mobile cleaning robot can include a body, a pad assembly, and a pad drive system. The pad assembly can be connected to the body and can be movable relative thereto. The pad drive system can be connected to the body and can be operable to move the pad assembly relative to the body between a stored position and a cleaning position.
    Type: Application
    Filed: July 29, 2021
    Publication date: April 7, 2022
    Inventors: Michael G. Sack, Erik Edward Steltz, Russell Walter Morin, Victor Puksta, Timothy R. Ohm, Brian Cleve Benson, JR., Peter J. Lydon, Timothy James Haughton, Fangzheng Guo
  • Publication number: 20200352402
    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: Application
    Filed: May 11, 2020
    Publication date: November 12, 2020
    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
  • Patent number: 10744650
    Abstract: A mobile robot includes a recessed well in a top surface of the mobile robot, at least one capacitive sensor underlying the recessed well and having a first region and a second region, one or more mobility sensors, and a controller coupled to the at least one capacitive sensor and the one or more mobility sensors. The controller is configured to determine an operating status of the mobile robot responsive to output signals from the one or more mobility sensors, and selectively disregard an input at a first portion of the recessed well corresponding to the first region of the at least one capacitive sensor based on the operating status of the mobile robot.
    Type: Grant
    Filed: September 4, 2018
    Date of Patent: August 18, 2020
    Assignee: iRobot Corporation
    Inventors: Rogelio Manfred Neumann, Landon Unninayar, Fangzheng Guo, Qingtai Zhai, John P. O'Brien, Benjamin H. Schriesheim, Travis Gschrey, Milan Modh
  • Publication number: 20200070355
    Abstract: A mobile robot includes a recessed well in a top surface of the mobile robot, at least one capacitive sensor underlying the recessed well and having a first region and a second region, one or more mobility sensors, and a controller coupled to the at least one capacitive sensor and the one or more mobility sensors. The controller is configured to determine an operating status of the mobile robot responsive to output signals from the one or more mobility sensors, and selectively disregard an input at a first portion of the recessed well corresponding to the first region of the at least one capacitive sensor based on the operating status of the mobile robot.
    Type: Application
    Filed: September 4, 2018
    Publication date: March 5, 2020
    Inventors: Rogelio Manfred Neumann, Landon Unninayar, Fangzheng Guo, Qingtai Zhai, John P. O'Brien, Benjamin H. Schriesheim, Travis Gschrey, Milan Modh