Patents by Inventor Kwok-Lit Chan

Kwok-Lit Chan 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).

  • Floor types identifying device, dust suction device having the same, and vacuum cleaner having the same
    Patent number: 11882986
    Abstract: A floor types identifying device for use in a vacuum cleaner is disclosed, and comprises a current sensing unit coupled and a processing and controlling module. When a suction head is moved, a driving current of a roller brush driving motor is detected by the current sensing unit, such that the processing and controlling module judges that the suction head is moved on a specific floor that has a hard surface, a short-pile-carpeted surface or a long-pile-carpeted surface according to a variation of the driving current. Therefore, for a vacuum cleaner that is integrated with the floor types identifying device of the present invention, both suction power of the vacuum cleaner and driving power of the roller driving motor can be properly adjusted in response to the floor's surficial material type.
    Type: Grant
    Filed: March 11, 2022
    Date of Patent: January 30, 2024
    Assignee: TALENTONE HONG KONG LIMITED
    Inventors: Chia-Chang Hsu, Fu-Yuen Fong, Kwok Lit Chan
  • FLOOR TYPES IDENTIFYING DEVICE, DUST SUCTION DEVICE HAVING THE SAME, AND VACUUM CLEANER HAVING THE SAME
    Publication number: 20220296065
    Abstract: A floor types identifying device for use in a vacuum cleaner is disclosed, and comprises a current sensing unit coupled and a processing and controlling module. When a suction head is moved, a driving current of a roller brush driving motor is detected by the current sensing unit, such that the processing and controlling module judges that the suction head is moved on a specific floor that has a hard surface, a short-pile-carpeted surface or a long-pile-carpeted surface according to a variation of the driving current. Therefore, for a vacuum cleaner that is integrated with the floor types identifying device of the present invention, both suction power of the vacuum cleaner and driving power of the roller driving motor can be properly adjusted in response to the floor's surficial material type.
    Type: Application
    Filed: March 11, 2022
    Publication date: September 22, 2022
    Applicant: TALENTONE HONG KONG LIMITED
    Inventors: CHIA-CHANG HSU, Fu-Yuen Fong, Kwok Lit Chan
  • Luminescent apparatus
    Publication number: 20040179376
    Abstract: A lighting device (10, 11) including:
    Type: Application
    Filed: March 10, 2003
    Publication date: September 16, 2004
    Applicant: Everjet Industrial Limited
    Inventors: Kwok Lit Chan, Tai Wing David Yeung
  • Lighting element for luminescent apparatus
    Patent number: D504742
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: May 3, 2005
    Assignee: Everjet Industrial Limited
    Inventors: Kwok-Lit Chan, David Tai-Wing Yeung