Patents by Inventor Ka Yue Lo

Ka Yue Lo 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).

  • Battery low-voltage protecting device
    Patent number: 7166990
    Abstract: A battery low-voltage protecting device is disclosed as including an input terminal connected, via a first lead wire and a switch driver circuit, with a positive terminal of a battery; an output terminal connected, via a second lead wire, with a load; a ground terminal connected, via a third lead wire, with an automobile body and a negative terminal of the battery; a declining voltage integrating circuit; a voltage detector; and a timer switch control circuit; in which the voltage of said declining voltage integrating circuit rises when the voltage of said battery rises, and falls when the voltage of said battery falls; and the declining voltage integrating circuit can differentiate between a quick fall in the voltage of the battery from a slow fall in the voltage of the battery, and output voltage signals to the voltage detector; and the voltage sensor can receive voltage signals outputted by the declining voltage integrating circuit, to compare the voltage signals with a pre-defined voltage level, and to ou
    Type: Grant
    Filed: May 12, 2004
    Date of Patent: January 23, 2007
    Assignee: Kare Hong Kong Limited
    Inventor: Ka Yue Lo
  • Battery low-voltage protecting device
    Publication number: 20040227492
    Abstract: A battery low-voltage protecting device is disclosed as including an input terminal connected, via a first lead wire and a switch driver circuit, with a positive terminal of a battery; an output terminal connected, via a second lead wire, with a load; a ground terminal connected, via a third lead wire, with an automobile body and a negative terminal of the battery; a declining voltage integrating circuit; a voltage detector; and a timer switch control circuit; in which the voltage of said declining voltage integrating circuit rises when the voltage of said battery rises, and falls when the voltage of said battery falls; and the declining voltage integrating circuit can differentiate between a quick fall in the voltage of the battery from a slow fall in the voltage of the battery, and output voltage signals to the voltage detector; and the voltage sensor can receive voltage signals outputted by the declining voltage integrating circuit, to compare the voltage signals with a pre-defined voltage level, and to ou
    Type: Application
    Filed: May 12, 2004
    Publication date: November 18, 2004
    Applicant: Kare Hong Kong Limited
    Inventor: Ka Yue Lo