Patents by Inventor Chang-Do Park

Chang-Do Park 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).

  • Patent number: 7160346
    Abstract: The present invention relates to a dust and dirt collecting unit for a vacuum cleaner capable of simultaneously performing a primary cyclonic dust collection and a secondary filter dust collection. According to the present invention, there is provided a dust and dirt collecting unit for a vacuum cleaner, which is mounted to one side of a main body of the vacuum cleaner to filter sucked air containing foreign substances.
    Type: Grant
    Filed: March 19, 2003
    Date of Patent: January 9, 2007
    Assignee: LG Electronics, Inc.
    Inventor: Chang-Do Park
  • Patent number: 7051401
    Abstract: A suction nozzle for a vacuum cleaner is provided which includes a built in accessory tool. The suction nozzle includes a main body with an inlet which contacts the cleaning surface, and a connection portion which connects the main body of the nozzle to the vacuum cleaner. The nozzle also includes an accessory tool which communicates with the main body of the suction nozzle through a connection hose, and which, when extended, makes use of the suction force flowing through the main body of the suction nozzle. When not in use, the accessory tool is secured to the main body of the suction nozzle. In this manner, smaller, more narrow areas may be cleaned without first having to separate the suction nozzle from the vacuum cleaner in order to use an accessory tool.
    Type: Grant
    Filed: February 21, 2003
    Date of Patent: May 30, 2006
    Assignee: LG Electronics Inc.
    Inventor: Chang-Do Park
  • Publication number: 20040093684
    Abstract: The present invention relates to a dust and dirt collecting unit for a vacuum cleaner capable of simultaneously performing a primary cyclonic dust collection and a secondary filter dust collection. According to the present invention, there is provided a dust and dirt collecting unit for a vacuum cleaner, which is mounted to one side of a main body of the vacuum cleaner to filter sucked air containing foreign substances.
    Type: Application
    Filed: March 19, 2003
    Publication date: May 20, 2004
    Applicant: LG Electronics Inc.
    Inventor: Chang-Do Park
  • Publication number: 20040078922
    Abstract: The present invention relates to a suction nozzle for a vacuum cleaner for sucking air containing foreign substances. The suction nozzle of the present invention comprises a main body 100 with an inlet for sucking the air containing the foreign substances; a connection portion 110 formed at a rear surface of the main body of the suction nozzle for guiding the sucked air to a main body of the vacuum cleaner; an accessory tool 200 that is formed to be smaller than the main body of the suction nozzle and has an inlet for sucking the air containing the foreign substances; and a connection hose for allowing the accessory tool 200 to communicate with the interior of the main body of the suction nozzle. The main body 100 of the suction nozzle performs cleaning of relatively wide floors and the accessory tool 200 performs cleaning of narrow places such as corners of stairs.
    Type: Application
    Filed: February 21, 2003
    Publication date: April 29, 2004
    Applicant: LG Electronics Inc.
    Inventor: Chang-Do Park