Patents by Inventor Young Hum JO

Young Hum JO 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).

  • Double safety device for quick coupler
    Patent number: 11421394
    Abstract: The present invention relates to a double safety device for a quick coupler, which, in a coupling process of a quick coupler for connecting a heavy equipment attachment and an excavator, automatically prevents unintentional separation between an attachment pin and a fixed hook, and enables a locking device to be automatically operated in association with a cylinder operation for slidably moving a hitch and elastic force of first and second compression springs.
    Type: Grant
    Filed: August 18, 2016
    Date of Patent: August 23, 2022
    Inventor: Young Hum Jo
  • DOUBLE SAFETY DEVICE FOR QUICK COUPLER
    Publication number: 20190177946
    Abstract: The present invention relates to a double safety device for a quick coupler, which, in a coupling process of a quick coupler for connecting a heavy equipment attachment and an excavator, automatically prevents unintentional separation between an attachment pin and a fixed hook, and enables a locking device to be automatically operated in association with a cylinder operation for slidably moving a hitch and elastic force of first and second compression springs.
    Type: Application
    Filed: August 18, 2016
    Publication date: June 13, 2019
    Applicant: DAEMO ENGINEERING CO., LTD.
    Inventor: Young Hum JO