Patents by Inventor Man Leung Thomas Liu

Man Leung Thomas Liu 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: 11060324
    Abstract: A bag lock and its unlocking method, a first limiting slot is provided at a lock hook. The lock body comprises a lock bolt assembly and a rotating block, the rotating block has a locked state and an unlocked state; when the rotating block is in the unlocked state, the torsion spring provides a twisting force to disengage the first limiting slot from the lock bolt assembly, so that one end of the lock hook opposite to the torsion spring is unlocked from the lock hole to unlock the bag lock; when the rotating block is in the locked state, the rotating block limits a position of the lock bolt assembly so that the lock bolt assembly is kept to be locked inside the first limiting slot, thereby the end of the lock hook opposite to the torsion spring is fixed in the lock hole to lock the bag lock.
    Type: Grant
    Filed: February 8, 2018
    Date of Patent: July 13, 2021
    Assignee: DONGGUAN QINGXI KWONG WAH LOCK MFY. CO. LTD.
    Inventor: Man Leung Thomas Liu
  • Patent number: 11028618
    Abstract: An electronic padlock comprising a lock body, a locking hook moveably connected to the lock body, and an unlocking assembly, a locking mechanism, and a mechanical unlocking system and an electronic unlocking system which are provided in the lock body. One end of the mechanical unlocking system and one end of the electronic unlocking system are movably connected to the unlocking assembly to drive the unlocking assembly to perform position conversion between a first position and a second position, respectively; a locking mechanism is defined at the unlocking assembly, when the unlocking assembly is in the first position, the locking mechanism limits a position of the locking hook, the electronic padlock is in a locked state; when the unlocking assembly is in the second position, the locking mechanism is disengaged inwardly from the locking hook so that the locking hook can be pulled out to unlock the electronic padlock.
    Type: Grant
    Filed: April 18, 2018
    Date of Patent: June 8, 2021
    Assignee: DONGGUAN QINGXI KWONG WAH LOCK MFY. CO. LTD.
    Inventor: Man Leung Thomas Liu
  • Publication number: 20210156172
    Abstract: An electronic padlock comprising a lock body, a locking hook moveably connected to the lock body, and an unlocking assembly, a locking mechanism, and a mechanical unlocking system and an electronic unlocking system which are provided in the lock body. One end of the mechanical unlocking system and one end of the electronic unlocking system are movably connected to the unlocking assembly to drive the unlocking assembly to perform position conversion between a first position and a second position, respectively; a locking mechanism is defined at the unlocking assembly, when the unlocking assembly is in the first position, the locking mechanism limits a position of the locking hook, the electronic padlock is in a locked state; when the unlocking assembly is in the second position, the locking mechanism is disengaged inwardly from the locking hook so that the locking hook can be pulled out to unlock the electronic padlock.
    Type: Application
    Filed: April 18, 2018
    Publication date: May 27, 2021
    Inventor: Man Leung Thomas Liu
  • Publication number: 20200347646
    Abstract: A bag lock and its unlocking method, a first limiting slot is provided at a lock hook. The lock body comprises a lock bolt assembly and a rotating block, the rotating block has a locked state and an unlocked state; when the rotating block is in the unlocked state, the torsion spring provides a twisting force to disengage the first limiting slot from the lock bolt assembly, so that one end of the lock hook opposite to the torsion spring is unlocked from the lock hole to unlock the bag lock; when the rotating block is in the locked state, the rotating block limits a position of the lock bolt assembly so that the lock bolt assembly is kept to be locked inside the first limiting slot, thereby the end of the lock hook opposite to the torsion spring is fixed in the lock hole to lock the bag lock.
    Type: Application
    Filed: February 8, 2018
    Publication date: November 5, 2020
    Inventor: Man Leung Thomas Liu
  • Publication number: 20090056396
    Abstract: An anti-theft pin tumbler lock includes a lock core and a lock body having a bore and at least one first bore. The lock core includes a keyway mounted therein, and one second bore formed therein and aligned with at least one first bore. One spring, one pin and one tumbler are sequentially received in the first and second bores and blocked using one plug. At least one second bore is configured in a stepped form, in which a diameter of one end is larger than that of another one, and the tumbler is configured in a corresponding form, in which the relative large diameter end thereof lies in the larger diameter second bore, while the relative small diameter end lies in the smaller diameter bore. An anti-bump space between the smaller diameter end and the end of the second bore adjacent to keyway is created.
    Type: Application
    Filed: October 24, 2007
    Publication date: March 5, 2009
    Inventor: Man Leung Thomas Liu
  • Patent number: D897819
    Type: Grant
    Filed: November 2, 2018
    Date of Patent: October 6, 2020
    Assignee: DONGGUAN QINGXI KWONG WAH LOCK MFY. CO. LTD.
    Inventor: Man Leung Thomas Liu
  • Patent number: D899892
    Type: Grant
    Filed: March 5, 2019
    Date of Patent: October 27, 2020
    Assignee: DONGGUAN QINXI KWONG WAH LOCK MFY. CO. LTD.
    Inventor: Man Leung Thomas Liu
  • Patent number: D899893
    Type: Grant
    Filed: July 12, 2019
    Date of Patent: October 27, 2020
    Assignee: DONGGUAN QINGXI KWONG WAH LOCK MFY. CO. LTD.
    Inventor: Man Leung Thomas Liu