Patents by Inventor Heung-Sik Lee

Heung-Sik Lee 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: 7164996
    Abstract: A power breaking apparatus for prevention of electrical shock breaks AC power supplied to electrical structures such as traffic lights, streetlights etc. if a leakage voltage is detected over a preset voltage or the electrical structures are inundated, thereby preventing electrical shock from inundation or leakage voltage. A plurality of inundation sensor rods of inundation sensing unit sense inundation of the metal posts. A plurality of leakage voltage sensor rods of the leakage voltage sensor sense leakage voltage. A power break signal generation unit generates ground current if the inundation sensing unit senses inundation or the leakage voltage sensor senses leakage voltage over a preset voltage and shots AC power to the ground if a predetermined time lapses. A zero phase sequence current transformers (ZCTs) detect the ground current. A leakage zero phase detector controls wiring breaker and a magnetic switch to break AC power according as the ZCTs detect ground current.
    Type: Grant
    Filed: February 23, 2005
    Date of Patent: January 16, 2007
    Inventor: Heung-Sik Lee
  • Publication number: 20060052956
    Abstract: A power breaking apparatus for prevention of electrical shock breaks AC power supplied to electrical structures such as traffic lights, streetlights etc. if a leakage voltage is detected over a preset voltage or the electrical structures are inundated, thereby preventing electrical shock from inundation or leakage voltage. A plurality of inundation sensor rods of inundation sensing unit sense inundation of the metal posts. A plurality of leakage voltage sensor rods of the leakage voltage sensor sense leakage voltage. A power break signal generation unit generates ground current if the inundation sensing unit senses inundation or the leakage voltage sensor senses leakage voltage over a preset voltage and shots AC power to the ground if a predetermined time lapses. A zero phase sequence current transformers (ZCTs) detect the ground current. A leakage zero phase detector controls wiring breaker and a magnetic switch to break AC power according as the ZCTs detect ground current.
    Type: Application
    Filed: February 23, 2005
    Publication date: March 9, 2006
    Inventor: Heung-Sik Lee
  • Patent number: 5984696
    Abstract: The present invention relates, in general, to an improvement of a hybrid connector, and a right angle female member and male members therefor. A male member (11) comprises a projection pin (11a) formed to at one end and having a driver slot formed therein, and a flange (11b) and a screw hole (11c) formed at the other end, the flange having teeth It formed thereon. Also, the other male member (12) comprises a screw portion (12a) provided at one end lie and threadedly engaged with a screw hole (11c) of the male member (11), a projection pin (12b) provided at the other end and having a driver slot formed therein, and a flange (12c) provided between the screw portion (12a) and the projection pin (12b). A right angle female member (13) comprises a body portion, (13a) having six legs (13a.sub.1), a rectangular rod shaped body (13a.sub.2), and a plug portion receiving hole (13a.sub.3) formed through the body portion, and a cylindrical hollow plug portion (13b) having a first end (13b.sub.
    Type: Grant
    Filed: January 21, 1997
    Date of Patent: November 16, 1999
    Assignee: Berg Technology, Inc.
    Inventor: Heung-Sik Lee
  • Patent number: 5651695
    Abstract: A connector (9) for electrically connecting a cable (10) including a bundle of electric wires (13) to a printed circuit board where the connector includes a connector body (1), a housing (12) formed to support wires of the cable integrally with one another and capable of being coupled to the connector body. The connector body includes at least one pair of facing supports (4) provided at edges of the connector body and adapted to support the housing so as to prevent the cable from being easily separated from the connector body when external force or tension is applied where at least one support of the connector body has a hook (5) adapted to engage with an edge of the housing.
    Type: Grant
    Filed: April 19, 1996
    Date of Patent: July 29, 1997
    Assignee: Berg Technology, Inc.
    Inventors: Hyoung Ku Lee, Heung Sik Lee