Patents by Inventor Mattewos Tefferi

Mattewos Tefferi 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).

  • Publication number: 20240429006
    Abstract: A switchgear system includes an enclosure made of dielectric material and containing atmospheric air and a plurality of switch assemblies within the enclosure arranged in a plurality of rows. Each switch assembly is electrically connected to at least one other switch assembly in another row and includes a loadbreak module, a bushing, and a disconnect switch. The loadbreak module includes a fixed contact, a movable contact, and a pair of opposed line terminals electrically coupled to the movable contact. The bushing includes a load terminal, and the disconnect switch is positioned between the load terminal and the fixed contact to selectively break or establish an electrical pathway therebetween. Each disconnect switch of each switch assembly and each movable contact of each switch assembly is coupled with each other disconnect switch and each other movable contact, respectively, of the switch assemblies in the same row to be operable in unison.
    Type: Application
    Filed: September 9, 2024
    Publication date: December 26, 2024
    Inventors: William Tesch, Andres Laso, Nenad Uzelac, Mattewos Tefferi
  • Patent number: 12087523
    Abstract: A switchgear system operable at voltages up to 27 kV includes an enclosure containing atmospheric air and a loadbreak module disposed within the enclosure. The loadbreak module includes a loadbreak module housing made of a solid dielectric material, a vacuum interrupter enclosed within the loadbreak module housing and having a fixed contact and a movable contact, and an interchange electrically connected to the movable contact. The vacuum interrupter is operable to selectively break or establish an electrical pathway between the interchange and a terminal in response to movement of the movable contact relative to the fixed contact. The switchgear system further includes a bushing coupled to the enclosure and a disconnect switch electrically connected in series between the loadbreak module and the bushing. The disconnect switch includes a disconnect switch housing made of a solid dielectric material.
    Type: Grant
    Filed: December 6, 2021
    Date of Patent: September 10, 2024
    Assignee: G & W ELECTRIC COMPANY
    Inventors: William Tesch, Andres Laso, Nenad Uzelac, Mattewos Tefferi
  • Publication number: 20220181105
    Abstract: A switchgear system operable at voltages up to 27 kV includes an enclosure containing atmospheric air and a loadbreak module disposed within the enclosure. The loadbreak module includes a loadbreak module housing made of a solid dielectric material, a vacuum interrupter enclosed within the loadbreak module housing and having a fixed contact and a movable contact, and an interchange electrically connected to the movable contact. The vacuum interrupter is operable to selectively break or establish an electrical pathway between the interchange and a terminal in response to movement of the movable contact relative to the fixed contact. The switchgear system further includes a bushing coupled to the enclosure and a disconnect switch electrically connected in series between the loadbreak module and the bushing. The disconnect switch includes a disconnect switch housing made of a solid dielectric material.
    Type: Application
    Filed: December 6, 2021
    Publication date: June 9, 2022
    Inventors: William Tesch, Andres Laso, Nenad Uzelac, Mattewos Tefferi