Patents by Inventor Dela Salah-Eldin Sayoumi

Dela Salah-Eldin Sayoumi 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).

  • Arc suppression circuit using a semi-conductor switch
    Patent number: 7697247
    Abstract: An arc suppression circuit in a protection relay having trip contacts is used to turn off a battery-powered solenoid and trip an AC power circuit breaker. The arc suppression circuit uses a switch-control circuit to control the turning off of a semi-conductor switch so that the semi-conductor switch provides a current path around the trip contacts, and is carrying all, or substantially all, of the load current, before the trip contacts are opened. When the trip contacts begin to open, the switch-control circuit holds the semi-conductor switch on for a sufficient time to prevent an arc from becoming established before turning the semi-conductor switch off. In a second embodiment, the arc suppression circuit provides a second switch-control circuit. This second switch-control circuit is configured to accept control signals from a microprocessor within a protection relay.
    Type: Grant
    Filed: November 10, 2006
    Date of Patent: April 13, 2010
    Assignee: ABB Technology AG
    Inventors: Mohamed Maharsi, Douglas A. Voda, Mark C. Glacobbe, Dela Salah-Eldin Sayoumi, Douglas A. Wood
  • Arc suppression circuit using a semi-conductor switch
    Publication number: 20080112097
    Abstract: An arc suppression circuit in a protection relay having trip contacts is used to turn off a battery-powered solenoid and trip an AC power circuit breaker. The arc suppression circuit uses a switch-control circuit to control the turning off of a semi-conductor switch so that the semi-conductor switch provides a current path around the trip contacts, and is carrying all, or substantially all, of the load current, before the trip contacts are opened. When the trip contacts begin to open, the switch-control circuit holds the semi-conductor switch on for a sufficient time to prevent an arc from becoming established before turning the semi-conductor switch off. In a second embodiment, the arc suppression circuit provides a second switch-control circuit. This second switch-control circuit is configured to accept control signals from a microprocessor within a protection relay.
    Type: Application
    Filed: November 10, 2006
    Publication date: May 15, 2008
    Inventors: Mohamed Maharsi, Douglas A. Voda, Mark C. Glacobbe, Dela Salah-Eldin Sayoumi, Douglas A. Wood