Patents by Inventor Johan Horman

Johan Horman 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).

  • Electronic circuit breaker and a method of providing protection switching
    Patent number: 8717032
    Abstract: A protection switching system in a power supply distribution system, comprises at least one protection switch (25) comprising a controllable semiconductor arranged to conduct current through the power supply line in a normal mode, a control unit (27) arranged to place the at least one protection switch in a test mode in which the current is reduced compared to the normal mode, registration means (28, 29) for registering a test mode value of at least one electrical characteristic in the power supply line that will be affected when the test mode is applied, a monitoring unit (30; 47) arranged to evaluate the at least one electrical characteristic and determine, based on the evaluation, whether or not an action should be taken. If a malfunction is detected an alarm is issued to indicate to service personnel that the protection switch should be replaced.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: May 6, 2014
    Assignee: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Johan Horman, Hans Kramer
  • Electronic Circuit Breaker and a Method of Providing Protection Switching
    Publication number: 20110279985
    Abstract: A protection switching system in a power supply distribution system, comprises at least one protection switch (25) comprising a controllable semiconductor arranged to conduct current through the power supply line in a normal mode, a control unit (27) arranged to place the at least one protection switch in a test mode in which the current is reduced compared to the normal mode, registration means (28, 29) for registering a test mode value of at least one electrical characteristic in the power supply line that will be affected when the test mode is applied, a monitoring unit (30; 47) arranged to evaluate the at least one electrical characteristic and determine, based on the evaluation, whether or not an action should be taken. If a malfunction is detected an alarm is issued to indicate to service personnel that the protection switch should be replaced.
    Type: Application
    Filed: January 28, 2009
    Publication date: November 17, 2011
    Applicant: Telefonaktiebolaget L M Ericsson (publ)
    Inventors: Johan Horman, Hans Kramer
  • Power supply unit
    Patent number: D357901
    Type: Grant
    Filed: March 25, 1994
    Date of Patent: May 2, 1995
    Assignee: Telefonaktiebolaget LM Ericsson
    Inventor: Johan Horman