Patents Examined by A. Henry
  • Device for guarding mispolarization of inductive loads
    Patent number: 6127745
    Abstract: A device for switching inductive loads includes a series circuit which is connected between positive and negative poles of voltage source and has a load and a switch associated with the load. A free-running diode is connected parallel to the load. A guard circuit for guarding against mispolarization of the voltage source has an electronic switch connected in series with the free-running diode. The electronic switch is made conducting through a charge pump triggered by an oscillator, given correct polarization of the voltage source.
    Type: Grant
    Filed: February 16, 1999
    Date of Patent: October 3, 2000
    Assignee: Siemens Aktiengesellschaft
    Inventor: Stephan Bolz