Patents by Inventor Ralph Burckhardt

Ralph Burckhardt 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).

  • Switching device
    Patent number: 8049584
    Abstract: A switching device having a magnetic release includes a yoke having a U-shaped first section that includes a first limb having an opening in the form of a slot open towards a free end of the first limb, a second limb disposed parallel to the first limb, and a web connecting the first and second limbs. The switching device also includes a coil including a coil former, a coil winding and an armature disposed between the first and second limbs, wherein the coil is insertable into the slot towards the web and the armature extends through the slot. A restraint spring is connected at a free end of the armature and disposed outside the first limb.
    Type: Grant
    Filed: February 27, 2009
    Date of Patent: November 1, 2011
    Assignee: ABB AG
    Inventors: Ralf Mueller, Frank Hustert, Ralph Burckhardt, Guido Niewoehner, Hans-Peter Weyand
  • SWITCHING DEVICE
    Publication number: 20090219662
    Abstract: A switching device having a magnetic release includes a yoke having a U-shaped first section that includes a first limb having an opening in the form of a slot open towards a free end of the first limb, a second limb disposed parallel to the first limb, and a web connecting the first and second limbs. The switching device also includes a coil including a coil former, a coil winding and an armature disposed between the first and second limbs, wherein the coil is insertable into the slot towards the web and the armature extends through the slot. A restraint spring is connected at a free end of the armature and disposed outside the first limb.
    Type: Application
    Filed: February 27, 2009
    Publication date: September 3, 2009
    Applicant: ABB AG
    Inventors: Ralf Mueller, Frank Hustert, Ralph Burckhardt, Guido Niewoehner, Hans-Peter Weyand