Patents by Inventor Eckerhard Stroetgen

Eckerhard Stroetgen 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).

  • Series motor, in particular universal motor with brake device
    Patent number: 5552686
    Abstract: A series motor has a braking device, a stator having a field winding and a pole shoe plate pack, the pole shoe plate pack of the stator having field coils and also having a further element inducing a magnetic field, a rotatable armature, and an element for influencing a braking operation of the field winding.
    Type: Grant
    Filed: September 6, 1994
    Date of Patent: September 3, 1996
    Assignee: Robert Bosch GmbH
    Inventors: Wolfgang Schmid, Werner Rieker, Eckerhard Stroetgen, Csaba Kreiter, Ottmar Seel
  • Hand machine tool
    Patent number: 5311089
    Abstract: A hand machine tool has an electric motor, a radial fan driven by the electric motor and having an aspirating region and a stationary pre-spin grate located in the aspirating region of the radial fan directly upstream the radial fan as considered in an air flow direction and formed so that a supply air to the radial fan is deviated against a rotary direction of the radial fan.
    Type: Grant
    Filed: April 22, 1993
    Date of Patent: May 10, 1994
    Assignee: Robert Bosch GmbH
    Inventors: Eckerhard Stroetgen, Eberhard Prahst