Patents by Inventor John Frus

John Frus 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).

  • Patent number: 5168187
    Abstract: An axial pole stepping motor having a stator assembly on one or both sides of a disc-shaped rotor and including a plurality of teeth extending parallel to the rotational axis of the motor's drive shaft with the teeth arranged into at least two groups and evenly spaced within each of the two groups such that the teeth of each group may be axially aligned with the north-south poles of the permanent magnets evenly spaced about the circumference of the rotor. The two groups of teeth are circumferentially offset from each other such that the teeth of both groups cannot be simultaneously aligned with the north-south poles of the rotor. The circumferential offsetting of the two groups defines a stepping angle for the rotation of the motor shaft. A continuous skein winding woven in a labyrinth pattern between and among the teeth of each group transforms the teeth into salient poles. The windings may be energized in several modes.
    Type: Grant
    Filed: February 20, 1991
    Date of Patent: December 1, 1992
    Assignee: Dana Corporation, Warner Electric Brake & Clutch Division
    Inventors: John S. Baer, William R. Coon, John Frus