Patents by Inventor Thomas A. Sumrak

Thomas A. Sumrak 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).

  • Dynamic flow calibration of a fuel injector by selective diversion of magnetic flux from the working gap
    Patent number: 5241858
    Abstract: An electromagnetically operated fuel injector has a dynamic flow calibration mechanism in which a control rod that extends between and enters holes in both the stator and the armature is selectively positioned to divert some of the magnetic flux from the axial working gap between the stator and the armature such that the diverted magnetic flux passes through the control rod directly between the stator and the armature without passing through the working gap. A non-magnetic tube is disposed between the control rod and the stator and armature holes. The portion of that tube which is within the stator hole is joined to the stator while the portion which is within the armature hole provides guidance for the armature. In a bottom-feed version of fuel injector the tube also serves to prevent fuel within the injector from wetting the control rod.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: September 7, 1993
    Assignee: Siemens Automotive L.P.
    Inventors: David P. Wieczorek, Thomas A. Sumrak