Patents by Inventor Douglas A. Markelonis

Douglas A. Markelonis 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).

  • Adjustable center pole
    Patent number: 9852834
    Abstract: An adjustable solenoid assembly with an adjustable threaded pole having an interference fit section to be used with a complementary threaded receiver (e.g., the bore of the top plate) with an interference fit section. The adjustable threaded sections are used to pull or push the interference fit sections together and allow for precise locating of the interference fit sections and adjustment. The threaded pole may be used to set and maintain a precision working air gap between the pole piece and the plunger of the electromagnetic solenoid assembly. The interference fit holds the pole piece into location while still allowing the solenoid to be adjustable without a loss in flux density.
    Type: Grant
    Filed: December 31, 2014
    Date of Patent: December 26, 2017
    Assignee: Parker-Hannifin Corporation
    Inventors: Jesse Thompson, Douglas A. Markelonis
  • ADJUSTABLE CENTER POLE
    Publication number: 20150187482
    Abstract: An adjustable solenoid assembly with an adjustable threaded pole having an interference fit section to be used with a complementary threaded receiver (e.g., the bore of the top plate) with an interference fit section. The adjustable threaded sections are used to pull or push the interference fit sections together and allow for precise locating of the interference fit sections and adjustment. The threaded pole may be used to set and maintain a precision working air gap between the pole piece and the plunger of the electromagnetic solenoid assembly. The interference fit holds the pole piece into location while still allowing the solenoid to be adjustable without a loss in flux density.
    Type: Application
    Filed: December 31, 2014
    Publication date: July 2, 2015
    Inventors: Jesse Thompson, Douglas A. Markelonis