Patents by Inventor Eric James Hafenstein

Eric James Hafenstein 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).

  • CONTACT SWITCH COATING
    Publication number: 20220122784
    Abstract: Switch assemblies and switching methods are disclosed. In some embodiments, a switch assembly may include a first blade having a first contact within an enclosed cavity, and a second blade having a second contact within the enclosed cavity. The first and second contacts are operable to make or break contact with one another in response to a magnetic field. The switch assembly may further include a coating formed over each of the first and second contacts, the coating including a titanium layer, a second layer formed over the titanium layer, and a tungsten-copper layer formed over the second layer. In some embodiments, the second layer is copper or molybdenum.
    Type: Application
    Filed: December 23, 2021
    Publication date: April 21, 2022
    Applicant: Littelfuse, Inc.
    Inventors: Philip Warner Lees, Joshua James Koeppel, J. Anthony Spies, Eric James Hafenstein
  • Contact switch coating
    Patent number: 11309140
    Abstract: Switch assemblies and switching methods are disclosed. In some embodiments, a switch assembly may include a first blade having a first contact within an enclosed cavity, and a second blade having a second contact within the enclosed cavity. The first and second contacts are operable to make or break contact with one another in response to a magnetic field. The switch assembly may further include a coating formed over each of the first and second contacts, the coating including a titanium layer, a second layer formed over the titanium layer, and a tungsten-copper layer formed over the second layer. In some embodiments, the second layer is copper or molybdenum.
    Type: Grant
    Filed: January 4, 2019
    Date of Patent: April 19, 2022
    Assignee: Littelfuse, Inc.
    Inventors: Philip Warner Lees, Joshua James Koeppel, J. Anthony Spies, Eric James Hafenstein
  • CONTACT SWITCH COATING
    Publication number: 20200219670
    Abstract: Switch assemblies and switching methods are disclosed. In some embodiments, a switch assembly may include a first blade having a first contact within an enclosed cavity, and a second blade having a second contact within the enclosed cavity. The first and second contacts are operable to make or break contact with one another in response to a magnetic field. The switch assembly may further include a coating formed over each of the first and second contacts, the coating including a titanium layer, a second layer formed over the titanium layer, and a tungsten-copper layer formed over the second layer. In some embodiments, the second layer is copper or molybdenum.
    Type: Application
    Filed: January 4, 2019
    Publication date: July 9, 2020
    Applicant: Littelfuse, Inc.
    Inventors: Philip Warner Lees, Joshua James Koeppel, J. Anthony Spies, Eric James Hafenstein