Patents by Inventor Kent E. Van Allen

Kent E. Van Allen 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).

  • Stud welding system
    Patent number: 4988842
    Abstract: A stud welding system wherein welding is prevented unless the armature is located within an acceptable displacement window. A D.C. signal representative of armature position is generated by connecting differential amplifier across the coil and applying a constant voltage across the coil. The output of the amplifier is converted to a D.C. signal which is received by window comparator which will enable welding only when the armature is properly located.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: January 29, 1991
    Assignee: Emhart Inc.
    Inventor: Kent E. Van Allen