Patents by Inventor Stephen R. KEMPF

Stephen R. KEMPF 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).

  • Coined drawbars for drawbar assemblies
    Patent number: 11473639
    Abstract: A drawbar assembly having a first continuous drawbar having an open end, a closed end, and an elongate body extending therebetween along an axis, and a spring anchor formed at the open end; a second continuous drawbar having an open end, a closed end, and an elongate body extending therebetween along the axis, and a spring anchor formed at the open end; the first and second drawbars oriented with respect to each other such that at least a portion of each elongate body overlaps with the other along the axis and the open end of one drawbar is proximate the closed end of the other; and a compression coil spring positioned over the overlapping elongate body portions and secured at each end by a respective spring anchor; wherein a region of at least one closed end is coined.
    Type: Grant
    Filed: September 4, 2019
    Date of Patent: October 18, 2022
    Assignee: LEE SPRING COMPANY LLC
    Inventors: Albert G. Mangels, Billy Burier, Valentin Fridmanovich, Christopher Wisniewski, Stephen R. Kempf
  • Coined Drawbars for Drawbar Assemblies
    Publication number: 20210324931
    Abstract: A drawbar assembly having a first continuous drawbar having an open end, a closed end, and an elongate body extending therebetween along an axis, and a spring anchor formed at the open end; a second continuous drawbar having an open end, a closed end, and an elongate body extending therebetween along the axis, and a spring anchor formed at the open end; the first and second drawbars oriented with respect to each other such that at least a portion of each elongate body overlaps with the other along the axis and the open end of one drawbar is proximate the closed end of the other; and a compression coil spring positioned over the overlapping elongate body portions and secured at each end by a respective spring anchor; wherein a region of at least one closed end is coined.
    Type: Application
    Filed: September 4, 2019
    Publication date: October 21, 2021
    Inventors: Albert G. MANGELS, Billy BURIER, Valentin FRIDMANOVICH, Christopher WISNIEWSKI, Stephen R. KEMPF