Patents by Inventor Lawrence W. Hanson

Lawrence W. Hanson 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).

  • Railroad freight car draft gear assembly
    Patent number: 8870002
    Abstract: A railcar draft gear assembly having an axially elongated spring assembly comprised of an axially stacked array of individual spring units and further including cooperating instrumentalities for maintaining the spring assembly generally axially aligned with a longitudinal axis of the railcar draft gear assembly during operation of the draft gear assembly while maintaining the individual spring units in generally aligned relation relative to each other.
    Type: Grant
    Filed: December 14, 2011
    Date of Patent: October 28, 2014
    Assignee: Miner Enterprises, Inc.
    Inventors: Donald E. Wilt, Keith A. Salis, Lawrence W. Hanson
  • Railroad freight car draft gear assembly
    Publication number: 20130153526
    Abstract: A railcar draft gear assembly having an axially elongated spring assembly comprised of an axially stacked array of individual spring units and further including cooperating instrumentalities for maintaining the spring assembly generally axially aligned with a longitudinal axis of the railcar draft gear assembly during operation of the draft gear assembly while maintaining the individual spring units in generally aligned relation relative to each other.
    Type: Application
    Filed: December 14, 2011
    Publication date: June 20, 2013
    Inventors: Donald E. Wilt, Keith A. Salis, Lawrence W. Hanson