Patents by Inventor Donald E. Wilt

Donald E. Wilt 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 car energy absorption apparatus
    Patent number: 6792871
    Abstract: A railroad car energy absorption apparatus is disclosed. The railroad car energy absorption apparatus includes a spring assembly having an elastomer spring element arranged in operable combination with structure for inhibiting localized heat deterioration of the elastomer spring element.
    Type: Grant
    Filed: November 7, 2002
    Date of Patent: September 21, 2004
    Assignee: Miner Enterprises, Inc.
    Inventors: William P. O'Donnell, Michael D. VanMaldegiam, Erik D. Jensen, Donald E. Wilt, Michael S. Dillon
  • RAILCAR DRAFT GEAR HOUSING
    Publication number: 20040173555
    Abstract: A railcar draft gear housing is disclosed. The railcar draft gear housing is formed from an austempered ductile iron casting and includes an open end, a closed end, and wall structure axially extending between the housing's ends. The wall structure of the housing defines an axial section between and spaced from the ends. The axial section of the wall structure is configured to withstand impact energy imparted to the housing in excess of 81,000 inch pounds while retaining and exhibiting substantially linear elasticity wherein the resultant ratio of stress to energy input remains substantially constant thereby allowing for flexible distortion of the housing in a manner promoting enhanced energy damping characteristics.
    Type: Application
    Filed: March 4, 2003
    Publication date: September 9, 2004
    Inventors: Donald E. Wilt, David G. Anderson, Andrew W. Withall
  • Railroad car energy absorption apparatus
    Publication number: 20040129170
    Abstract: A railroad car energy absorption apparatus is disclosed. The railroad car energy absorption apparatus includes a spring assembly having an elastomer spring element arranged in operable combination with structure for inhibiting localized heat deterioration of the elastomer spring element.
    Type: Application
    Filed: December 18, 2003
    Publication date: July 8, 2004
    Inventors: William P. O'Donnell, Michael D. VanMaldegiam, Erik D. Jensen, Donald E. Wilt, Michael S. Dillon
  • Railroad car energy absorption apparatus
    Publication number: 20040089193
    Abstract: A railroad car energy absorption apparatus is disclosed. The railroad car energy absorption apparatus includes a spring assembly having an elastomer spring element arranged in operable combination with structure for inhibiting localized heat deterioration of the elastomer spring element.
    Type: Application
    Filed: November 7, 2002
    Publication date: May 13, 2004
    Inventors: William P. O'Donnell, Michael D. VanMaldegiam, Erik D. Jensen, Donald E. Wilt, Michael S. Dillon