Patents Assigned to Steve L. Jantzen
  • Prestressed concrete cross tie having increased fatigue life
    Patent number: 4712735
    Abstract: In a prestressed concrete cross tie, a layer of steel reinforcements are located at or near the neutral axis of the cross tie section to minimize fatigue stress fluctuations. Deviation from the neutral axis is not great enough to cause stress fluctuations to exceed the endurance limit of the material. Because fatigue failure of prestressed concrete members is principally associated with reinforcement failure, increased fatigue life of the cross tie is achieved.
    Type: Grant
    Filed: February 6, 1986
    Date of Patent: December 15, 1987
    Assignee: Steve L. Jantzen
    Inventor: Steven L. Jantzen