Patents Examined by Greg Beehner
  • Multi-rate side bearing for a railway truck
    Patent number: 4434720
    Abstract: A multi-rate side bearing for a railway truck is provided. The side bearing comprises a base plate and an upper plate, with two resilient devices located between the base plate and the upper plate. The resilient devices usually are elastomeric pads of different compression rates and shear stiffness. Under unloaded car conditions, only one pad is in load supporting contact, but under loaded car conditions, both resilient devices contact the upper and base plates to provide load support and car body-truck motion damping.
    Type: Grant
    Filed: February 18, 1982
    Date of Patent: March 6, 1984
    Assignee: AMSTED Industries Incorporated
    Inventors: Harry W. Mulcahy, Horst T. Kaufhold