Patents by Inventor Ray A. Keefer

Ray A. Keefer 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 diaphragm
    Patent number: 4599947
    Abstract: A railroad diaphragm comprising a mounting plate coupleable to the end face of a railroad car, a face plate and wear plate for contact to an adjacent diaphragm, and sheet material located therebetween. Sponge like material within the space between the mounting plate and sheet material at the upper section thereof, provides resilience to the diaphragm.
    Type: Grant
    Filed: September 30, 1985
    Date of Patent: July 15, 1986
    Assignee: The B. F. Goodrich Company
    Inventor: Ray A. Keefer