Patents Represented by Attorney C. F. Shifley
  • Patent number: 4474217
    Abstract: Hose structure suitable for transport of highly abrasive media including at least two concentric tube layers of elastomeric material. The radially innermost tube layer material is of greater abrasion resistance than a tube layer radially outwardly thereof. A radially outer tube layer material is of greater resilience than that of the radially innermost tube layer. The tube layers may be made visually distinguishable, for example, by being of different colors, so as to serve as a wear indicator.
    Type: Grant
    Filed: August 11, 1982
    Date of Patent: October 2, 1984
    Assignee: The Goodyear Tire & Rubber Company
    Inventors: Ernest W. DeMarse, Karl K. Kluss, John M. Sawyer, Terry F. Allen