Patents by Inventor M. Duane Oblander

M. Duane Oblander 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).

  • Method of manufacturing a polyurethane wear ring
    Patent number: 5494633
    Abstract: A method of manufacturing a novel liquid cast urethane rubber object that exhibits dimensional stability when subjected to temperature fluctuations including the steps of casting a liquid urethane polymer with curing agent in a heated mold and then subjecting the cast polyurethane part to compression in a second mold while heating (typically above 170.degree. F. and preferably 212.degree. F.) followed by cooling (typically below 40.degree. F. and preferably 32.degree. F.), thus inducing a low temperature set in the final cured product. Such a method is useful to mold a polyurethane object (e.g., a wear ring for marine jet pumps and the like) to exacting tolerances without machining.
    Type: Grant
    Filed: April 1, 1994
    Date of Patent: February 27, 1996
    Inventors: M. Duane Oblander, Gregory F. Menges
  • Method of molding a polyurethane wear ring
    Patent number: 5324560
    Abstract: A method of manufacturing a novel liquid cast urethane rubber object that exhibits dimensional stability when subjected to temperature fluctuations comprising the steps of casting a liquid urethane polymer with curing agent in a heated mold and then subjecting the cast polyurethane part to compression in a second mold while heating (typically above 17.degree. F. and preferably 212.degree. F.) followed by cooling (typically below 40.degree. F. and preferably 32.degree. F.), thus inducing a low temperature set in the final cured product. Such a method is useful to mold a polyurethane object (e.g., a wear ring for marine jet pumps and the like) to exacting tolerances without machining.
    Type: Grant
    Filed: August 29, 1988
    Date of Patent: June 28, 1994
    Inventors: M. Duane Oblander, Gregory F. Menges