Patents by Inventor Ralph Schinke

Ralph Schinke 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 and apparatus for retarding oil leakage in a sewing machine
    Patent number: 4522136
    Abstract: The atmospheric pressure of lubricant containing cavities, from which leakage occurs, is lowered to a point below atmospheric pressure such that air from the environment is drawn thereinto. Since the air being drawn in occupies the passages through which lubricant leakage occurs, such leakage is effectively retarded.
    Type: Grant
    Filed: December 1, 1983
    Date of Patent: June 11, 1985
    Assignee: Union Special Corporation
    Inventors: James W. Wolff, James W. Ruedisueli, Ralph Schinke