Patents by Inventor James R. Schaefer

James R. Schaefer 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).

  • Patent number: 4403813
    Abstract: A cage for a high speed anti-friction roller bearing having an improved design in which the openings therein have all four sides thereof formed of a convex configuration and join each other at concave corners of relatively large radii. By establishing an acceptable or initial roller skew angle based upon roller and guide rail design, the internal configuration of the cage is designed such that contact by the rollers at the corners of the cage will not occur until after wear between the rollers and the guide rails has developed to such an extent that the accptable skew angle of the rollers has been exceeded. Consequently, spalling or wear debris can be detected prior to roller-cage corner contact and probable catastrophic roller bearing failure can be prevented.
    Type: Grant
    Filed: October 14, 1981
    Date of Patent: September 13, 1983
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: James R. Schaefer
  • Patent number: 4384749
    Abstract: An improved reliability roller bearing having an outer ring; inner ring made up of three separable elements, that is, two guide rails and an inner raceway; a plurality of rollers interposed between the inner ring and the outer ring and a cage for supporting the rollers therebetween. Both guide rails entrap up to 60% of the roller diameter. In addition, the roller bearing incorporates therein a novel lubricant distribution system which is formed within the guide rails. Even distribution of lubricant is obtained by a centrifugally fed weir built into both guide rails.
    Type: Grant
    Filed: June 26, 1981
    Date of Patent: May 24, 1983
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: James R. Schaefer
  • Patent number: 4341296
    Abstract: The present invention provides apparatus for precisely distributing a liquid coolant or lubricant about the interior of a rotary machine. Distribution in known quantity is sought over a wide range of shaft speeds.In one embodiment the apparatus of the invention is employed to distribute oil in various quantities to bearings and splines within a clutch assembly. Lubricating oil is sprayed from a stationary nozzle into the interior of a rotating shaft. An insert at the interior of the shaft has a plurality of longitudinal splits which intercept and collect the oil in proximity to orifices in communication with bearings and splines to which oil distribution is desired.
    Type: Grant
    Filed: September 22, 1980
    Date of Patent: July 27, 1982
    Assignee: United Technologies Corporation
    Inventors: James R. Schaefer, Leland J. Radtke