Patents by Inventor Coleman Duncan

Coleman Duncan 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).

  • Variable preload bearing apparatus
    Patent number: 5051005
    Abstract: An apparatus including a shaft, with a first and a second angular contact bearing axially disposed along the shaft to provide support for the shaft in a first and a second axial direction, respectively. The second axial direction is substantially opposite the first axial direction. A preload device exerts a preload force onto the angular contact bearings, which place the angular contact bearings into a maximum preload condition. An actuator device, acting in opposition to the preload device, reduces preload from the maximum preload condition to a desired preload condition. The preload device and the actuator device act directly through an axial displaceable race of the angular contact bearing, instead of through the rolling elements of the bearing.
    Type: Grant
    Filed: August 17, 1990
    Date of Patent: September 24, 1991
    Assignee: The Torrington Company
    Inventor: Coleman Duncan
  • Variable preload bearing apparatus
    Patent number: RE34310
    Abstract: An apparatus including a shaft, with a first and a second angular contact bearing axially disposed along the shaft to provide support for the shaft in a first and a second axial direction, respectively. The second axial direction is substantially opposite the first axial direction. A preload device exerts a preload force onto the angular contact bearings, which place the angular contact bearings into a maximum preload condition. An actuator device, acting in opposition to the preload device, reduces preload from the maximum preload condition to a desired preload condition. The preload device and the actuator device act directly through an axial displaceable race of the angular contact bearing, instead of through the rolling elements of the bearing.
    Type: Grant
    Filed: December 12, 1991
    Date of Patent: July 13, 1993
    Assignee: The Torrington Company
    Inventor: Coleman Duncan