Patents by Inventor Lawrence F. Graham

Lawrence F. Graham 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: 5058453
    Abstract: A damper of vibrations of the viscous fluid type has a two-piece housing of which a plate is formed by a spinforming process. The formed plate has a plurality of internal walls of which at least a portion of the walls are usable as bearing surfaces after being spinformed and require no further machining thereof. The damper includes a plurality of individual bearings for radially and axially positioning a rotatable weight within the housing to form preselected spaces between the housing and the weight. An annular supply chamber and the preselected spaces have a viscous fluid disposed therein to provide a damping medium between the rotatable weight and the housing.
    Type: Grant
    Filed: May 5, 1989
    Date of Patent: October 22, 1991
    Assignee: Caterpillar Inc.
    Inventors: Lawrence F. Graham, Victor E. Swanson