Patents by Inventor Robert N. Stewart

Robert N. Stewart 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: 5743659
    Abstract: A split bearing, a cage for a split or non-split bearing and a method of cutting a member of a split bearing is related in this disclosure. The split bearing has at least one component, such as the outer race, split, i.e., formed into at least two parts, each part defining two longitudinally extending surfaces which mate with a corresponding longitudinal surface of the adjacent part such that the mating surfaces define a helix in their longitudinal extent. The cage of the split or non-split bearing includes two annular parts that in assembly define a plurality of cavities each one adapted to receive a roller member of the bearing. Each of the two annular parts including at least two pieces joined together by a tongue and groove connection. The method of cutting a member of a split bearing involves cutting the member longitudinally such that the cut mating surfaces, define a helix in the longitudinal direction.
    Type: Grant
    Filed: January 30, 1997
    Date of Patent: April 28, 1998
    Assignee: Craft Bearing Company, Inc.
    Inventor: Robert N. Stewart
  • Patent number: 5630669
    Abstract: A split bearing, a cage for a split or non-split bearing and a method of cutting a member of a split bearing is related in this disclosure. The split bearing has at least one component, such as the outer race, split, i.e., formed into at least two parts, each part defining two longitudinally extending surfaces which mate with a corresponding longitudinal surface of the adjacent part such that the mating surfaces define a helix in their longitudinal extent. The cage of the split or non-split bearing includes two annular parts that in assembly define a plurality of cavities each one adapted to receive a roller member of the bearing. Each of the two annular parts including at least two pieces joined together by a tongue and groove connection. The method of cutting a member of a split bearing involves cutting the member longitudinally such that the cut mating surfaces, define a helix in the longitudinal direction.
    Type: Grant
    Filed: July 12, 1994
    Date of Patent: May 20, 1997
    Assignee: Craft Bearing Company, Inc.
    Inventor: Robert N. Stewart
  • Patent number: 4172902
    Abstract: A colorant from a natural source which produces a wide range of stable colors in food and beverages which have a pH range of 2.0 to about 8.0 is added to foods and beverages in effective proportion. The colorant is the anthocyanin from `Heavenly Blue` Morning Glory, peonidin 3-(dicaffeylsophoroside)-5-glucoside.
    Type: Grant
    Filed: May 26, 1978
    Date of Patent: October 30, 1979
    Assignee: The United States of America as represented by the Secretary of Agriculture
    Inventors: Samuel Asen, Robert N. Stewart, Karl H. Norris