Patents by Inventor Richard G. Johnson

Richard G. Johnson 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 of making a segmented externally finned heat exchanger tube
    Patent number: 4581800
    Abstract: A method of making a segmented externally finned tube with at least one fin free area for use in a heat exchanger. The method includes the steps of providing a tape of thermally conductive material with spaced reliefs along one longitudinal edge thereof and slitting the tape from that edge partially across its length between the reliefs. The slit portions of the tape are bent to form an angle with respect to the remainder of the tape which is then used to helically wrap a thermally conductive tube. The area of the reliefs provide fin free areas.
    Type: Grant
    Filed: August 16, 1984
    Date of Patent: April 15, 1986
    Assignee: Sundstrand Heat Transfer, Inc.
    Inventor: Richard G. Johnson