Patents by Inventor Herbert C. Roberts

Herbert C. Roberts 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).

  • Metal bolt with a composite core for enhancement
    Patent number: 5292215
    Abstract: The improved metal matrix bolt has a metal shell having the bolt head, shank and threads thereon. The shell has a longitudinal space therein wherein a composite core of fibers is bonded. The fibers are divided into two groups: a longitudinal group and a spiral group. The spiral group wraps clockwise about the longitudinal group and is inclined at an angle of about 30.degree. to 45.degree. degrees from the axis of the bolt. The fibers are bonded within the space to the interior surface of the shell whereby when the bolt is torqued, the bolt has increased tensile strength and reduced thermal axial growth.
    Type: Grant
    Filed: October 7, 1992
    Date of Patent: March 8, 1994
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Herbert C. Roberts, III
  • Boat loading and unloading device for automotive vehicles
    Patent number: 4139110
    Abstract: This device consists primarily of a movable frame, mounted inside of a fixed frame on the top of a vehicle. The device includes two davit-like structures which connect to a rod having pulley and line means, which will enable the boat or other load to be handled easily by a single person.
    Type: Grant
    Filed: April 20, 1977
    Date of Patent: February 13, 1979
    Inventor: Herbert C. Roberts