Patents by Inventor Ronald G. Fredrickson

Ronald G. Fredrickson 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: 4372727
    Abstract: A multiple fold ramp tail for a trailer is described comprising a wheeled frame having rearward and forward ends with the forward end of the frame being suitable for connection to a prime mover such as a truck or the like. A multiple fold ramp tail is pivotally connected to the rearward end of the frame and comprises a main ramp portion, first stage ramp portion and a second stage ramp portion. The forward end of the main ramp portion is pivotally connected to the rearward end of the frame and the forward end of the first stage ramp portion is pivotally connected to the rearward end of the main ramp portion. The second stage ramp portion is pivotally connected at its forward end to the rearward end of the first stage ramp portion. The first and second stage ramp portions are normally in a stored position wherein they are folded upon themselves beneath the lower rearward end of the main ramp portion.
    Type: Grant
    Filed: March 30, 1981
    Date of Patent: February 8, 1983
    Assignee: Dakota Manufacturing Co., Inc.
    Inventors: Ronald G. Fredrickson, Joseph W. Bills, Jr.
  • Patent number: 4242022
    Abstract: A device for mounting D-rings on truck trailers having permanent side extensions is described which enables the D-rings to be positioned between adjacent side extensions. The truck trailer includes a pair of outer side frame members comprised of I-Beams which extend longitudinally along the length of the trailer. A plurality of side extension members are hingedly secured at their inner ends to the top flange of each of the I-Beams. A plurality of longitudinally spaced ring supports are secured to each of the I-Beams between adjacent side extension members. A D-ring is pivotally mounted on each of the supports and may be pivoted from a vertically disposed hanging position to an upwardly and inwardly extending position adapted to have cables, straps or the like secured thereto.
    Type: Grant
    Filed: April 23, 1979
    Date of Patent: December 30, 1980
    Inventor: Ronald G. Fredrickson