Patents by Inventor Gerald M. Gilbertson

Gerald M. Gilbertson 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: 5308213
    Abstract: This invention relates to a ground level loading universal trailer comprising a U-shaped frame; a support bed being pivotally connected to either side and near the rear end thereof to the frame which is mounted upon two stub axles having wheels mounted thereupon; a pair of clevis-like members fixedly attached to the sides and near the forward end of the support bed to receive a portion of the frame to lock the support bed in a transport mode with locking pins; a tongue device having a first tongue extension member fixedly attached to and extending forward the frame and having a second tongue extension member hingedly attached near a central portion thereof to the outer end of the first tongue extension member; and a winch mechanism mounted upon an upright elongate support member fixedly attached to the second tongue extension member for lowering and raising the support bed without any part of the tongue device being disconnected and with ease and convenience for a lone user, in particular.
    Type: Grant
    Filed: June 21, 1993
    Date of Patent: May 3, 1994
    Inventor: Gerald M. Gilbertson