Patents by Inventor Ralph L. Roberson

Ralph L. Roberson 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: 5236051
    Abstract: An agricultural implement for automatically taking up plastic sheeting and drip tape onto cylindrical drums. In the preferred embodiment, the device is designed to be mounted onto the back of a tractor or the like by means of a three point hitch. The device includes a frame having a first take-up means for receiving the plastic sheeting, a drive means connected to a first cylindrical drum and powered by the tractor, and a by-pass valve located between the drive means and the tractor for controlling the speed of the first take-up means. The first take-up means includes a spiral roller for preventing the plastic sheeting from bunching up. The present invention also includes a second take-up means for receiving the drip tape onto a second cylindrical drum. The second take-up means is preferably powered off of the first drive means. A control means is located between the second take-up means and the drive means for controlling the speed at which the drip tape roll is rotated.
    Type: Grant
    Filed: January 16, 1992
    Date of Patent: August 17, 1993
    Assignees: Alan G. Sawyer, Ralph L. Roberson
    Inventors: Alan G. Sawyer, Ralph L. Roberson