Patents by Inventor Roy Wall

Roy Wall 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: 7934743
    Abstract: An apparatus for facilitating trailer towing is provided comprising a steer axle fixed to a rigid frame by means of a suspension, a selectably adjustable hitch, for receiving a trailer tongue, mounted on the frame and positioned above and forward of the steer axle, a vertically displacing articulated and spring centered tongue support fixed to the front of the frame, the vertically displacing articulated tongue support capable of absorbing vertical displacement between the apparatus and a towing vehicle while maintaining the a forward disposed tongue mount in a horizontal position. The apparatus forms a towing apparatus providing improved stability, traction, control, and maneuverability facilitating wheel traction at speed, through turns and over irregular or undulating terrain. The apparatus is particularly suitable for use in combination with light weight prime mover vehicles.
    Type: Grant
    Filed: February 10, 2009
    Date of Patent: May 3, 2011
    Inventors: Roy Wall, Tonja Wall
  • Patent number: 7878575
    Abstract: A livestock trailer with sliding safety door having a trailer with a two section sliding door mounted at the rear and hung from a slidable rail assembly at the top and retained by a guide at the bottom wherein the guides are steel reinforced. The sliding safety door, being secured at top and bottom, facilitates the loading and unloading of livestock by minimizing injuries sustained from kicking the door and eliminating injuries sustained when utilizing prior art swinging door type livestock trailers. The sliding door mechanism further eliminates the need to reposition the trailer while docking to a loading ramp so as to provide clearance to operate the door.
    Type: Grant
    Filed: February 11, 2009
    Date of Patent: February 1, 2011
    Inventors: Roy Wall, Tonja Wall