Patents by Inventor Vincent C. McCalip

Vincent C. McCalip 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).

  • Trailer hitch assembly
    Patent number: 7527279
    Abstract: A trailer hitch assembly is used with a trailer having a plurality of wheels each rotatable about a horizontal axis and a vertical axis. The hitch assembly includes coupling elements on the trailer for fixedly engaging the trailer to a towing vehicle in a horizontal plane parallel to the ground surface during a rearward motion of the vehicle and the trailer and for pivotably linking the trailer to the vehicle in the horizontal plane during a forward motion of the vehicle and the trailer. A locking mechanism automatically preventing rotation of the wheels about the respective second axes during the forward motion of the trailer and the vehicle and for enabling rotation of the wheels about the respective second axes during the rearward motion of the trailer and the vehicle.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: May 5, 2009
    Inventor: Vincent C. McCalip
  • Trailer hitch assembly
    Patent number: 6991246
    Abstract: A trailer hitch assembly is used with a trailer having a plurality of wheels each rotatable about a horizontal axis and a vertical axis. The hitch assembly includes coupling elements on the trailer for fixedly engaging the trailer to a towing vehicle in a horizontal plane parallel to the ground surface during a rearward motion of the vehicle and the trailer and for pivotably linking the trailer to the vehicle in the horizontal plane during a forward motion of the vehicle and the trailer. A locking mechanism automatically preventing rotation of the wheels about the respective second axes during the forward motion of the trailer and the vehicle and for enabling rotation of the wheels about the respective second axes during the rearward motion of the trailer and the vehicle.
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: January 31, 2006
    Inventor: Vincent C. McCalip