Patents by Inventor Philip Thomas Callan

Philip Thomas Callan 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).

  • Publication number: 20030184045
    Abstract: A lift truck has a wheeled rear section to which is pivotally connected a wheeled front section, with one of the sections being drivable, in use. The front section, which has lifting forks, is pivoted to an extended length arm at the front of the rear section, to allow the front section to pivot relative the rear section, to at least one side thereof, by an angle substantially greater than 90°. Part of the rear section can be relieved to permit said pivoting.
    Type: Application
    Filed: March 25, 2003
    Publication date: October 2, 2003
    Inventor: Philip Thomas Callan
  • Publication number: 20030132038
    Abstract: A lift truck has front and rear sections pivotally connected for the front section to turn 90° to the rear section from the straight ahead state of the truck. The front and rear sections can each have a pair of wheels or one section can have a pair of wheels and the other section only a single wheel. All the wheels are drivable. In one aspect drive to a wheel is in proportion to the degree of articulation between the front and rear sections. In a second aspect drive to a wheel is controlled when said articulation exceeds a predetermined value, and in a third aspect a rear wheel or one or both of a pair of rear wheels can be undriven, i.e. freely rotatable in either direction of rotation.
    Type: Application
    Filed: January 14, 2003
    Publication date: July 17, 2003
    Inventors: Philip Thomas Callan, Peter Wooldridge