Patents by Inventor Mark Keen

Mark Keen 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: 20160375920
    Abstract: A powered pallet truck with a selectable effective reduced turning radius, and an intermediate roller assembly for mounting on the powered pallet truck, are provided. The intermediate roller assembly can include a base, a linear actuator pivotably connected at a base end to the base, a linkage pivotably connected to the base, and at least one roller having an axis pivotably connected to an actuating end of the linear actuator and to the linkage, the at least one roller thus being movable between a retracted and an engagement position. The assembly can be mounted to the underside of a pallet truck fork having a load wheel. A turning radius effectively defined by a drive wheel of the pallet truck and the intermediate roller, or a turning radius effectively defined by the drive wheel and the load wheel, can be selected.
    Type: Application
    Filed: September 7, 2016
    Publication date: December 29, 2016
    Inventors: Mark Keen, Michael Novak, Thomas Ryder
  • Patent number: 9458001
    Abstract: A powered pallet truck with a selectable effective reduced turning radius, and an intermediate roller assembly for mounting on the powered pallet truck, are provided. The intermediate roller assembly can include a base, a linear actuator pivotably connected at a base end to the base, a linkage pivotably connected to the base, and at least one roller having an axis pivotably connected to an actuating end of the linear actuator and to the linkage, the at least one roller thus being movable between a retracted and an engagement position. The assembly can be mounted to the underside of a pallet truck fork having a load wheel. A turning radius effectively defined by a drive wheel of the pallet truck and the intermediate roller, or a turning radius effectively defined by the drive wheel and the load wheel, can be selected.
    Type: Grant
    Filed: December 19, 2013
    Date of Patent: October 4, 2016
    Assignee: RYDER MATERIAL HANDLING LLC
    Inventors: Mark Keen, Michael Novak, Thomas Ryder
  • Publication number: 20150014948
    Abstract: A powered pallet truck with a selectable effective reduced turning radius, and an intermediate roller assembly for mounting on the powered pallet truck, are provided. The intermediate roller assembly can include a base, a linear actuator pivotably connected at a base end to the base, a linkage pivotably connected to the base, and at least one roller having an axis pivotably connected to an actuating end of the linear actuator and to the linkage, the at least one roller thus being movable between a retracted and an engagement position. The assembly can be mounted to the underside of a pallet truck fork having a load wheel. A turning radius effectively defined by a drive wheel of the pallet truck and the intermediate roller, or a turning radius effectively defined by the drive wheel and the load wheel, can be selected.
    Type: Application
    Filed: December 19, 2013
    Publication date: January 15, 2015
    Applicant: J. H. Ryder Machinery Limited
    Inventors: Mark Keen, Michael Novak, Thomas Ryder
  • Publication number: 20060032626
    Abstract: The invention relates to a device for heat exchange between flowable media. Said device comprises a heat exchanger block which is defined, on one side, by an inflow chamber (1) for supplying the liquid medium, and on the other side, by an outflow chamber (3) for evacuating the liquid medium. Said block comprises fluid channels (7) for the liquid medium, extending through the block from the inflow chamber (1) to the outflow chamber (3), and a covering plate (9) which extends from the inflow chamber (1) to the outflow chamber (3) and closes the block at one end. Said covering plate (9) is provided with at least one inner passage (13) which extends from the inflow channel (1) to the outflow channel (3) as a bypass flow channel bypassing the fluid channels (7).
    Type: Application
    Filed: May 2, 2003
    Publication date: February 16, 2006
    Inventor: Mark Keen