Patents by Inventor Timothy C. Duke

Timothy C. Duke 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: 7467936
    Abstract: A cartridge assembly for connection to a frame of a high temperature, high pressure press, having an anvil at a front end of a cylindrical body of the cartridge and a hydraulic chamber within the body adapted to apply axial pressure to the anvil. A radial compression element is disposed around an outer diameter of the body and is adapted to limit radial expansion of the body proximate the hydraulic chamber.
    Type: Grant
    Filed: March 27, 2007
    Date of Patent: December 23, 2008
    Inventors: David R. Hall, Ronald Crockett, Scott Dahigren, Timothy C. Duke
  • Patent number: 7458645
    Abstract: In one aspect of the invention, a system for removing a layer of a paved surface includes a vehicle adapted to traverse a paved surface in a selected direction. A milling drum attached to the vehicle may be adapted to rotate around an axle substantially normal the selected direction of the vehicle. A moldboard may be positioned rearward of the milling drum and also connected to the vehicle. The moldboard may comprise an end that is adapted to push aggregate removed from the paved surface in the selected direction. A plurality of nozzles may be disposed proximate the end of the moldboard which may also be in communication with a fluid reservoir through a fluid pathway.
    Type: Grant
    Filed: December 1, 2006
    Date of Patent: December 2, 2008
    Inventors: David R. Hall, David Wahiquist, Timothy C. Duke, Joe Fox, Tyson J. Wilde
  • Publication number: 20080241293
    Abstract: A cartridge assembly for connection to a frame of a high temperature, high pressure press, having an anvil at a front end of a cylindrical body of the cartridge and a hydraulic chamber within the body adapted to apply axial pressure to the anvil. A radial compression element is disposed around an outer diameter of the body and is adapted to limit radial expansion of the body proximate the hydraulic chamber.
    Type: Application
    Filed: March 27, 2007
    Publication date: October 2, 2008
    Inventors: David R. Hall, Ronald Crockett, Scott Dahigren, Timothy C. Duke
  • Publication number: 20080193579
    Abstract: A cartridge assembly for connection to the frame of a high pressure, high temperature press, comprising a front end. The front end may comprise a back up with a conical portion intermediate and coaxial with an anvil and a piston. The anvil may comprise a proximal end in contact with the back-up and a distal end being adapted to form part of a pressurized chamber within the frame. The back-up may comprise a truncated cylinder comprising a first and second interface that are joined by a peripheral cylindrical wall. The cylindrical wall may also comprise a portion extending normally from the periphery of the first interface to a net concave portion of the cylindrical wall. The net concave portion may extend from the normal portion of the cylindrical wall to the periphery of the second interface which abuts the anvil.
    Type: Application
    Filed: February 12, 2007
    Publication date: August 14, 2008
    Inventors: David R. Hall, Scott Dahlgren, Timothy C. Duke
  • Publication number: 20080193580
    Abstract: A cartridge assembly for connection to the frame of a high pressure, high temperature press, comprising a front end. The front end may comprise a back up with a conical portion intermediate and coaxial with an anvil and a piston. The anvil may comprise a proximal end in contact with the back-up and a distal end being adapted to form part of a pressurized chamber within the frame. The back-up may comprise a truncated cylinder comprising a first and second interface that are joined by a peripheral cylindrical wall. The cylindrical wall may also comprise a portion extending normally from the periphery of the first interface to a net concave portion of the cylindrical wall. The net concave portion may extend from the normal portion of the cylindrical wall to the periphery of the second interface which abuts the anvil.
    Type: Application
    Filed: February 13, 2007
    Publication date: August 14, 2008
    Inventors: David R. Hall, Scott Dahlgren, Timothy C. Duke
  • Publication number: 20080193581
    Abstract: A cartridge assembly for connection to the frame of a high pressure, high temperature press, comprising a front end. The front end may comprise a back up with a conical portion intermediate and coaxial with an anvil and a piston. The anvil may comprise a proximal end in contact with the back-up and a distal end being adapted to form part of a pressurized chamber within the frame. The back-up may comprise a truncated cylinder comprising a first and second interface that are joined by a peripheral cylindrical wall. The cylindrical wall may also comprise a portion extending normally from the periphery of the first interface to a net concave portion of the cylindrical wall. The net concave portion may extend from the normal portion of the cylindrical wall to the periphery of the second interface which abuts the anvil.
    Type: Application
    Filed: February 13, 2007
    Publication date: August 14, 2008
    Inventors: David R. Hall, Scott Dahigren, Timothy C. Duke
  • Publication number: 20080129103
    Abstract: In one aspect of the invention, a system for removing a layer of a paved surface includes a vehicle adapted to traverse a paved surface in a selected direction. A milling drum attached to the vehicle may be adapted to rotate around an axle substantially normal the selected direction of the vehicle. A moldboard may be positioned rearward of the milling drum and also connected to the vehicle. The moldboard may comprise an end that is adapted to push aggregate removed from the paved surface in the selected direction. A plurality of nozzles may be disposed proximate the end of the moldboard which may also be in communication with a fluid reservoir through a fluid pathway.
    Type: Application
    Filed: December 1, 2006
    Publication date: June 5, 2008
    Inventors: David R. Hall, David Wahiquist, Timothy C. Duke, Joe Fox, Tyson J. Wilde
  • Patent number: 7354262
    Abstract: The present invention includes a hydraulic cartridge and unitary frame connection for a high pressure high temperature press apparatus with the hydraulic cartridge having a cylindrical base and truncated hollow conical section The truncated section has an external threadform with a taper between about 2.650 and 5.650 inches per foot. The unitary frame having an opening with an internal threadform extending axially substantially between an outer surface and an inner reaction chamber defined by the unitary frame and the internal threadform being threadedly mated with the external threadform of the hydraulic cartridge such that a load is substantially equally distributed across the external threadform.
    Type: Grant
    Filed: January 29, 2007
    Date of Patent: April 8, 2008
    Inventors: David R. Hall, Scott Dahlgren, Timothy C. Duke, Joe Fox
  • Publication number: 20080056820
    Abstract: In one aspect of the present invention, a paved surface reconditioning system has a vehicle adapted to traverse a paved surface. The vehicle having a press plate with a working surface having plurality of nozzles disposed therein. At least one of the nozzles has an inner diameter less than 1 mm. A fluid passage may connect the nozzle to a reservoir. The reservoir and fluid passage have a volume and a pressurizing mechanism in communication with the volume and being adapted to pressurize at least a portion of the volume.
    Type: Application
    Filed: September 6, 2006
    Publication date: March 6, 2008
    Inventors: David R. Hall, David Wahiquist, Timothy C. Duke, Codrin Daranga
  • Patent number: 7287818
    Abstract: A vertical milling apparatus for a paved surface has a rotary degradation element which has a top end connected to a carrier. The carrier is slideably attached to an underside of a motorized vehicle, and adapted to traverse the paved surface. The rotary degradation element has an axis of rotation and a plurality of inserts secured to the element's outer surface. At least one insert has a superhard working surface positioned to contact the paved surface.
    Type: Grant
    Filed: May 4, 2006
    Date of Patent: October 30, 2007
    Inventors: David R. Hall, Timothy C. Duke, Joe Fox, Tyson J. Wilde
  • Patent number: 7231766
    Abstract: The present invention includes a piston valve for charging and discharging a first fluid chamber. The piston valve includes a piston shaft and a ring comprising a seal element. The piston shaft has a first end and a second end with the first end including a counter bore having at least one vent. The ring is disposed within a cylinder and the seal element is disposed intermediate the piston shaft and the ring. The piston valve may be used for intensification purposes such as in a high pressure high temperature hydraulic cartridge.
    Type: Grant
    Filed: August 19, 2005
    Date of Patent: June 19, 2007
    Inventors: David R. Hall, Timothy C. Duke, Ronald Crockett, Jeff Jepson
  • Patent number: 7186104
    Abstract: The present invention includes a hydraulic cartridge and unitary frame connection for a high pressure high temperature press apparatus. The invention includes a hydraulic cartridge and a unitary frame threaded together. The hydraulic cartridge includes a cylindrical base and a truncated hollow conical section with external threads having a taper between about 2.650 and 5.650 inches per foot. The unitary frame defines an inner reaction chamber and has an outer surface. An opening in the unitary frame has internal threads extending axially substantially between the outer surface and the inner reaction chamber. The internal threads are adapted to mate with the hydraulic cartridge and the hydraulic cartridge is attached to the unitary frame along the length of the threads.
    Type: Grant
    Filed: July 6, 2005
    Date of Patent: March 6, 2007
    Inventors: David R. Hall, Scott Dahlgren, Timothy C. Duke, Joe Fox