Patents by Inventor Robert F. Christian

Robert F. Christian 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).

  • Apparatus for continuously mixing and electrically heating flowable materials conveyed by a pair of rotatable screws
    Patent number: 5417492
    Abstract: An apparatus for continuously mixing and heating flowable materials comprises an inclined housing, at least two rotatable screws within the housing with each screw having a rotatably mounted shaft and a screw flight. The screws are arranged in parallel juxtaposition with their respective flights of opposite hand intermeshing. The shafts are driven in opposite rotation to each other and each shaft is hollow and is provided with electric heaters within the shaft for heating the flowable material.
    Type: Grant
    Filed: November 2, 1993
    Date of Patent: May 23, 1995
    Assignee: Christian Engineering
    Inventors: Robert F. Christian, Emil Z. Barish, Mikhail D. Mazur, Manuel M. Almojuela, Noland F. Nicdao
  • Screw conveyer
    Patent number: 4530432
    Abstract: The invention provides a screw conveyer which has a helically wound member (23) attached to the screw which member extends from each turn of the screw towards the next turn and is of decreasing diameter along the screw.
    Type: Grant
    Filed: September 13, 1983
    Date of Patent: July 23, 1985
    Assignee: Jude Engineering, Inc.
    Inventor: Robert F. Christian
  • Screw conveyer and furnace
    Patent number: 4504222
    Abstract: A screw conveyer is provided with a heat insulating casing (16) and with a plurality of pipe burners (30) arranged between a perforated bottom plate (17) of the casing and a housing (13) which contains the screw conveyer and is used for drying waste products which the conveyer feeds to a furnace (27).
    Type: Grant
    Filed: September 13, 1983
    Date of Patent: March 12, 1985
    Assignee: Jude Engineering, Inc.
    Inventor: Robert F. Christian
  • Conveyor for removal of bed drain material from a coal-burning fluidized bed combustor
    Patent number: 4408944
    Abstract: The invention provides a conveyer for receiving bed drain material from a coal-burning fluid bed combuster and consists of a jacketed water cooled casing in which is a helical flight for conveying said material, the flight being mounted on an outer tube which is supported by a bearing at one end only in cantilever fashion with its other end within the closed end of the water cooled tube, an inner water cooling tube being located within the outer tube for water to circulate through the inner tube and back through the outer tube.
    Type: Grant
    Filed: November 7, 1980
    Date of Patent: October 11, 1983
    Assignee: Jude Engineering, Inc.
    Inventor: Robert F. Christian
  • Inclined helical flight conveyor
    Patent number: 4297208
    Abstract: An inclined helical conveyer has a container containing a rotary shaft carrying a helical flight which has openings cut out of the flight adjacent the shaft serving to separate liquid from particulate material as the latter is conveyed up the conveyer.
    Type: Grant
    Filed: November 14, 1980
    Date of Patent: October 27, 1981
    Assignee: Jude Engineering, Inc.
    Inventor: Robert F. Christian