Patents by Inventor Douglas C. Barker

Douglas C. Barker 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: 6134746
    Abstract: A compact, hand held carpet and upholstery extractor nozzle is provided having a pair of air turbine powered vertical axis rotary scrub brushes located adjacent the extractor nozzle. The turbine has at least one ambient air inlet and an outlet that communicates with a suction tube extending from the extractor nozzle. A compact gear reduction operatively connects the air turbine to the scrub brushes. A turbine outlet baffle is preferably provided that extends from an upstream edge of the turbine outlet, into the suction tube and over and beyond the turbine outlet to direct air, liquid and debris flowing through the suction tube over and beyond the turbine outlet opening. A downstream end of the baffle is open and suction openings pass through the baffle, for providing fluid communication between the suction tube and the turbine outlet opening.
    Type: Grant
    Filed: February 5, 1999
    Date of Patent: October 24, 2000
    Assignee: The Hoover Company
    Inventors: Daniel R. Miller, Douglas C. Barker, John A. Leonatti, Kenneth L. Symensma
  • Patent number: 6108860
    Abstract: A portable compact extractor having permanent solution and recovery tanks integrally formed in a single main tank portion, with a removable power head attached to the top of the main tank. A fill port passes through the powerhead into the cleaning solution tank and a pour spout is formed in the recovery tank. With this construction, the cleaning solution tank may be filled with water and, if desired, detergent, by pouring the water and detergent into the fill port in the power head, and the recovery tank may be emptied as desired simply by tipping the unit and pouring the contents of the recovery tank out the pour spout and down the drain, without ever having to remove any tanks, bottles or the power head from the unit, or disconnect and reconnect any tubes. A carry handle is located on the powerhead to facilitate transportation of the unit, removal of the power head from the main tank for cleaning the tanks when desired, and to facilitate pouring the contents of the recovery tank out of the pour spout.
    Type: Grant
    Filed: April 8, 1998
    Date of Patent: August 29, 2000
    Assignee: The Hoover Company
    Inventors: Darwin S. Crouser, Douglas C. Barker, Edgar A. Maurer
  • Patent number: 5960514
    Abstract: A wheel driven suction nozzle having an upper body attached to an under body. An opening is formed at a front of the upper body which provides access to a suction cavity. An agitator covered with a fluff material is removably rotatably mounted within the cavity and extends partially out a bottom of the under body to clean and shine bare floors. A cover is hingedly mounted to the upper body and movable between an open position which provides access to the cavity and allows for removal of the agitator, and a closed position which covers the cavity and prevents removal of the agitator. A cogged front pulley is attached to one end of the agitator. A cogged belt is driven by a rear cogged pulley and engages the front pulley whereby rotation of the rear pulley rotates the agitator. A front gear is rigidly connected to the rear pulley and engages a rear gear which is rigidly connected to an axle shaft.
    Type: Grant
    Filed: November 10, 1997
    Date of Patent: October 5, 1999
    Assignee: The Hoover Company
    Inventors: Daniel R. Miller, Vincent L. Weber, Douglas C. Barker
  • Patent number: 5961676
    Abstract: A hard bag cleaner door is disclosed having air directing rib vanes integral with its inner surface. These vanes take the form of, alternately, angled J-shaped ribs and short straight interleaved ribs. All the ribs are stepped so that the flow passage for air moving along the interior side of the bag door diverges as more bag air is introduced to it so that it directs efficiently air flow to a lower disposed motor-fan section of an adjoining hard bag portion. In a second embodiment, an exhaust opening is formed in the hard bag cleaner door below the air directing rib vanes and is covered by a final filter and final filter door. The air moving along the interior side of the bag door is directed out the exhaust opening, through the final filter which filters small dust particles which may be present in the exhaust air and out vent openings formed in the final filter door.
    Type: Grant
    Filed: May 13, 1998
    Date of Patent: October 5, 1999
    Assignee: The Hoover Company
    Inventors: Douglass A. King, Raymond L. Lawer, David P. Parks, Kurt D. Harsh, Douglas C. Barker, Jeffrey S. Louis, Anson W. Telford, David B. Rennecker
  • Patent number: 5870798
    Abstract: A portable compact extractor having permanent solution and recovery tanks integrally formed in a single main tank portion, with a removable power head attached to the top of the main tank. A fill port passes through the powerhead into the cleaning solution tank and a pour spout is formed in the recovery tank. With this construction, the cleaning solution tank may be filled with water and, if desired, detergent, by pouring the water and detergent into the fill port in the power head, and the recovery tank may be emptied as desired simply by tipping the unit and pouring the contents of the recovery tank out the pour spout and down the drain, without ever having to remove any tanks, bottles or the power head from the unit, or disconnect and reconnect any tubes. A carry handle is located on the powerhead to facilitate transportation of the unit, removal of the power head from the main tank for cleaning the tanks when desired, and to facilitate pouring the contents of the recovery tank out of the pour spout.
    Type: Grant
    Filed: May 3, 1996
    Date of Patent: February 16, 1999
    Assignee: The Hoover Company
    Inventors: Darwin S. Crouser, Douglas C. Barker, Edgar A. Maurer
  • Patent number: 5867864
    Abstract: A compact, hand held carpet and upholstery extractor nozzle is provided having a pair of air turbine powered vertical axis rotary scrub brushes located adjacent the extractor nozzle. The turbine has at least one ambient air inlet and an outlet that communicates with a suction tube extending from the extractor nozzle. A compact gear reduction operatively connects the air turbine to the scrub brushes. A turbine outlet baffle is preferably provided that extends from an upstream edge of the turbine outlet, into the suction tube and over and beyond the turbine outlet to direct air, liquid and debris flowing through the suction tube over and beyond the turbine outlet opening. A downstream end of the baffle is open and suction openings pass through the baffle, for providing fluid communication between the suction tube and the turbine outlet opening.
    Type: Grant
    Filed: May 2, 1997
    Date of Patent: February 9, 1999
    Assignee: The Hoover Company
    Inventors: Daniel R. Miller, A. Ronald Keebler, Douglas E. Gerber, Douglas C. Barker
  • Patent number: 5443362
    Abstract: An air turbine is provided having an entrance stator blade arrangement formed in two halfs, each containing a blade array, with the two halfs interleaved, upon turbine assembly, to thereby easily form an entrance stator with a multiplicity of entrance stator blades.
    Type: Grant
    Filed: March 16, 1994
    Date of Patent: August 22, 1995
    Assignee: The Hoover Company
    Inventors: Timothy E. Crites, Douglas C. Barker, Joseph W. Clifford, Darwin S. Crouser
  • Patent number: D473686
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: April 22, 2003
    Assignee: The Hoover Company
    Inventors: Matthew J. Archer, Douglas C. Barker, David W. Moine
  • Patent number: D474315
    Type: Grant
    Filed: May 8, 2002
    Date of Patent: May 6, 2003
    Assignee: The Hoover Company
    Inventors: Matthew J. Archer, Douglas C. Barker, David W. Moine, Ryan S. Steiner, Ronald J. Stephens
  • Patent number: D488893
    Type: Grant
    Filed: May 9, 2001
    Date of Patent: April 20, 2004
    Assignee: The Hoover Company
    Inventors: David W. Moine, Douglas C. Barker, Christopher J. Fawcett
  • Patent number: D398100
    Type: Grant
    Filed: May 6, 1996
    Date of Patent: September 8, 1998
    Assignee: The Hoover Company
    Inventors: Ronald J. Stephens, Douglas C. Barker, Darwin S. Crouser, Darwin T. McKnight, Edgar A. Maurer
  • Patent number: D426688
    Type: Grant
    Filed: April 23, 1999
    Date of Patent: June 13, 2000
    Assignee: The Hoover Company
    Inventors: David W. Moine, Douglas C. Barker, Lynn A. Frederick, Richard A. Wareham, John D. Essex
  • Patent number: D426689
    Type: Grant
    Filed: May 3, 1999
    Date of Patent: June 13, 2000
    Assignee: The Hoover Company
    Inventors: William G. Alford, Douglas C. Barker, Lynn A. Frederick, David W. Moine
  • Patent number: D427397
    Type: Grant
    Filed: April 27, 1999
    Date of Patent: June 27, 2000
    Assignee: The Hoover Company
    Inventors: William G. Alford, Douglas C. Barker, Lynn A. Frederick, David W. Moine