Patents by Inventor Darwin T. McKnight

Darwin T. McKnight 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).

  • Cleaner upper portion with tool storage and door
    Patent number: 5233722
    Abstract: An upright vacuum cleaner having an upper, hardened housing portion includes a tool containing tool storage well. A tool door is hinged to the housing to cover the well and includes a "breakaway" or hingedly detachable feature to limit damage to it or its associated structure from improper operation.
    Type: Grant
    Filed: December 9, 1991
    Date of Patent: August 10, 1993
    Assignee: The Hoover Company
    Inventors: Darwin T. McKnight, Gerald L. Melegari
  • Hose and tool rack
    Patent number: 5137156
    Abstract: A tool and hose rack is shown including a positive serpentine mounting for the hose which is discontinuous and offset to provide for overlap of the coiled hose. The hose mounting is U-shaped in cross section and includes ribbing to positively locate the mounted hose longitudinally.
    Type: Grant
    Filed: January 4, 1991
    Date of Patent: August 11, 1992
    Assignee: The Hoover Company
    Inventors: Richard F. Riczinger, Darwin T. McKnight
  • Central vacuum system wall valve
    Patent number: 5111841
    Abstract: A central vacuum system wall valve is described which includes a valve cap capable of being pivotally cammed to open position by its interaction with the roomside hose as this hose is moved to inserted position within the wall valve.
    Type: Grant
    Filed: November 26, 1990
    Date of Patent: May 12, 1992
    Assignee: The Hoover Company
    Inventors: William S. Houston, Darwin T. McKnight, Greg A. Bilek
  • Upper portion of a vacuum cleaner
    Patent number: D313681
    Type: Grant
    Filed: December 27, 1989
    Date of Patent: January 8, 1991
    Assignee: The Hoover Company
    Inventor: Darwin T. McKnight
  • Combined vacuum cleaner tool and hose rack
    Patent number: D329511
    Type: Grant
    Filed: January 4, 1991
    Date of Patent: September 15, 1992
    Assignee: The Hoover Company
    Inventor: Darwin T. McKnight
  • Power nozzle for a vacuum cleaner
    Patent number: D329512
    Type: Grant
    Filed: June 26, 1989
    Date of Patent: September 15, 1992
    Assignee: The Hoover Company
    Inventors: Darwin T. McKnight, David W. Moine
  • Combined vacuum cleaner hose and rack
    Patent number: D330615
    Type: Grant
    Filed: May 20, 1991
    Date of Patent: October 27, 1992
    Assignee: The Hoover Company
    Inventors: John D. Essex, Darwin T. McKnight
  • Combined vacuum cleaner hose and rack
    Patent number: D330616
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: October 27, 1992
    Assignee: The Hoover Company
    Inventors: Richard A. Wareham, Darwin T. McKnight
  • Combined vacuum cleaner hose and rack
    Patent number: D333020
    Type: Grant
    Filed: April 29, 1991
    Date of Patent: February 2, 1993
    Assignee: The Hoover Company
    Inventor: Darwin T. McKnight
  • Vacuum cleaner hose rack with tool storage
    Patent number: D334260
    Type: Grant
    Filed: May 9, 1991
    Date of Patent: March 23, 1993
    Assignee: The Hoover Company
    Inventors: Milton G. Kieft, Darwin T. McKnight
  • Combined vacuum cleaner hose and rack
    Patent number: D334261
    Type: Grant
    Filed: May 22, 1991
    Date of Patent: March 23, 1993
    Assignee: The Hoover Company
    Inventor: Darwin T. McKnight
  • Conversion door for vacuum cleaner hood
    Patent number: D338753
    Type: Grant
    Filed: September 9, 1991
    Date of Patent: August 24, 1993
    Assignee: The Hoover Company
    Inventors: Darwin T. McKnight, David W. Moine
  • Suction cleaner nozzle
    Patent number: D338990
    Type: Grant
    Filed: November 6, 1990
    Date of Patent: August 31, 1993
    Assignee: The Hoover Company
    Inventor: Darwin T. McKnight
  • Vacuum cleaner upper portion
    Patent number: D339435
    Type: Grant
    Filed: December 23, 1991
    Date of Patent: September 14, 1993
    Assignee: The Hoover Company
    Inventors: Darwin T. McKnight, Lynn A. Frederick