Patents by Inventor Douglas R. Harper

Douglas R. Harper 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).

  • PAINT SPRAYER
    Publication number: 20140339329
    Abstract: According to one embodiment, an apparatus comprises a paint container, a paint sprayer assembly, movable grip members, and a ring. The paint container has an outer diameter. The paint sprayer assembly includes a housing having an air inlet and a nozzle located on the housing. The movable grip members are supported on the housing in a circular array having an inner diameter greater than the outer diameter of the paint container. The ring extends circumferentially about the circular array of grip members. The ring is supported on the housing for rotation relative to the housing, and is configured to move the grip members to a condition in which the inner diameter of the circular array is not greater than the outer diameter of the paint container upon rotation of the ring relative to the housing.
    Type: Application
    Filed: December 19, 2012
    Publication date: November 20, 2014
    Inventors: Bobby Lynn Lawrence, Douglas R. Harper
  • Compressor shroud
    Patent number: D507279
    Type: Grant
    Filed: September 2, 2004
    Date of Patent: July 12, 2005
    Assignee: Campbell Hausfeld/Scott Fetzer Company
    Inventors: Douglas R. Harper, Tony Michael Guard
  • Air compressor
    Patent number: D536007
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: January 30, 2007
    Assignee: Campbell Hausfeld/Scott Fetzer Company
    Inventors: Gary S. Bass, Douglas R. Harper
  • Air compressor
    Patent number: D536707
    Type: Grant
    Filed: June 28, 2005
    Date of Patent: February 13, 2007
    Assignee: Campbell Hausfeld/Scott Fetzer Company
    Inventors: Gary S. Bass, Douglas R. Harper
  • Compressor shroud
    Patent number: D475721
    Type: Grant
    Filed: February 27, 2002
    Date of Patent: June 10, 2003
    Assignee: Campbell Hausfeld/Scott Fetzer Company
    Inventors: Douglas R. Harper, James Louie Tobergtan, Tony Michael Guard, Min-Hsieng Wang, Joseph Robert Stephens
  • Control panel for a compressor
    Patent number: D489736
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: May 11, 2004
    Assignee: Campbell Hausfeld/Scott Fetzer Company
    Inventors: Douglas R. Harper, James Louis Tobergta, Tony Michael Guard, Joseph Robert Stephens
  • Control panel for a compressor
    Patent number: D495717
    Type: Grant
    Filed: March 4, 2003
    Date of Patent: September 7, 2004
    Assignee: Campbell Hausfeld/Scott Fetzer Company
    Inventors: Douglas R. Harper, James Louis Tobergta, Tony Michael Guard, Joseph Robert Stephens
  • Compressor shroud
    Patent number: D497917
    Type: Grant
    Filed: July 28, 2003
    Date of Patent: November 2, 2004
    Assignee: Campbell Hausfeld/Scott Fetzer Company
    Inventors: Douglas R. Harper, Tony Michael Guard, Matthew D. Bantly
  • Compressor
    Patent number: D636409
    Type: Grant
    Filed: July 21, 2009
    Date of Patent: April 19, 2011
    Assignee: Campbell Hausfeld/Scott Fetzer Company
    Inventors: Darrin W. Wilmes, Berlie E. Parks, David O. Shumate, Douglas R. Harper