Patents by Inventor Robert O. Wraight

Robert O. Wraight 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).

  • Method of assembling a vacuum cleaner
    Patent number: 5283939
    Abstract: A snap-together vacuum cleaner housing comprises at least three discrete pieces which can be assembled and disassembled without the use of adhesive, fasteners, or tools. A lock ring comprises two semicircles of different radii. The lock ring encircles discrete portions of the housing and joins them together.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: February 8, 1994
    Assignee: Royal Appliance Mfg. Co.
    Inventors: Craig M. Saunders, James J. Kopco, Robert O. Wraight, Paul D. Stephens, Michael F. Wright
  • Snap-together housing
    Patent number: 5093956
    Abstract: A snap-together vacuum cleaner housing comprises at least three discrete pieces which can be assembled and disassembled without the use of adhesive, fasteners, or tools. A lock ring comprises two semicircles of different radii. The lock ring encircles discrete portions of the housing and joins them together.
    Type: Grant
    Filed: January 12, 1990
    Date of Patent: March 10, 1992
    Assignee: Royal Appliance Mfg. Co.
    Inventors: Craig M. Saunders, James J. Kopco, Robert O. Wraight, Paul D. Stephens, Michael F. Wright