Patents Assigned to Ray Harvey Company, Inc.
  • Method for cleaning sewers
    Patent number: 5129957
    Abstract: An apparatus and method for cleaning sewers of solid materials using normal and injected water flow to suspend the solids in a slurry. A submersible pump moves the slurry from the bottom of the sewer up to a pressurized container where the water content of the slurry is decanted and reused as injection water while the particulate material settles to the bottom of the pressurized container. When the container is filled with solid material it may be removed for emptying at a waste dump.
    Type: Grant
    Filed: August 19, 1991
    Date of Patent: July 14, 1992
    Assignee: Ray Harvey Company, Inc.
    Inventors: Sheron R. Sheppard, Henry B. Polston
  • Apparatus for cleaning sewers
    Patent number: 5068940
    Abstract: An apparatus and method for cleaning sewers of solid materials using normal and injected water flow to suspend the solids in a slurry. A submersible pump moves the slurry from the bottom of the sewer up to a pressurized container where the water content of the slurry is decanted and reused as injection water while the particulate material settles to the bottom of the pressurized container. When the container is filled with solid material it may be removed for emptying at a waste dump.
    Type: Grant
    Filed: November 1, 1990
    Date of Patent: December 3, 1991
    Assignee: Ray Harvey Company, Inc.
    Inventors: Sheron R. Sheppard, Henry B. Polston