Patents by Inventor Michael G. Ruby

Michael G. Ruby 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).

  • Sludge treatment system
    Patent number: 5428906
    Abstract: A method of converting industrial, domestic or other sludge, into a pelletized or granular fertilizer, as well as a sludge converter for practicing the method. The sludge is dewatered to form sludge cake solids which are dried in a dryer, and then sorted with a sorter into a sorted product comprising oversized, undersized, and standard sized product. A portion of the sorted product is recycled for mixing and sizing in a mixer with the dewatered sludge cake solids. To control dust and odors, cyclones and a condenser remove a substantial portion of the gaseous particulate matter and condensable gases from the converter, and any remaining noncondensates are burned in the heat source flame. A waste oil burning heat source supplies heat energy to the dryer.
    Type: Grant
    Filed: January 5, 1994
    Date of Patent: July 4, 1995
    Assignees: PCL Environmental, Inc., Sludge Management, Inc.
    Inventors: Bart T. Lynam, Gerald F. Nelson, David H. Meese, Ronald V. Peterson, Michael G. Ruby, Alan White
  • Sludge treatment system
    Patent number: 5279637
    Abstract: A method of converting industrial, domestic or other sludge, into a pelletized or granular fertilizer, as well as a sludge converter for practicing the method. The sludge is dewatered to form sludge cake solids which are dried in a dryer, and then sorted with a sorter into a sorted product comprising oversized, undersized, and standard sized product. A portion of the sorted product is recycled for mixing and sizing in a mixer with the dewatered sludge cake solids. To control dust and odors, cyclones and a condenser remove a substantial portion of the gaseous particulate matter and condensable gases from the converter, and any remaining noncondensates are burned in the heat source flame. A waste oil burning heat source supplies heat energy to the dryer.
    Type: Grant
    Filed: October 23, 1990
    Date of Patent: January 18, 1994
    Assignees: PCL Environmental Inc., Sludge Management, Inc., Riedel Waste Systems, Inc.
    Inventors: Bart T. Lynam, Gerald F. Nelson, David H. Meese, Ronald V. Peterson, Michael G. Ruby, Alan White