Patents by Inventor Raymond J. Pitre

Raymond J. Pitre 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).

  • Apparatus for digesting pulp in a displacement batch digester that uses displacement liquor having a sufficient hydrostatic head
    Patent number: 6139689
    Abstract: An apparatus and method for use in a displacement batch digesting process is provided which reduces the amount of equipment required to carry out an efficient displacement batch digestion process. Specifically, an apparatus and method are disclosed which eliminates the need for separate warm fill pumps, hot fill pumps and further which consolidates the cool pad pump, displacement pump and dilution pump functions into a single booster pump. Still further, the recirculation pump and discharge pump functions are consolidated into a single pump.
    Type: Grant
    Filed: June 11, 1997
    Date of Patent: October 31, 2000
    Assignee: Beloit Technologies, Inc.
    Inventors: Jeremiah W. Polston, Raymond J. Pitre, Helmut Bohm