Patents by Inventor Hans-Olof ERIKSSON

Hans-Olof ERIKSSON 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 washing and dewatering pulp, a system for controlling such an apparatus, and a method for processing pulp in such an apparatus
    Patent number: 11702795
    Abstract: A method for processing pulp in an apparatus for washing and dewatering pulp, and a system for controlling this apparatus, the apparatus comprising two rotatable press rolls (102, 104) having a permeable outer surface (106, 108), and a vat (114, 116, 118), the press rolls (102, 104) defining a press nip (112) between them. The processing is determined by a set of variable operating parameters, which are adjusted and/or maintained during operation in response to deviations of measured values of control parameters in relation to their respective predetermined threshold values. The variable operating parameters include rotation speed of the press rolls. The control parameters include vat pressure and/or linear load.
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: July 18, 2023
    Assignee: VALMET AB
    Inventors: Jonas Orgård, Hans Lövgren, Stefan Norberg, Hans-Olof Eriksson, Peter Öhrström
  • AN APPARATUS FOR WASHING AND DEWATERING PULP, A SYSTEM FOR CONTROLLING SUCH AN APPARATUS, AND A METHOD FOR PROCESSING PULP IN SUCH AN APPARATUS
    Publication number: 20190264387
    Abstract: A method for processing pulp in an apparatus for washing and dewatering pulp, and a system for controlling this apparatus, the apparatus comprising two rotatable press rolls (102, 104) having a permeable outer surface (106, 108), and a vat (114, 116, 118), the press rolls (102, 104) defining a press nip (112) between them. The processing is determined by a set of variable operating parameters, which are adjusted and/or maintained during operation in response to deviations of measured values of control parameters in relation to their respective predetermined threshold values. The variable operating parameters include rotation speed of the press rolls. The control parameters include vat pressure and/or linear load.
    Type: Application
    Filed: September 11, 2017
    Publication date: August 29, 2019
    Applicant: VALMET AB
    Inventors: Jonas ORGÅRD, Hans LÖVGREN, Stefan NORBERG, Hans-Olof ERIKSSON, Peter ÖHRSTRÖM