Patents by Inventor Håkan Hulden

Håkan Hulden 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).

  • Conditioning doctor blade for fiber web machine
    Patent number: 10821679
    Abstract: A conditioning doctor blade (11) for a fiber web machine contains a number of reinforcement fiber layers (24, 26) laminated on top of one another into an epoxy matrix (20), and silicon carbide particles (21), so that the reinforcement fiber layers (24, 26) have formed a fiber core (22) and surface fiber layers (23) on both sides of the fiber core (22). There is less epoxy matrix (20) in the fiber core (22) than in the surface fiber layers (23).
    Type: Grant
    Filed: June 27, 2018
    Date of Patent: November 3, 2020
    Assignee: VALMET TECHNOLOGIES, INC.
    Inventors: Håkan Hulden, Harri Ruotsalainen
  • Conditioning Doctor Blade for Fiber Web Machine
    Publication number: 20190001585
    Abstract: A conditioning doctor blade (11) for a fiber web machine contains a number of reinforcement fiber layers (24, 26) laminated on top of one another into an epoxy matrix (20), and silicon carbide particles (21), so that the reinforcement fiber layers (24, 26) have formed a fiber core (22) and surface fiber layers (23) on both sides of the fiber core (22). There is less epoxy matrix (20) in the fiber core (22) than in the surface fiber layers (23).
    Type: Application
    Filed: June 27, 2018
    Publication date: January 3, 2019
    Applicant: Valmet Technologies, Inc.
    Inventors: Håkan Hulden, Harri Ruotsalainen