Patents by Inventor Jan Flodquist

Jan Flodquist 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).

  • Scraper device for a continuous digester
    Patent number: 5736005
    Abstract: The present invention relates to a scraper device, preferably a bottom scraper arranged at the bottom of a continuous digester for pulp production, which scraper comprises at least one scraper arm (12), preferably arranged with shovel members (13), a shaft (6) and drive device (15) for driving the scraper arm (12), an axially extending bore (8) inside the shaft (6) for supplying liquid, and a sealing arrangement (3, 4, 5, 14) for sealing between the atmosphere and the medium in which the scraper arm (12) is intended to rotate, the bore (8) extending along only a limited part of the shaft (6) at that end of the shaft (6) on which the scraper arm (12) is arranged.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: April 7, 1998
    Assignee: Kvaerner Pulping Technologies Aktiebolag
    Inventor: Jan Flodquist