Patents by Inventor Klas Ralvert

Klas Ralvert 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).

  • Patent number: 5492567
    Abstract: A method and an apparatus for continuous preheating of powdered starch in the preparation of modified starch are disclosed. The powdered starch (1) is fed into a preheating circuit including an inlet opening (2) for powdered starch in a conduit (3), and is pneumatically conveyed in the conduit by a hot air flow. When the powdered starch has been preheated by the air to the desired temperature, it is separated from the air in a separating device (4), whereupon the air is recycled in the circuit via a conduit (5), a fan (10) and a heat exchanger (14) for reheating the air, back to the inlet opening (2) for conveying and preheating of a fresh quantity of powdered starch. If necessary, excess air can be removed from, or supplementary air be supplied to, the preheating circuit.
    Type: Grant
    Filed: June 9, 1993
    Date of Patent: February 20, 1996
    Assignee: Sveriges Starkelseproducenter Forening UPA
    Inventor: Klas Ralvert
  • Patent number: 5076924
    Abstract: A filter plate (1) is described on which a filter cloth (4) is disposed across the whole top side and glued or welded to the outer sides, and which is used for filtering off particles from a liquid. The plate has a large number of apertures (2), each individual aperture area being at most 2.25 cm.sup.2. The total free open area of the plate is 70-90% of the total plate area and the thickness of the plate is at least 5 mm.
    Type: Grant
    Filed: June 28, 1990
    Date of Patent: December 31, 1991
    Assignee: Hydrotech Nils-Ake Persson AB
    Inventors: Nils-Ake Persson, Klas Ralvert
  • Patent number: 4867998
    Abstract: A process for manufacturing potato fibers and potato fibers manufactured in the process. According to the process, potatoes are subjected to washing, dividing into potato juice, starch and pulp, and subsequently separating of starch from potato juice and pulp. The process is distinguished in that solid impurities are removed from the pulp, potato juice being defoamed and added to the pulp to form a pulp/potato juice mixture which is relieved of solid impurities by density separation. Subsequently, the pulp is dewatered to remove part of the potato juice, and the dewatered pulp is refined such that the content of potato juice and dissolved salts in the pulp is reduced in that the pulp is prepressed to a dry solids content of 20-30% and thereupon washed by adding water to obtain a dry solids content of 11-16%, whereupon the pulp is finally pressed to a dry solids content of 20-30%. Finally, the refined pulp is subjected to drying and grinding to the final potato fiber product.
    Type: Grant
    Filed: June 16, 1988
    Date of Patent: September 19, 1989
    Assignee: Sveriges Starkelseproducenter
    Inventor: Klas Ralvert