Patents by Inventor Alvar Andersson

Alvar Andersson 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: 5316076
    Abstract: A method and arrangement for enforced heat transmission between a solid or liquid alimentary body and an ambient gas takes place in connection with cooling/freezing or when cooking, frying or drying the entire part or parts of the alimentary body. This method and arrangement uses a low-frequency standing sound wave. The apparatus uses a low-frequency sound generator having a pulsator part and a resonator part. The resonator part is acoustically virtually closed and is designed so that the alimentary body, which is to be exposed to enforced heat transmission, is located within a zone inside the resonator part where the standing sound wave has a particle velocity anti-node.
    Type: Grant
    Filed: June 18, 1991
    Date of Patent: May 31, 1994
    Assignee: Frigoscandia Food Process Systems AB
    Inventors: Roland Sandstrom, Ann Maxe, Tore Strandberg, Lars Lundsten, Alvar Andersson
  • Patent number: 5199269
    Abstract: A pelletizer for making pellets from a liquid or semi-liquid food product has two molding rolls between which the food product is formed into pellets. The rolls have teeth of complementary shape, and the teeth of at least one roll have axially spaced apart recesses. The rolls are cooled with a refrigerant during the molding operation. By the means of the pelletizer, frozen pellets are made from a liquid or semi-liquid food product which, prior to molding, is refrigerated into moldable consistency before being supplied to the nip between the two cooperating molding rolls which are cooled during the molding operation so as to form surface-frozen pellets which are thereafter subjected to final freezing.
    Type: Grant
    Filed: November 19, 1990
    Date of Patent: April 6, 1993
    Assignee: Frigoscandia Food Process Systems Aktiebolag
    Inventor: Alvar Andersson
  • Patent number: 4761962
    Abstract: In a process for freezing liquid or semiliquid food products in the form of essentially uniform pellets, the nonfrozen food product is introduced into a container. The product is agitated within the container, while a liquid cooling gas is sprayed over the product. The partially frozen food product is then removed from the container before it is completely frozen and after formability has been achieved, and is formed into essentially uniform pellets which are completely frozen outside the container. An apparatus for carrying the process into effect comprises a container, an agitator mounted within said container, spray nozzles opening into the upper part of the said container for spraying the underlying food product in the container with a liquid cooling gas, a forming device for forming the partially frozen food product removed from said container into essentially uniform pellets, and a freezer for completely freezing the pellets thus formed.
    Type: Grant
    Filed: June 16, 1987
    Date of Patent: August 9, 1988
    Assignee: Frigoscandia Contracting AB
    Inventor: Alvar Andersson
  • Patent number: 3958629
    Abstract: A fluid receptacle is disclosed having at least one heat exchanging unit detachably mounted therein to permit an exchange of heat between a first fluid fed through said unit and a second fluid received in said receptacle. Said heat exchanging unit is sealingly mounted in an opening in the wall of the receptacle by means of an end flange provided at the outer end of said unit and having inlet and outlet conduits for said first fluid extending from its outer side. According to the invention the transverse dimensions of the heat exchanging unit are such as to permit said unit to be inserted into the receptacle and removed therefrom through a manhole provided in the wall of the receptacle. The receptacle is provided with a stationary annular supporting surface for the end flange of the heat exchanging unit.
    Type: Grant
    Filed: December 20, 1974
    Date of Patent: May 25, 1976
    Assignee: AB Svenska Maskinverken
    Inventor: Sven Erik Alvar Andersson