Patents by Inventor Rolf Ahlstrom

Rolf Ahlstrom 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: 8673145
    Abstract: An apparatus for the treatment of faeces, includes a tank (200) for housing faeces that has been subjected to treatment. There is a process vessel (202) in which the faeces is treated and which is located inside the tank (200) having an inlet (204) for feeding faeces into the process vessel (202). A rotary device (300) is provided for stirring the faeces in the process vessel (202) and for introducing oxygen into the faeces, which is operable in two modes of operation at different speeds of rotation. A partitioning member (212) separates the interior of the process vessel in a lower (216) and an upper (218) portion, while at the same time allowing communication between the lower and upper portions. The rotary device (300) is arranged to at least cause a suction of material mainly from the lower compartment in a first mode of operation and into the rotary device.
    Type: Grant
    Filed: April 29, 2009
    Date of Patent: March 18, 2014
    Inventor: Rolf Ahlstrom
  • Publication number: 20110067466
    Abstract: An apparatus for the treatment of faeces, includes a tank (200) for housing faeces that has been subjected to treatment. There is a process vessel (202) in which the faeces is treated and which is located inside the tank (200) having an inlet (204) for feeding faeces into the process vessel (202). A rotary device (300) is provided for stirring the faeces in the process vessel (202) and for introducing oxygen into the faeces, which is operable in two modes of operation at different speeds of rotation. A partitioning member (212) separates the interior of the process vessel in a lower (216) and an upper (218) portion, while at the same time allowing communication between the lower and upper portions. The rotary device (300) is arranged to at least cause a suction of material mainly from the lower compartment in a first mode of operation and into the rotary device.
    Type: Application
    Filed: April 29, 2009
    Publication date: March 24, 2011
    Inventor: Rolf Ahlstrom
  • Patent number: 6712980
    Abstract: The invention relates to an apparatus for the treatment of contaminated media, comprising a rotatable housing having at least one inlet (28) for gas emerging in the stirrer housing, and at least one suction opening (10; 32) for the medium to be treated. The housing is provided with a plurality of outlet openings (25; 27) arranged along its periphery. A plurality of vanes (22; 23) are arranged in the outlet openings (25; 27). A rotation transferring means (24) is provided to transfer a rotational movement to the stirrer. A method according to the invention comprises generating a vortex in the medium in such a way that an under-pressure occurs in the center of the vortex, and that a nitrogen containing gas is introduced in the center of the vortex.
    Type: Grant
    Filed: October 25, 2001
    Date of Patent: March 30, 2004
    Assignee: Gefle Virvelteknik AB
    Inventor: Rolf Ahlström