Patents Assigned to Biolan Oy
  • Apparatus for turning and/or mixing a flat bed compost
    Patent number: 6382828
    Abstract: An apparatus for turning and mixing a flat bed composting mass includes an even number of mixing worms that each rotate about a vertical shaft. The end of each vertical shaft may include a wear-resistant element on its end which serves to protect the shaft during operation. The vertical shafts may also be hollow and include an air hole for transmitting air into the composting mass. The pair of mixing worms preferably rotate in opposite directions to lift the composting mass upwardly from the bottom of the mass.
    Type: Grant
    Filed: March 29, 2001
    Date of Patent: May 7, 2002
    Assignee: Biolan Oy
    Inventors: Markku Haukioja, Paavo Malkiainen, Osmo Haaslahti, Mikko Haaslahti
  • Double stage drumshaped composting device
    Patent number: 5843769
    Abstract: The invention relates to a two-stage composter drum which includes an inner, rotatably mounted drum and an insulated, stationary, outer drum. Waste is introduced into an opening at one end of the inner drum where it is partially degraded and then discharge through openings at the other end of the inner drum into the annular space provided between the inner and outer drums. The outer surface of the inner drum is provided with means for mixing and moving the composted waste contained within the annular space.
    Type: Grant
    Filed: January 17, 1997
    Date of Patent: December 1, 1998
    Assignee: Biolan Oy
    Inventor: Markku Jonninen