Patents Assigned to EVV-Vermogensverwaltungs-GmbH
  • Agitator mill
    Patent number: 5624080
    Abstract: An agitator mill is provided with a separate grinding-stock/auxiliary-grinding-body separator device, which comprises a rotor, drivable to rotate, for the separation of the auxiliary grinding bodies from the treated grinding stock. The auxiliary grinding bodies and untreated grinding stock are returned to the agitator mill. The separator device and the agitor mill and the lines connecting these two form a closed system.
    Type: Grant
    Filed: September 8, 1995
    Date of Patent: April 29, 1997
    Assignee: EVV-Vermogensverwaltungs-GmbH
    Inventors: Norbert Stehr, Philipp Schmitt
  • Method and apparatus for the continuous autogenous grinding of free-flowing stock
    Patent number: 5570846
    Abstract: For the continuous autogenous grinding of a free-flowing stock containing insoluble particles of varying diameter, the stock is set rotating concentrically of an axis in a grinding chamber, insoluble particles of greater diameter being concentrated superproportionally in the grinding chamber. There is no need of an auxiliary-grinding-body retaining device.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: November 5, 1996
    Assignee: EVV-Vermogensverwaltungs-GmbH
    Inventor: Norbert Stehr
  • Agitator mill
    Patent number: 5566896
    Abstract: An agitator mill comprises a grinding receptacle and an agitator unit disposed in the latter and having an agitator shaft. The agitator shaft is hollow, this grinding-stock/auxiliary-grinding-body return chamber being connected with the grinding chamber at one end of the agitator shaft. At the other end of the agitator shaft, the return chamber opens into a cage-type section of the agitator shaft, an auxiliary-grinding-body retaining device likewise projecting into this section.
    Type: Grant
    Filed: September 7, 1995
    Date of Patent: October 22, 1996
    Assignee: EVV-Vermogensverwaltungs-GmbH
    Inventors: Norbert Stehr, Philipp Schmitt
  • Agitator mill
    Patent number: 5544825
    Abstract: An agitator mill comprises a grinding receptacle, in which a high-speed agitator is disposed. An auxiliary-grinding-body outlet discharges from an end of the grinding receptacle, a grinding-stock and auxiliary-grinding-body return line leading from this outlet to the other end of the grinding receptacle. Directly adjoining the auxiliary-grinding-body outlet, a grinding-stock supply line opens into the line, which ensures the auxiliary grinding bodies to circulate reliably.
    Type: Grant
    Filed: August 24, 1995
    Date of Patent: August 13, 1996
    Assignee: EVV-Vermogensverwaltungs-GmbH
    Inventor: Norbert Stehr