Patents Assigned to Enn Vallak
  • Method for removing heat-insulating material from an ingot mold before the removal of the ingot
    Patent number: 4016002
    Abstract: A method for removing heat-insulating material, at least some of which is frangibly caked, from an ingot mold before removal of the hot ingot from the mold comprising the steps of providing a low-pressure vacuum, conducting the vacuum through a rigid, manually manipulatable, heat-resistant conduit, and simultaneously fragmentizing the caked heat-insulating material with, and applying the low-pressure vacuum through, the rigid conduit for removing the heat-insulating material.
    Type: Grant
    Filed: November 11, 1975
    Date of Patent: April 5, 1977
    Assignee: Enn Vallak
    Inventor: Hannes Vallak