Patents Assigned to Alfred Gutmann Gesellschaft fur Maschinenbau
  • Device for blasting large and bulky workpieces
    Patent number: 4064656
    Abstract: Apparatus for blasting particulate material onto workpieces wherein the workpiece is positioned within an enclosure, and a centrifugal impeller of a conventional type is supported in the enclosure on mobile mounting means for movement in a plurality of directions in such a manner that large surfaces or surfaces of complicated shapes can be blasted. The mobile mounting means and the centrifugal impeller can be operated remotely from outside the enclosure.
    Type: Grant
    Filed: June 9, 1976
    Date of Patent: December 27, 1977
    Assignee: Alfred Gutmann Gesellschaft fur Maschinenbau
    Inventor: Johannes Zeidler
  • Centrifugal impeller for sandblasting installations
    Patent number: 4047843
    Abstract: A centrifugal impeller of the so-called single-disc wheel type wherein the projector blades are mounted by dovetail joints to the impeller wheel and locked in position by releasable entirely encapsulated leaf springs inserted into recesses between the impeller wheel and an associated projector blade.
    Type: Grant
    Filed: June 11, 1976
    Date of Patent: September 13, 1977
    Assignee: Alfred Gutmann Gesellschaft fur Maschinenbau
    Inventors: Johannes Zeidler, Bernd Von Borcke
  • Method of cooling recovered sand for casting purposes and apparatus therefor
    Patent number: 4037648
    Abstract: Method and apparatus for the substantially continuous cooling of recovered casting sand in discrete compartments of a bunker whereby the sand in each compartment is cooled while substantially at rest in heat exchange relation with heat exchanger means disposed within the compartment, and the sand thoughput through the compartments is controlled by gates.
    Type: Grant
    Filed: April 3, 1975
    Date of Patent: July 26, 1977
    Assignee: Alfred Gutmann Gesellschaft fur Maschinenbau
    Inventor: Sisir Kumar Maitra