Patents by Inventor Eric J. Sjodahl

Eric J. Sjodahl 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).

  • Molten metal pour control system
    Patent number: 4724894
    Abstract: An apparatus and method for controlling the filling of mold sections with molten metal is disclosed.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: February 16, 1988
    Assignee: Selective Electronic, Inc.
    Inventor: Eric J. Sjodahl
  • Mold cavity misalignment detection system
    Patent number: 4724886
    Abstract: An apparatus and method for detecting the misalignment of cooperating mold sections is provided. The apparatus and method utilize a mold making machine which includes a device for forming a cavity of predetermined shape in the interior of each mold section and a device for forming a reference mark on the exterior of the mold surface, a conveyor for transporting the molds along a predetermined path from the mold making machine to a mold pouring station, and a non-contact distance measuring device for detecting the misalignment of the internal mold cavities of the mold sections by detecting any misalignment in the external reference marks.
    Type: Grant
    Filed: November 25, 1986
    Date of Patent: February 16, 1988
    Assignee: Selective Electronic, Inc.
    Inventor: Eric J. Sjodahl