Patents by Inventor Andrew J. Doberstein

Andrew J. Doberstein 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).

  • Patent number: 7062936
    Abstract: A compact refrigerator has a split cabinet defining insulated refrigerator and clear ice maker sections. Its refrigeration system includes one external compressor and condenser and two evaporators, one for each section. The condenser is coupled to the inlet of the ice maker evaporator by a capillary tube and the evaporators are connected in series via a line having a refrigerator valve. The compressor receives return refrigerant from the outlet side of either the refrigerator evaporator or the ice maker evaporator depending on the state of a bypass valve, which is closed when the refrigerator valve is open, and vice versa. Refrigerant is thus routed to the ice maker evaporator to make ice and to both the ice maker and refrigerator evaporators when the refrigerator needs cooling. A hot gas bypass valve allows pre-condensed refrigerant exiting the compressor to bypass the condenser and be routed to the ice maker evaporator for harvesting the clear ice cubes.
    Type: Grant
    Filed: November 21, 2003
    Date of Patent: June 20, 2006
    Assignee: U-Line Corporation
    Inventors: Thomas W. Rand, Andrew J. Doberstein, Joseph H. Zyduck
  • Patent number: 6935712
    Abstract: A refrigeration unit with improved storage and accessibility features has a thermally insulated cabinet and door defining a storage space with a plurality of support elements. The support elements include easily removable door shelves and horizontal cabinet shelves that can be removed or repositioned without the door being fully opened due to dished regions adjacent the shelf supports that allow the shelves to be pivoted and removed rather than slid straight out of the cabinet. Indicia on one of the shelves follows the contour of one of the door shelves to indicate approximately the shelf space occupied by an adjacent door shelf and thus where items can be set without interfering with the closure of the door. The refrigeration unit also includes a cam assembly at the lower door hinge which biases the door closed when open approximately 35 degrees or less. The refrigeration unit also includes features for attaching an overlay panel to the door easily.
    Type: Grant
    Filed: February 14, 2002
    Date of Patent: August 30, 2005
    Assignee: U-Line Corporation
    Inventors: William A. Reed, Thomas W. Rand, Dean G. Byczynski, Joseph E. Braun, Andrew J. Doberstein, Lawrence D. Moye, Jack L. Vaughn, Jeffrey A. Ziminski
  • Publication number: 20030151339
    Abstract: A refrigeration unit with improved storage and accessibility features has a thermally insulated cabinet and door defining a storage space with a plurality of support elements. The support elements include easily removable door shelves and horizontal cabinet shelves that can be removed or repositioned without the door being fully opened due to dished regions adjacent the shelf supports that allow the shelves to be pivoted and removed rather than slid straight out of the cabinet. Indicia on one of the shelves follows the contour of one of the door shelves to indicate approximately the shelf space occupied by an adjacent door shelf and thus where items can be set without interfering with the closure of the door. The refrigeration unit also includes a cam assembly at the lower door hinge which biases the door closed when open approximately 35 degrees or less. The refrigeration unit also includes features for attaching an overlay panel to the door easily.
    Type: Application
    Filed: February 14, 2002
    Publication date: August 14, 2003
    Inventors: William A. Reed, Thomas W. Rand, Dean G. Byczynski, Joseph E. Braun, Andrew J. Doberstein, Lawrence D. Moye, Jack L. Vaughn, Jeffrey A. Ziminski