Patents by Inventor Allen J. Sack

Allen J. Sack 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: 4926760
    Abstract: A self leveling table for holding articles on the table at a constant level regardless of the number of articles on the top of the table with the self leveling table including a pair of scissor arms that are restrained from closing by a set of springs whose compression force can be adjusted, the scissor arms pivotally mounted in the table with one end of the springs including a cam bar with a pair of cam followers for engaging cam surfaces on the scissors arms to smoothly control the raising and lowering of the self leveling table when materials are added or removed from the table and spaced lifting surfaces on the self leveling table, to permit an operator with a forklift to move the self leveling table.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: May 22, 1990
    Inventor: Allen J. Sack