Patents by Inventor Robert M. Berlin

Robert M. Berlin 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).

  • Trimodal air/fluid driven sash operator fume hood
    Patent number: 5759096
    Abstract: A fume hood sash operator and fume hoods containing such sash operators. The sash operator is constructed to operate from a pressure fluid cylinder which has no outside operating parts with respect to the movement of the piston in the cylinder. The unique construction of the pressure fluid cylinder makes it very useful for fume hood construction because of the overall small dimensions of the pressure fluid cylinder and the ability to start the piston by overcoming the inertia of the piston using very low air or fluid pressures.
    Type: Grant
    Filed: May 13, 1997
    Date of Patent: June 2, 1998
    Assignee: Zeigler Enterprises, Inc.
    Inventors: Robert M. Berlin, Warren L. Zeigler
  • Down draft work table
    Patent number: 5303659
    Abstract: A down draft work table useful in removing obnoxious fumes and gases. The work table comprises a support structure which contains a flat top mounted on an open-topped V-bottomed down draft chamber. The down draft chamber is attached such that one end of the V-bottom is lower than the opposite end of the V-bottom. The down draft chamber is assisted in the removal of gases by a series of air ducts and an air flow package. At least two work tables can be connected together in tandem through the air flow package.
    Type: Grant
    Filed: January 10, 1992
    Date of Patent: April 19, 1994
    Assignee: Zeigler Enterprises
    Inventors: Robert M. Berlin, Richard L. Wendt, Warren L. Zeigler, Waynne R. Zeigler
  • Trimodal piston driven sash operator
    Patent number: 4774878
    Abstract: What is disclosed is a new and novel fume hood sash operator system and a fume hood containing such a system. The sash operator is constructed to operate from a pressure fluid cylinder so that the sash member can be stopped, started, moved up or down to accommodate changes in the flow of air moving through the hood structure and to provide a safe, durable, energy savings sash operating system.
    Type: Grant
    Filed: November 12, 1986
    Date of Patent: October 4, 1988
    Assignee: Tri City Laboratory Specialists, Inc.
    Inventors: Robert M. Berlin, Richard L. Wendt, Warren L. Ziegler