Patents by Inventor Richard L. Wendt

Richard L. Wendt 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).

  • Fume hood having a driven sash and a travel interference system for the sash
    Patent number: 6024638
    Abstract: A fume hood having a trimodal piston driven sash operator which have been improved by the addition of a travel interference system for the moveable sash to prevent accidents and the possible breakage of glassware and the like.
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: February 15, 2000
    Inventors: Robert L. Berlin, Richard L. Wendt, 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
  • Fume hood sash operator
    Patent number: 4502375
    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 with a belt drive and a clutch mechanism so that the sash member can be stopped, started, moved up or down to accommodate changes in the flow or air moving through the hood structure and to provide a safe, durable, energy-saving sash operating system.
    Type: Grant
    Filed: August 18, 1983
    Date of Patent: March 5, 1985
    Assignee: Tri City Laboratory Specialists, Inc.
    Inventors: Alan L. Hignite, Richard L. Wendt, Roy F. Zeigler, Warren L. Zeigler