Patents by Inventor Thomas J. Belka, Jr.

Thomas J. Belka, Jr. 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).

  • Air filtration unit
    Patent number: 5167681
    Abstract: A modular, low-profile ceiling air filtration unit is disclosed having a diffuser plate with an unperforated zone along one edge, the remainder of the plate being perforated. A blower in the unit plenum directs air toward the end of the plenum having the unperforated zone. Turbulent air impinging on the housing end wall is prevented from passing through to a filter by the unperforated zone of the diffuser plate.
    Type: Grant
    Filed: June 25, 1991
    Date of Patent: December 1, 1992
    Assignee: Clean Rooms International, Inc.
    Inventors: Donald L. O'Keefe, Thomas J. Belka, Jr.