Patents by Inventor Henry F. Keller

Henry F. Keller 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).

  • Water permeable heat exchanger for condensing furnace
    Patent number: 4807588
    Abstract: A gas-fired condensing furnace with a corrosion resistant condensing heat exchanger. The condensing heat exchanger is formed from a perforated flat sheet of engineering metal with a layer of polymer sheet material laminated thereto. Each condensing heat exchanger has a condensing flow passage of serpentine shape formed in the laminated flat perforated sheet of engineering metal such that the polymer layer is permeated by water condensed from the flue gases, and the permeated water flows through the perforated sheet metal and is not allowed to accumulate at the interface between the engineering metal and the polymer sheet.
    Type: Grant
    Filed: November 5, 1987
    Date of Patent: February 28, 1989
    Assignee: Carrier Corporation
    Inventors: Richard M. Bentley, Chester D. Ripka, Henry F. Keller