Patents by Inventor Delbert G. Keys

Delbert G. Keys 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).

  • Multi-poised condensing furnace
    Patent number: 5439050
    Abstract: A secondary condensing heat exchanger for use in a multi-poised furnace that includes multiple single pass heat transfer stages. Each stage includes a housing having an entrance at one end and a pair of outlets at the other end. The walls of the housing are arranged to conduct condensate formed in the housing through one or both outlets, depending on the orientation of the furnace. Lateral flow restrictors are mounted in the housing to direct flue gas products entering the housing back and forth across the housing.
    Type: Grant
    Filed: July 9, 1993
    Date of Patent: August 8, 1995
    Assignee: Carrier Corporation
    Inventors: Timothy J. Waterman, Larry D. Rieke, Delbert G. Keys