Patents by Inventor David E. Langenkamp

David E. Langenkamp 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).

  • Heat-exchanger especially for forced air furnaces
    Patent number: 5301654
    Abstract: A forced air furnace (11) has a heat exchanger (35) with one or more tube pack assemblies (10). Each tube pack assembly (10) has a burner (21) situated to fire into a primary fire tube (30) which is mechanically connected through a transition cap (36) to a plurality of secondary tubes (37, 38, 39, 41) returning combustion products from the primary fire tube (30) to a collection manifold (24) at the intake end of a draft inducer assembly (23) for discharge of the combustion products to a flue. In the preferred embodiment, the transition cap (36) is connected to the primary fire tube (30) and to the secondary tubes (37, 38, 39, 41) by a mechanical interlock.
    Type: Grant
    Filed: July 29, 1992
    Date of Patent: April 12, 1994
    Assignee: Consolidated Industries Corp.
    Inventors: Richard H. Weber, III, Paul T. Richardson, David E. Langenkamp, Gerald K. Gable