Patents by Inventor Dale Lewis Kroger

Dale Lewis Kroger 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 tube to header swaging process
    Patent number: 6178636
    Abstract: A method for making a heat exchanger assembly (10) includes inserting tubes (20) through fin holes (32) in heat exchanger fins (30) and headers (40, 42) to form a bundle (50), and expanding the tubes (20) forming an interference fit with the heat exchanger fins (30). The bundle (50) is inserted into a housing (60) open at both end; (67, 68) and having a wall (62) surrounding the headers (40, 42) with inlet and outlet lines (64, 66) in the wall (62), and sealing the wall (62) of the housing (60) to the first and second headers (40, 42) with the inlet and outlet lines (64, 66) disposed between the headers (40, 42). A plurality of mandrel heads (70) are inserted through the open ends (67, 68) of the housing (60) into the tubes (20) expanding the tubes (20) into the headers (40, 42) to form a sealed joint between the tubes (20) and the headers (40, 42).
    Type: Grant
    Filed: June 5, 2000
    Date of Patent: January 30, 2001
    Assignee: Behr Heat Transfer Systems, Inc.
    Inventors: Dale Lewis Kroger, Kevin Kent Stahlecker, Les Dean VanDenTop, Adeel Zaidi
  • Heat exchanger tube to header swaging process
    Patent number: 6138747
    Abstract: A method for making a heat exchanger assembly (10) includes inserting tubes (20) through fin holes (32) in heat exchanger fins (30) and headers (40, 42) to form a bundle (50), and expanding the tubes (20) forming an interference fit with the heat exchanger fins (30). The bundle (50) is inserted into a housing (60) open at both ends (67, 68) and having a wall (62) surrounding the headers (40, 42) with inlet and outlet lines (64, 66) in the wall (62), and sealing the wall (62) of the housing (60) to the first and second headers (40, 42) with the inlet and outlet lines (64, 66) disposed between the headers (40, 42). A plurality of mandrel heads (70) are inserted through the open ends (67, 68) of the housing (60) into the tubes (20) expanding the tubes (20) into the headers (40, 42) to form a sealed joint between the tubes (20) and the headers (40, 42).
    Type: Grant
    Filed: February 17, 1999
    Date of Patent: October 31, 2000
    Assignee: Dehr Heat Transfer System, Inc.
    Inventors: Dale Lewis Kroger, Kevin Kent Stahlecker, Les Dean VanDenTop, Adeel Zaidi