Patents by Inventor Frederick W. Metzger

Frederick W. Metzger 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).

  • Method of making of header for automotive air conditioner evaporator
    Patent number: 4827590
    Abstract: A header for an automotive air conditioner evaporator is made from a cut-off length of a cylindrical aluminum tube (10), one end of which is clamped on a cylindrical arbor (11) so that a header region (20) of the tube can be pressed into a generally rectangular shape in a channel-shaped forming tool (15). While confined within the forming tool, a forming arbor (25) having a generally rectangular cross-sectional shape is pressed into header region (20) to conform the header region to the shape of forming arbor (25) and the confines of forming tool (15).
    Type: Grant
    Filed: April 8, 1988
    Date of Patent: May 9, 1989
    Inventor: Frederick W. Metzger
  • Air conditioner condenser manifold
    Patent number: 4759405
    Abstract: An air conditioner condenser manifold uses a tube having a flat side and a semi-oval cross-sectional shape, with holes pierced into the flat side of the tube without removing any material from the tube. The material of the flat side of the tube within an indentation around each of the holes is formed into a cylindrical collar recessed into the tube and having an inside axial length longer than the unpierced thickness of the tube. The ends of smaller tubes are bonded into each of the collars so that bonding material is disposed in the indentations around the holes.
    Type: Grant
    Filed: March 18, 1987
    Date of Patent: July 26, 1988
    Inventor: Frederick W. Metzger