Ernest S Thomas

US Patent:

55728677, Nov 12, 1996

Filed:

Dec 30, 1994

Appl. No.:

8/366465

Inventors:

Mark W. Bekkering - Byron Center MI
Ernest C. Thomas - Kent City MI
Earl W. Mattson - Cedar Springs MI

Assignee:

Benteler Industries, Inc. - Grand Rapids MI

International Classification:

F01N 330

US Classification:

60305

Abstract:

A dual wall, air gap exhaust manifold with an integral inlet connecting flange defining an elongated, internal, air injection passageway enclosed by an L-shaped plate welded over an elongated slot in the flange to form the elongated passageway, the L-shaped plate also being welded over a series of short channels which extend between the elongated passageway and the manifold inlet openings. The elongated passageway has an air inlet connector. The spaced dual walls of the manifold runners are joined together at the flange openings, just downstream of the channels.