Method for producing a device for muffling sound or catalytic treatment of exhaust
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United States of America Patent
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-
Mar 21, 1995
Issued Date -
N/A
app pub date -
Oct 15, 1993
filing date -
Jul 8, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention is directed to a method for producing a device forming a muffler 1 or a catalytic converter comprising a casing having an outer wall part 4 and an inner wall part 5. The two wall parts 4, 5 are connected with one another at least at the ends of the casing and are constructed in such a way that there is an intermediate space 16 between them at least in some places. This intermediate space 16 is produced in that a pressure is generated between the inner wall part 5 and the outer wall part 4 by a substance in order to bend one wall part 4, 5 away from the other wall part 4, 5 at least in some places.
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