Muffler with spark arresting function
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United States of America Patent
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Mar 11, 1986
Grant Date -
N/A
app pub date -
Oct 24, 1984
filing date -
Nov 11, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A muffler for use with various instruments and furnished with a spark arresting function. An inlet pipe for receiving exhaust gases from the instrument and an outlet pipe for discharging the exhaust gases to the atmosphere are arranged in an expansion chamber of a housing with their one end open to the latter. The expansion chamber is divided into two compartments by a partition having a wire net therewith. An intermediate pipe for providing fluid communication between the two compartments is mounted on the partition. The air flow area of the wire net and the cross-sectional area of the intermediate pipe are selected such that the quantity of the gases flowing through the wire net is larger than that of the gases flowing through the intermediate pipe. The outlet pipe is formed with an exhaust gas inlet through its side wall portion which is larger in area than the open one end and covered with a wire net. The inlet and outlet pipes are formed respectively with a plurality of exhaust gas outlet apertures and a plurality of exhaust gas inlet apertures adjacent to their nearby ends.
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