Exhaust gas muffler for the combustion engine of a portable work

Details Exhaust gas muffler for the combustion engine of a portable work Exhaust gas muffler for the combustion engine of a portable work

1999-03-26

2000-03-28

Martin, David

Acoustics

Sound-modifying means

Muffler, fluid conducting type

181212, 181239, 181264, 181282, 173DIG2, 415119, 60317, F01N 3500

Patent

active

060418907

ABSTRACT:
An exhaust gas muffler for an internal combustion engine of a portable, hand-guided working tool has a housing having an exhaust gas inlet, and exhaust gas outlet, and an outlet space, wherein the exhaust gas outlet opens into the outlet space. An outlet opening is provided downstream of the outlet space and has wall elements directing the exhaust gas flow in the exit flow direction. A rebound wall is positioned transverse to the exhaust gas outlet and delimits the outlet space while providing a connecting slot into the outlet opening. The connecting slot is spaced at a distance from the outer wall of the housing that extends substantially parallel to the rebound wall. A first ramp is positioned perpendicularly to the connecting slot and slants upwardly from the rebound wall to the outlet opening. A second ramp extends in a direction of longitudinal extension of the connecting slot from an end of the insertion slot opposite the first ramp to the edge of the first ramp opposite the connecting slot.

REFERENCES:
patent: 1280386 (1918-10-01), Buehner
patent: 1342464 (1920-06-01), Sawders et al.
patent: 3650354 (1972-03-01), Gordon
patent: 4142607 (1979-03-01), Landwehr et al.
patent: 4231221 (1980-11-01), Mathner et al.
patent: 5315075 (1994-05-01), Junginger et al.

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