Muffler and working machine

Details Muffler and working machine Muffler and working machine

2007-02-15

2010-06-01

Martin, Edgardo San (Department: 2832)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S231000

Reexamination Certificate

active

07726443

ABSTRACT:
A muffler of a work machine in the form of an engine blower includes: a muffler body; and a diffuser that covers an exhaust outlet of exhaust gas provided on the muffler body. The diffuser has a diffusion space to diffuse the exhaust gas and an exhaust surface on which a plurality of exhaust circular holes are provided to exhaust the exhaust gas to an outside. An opening ratio provided by the exhaust holes of the exhaust surface is gradually increased from a portion corresponding to the exhaust opening toward an outer periphery of the exhaust surface.

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International Preliminary Report on Patentability, Chapter I of the Patent Cooperation Treaty,and Written Opinion for PCT/JP2007/052751 dated Aug. 19, 2008. 5 sheets.

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