The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Date of Patent:
Aug. 01, 2000

Filed:

Mar. 19, 1999
Applicant:
Inventors:

Shinichi Morohoshi, Wako, JP;

Tomohiro Hirano, Wako, JP;

Ryuji Tsuru, Wako, JP;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
F02B / ;
U.S. Cl.
CPC ...
123-2 ; 123 4157 ;
Abstract

An engine operated working machine includes an engine and a working machine to be driven by the engine surrounded by a soundproof case. An exhaust compartment housing a muffler is formed in the soundproof case. An exhaust pipe connected with the muffler is bent in a direction so as to direct exhaust gas discharged therefrom away from an exhaust air opening of the exhaust compartment and has an opening positioned apart from the exhaust air opening. Cooling air forced into the exhaust compartment flows around the muffler and the exhaust pipe to cool them. Exhaust gas discharged from the exhaust pipe into the exhaust compartment is mixed with the cooling air to change a discharging direction thereof and is then discharged outside of the soundproof case through the exhaust air opening.


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