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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.

Patent No.:

US 7557458 B1

PDFFull Text
Date of Patent:
Jul. 07, 2009

Filed:

Jul. 10, 2007

Soundproof type engine generator

Applicants:

Masanobu Yamamoto, Shizuoka-ken, JP;

Hidenori Takahashi, Shizuoka-ken, JP;

Inventors:

Masanobu Yamamoto, Shizuoka-ken, JP;

Hidenori Takahashi, Shizuoka-ken, JP;

Assignee:

Yamaha Motor Power Products Kabushiki Kaisha, Shizuoka-ken, JP;

Attorney:

Knobbe, Martens, Olson & Bear, LLP

Primary Examiner:

Nicholas Ponomarenko

Assistant Examiner:

Pedro J Cuevas

Int. Cl.
CPC ...
H02P 9/04 (2006.01); F03D 9/00 (2006.01); F02B 63/04 (2006.01); H02K 7/18 (2006.01); H02K 5/00 (2006.01); F02B 63/00 (2006.01); F01P 1/02 (2006.01); H05B 7/11 (2006.01); B23K 9/10 (2006.01);
U.S. Cl.
CPC ...
Abstract

A soundproof type engine generator has a first external air inlet and a second external air inlet formed on a soundproof case K. A first cooling passage guides external air drawn in through the first external air inlet through a duct to a first fan, then from the first fan to a generator and discharges the air out of the soundproof case K. A second cooling passage guides external air drawn in through the second external air inlet to an engine using a second fan and then discharges the air out of the soundproof case The first fan is made up of a disk-like planar part, a plurality of first blades and a plurality of second blades, respectively provided radially on both head and tail sides of the planar part. External air drawn with the plurality of first blades through the first external air inlet is guided through the duct to the generator, and discharged out of the soundproof case. Air in the soundproof case is discharged with the plurality of second blades out of the soundproof case. The soundproof type engine generator effectively cools the interior of the soundproof case and simplifies the constitution of the air feed passage via the layout and configuration of the fan.

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