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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 9995311 B1

PDFFull Text
Date of Patent:
Jun. 12, 2018

Filed:

May. 09, 2014

Centrifugal fan

Applicant:

Lg Electronics Inc., Seoul, KR;

Inventors:

Sang Yuk Son, Changwon-si, KR;

Choon Myun Chung, Changwon-si, KR;

Tae Man Yang, Changwon-si, KR;

Assignee:

LG ELECTRONICS INC., Seoul, KR;

Attorney:

Ked & Associates LLP

Primary Examiner:

Igor Kershteyn

Assistant Examiner:

Eric Zamora Alvarez

Int. Cl.
CPC ...
F04D 29/28 (2006.01); B21K 3/04 (2006.01); B21J 5/00 (2006.01); B21D 11/20 (2006.01); B23K 11/11 (2006.01); F04D 29/44 (2006.01); F04D 17/10 (2006.01); F04D 29/30 (2006.01); B23K 11/16 (2006.01); B23K 26/32 (2014.01); B23K 11/00 (2006.01); B23K 26/244 (2014.01); F04D 29/62 (2006.01); B23K 101/00 (2006.01); B23K 103/04 (2006.01);
U.S. Cl.
CPC ...
F04D 29/281 (2013.01); B21D 11/20 (2013.01); B21J 5/00 (2013.01); B21K 3/04 (2013.01); B23K 11/0026 (2013.01); B23K 11/11 (2013.01); B23K 11/115 (2013.01); B23K 11/16 (2013.01); B23K 26/244 (2015.10); B23K 26/32 (2013.01); F04D 17/10 (2013.01); F04D 29/282 (2013.01); F04D 29/30 (2013.01); F04D 29/441 (2013.01); F04D 29/626 (2013.01); B23K 2201/001 (2013.01); B23K 2203/04 (2013.01); Y10T 29/49329 (2015.01);
Abstract

A centrifugal fan is provided that includes a main plate configured to be rotated about a rotational axis, a shroud, having a suction opening, and a plurality of blades arranged in a circumferential direction between the main plate and the shroud to allow air suctioned in through the suction opening to flow from a front edge to a rear edge of each blade. Assuming a first cross section, a second cross section, a third cross section, and a fourth cross section of each blade sequentially taken at layers from the shroud to the main plate, a front edge of the first cross section is located farther from the rotational axis than a front edge of the fourth cross section, and a rear edge of the first cross section is located closer to the rotational axis than a rear edge of the fourth cross section.

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