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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 5603607 B1

PDFFull Text
Date of Patent:
Feb. 18, 1997

Filed:

Nov. 08, 1995

Propeller fan

Applicant:
Inventors:

Fumio Kondo, Nagoya, JP;

Masami Taniguchi, Nagoya, JP;

Masateru Hayashi, Aichi-ken, JP;

Akihiro Ito, Aichi-ken, JP;

Assignee:

Mitsubishi Jukogyo Kabushiki Kaisha, Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Edward K Look

Assistant Examiner:

Christopher Verdier

Int. Cl.
CPC ...
F04D / ;
U.S. Cl.
CPC ...
416228 ; 4162 / ; 415119 ;
Abstract

The present invention provides a propeller fan having a blade trailing edge of a sawtooth shape, in which the flows on the negative pressure side and the pressure side of a blade join gradually, so that the velocity loss is decreased in the vicinity of the trailing edge. As a result, the velocity gradient decreases and the generation of turbulence is reduced as compared with the conventional propeller fan, so that the noise is reduced and the fan efficiency is enhanced.

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Kondo, Fumio. (1997). Propeller fan (U.S. Patent No. 5603607). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5603607

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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