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.:
Date of Patent:
May. 01, 1979
Filed:
Oct. 18, 1976
Juichi Honda, Fujisawa, JP;
Tatsumi Tamaki, Tokyo, JP;
Akira Suzuki, Nagareyama, JP;
Yoshimi Inoue, Tokyo, JP;
Hitachi, Ltd., , JP;
Abstract
The disclosure is concerned with an axial fan having a casing. Unacceptably high level of noise and low discharge pressure inherent in axial fans are attributable to a counter flow of fluid taking place through the gap between the radially outer ends of the rotating blades and the casing. The invention is directed to preventing the counter flow by providing guide vanes disposed in the gap and inclined symmetrically with the rotating blade, thereby to provide enhanced output flow rate and discharge pressure, as well as to reduce the level of noise. The invention is applicable also to such axial fan as having a baffle plate on the suction side of the rotating blade in the proximity thereof.