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:
Oct. 15, 1991
Filed:
Aug. 08, 1989
Syozo Tanaka, Nara, JP;
Yoshiharu Shinobu, Kashiharashi, JP;
Sharp Kabushiki Kaisha, Osaka, JP;
Abstract
A cross flow type fan system is provided with a tongue having a first surface positioned adjacent the outlet of the fan system in a direction generally parallel to the direction of travel of a majority of the air exiting the system. The tongue further has a second surface of a given width positioned at an angle relative to the first surface and a third surface having a given width with the first and third surfaces being positioned generally perpendicular to one another. Due to the shape of the tongue, static pressure of the discharge air flow can increase at both ends of the discharge opening. Pressure characteristics of the discharge air flow is therefore improved to obtain better stability. Ends of the tongue can be positioned further from an outward circumferential surface of the fan than the middle section of the tongue due to differences in cross-sectional shape. The middle section of the tongue can also have a point of protrusion in cross section at a lower position while the ends of the tongue have a generally flat face in cross section at the lower position. This arrangement will improve overall stability of discharge air, especially in the low air volume range.