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:
Mar. 10, 1992
Filed:
Jun. 22, 1990
Yoshiro Takada, Tsuchiura, JP;
Shinya Yoshinaga, Tochigi, JP;
Atsushi Ootsuka, Tochigi, JP;
Youji Sekine, Tochigi, JP;
Hajime Fujita, Ibaraki, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An air blower for an air conditioning unit or system including a cross-flow fan, with stabilizer being mounted in a passage on a suction side of the cross-flow fan so as to extend from both side plates of the cross-flow fan toward a central part thereof within a range of L/D.ltoreq.2.5, where L equals the length of each of the stabilizers and D equals the outside diameter of the cylindrical bladed rotor of the cross-flow fan. By virtue of such an arrangement the back flow developing at positions of low flow velocities near both side plates when the flowing resistance of the suction passage has increased is prevented thereby preventing the occurrence of cyclic unsteady noise.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile