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:
Dec. 28, 1982
Filed:
Mar. 17, 1981
Kenichi Watanabe, Hitachi, JP;
Hiroshi Kinoshita, Hitachi, JP;
Akira Tatsumi, Hitachi, JP;
Koichi Goto, Yamagata, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
An electric fan having a rotary grille provided with a plurality of inclined grille plates and a small-sized reversibly rotatable synchronous electric motor adapted to rotatively drive the rotary grille. A plurality of pairs of projections are formed on a peripheral portion of the rotary grille at different distances from the center of the rotary grille and at different angular intervals. A slidable stopper is mounted on the frame of the electric fan. The stopper is adjustably positionable so as to enable engagement with selected one of the pairs of projections or to a position where it does not contact the projections, so that the rotary grille is reciprocatingly rotated within an angular range limited by the projections or rotated continuously in one direction to vary the area or region of application of an air flow.