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:
Nov. 20, 1984
Filed:
Dec. 20, 1982
Masahiro Abe, Chiba, JP;
Katsuo Motosaka, Narashino, JP;
Hitachi, Ltd., Tokyo, JP;
Abstract
A vortex blower having an impeller provided with an annular recess laterally opening around an axis of rotation, a casing disposed so as to face the impeller and cover a radially outer portion of the impeller, an arcuate recess formed around the rotation axis in a portion of the casing which extends between a suction port and a discharge port and opposes to the annular recess, and a plurality of blades provided in the annular recess to divide the recess into a plurality of circumferentially arranged pockets, each having a radially outer end extending towards the arcuate recess beyond the annular recess. The vortex blower having such a construction can operate safely even when drawing air in which dust is suspended.