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. 04, 2022
Filed:
Feb. 26, 2020
Ebm-papst Mulfingen Gmbh & Co. KG, Mulfingen, DE;
Josef Rathgeb, Jagstzell, DE;
Oliver Haaf, Kupferzell, DE;
ebm-papst Mulfingen GmbH & Co. KG, Mulfingen, DE;
Abstract
A radial fan half-spiral housing has a pressure chamber extending in the circumferential direction about an axial intake opening () to a radial blow-out opening (). The pressure chamber, as viewed in the circumferential direction, is subdivided into at least one beginning portion (), one central portion (), and one blow-out portion. The intake opening () determines a central axis of rotation for a fan wheel. An averaged half-spiral housing radius, as viewed about the axis of rotation (), varies in the beginning portion (), the center portion (), and the blow-out portion (). It reaches a maximum in the blow-out portion (). The center portion () of the half-spiral housing radius is reduced in a region determining a maximum height H(δ,z) of the half-spiral housing () compared to a logarithmic spiral radius (r).