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:
Apr. 24, 2012
Filed:
May. 23, 2007
Janpeter Kühnel, Bulach, CH;
Heinz-j{dot Over (U)}rgen Feld, Niederwil, CH;
Christine Lindblom, Nussbaumen, CH;
Janpeter Kühnel, Bulach, CH;
Heinz-J{dot over (u)}rgen Feld, Niederwil, CH;
Christine Lindblom, Nussbaumen, CH;
ABB Turbo Systems AG, Baden, CH;
Abstract
The guide device for the diffusor at the compressor impeller outlet of a radial compressor has guide blades with stepped inlet edges. The step is implemented by setting back the hub-side inlet edge. This meridional stepping divides the guide blades into two component blades, of which the first component blade is made longer than the second component blade. The set-back of the inlet edge of the hub-side component blade and the associated superposition of the noise fields which are produced on the front and rear inlet edge of the diffusor leads to improvement of the acoustic properties of the compressor.