Patient ventilation device including blower with scallopped shroud

US10975880B2 · kind B2 · utility

Assignee

• ResMed Pty Ltd · AU

Inventors

• Adel Nibu · Birkenfeld, DE
• Johannes Nickol · Munich, DE
• Achim Biener · Erding, DE
• Johann Sebastian Burz · Germaringen, DE
• Bernd Christoph Lang · Bogen, DE
• Saad Nasr · Sydney, AU
• Robert Eibl · Annaberg-Buchholz, DE
• Andreas Kirchberger · Sinzing, DE
• Christian Bayer · Penzberg, DE

Key dates

• Filing date: Jan 27, 2020
• Grant date: Apr 13, 2021
• Expiry date: Jan 27, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01B7/0823
• WIPO field: Medical technology
• WIPO sector: Instruments

Abstract

A blower for a respiratory apparatus includes an impeller configured to rotate to pressurize the supply of gas. The impeller includes a shroud with a plurality of vanes extending from a surface of the shroud toward the gas inlet. Each vane radiates outwards from a hub in the shroud that is configured to receive a motor shaft. The outer diameter of the shroud varies between maximum portions with a maximum outer diameter and minimum portions with a minimum outer diameter. The maximum portions are located at the vanes and the minimum portions are located between the vanes. In addition, each vane has an intermediate point located a predetermined distance from the hub that marks the beginning of a curvature of the vane in the direction of the impeller's rotation. The curvature of the vane is located between the intermediate point and the radially outermost end of the vane.