Vacuum cleaner turbo-brush

US9084520B2 · kind B2 · utility

Assignee

• MIELE & CIE. KG · DE

Inventors

• Walter Assmann · Bielefeld, DE
• Volker Marks · Bielefeld, DE
• Cornelius Wolf · Bielefeld, DE

Key dates

• Filing date: Apr 17, 2012
• Grant date: Jul 21, 2015
• Expiry date: Apr 26, 2034

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A47L9/0416
• WIPO field: Furniture, games
• WIPO sector: Other fields

Abstract

A vacuum cleaner turbo-brush includes an axial-inflow impulse turbine. The turbine includes a turbine shaft non-rotatably combined with an impeller that includes aerodynamically shaped, stud-like projections uniformly distributed along a circumferential line of the impeller. The aerodynamic shape has a cross-sectional area that is parabolically bound on both sides. The turbine also includes a guide stage having guide surfaces, each of which has a cross section including, in a direction of incident flow, a circular arc followed by a straight section. A bearing housing surrounds the turbine shaft and forms at least one of a transition and the guide stage in a region of the impeller, and the bearing housing, in a region of the turbine shaft, forming a casing for the turbine shaft and including bearing elements that support the turbine shaft.