Vacuum cleaner

US4052765A · kind A · utility

Assignee

• Vorwerk & Co. Elektrowerke KG.

Inventors

• Wieland Guhne · Remscheid, DE
• Klaus Hoffmann · Bad Tölz, DE

Key dates

• Filing date: Dec 10, 1975
• Grant date: Oct 11, 1977
• Expiry date: Dec 10, 1995

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A47L5/12
• WIPO field: Furniture, games
• WIPO sector: Other fields

Abstract

A housing in a vacuum cleaner is subdivided into a first space and a separate second space which does not communicate with the first space but is in heat-exchanging relationship with the first space. An impeller is located in the second space for sucking dust-laden air into one end of the second space and discharging it out the other. The drive motor for the impeller means is located in the first space. Thus, the drive means is not contacted by the dust-laden air passing through the second space but is nevertheless cooled by such dust-laden air.