Suction appliance for cleaning purposes

US8474093B2 · kind B2 · utility

Assignee

• Alfred Kärcher GmbH & Co. KG · DE

Inventor

• Felix Treitz · Winnenden, DE

Key dates

• Filing date: Dec 5, 2011
• Grant date: Jul 2, 2013
• Expiry date: Dec 5, 2031

Classification

• Technology area (CPC A): Human Necessities
• CPC primary: A47L9/20
• WIPO field: Furniture, games
• WIPO sector: Other fields

Abstract

Suction appliance for cleaning purposes, comprising a dirt collecting container with a suction outlet on which a filter is held, a suction unit for acting upon the dirt collecting container with negative pressure, a suction chamber between the suction unit and the filter with an external air inlet, via which external air can flow into the suction chamber to act upon the filter on the clean-space side, a valve device with a valve seat forming the external air inlet, a movable valve body to seal and release the valve seat, and an actuating member to cause the valve body to be transferred from a closed position to an open position. The appliance can comprise an energy storage device, to which energy to be stored can be supplied by actuating the actuating member. Stored energy can be released for transferring the valve body from the closed position to the open position.