Patent · US Active

Filter and vacuum cleaner having such a filter

US8539638B2 · kind B2 · utility

0Cited by

6References

18Claims

0Family size

Assignee

MIELE & CIE. KG · DE

Inventors

Andre Bertram · Bielefeld, DE
Seyfettin Kara · Spenge, DE
Monika Seifert · Detmold, DE
Stefan Tiekoetter · Bielefeld, DE
Cornelius Wolf · Bielefeld, DE

Key dates

Filing date	Apr 27, 2011
Grant date	Sep 24, 2013
Priority date	—
Expiry date	Apr 9, 2032

Classification

Technology area (CPC A)Human Necessities
CPC primaryA47L9/122
WIPO fieldFurniture, games
WIPO sectorOther fields

Abstract

A filter includes a filter medium, a filter inlet side, a filter outlet side and an indicator device. The indicator device is configured to be acted upon by air flow through the filter and is disposed adjacent to the filter medium and extends from the filter inlet side to the filter outlet side. The indicator device includes an air path starting from the filter inlet side, a viewing window covering the air path on the filter outlet side, and a flow-through usage indicator configured to receive filtered material and disposed in the air path and visible beneath the viewing window on the filter outlet side.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.