Patent · US Expired

Switchgear cabinet including a smoke indicator means

US6720886B2 · kind B2 · utility

8Cited by

4References

18Claims

0Family size

Assignee

RITTAL GMBH & CO. KG · DE

Inventors

Michael Seelbach · Freudenberg, DE
Heinrich Strackbein · Biebertal, DE
Markus Hain · Dillenburg, DE
Edgar Nickel · Steffenberg, DE

Key dates

Filing date	Mar 20, 2002
Grant date	Apr 13, 2004
Priority date	—
Expiry date	May 25, 2022

Classification

Technology area (CPC G)Physics
CPC primaryG08B17/113
WIPO fieldControl
WIPO sectorInstruments

Abstract

A switchgear cabinet including a smoke indicator which has an intake pipe and, in a housing, a smoke sensor as well as a fan or ventilator, which draws air from the interior of the switchgear cabinet into the housing via an inlet aperture in a housing wall and discharges the air via an outlet into the space outside the housing. A sensitive smoke indicator, which is also usable with the switchgear cabinet partially open, has the intake pipe communicating by its upper end region with the inlet aperture. The housing which is enclosed in a sealing manner apart from the intake pipe and the outlet, is disposed in the interior of the switchgear cabinet.

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