Patent · US Active

Smoke detector and method of checking blockage of its smoke holes

US8294587B2 · kind B2 · utility

4Cited by

0References

23Claims

0Family size

Assignee

ISTA INTERNATIONAL GMBH · DE

Inventors

Michael Danz · Lancaster, US
Sebastian Schnepel · Essen, DE
Gerhard Niederfeld · Essen, DE

Key dates

Filing date	Jun 1, 2010
Grant date	Oct 23, 2012
Priority date	—
Expiry date	Jun 18, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG08B29/043
WIPO fieldControl
WIPO sectorInstruments

Abstract

A smoke detector has a housing, a smoke sensor in the housing capable of detecting smoke therein, and an alarm connected to the sensor signaling when the smoke sensor detects smoke. A partition subdivides the housing into separate first and second chambers, and the housing is formed with first and second smoke holes allowing air from the exterior into the first and second chambers. The partition has a sensor port provided with a sensor for detecting air flow through the sensor port and a fan port having a fan for drawing air from one of the chambers and forcing it into the other chamber. A controller connected to the fan and to the air-flow sensor operates the fan means to move air from the one chamber through the fan port into the other chamber and generates an output when air flow through the sensor port exceeds a predetermined limit.

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