05323774 is referenced by 37 patents and cites 10 patents.

A breathing mask with a mask interior, through which the respiration air flows, and with a detection device with an indicator for indicating the presence of a toxic substance having penetrated into the breathing mask, is to be improved such that the indicator can be activated when the breathing mask has been put on. To accomplish this task, the detection device (1), which gas-tightly surrounds the indicator (6), has an operating means (5), which can be operated from the outside (21) of the mask, and with which the indicator (6) can be brought into contact with the respiration air in the mask interior (22) when the breathing mask has been put on.

Title
Breathing mask with an indicator signalling penetration of a toxic substance into the mask
Application Number
8/21245
Publication Number
5323774
Application Date
February 23, 1993
Publication Date
June 28, 1994
Inventor
Kai Uwe Fehlauer
Lubeck
DE
Agent
McGlew and Tuttle
Assignee
Dragerwerk
DE
IPC
G01D 21/00
A62B 23/02
A62B 18/08
A62B 7/10
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