Patent · US Expired

Breathing apparatus with a display unit

US5601078A · kind A · utility

140Cited by

6References

17Claims

0Family size

Assignee

DRAGERWERK AKTIEGESELLSCHAFT · DE

Inventors

Uwe Schaller · Treuen, DE
Detlef Wolter · Jena, DE
Hansjochen Schuck · Stockelsdorf, DE
Ralf Drews · Wulfen, DE

Key dates

Filing date	May 22, 1995
Grant date	Feb 11, 1997
Priority date	—
Expiry date	May 22, 2015

Classification

Technology area (CPC G)Physics
CPC primaryG01D11/28
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A breathing apparatus with a display unit for the transmission of measured data via a display field of the display unit into the field of vision of a person wearing the unit. The readability of the measured data displayed is improved in daylight with simultaneously reduced energy demand. The display field includes an LC display, which is at least transparent for transmission radiation. An optical concentrator is provided, which collects the ambient light via a light entering surface and emits the collected light via a light exiting surface.

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