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1. (WO2017156137) COMPACT POWERED AIR PURIFYING RESPIRATOR WITH AUTO-CHANGE FILTER AND BUILT-IN END OF SERVICE LIFE INDICATOR

Pub. No.:    WO/2017/156137    International Application No.:    PCT/US2017/021375
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Thu Mar 09 00:59:59 CET 2017
IPC: A62B 18/08
A62B 23/02
A62B 18/00
Applicants: HONEYWELL INTERNATIONAL INC.
Inventors: GANGADHAR, Durgam
PULLI, Anitha
PALACHARLA, Praveen Kumar
TUMU, Anjaiah
KAGITHAPU, PhaniKumar
JITENDRA, Narasimha
Title: COMPACT POWERED AIR PURIFYING RESPIRATOR WITH AUTO-CHANGE FILTER AND BUILT-IN END OF SERVICE LIFE INDICATOR
Abstract:
Embodiments relate generally to methods and systems for refreshing filter media within a respirator and indicating end of service life for the filter media. A respirator may comprise a rollable filter media configured to be refreshed by rolling the filter media onto a roller. A rolling mechanism may rotate the roller, allowing for a fresh section of filter media to be placed in the air path of the respirator. The rolling mechanism may be controlled automatically by a motor and/or manually.