Title:
END OF SERVICE LIFE INDICATOR FOR AN AIR FILTER
Document Type and Number:
WIPO Patent Application WO/2013/028981
Kind Code:
A3
Abstract:
A device includes a cartridge containing a filter material. An insert extends through at least a portion of the filter material. The insert has gas sample path with an opening to provide a sample of air that is representative of the saturation of the filter material. A return path may be included in the insert to return sampled gas to the filter material. A gas mask contains a gas sensor and coupled to the cartridge, which may be replaced when saturated.
Inventors:
TOBIAS PETER (US)
LARSEN CHRISTOPHER SCOTT (US)
LARSEN CHRISTOPHER SCOTT (US)
Application Number:
PCT/US2012/052287
Publication Date:
December 19, 2013
Filing Date:
August 24, 2012
Export Citation:
Assignee:
HONEYWELL INT INC (US)
TOBIAS PETER (US)
LARSEN CHRISTOPHER SCOTT (US)
TOBIAS PETER (US)
LARSEN CHRISTOPHER SCOTT (US)
International Classes:
A62B18/08; A62B7/10; A62B9/00; A62B18/00; B01D53/04; G01N1/22
Domestic Patent References:
| WO2009029426A1 | 2009-03-05 | |||
| WO2008145988A1 | 2008-12-04 | |||
| WO1996012523A1 | 1996-05-02 |
Foreign References:
| CA2628699A1 | 2009-10-08 | |||
| DE3613512A1 | 1987-10-29 |
Attorney, Agent or Firm:
MADDEN, Robert B. et al. (Lundberg Woessner,P.O.Box 293, Minneapolis MN, US)
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