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Patent Searching and Data


Title:
HELMET-MOUNTED RESPIRATOR APPARATUS WITH A DUAL PLENUM SYSTEM
Document Type and Number:
WIPO Patent Application WO/2011/126884
Kind Code:
A3
Abstract:
Powered air respirators include a helmet, a filtering assembly within the helmet, and a face shield assembly pivotably attached to and depending from the front of the helmet and in fluid communication with the filtering assembly by a filtered-air passageway. The filtering assembly includes a blower assembly including an filtered-air outlet and an inlet, the filtered-air outlet being in fluid communication with the filtered-air passageway, a filtered-air plenum chamber in fluid communication with the inlet of the blower assembly, a filter member adjacent to, and in fluid communication with the filtered-air plenum chamber, and a contaminated-air plenum chamber adjacent to, and in fluid communication with the filter member and in fluid communication with a contaminated-air inlet.

Inventors:
AUSEN, David L., (3M Center, Post Office Box 33427Saint Paul, Minnesota, 55133-3427, US)
Application Number:
US2011/030518
Publication Date:
October 13, 2011
Filing Date:
March 30, 2011
Export Citation:
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Assignee:
3M INNOVATIVE PROPERTIES COMPANY (3M Center, Post Office Box 33427Saint Paul, Minnesota, 55133-3427, US)
AUSEN, David L., (3M Center, Post Office Box 33427Saint Paul, Minnesota, 55133-3427, US)
International Classes:
A62B18/04; A62B7/10; A62B18/08; A62B23/02
Foreign References:
US20070044800A12007-03-01
US20020104153A12002-08-08
US5577495A1996-11-26
US5113853A1992-05-19
Attorney, Agent or Firm:
OLOFSON, Jeffrey M., et al. (3M Center Office of Intellectual Property Counsel Post Office Box 33427, Saint Paul, Minnesota, 55133-3427, US)
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