US 12,311,205 B2
Modular powered air purifying respirator system
Sean Springer, Crofton, MD (US); Daren Olsen, New Market, MD (US); and Steve Tourison, Glen Burnie, MD (US)
Assigned to Immediate Response Technologies, LLC, Jessup, MD (US)
Filed by Immediate Response Technologies, LLC, Jessup, MD (US)
Filed on Apr. 5, 2022, as Appl. No. 17/714,063.
Application 17/714,063 is a continuation of application No. 16/190,415, filed on Nov. 14, 2018, granted, now 11,291,869.
Claims priority of provisional application 62/586,393, filed on Nov. 15, 2017.
Prior Publication US 2022/0331621 A1, Oct. 20, 2022
Int. Cl. A62B 18/02 (2006.01); A62B 18/00 (2006.01); A62B 18/10 (2006.01); F04D 27/00 (2006.01); G05D 7/06 (2006.01); A62B 7/02 (2006.01); A62B 7/10 (2006.01); A62B 9/00 (2006.01)
CPC A62B 18/02 (2013.01) [A62B 18/006 (2013.01); A62B 18/10 (2013.01); F04D 27/004 (2013.01); G05D 7/0676 (2013.01); A62B 7/02 (2013.01); A62B 7/10 (2013.01); A62B 9/006 (2013.01); F05D 2270/335 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A powered air purifying respirator (PAPR), comprising:
a control module including a power source;
an ambient gas module including a first housing and a first inlet configured to receive an ambient gas;
a gas filter in fluid communication with the first inlet and configured to filter the ambient gas;
a blower configured to boost at least one of a flow rate or a pressure of the ambient gas entering and/or exiting the gas filter;
a non-ambient gas module including a second housing and a second inlet that is independent from the first inlet and configured to receive a non-ambient gas;
a first outlet configured to selectively provide a breathing gas to a user from at least one of the ambient gas or the non-ambient gas; and
a switching device configured to select between the first inlet and the second inlet as a source of the breathing gas,
wherein the gas filter, the ambient gas module, the non-ambient gas module, and the control module are configured to be joined together in an integral unit, and
wherein the respirator is modular and configured to be operable in a plurality of different assemblies including a combination ambient and non-ambient gas assembly in which the non-ambient gas module is mounted between the control module and the ambient gas module with the non-ambient gas module configured to selectively provide fluid communication between the control module and the ambient gas module, and an ambient gas-only assembly in which the non-ambient gas module is entirely removed from the integral unit and the ambient gas module is attached directly to the control module in place of the non-ambient gas module.