US 11,883,693 B2
Modular, integrated powered air purifying respirator system
Greg A. Tilley, Monkton, MD (US); and Brian Curlee, Joppa, MD (US)
Assigned to D. Wheatley Enterprises, Inc., Belcamp, MD (US)
Filed by D. Wheatley Enterprises, Inc., Belcamp, MD (US)
Filed on Aug. 20, 2020, as Appl. No. 16/998,413.
Claims priority of provisional application 62/889,263, filed on Aug. 20, 2019.
Prior Publication US 2021/0052921 A1, Feb. 25, 2021
Int. Cl. A62B 7/10 (2006.01); A62B 23/02 (2006.01); A62B 7/12 (2006.01); A62B 18/00 (2006.01)
CPC A62B 7/10 (2013.01) [A62B 7/12 (2013.01); A62B 18/006 (2013.01); A62B 23/02 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A powered air purifying respirator (“PAPA”) assembly, comprising:
a blower unit having an air inlet and an air outlet configured for removable connection to a hose system for delivery of cleaned air to a user;
a filter rail chassis having a first closed end and a second open end and removably attached to said air inlet of said blower unit at said second open end of said filter rail chassis, said filter rail chassis having at least one chassis inlet configured to removably and sealingly receive a filter canister; and
a portable power assembly removably attached to said blower unit, said portable power assembly having a bottom face that is aligned with a bottom face of the blower unit, said portable power assembly extending distally from a front face of the blower unit to a point adjacent to a portion of the filter rail chassis, and said portable power assembly having a top face at least a portion of which is positioned lower than a top of said at least one chassis inlet.