US 11,839,778 B2
Modular NBC filtration system for protection shelters
Samuel Koeger, Zikhron Yaaqov (IL); and Jonathan Schneider, Zikhron Yaaqov (IL)
Assigned to BETH-EL ZIKHRON YAAQOV INDUSTRIES LTD., Zikron Yaaqov (IL)
Appl. No. 17/287,288
Filed by BETH-EL ZIKHRON YAAQOV INDUSTRIES LTD., Zikhron Yaaqov (IL)
PCT Filed Apr. 1, 2019, PCT No. PCT/IL2019/050376
§ 371(c)(1), (2) Date Apr. 21, 2021,
PCT Pub. No. WO2020/100132, PCT Pub. Date May 22, 2020.
Claims priority of application No. 262997 (IL), filed on Nov. 13, 2018.
Prior Publication US 2021/0393994 A1, Dec. 23, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. B01D 46/00 (2022.01); A62B 13/00 (2006.01); F24F 8/10 (2021.01); F24F 7/003 (2021.01); A62B 23/04 (2006.01); B01D 46/10 (2006.01); B01D 46/42 (2006.01); B01D 46/44 (2006.01); B01D 53/04 (2006.01)
CPC A62B 13/00 (2013.01) [A62B 23/04 (2013.01); B01D 46/0005 (2013.01); B01D 46/0036 (2013.01); B01D 46/0049 (2013.01); B01D 46/0087 (2013.01); B01D 46/10 (2013.01); B01D 46/4245 (2013.01); B01D 46/4272 (2013.01); B01D 46/444 (2013.01); B01D 53/04 (2013.01); F24F 7/003 (2021.01); F24F 8/10 (2021.01); B01D 2273/30 (2013.01); B01D 2279/35 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A modular NBC filtration system for protection shelters comprising:
a) a filter unit elongated in shape, horizontally positioned along a top portion of a wall of the protection shelter, said filter unit is provided with an inlet port and an outlet port located in proximity to each other at a first extremity of said filter unit;
b) a blower driven by an electric motor, said blower is positioned along said filter unit at a second extremity thereof distal from said inlet port and outlet port;
c) a manual air exchange backup unit comprising a plurality of hinged segments serially linked to each other, forming a foldable arm, a first end of said air exchange backup unit is swiveably attached to said electric motor and a second end of said air exchange backup unit carries a detachable hand crank, said air exchange backup unit is selectively folded up at normal times; and
d) a changeover valve, selectively airflow coupling said filter unit and said blower, said changeover valve comprising a tubular housing extending along said filter unit at said first extremity of said filter unit, an internal longitudinally displaceable tubular valve member, and a state selector handle for displacing said tubular valve member thus switching said changeover valve between ventilation and filtration states.