US 11,808,240 B2
Air filter including a scavenging system
Samuel Koeger, Zikhron Yaaqov (IL); and Jonathan Schneider, Zikhron Yaaqov (IL)
Assigned to BETH-EL ZIKHRON YAAQOV INDUSTRIES LTD., Zikhron Yaaqov (IL)
Appl. No. 16/959,316
Filed by BETH-EL ZIKHRON YAAQOV INDUSTRIES LTD., Zikhron Yaaqov (IL)
PCT Filed Jan. 3, 2019, PCT No. PCT/IL2019/050020
§ 371(c)(1), (2) Date Jun. 30, 2020,
PCT Pub. No. WO2019/150356, PCT Pub. Date Aug. 8, 2019.
Claims priority of application No. 257321 (IL), filed on Feb. 3, 2018.
Prior Publication US 2020/0368664 A1, Nov. 26, 2020
Int. Cl. F02M 35/022 (2006.01); F02M 35/024 (2006.01); F02M 35/08 (2006.01); B01D 45/16 (2006.01); B01D 46/52 (2006.01); F02M 35/02 (2006.01); B01D 50/20 (2022.01); B01D 46/00 (2022.01); B01D 46/10 (2006.01); B01D 46/71 (2022.01)
CPC F02M 35/0216 (2013.01) [B01D 46/521 (2013.01); B01D 50/20 (2022.01); F02M 35/0201 (2013.01); F02M 35/024 (2013.01); F02M 35/0223 (2013.01); F02M 35/08 (2013.01); F02M 35/086 (2013.01); B01D 46/0005 (2013.01); B01D 46/10 (2013.01); B01D 46/71 (2022.01); B01D 2279/60 (2013.01)] 10 Claims
OG exemplary drawing
 
1. An air filter for heavy dust conditions comprising:
a housing;
a precleaner;
a permeable filter;
a pulse jet back-flow flush system operative on said permeable filter; and
a scavenger system, said scavenger system disposes of particles collected at said precleaner through a collecting gap of said precleaner and an upper duct, and disposes of particles collected on the upstream surface of said permeable filter through perforations made to a bottom wall of said housing, a collecting channel running longitudinally under said perforations and a lower duct, wherein:
said scavenger system comprising an air suction source and a three way valve, and
said three way valve is airflow coupled to said upper duct, said lower duct and said air suction source, said three way valve enables scavenging of said precleaner and said permeable filter alternately.