US 12,214,309 B2
Passive dust filter for an inspection hatch
Robert Huskisson, Oconomowoc, WI (US)
Assigned to Benetech, Inc., Aurora, IL (US)
Filed by Benetech, Inc., Aurora, IL (US)
Filed on Apr. 6, 2022, as Appl. No. 17/714,273.
Claims priority of provisional application 63/171,354, filed on Apr. 6, 2021.
Claims priority of provisional application 63/171,338, filed on Apr. 6, 2021.
Prior Publication US 2022/0314157 A1, Oct. 6, 2022
Int. Cl. B01D 53/22 (2006.01); B01D 46/00 (2022.01); B01D 46/04 (2006.01); B01D 46/24 (2006.01); B01D 46/44 (2006.01); B01D 46/52 (2006.01); B01D 46/58 (2022.01); B01D 46/71 (2022.01); B01D 47/06 (2006.01); B01D 50/60 (2022.01)
CPC B01D 46/71 (2022.01) [B01D 46/0005 (2013.01); B01D 46/0049 (2013.01); B01D 46/0086 (2013.01); B01D 46/04 (2013.01); B01D 46/24 (2013.01); B01D 46/442 (2013.01); B01D 46/521 (2013.01); B01D 46/58 (2022.01); B01D 47/06 (2013.01); B01D 46/2411 (2013.01); B01D 50/60 (2022.01); B01D 2273/30 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A passive dust filtering system for an inspection hatch comprising:
a filter containment unit;
an adapter section connected to the filter containment unit for attaching the filter containment unit to a hatch of a bulk storage vessel;
a plurality of filter elements supported in the filter containment unit; and,
an air purge system in the filter containment unit for removing dust from an outer surface of the filter elements.