US 12,280,327 B2
Vacuum filter assembly for cleansing air for use in transfer of bulk, granular material as in conveying vehicles
David E. Sisk, Bonne Terre, MO (US); Peter Kemp, Crestwood, MO (US); Roger Breakfield, Farmington, MO (US); Andrew Boyer, Bonne Terre, MO (US); and Travis Kinneman, Fredericktown, MO (US)
Assigned to BULK TANK, INC., Park Hills, MO (US)
Filed by BULK TANK, INC., Park Hills, MO (US)
Filed on May 28, 2022, as Appl. No. 17/803,366.
Application 17/803,366 is a continuation in part of application No. 17/300,958, filed on Dec. 22, 2021, abandoned.
Application 17/803,366 is a continuation in part of application No. 17/300,841, filed on Nov. 22, 2021, abandoned.
Application 17/803,366 is a continuation in part of application No. 17/300,841, filed on Nov. 22, 2021, abandoned.
Application 17/300,841 is a continuation in part of application No. 16/873,236, filed on Mar. 2, 2020, granted, now 12,005,551.
Claims priority of provisional application 63/205,694, filed on Jan. 4, 2021.
Claims priority of provisional application 63/259,241, filed on Jun. 29, 2021.
Claims priority of provisional application 63/205,346, filed on Dec. 3, 2020.
Claims priority of provisional application 62/919,379, filed on Mar. 7, 2019.
Prior Publication US 2022/0305418 A1, Sep. 29, 2022
Int. Cl. B01D 46/00 (2022.01); B01D 46/02 (2006.01)
CPC B01D 46/02 (2013.01) [B01D 46/0004 (2013.01); B01D 2273/28 (2013.01)] 15 Claims
OG exemplary drawing
 
11. A vacuum filter assembly comprising:
a filter canister, the filter canister having a top of the filter canister and a bottom of the filter canister;
a dusty air inlet on the filter canister at the bottom of the filter canister;
a clean air outlet on the filter canister at the top of the filter canister;
a dust filtering system in the filter canister, the dust filtering system comprising a tube sheet traversing an upper segment of the filter canister and at least one filtration tube suspended from the tube sheet and extending downward into the filter canister;
a blower assembly;
a vacuum connection connecting the clean air outlet on the filter canister with the blower assembly, the blower assembly being operable to create a vacuum that is communicated through the vacuum connection and the clean air outlet on the filter canister to an interior of the filter canister to draw dust laden air through the dusty air inlet on the filter canister into the bottom of the filter canister and through the at least one filtration tube of the dust filtering system cleaning the air in response to operation of the blower assembly; and
a back flush valve communicating with the vacuum connection and the clean air outlet on the filter canister, the back flush valve being operable to open and communicate an air flow in an opposite direction through the clean air outlet and the at least one filtration tube of the dust filtering system to unclog dust from the at least one filtration tube.