US 12,290,774 B2
Pump filter with predetermined swirl
Mark A. Zaffetti, Suffield, CT (US)
Assigned to HAMILTON SUNDSTRAND CORPORATION, Charlotte, NC (US)
Filed by Hamilton Sundstrand Corporation, Charlotte, NC (US)
Filed on Dec. 8, 2021, as Appl. No. 17/545,103.
Prior Publication US 2023/0173420 A1, Jun. 8, 2023
Int. Cl. B01D 46/00 (2022.01); B01D 46/52 (2006.01); B33Y 80/00 (2015.01)
CPC B01D 46/0001 (2013.01) [B01D 46/0016 (2013.01); B01D 46/52 (2013.01); B01D 2201/30 (2013.01); B01D 2201/31 (2013.01); B33Y 80/00 (2014.12)] 14 Claims
OG exemplary drawing
 
1. A lattice filter for use in an inlet housing of a pump assembly, the lattice filter comprising:
a lattice filter body extending from a filter inlet end to a filter outlet end, the lattice filter having a lattice structure; and
one or more passageways within the lattice filter body,
wherein each of the one or more passageways includes a passageway inlet located at the filter inlet end and a passageway outlet located at the filter outlet end,
wherein each of the one or more passageways extend from the passageway inlet to the passageway outlet;
wherein each of the one or more passageways are a corkscrew passageway formed by a corkscrew wall that spirals around a central longitudinal axis A of the lattice filter body between the passageway inlet and the passageway outlet, the central longitudinal axis extends down a center of the lattice filter body from the filter inlet end to the filter outlet end; and
wherein the corkscrew wall is solid.