| CPC B01D 27/08 (2013.01) [B01D 2201/291 (2013.01)] | 14 Claims |
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1. A conduit configured to be a part of at least one of a fluid filter cartridge and a filter cartridge housing, wherein the conduit has a first cylindrical surface defining a first longitudinal axis,
wherein:
the first cylindrical surface has a front-end and a rear-end,
n pins extend from the first cylindrical surface at azimuthal positions ranging from φi to φi+Δφis, ∀i∈{1, 2, . . . , n}, wherein i is a number of a pin of the n pins and Δφis is an azimuthal span of an ith-pin and wherein n is a natural number,
each pin has a forward-facing surface that faces away from the rear-end,
the ith pin and an (i+1)th pin are spaced from each other azimuthally by an azimuthal distance Δφi,i+1d, ∀i≤n−1, wherein the nth-pin is azimuthally neighbored to the first pin,
distances di between forward-facing surfaces of the n pins and a reference plane increase or decrease with respective azimuthal positions φi of corresponding pins by a change of distance Δdi,i+1 from the first pin towards the nth-pin and by a value of −Δdn=(1+α) Σ1=1n=1di from the nth-pin to the first pin, wherein the reference plane is perpendicular to the first longitudinal axis and is either at a front side or at a rear side of all n pins, wherein α∈ {0.25, 0.2, 0.15, 0.1, 0.05, 0.025, 0.01, 0}, and
an absolute value of an azimuthal distance Δφn,1d between the nth-pin and the first pin is greater or equal than the maximum azimuthal distance Δφi,i+1s of any other pair of neighbored pins such that Δφn,1d≥Max({Δφi,i+1d:1≤i<n}).
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