US 12,214,359 B1
Colloid mill
Matthew D. Eggert, Sauk City, WI (US); and Duane D. Ehlke, Waunakee, WI (US)
Assigned to Fristam Pumps USA Limited Partnership, Middleton, WI (US)
Filed by Fristam Pumps USA Limited Partnership, Middleton, WI (US)
Filed on Mar. 16, 2022, as Appl. No. 17/696,398.
Int. Cl. B02C 2/00 (2006.01); B02C 7/02 (2006.01); B02C 7/14 (2006.01); B02C 7/175 (2006.01); B02C 23/18 (2006.01); D21D 1/30 (2006.01); B02C 7/18 (2006.01); D21D 1/34 (2006.01)
CPC B02C 2/00 (2013.01) [B02C 7/02 (2013.01); B02C 7/175 (2013.01); B02C 23/18 (2013.01); D21D 1/30 (2013.01); B02C 7/14 (2013.01); B02C 7/186 (2013.01); D21D 1/34 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A colloid mill including:
a. a rotor having a tapered outer rotor surface,
b. a rotor shaft extending from the rotor,
c. a seal situated about the rotor shaft,
d. a seal channel bounded by the seal and the rotor shaft,
e. a stator having a tapered inner stator surface wherein the rotor is situated,
f. a casing situated about the stator and rotor, the casing having a fluid inlet and a fluid outlet,
g. a stator channel bounded by the casing and the stator, the stator channel being in fluid communication with the seal channel,
h. a mill buffer inlet and a mill buffer outlet, each being in fluid communication with a respective one of the seal channel and the stator channel, whereby buffer urged into the mill buffer inlet flows through the seal channel and the stator channel to the mill buffer outlet,
wherein:
(1) protrusions extend from one or more of the outer rotor surface and the inner stator surface,
(2) the stator is movable within the casing with respect to the rotor, such movement altering the spacing between the outer rotor surface and the inner stator surface,
(3) a fluid shear path is defined within the casing:
(a) between the fluid inlet and the fluid outlet, and
(b) between the outer rotor surface and the inner stator surface.