US 12,213,490 B2
Grinder assembly
James B. Wolff, Portland, OR (US)
Assigned to Formtec, LLC, Plymouth, WI (US); and Spherical IP, LLC, Tualatin, OR (US)
Filed by James B. Wolff, Portland, OR (US)
Filed on Jan. 13, 2014, as Appl. No. 13/999,099.
Prior Publication US 2015/0196038 A1, Jul. 16, 2015
This patent is subject to a terminal disclaimer.
Int. Cl. A22C 17/02 (2006.01); A22C 17/00 (2006.01); B02C 18/30 (2006.01); B02C 18/36 (2006.01)
CPC A22C 17/0026 (2013.01) [B02C 18/302 (2013.01); B02C 18/365 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A grinding machine comprising:
a grinder portion;
a feed screw or auger to advance material in the hopper through said head;
independent speed control blades attached to a motor that is independent from said feed screw or said auger;
said motor providing variable speed control;
an orifice plate;
said orifice plate having said independent speed control blades on outside of said orifice plate;
a collection cone located downstream of said orifice plate;
said orifice plate comprised of a plurality of grinding apertures and at least one collection passage;
geometry of each of said grinding apertures create a venturi effect;
said apertures have a diameter such that ratio of diameter of sphere in said orifice plate to diameter of cylinder of said orifice plate is approximately 1.1 to 2.5.