US Patent 11365738 Reversing grinder pump

A reversible grinder pump with cutter plate and cutter blade, wherein the cutter plate is attached to an inlet of the reversible grinder pump and is located adjacent to the cutter blade, wherein the cutter plate includes pairs of angled openings, wherein each of the pair of angled openings extends through the cutter plate and has a shape which is a mirror image of the other angled opening of the pair of angled openings, when viewed from above a surface of the cutter plate. The cutter blade of the reversible grinder pump contains a pair of triangular cross section, prism-shaped cutting edges, which are congruent to each other and reflective, extending in opposite directions from each other.