US 12,326,153 B2
Self cleaning cutter, cutting assembly, and pump
Donald M. Pohler, North Chili, NY (US)
Assigned to Liberty Pumps, Inc., Bergen, NY (US)
Filed by Liberty Pumps, Inc., Bergen, NY (US)
Filed on Nov. 2, 2023, as Appl. No. 18/386,313.
Prior Publication US 2025/0146505 A1, May 8, 2025
Int. Cl. F04D 29/22 (2006.01); F04D 7/04 (2006.01)
CPC F04D 29/2288 (2013.01) 15 Claims
OG exemplary drawing
 
9. A rotatable cutter engageable with a rotating drive shaft and comprised of:
a) a first cutting blade and a second cutting blade, each of the first and the second cutting blades comprising a distal region, and each of the first and the second cutting blades extending radially outwardly from an axis of rotation of the rotating drive shaft to a distal end;
b) a single protruding nub extending axially outwardly from the distal region of one of the first and second cutting blades and including a radially outermost edge terminating short of the distal end of that one of the first and second cutting blades.