Self cleaning cutter, cutting assembly, and pump
AssigneeLiberty Pumps, Inc.
InventorDonald M. POHLER
Life of this patent
Estimating the term…
Abstract
A rotatable cutter, which may be used in a cutting assembly and in a grinder pump, is provided comprising at least a first cutting blade and a second cutting blade. Each of the first and the second cutting blades include a central region and a distal region. A protruding nub extends axially outwardly from the distal region of at least one of the first and second cutting blades. The rotatable cutter is engageable with a rotating drive shaft, which may also be engaged with an impeller of the pump.
Claims19
(canceled)
The rotatable cutter of claim 16, wherein the single protruding nub is of a cylindrical shape.
The rotatable cutter of claim 16, wherein the single protruding nub is of an oblong shape.
The rotatable cutter of claim 16, wherein the single protruding nub is of a curvilinear shape.
A cutting assembly comprising:
- a) a rotatable drive shaft;
- b) a rotatable cutter engaged with the rotatable drive shaft and comprised of at least a first cutting blade and a second cutting blade, each of the first and the second cutting blades including a planar inner surface coplanar with each other, a central region and a distal region, the rotatable cutter further comprised of 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;
- and
- c) a plate cutter comprised of an outer cutter surface contiguous with the planar inner surfaces of the blades of the rotatable cutter.
A grinder pump comprising a pump volute enclosing a pump impeller, and a cutting assembly for size reduction of solids in a liquid to be pumped, the cutting assembly comprising:
- a) a rotatable drive shaft;
- b) a rotatable cutter engaged with the rotatable drive shaft and comprised of at least a first cutting blade and a second cutting blade, each of the first and the second cutting blades including a planar inner surface coplanar with each other, a central region and a distal region, the rotatable cutter further comprised of 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;
- and
- c) a plate cutter comprised of an outer cutter surface contiguous with the planar inner surfaces of the blades of the rotatable cutter.
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.
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Dependencies are inferred from the claim text.