Patents
US 11471893 B2: Grinder accessory for pump
- Granted
- 2022-10-18
- Filed
- 2020-07-02 application 16920087
- Type
- Utility · 22 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A grinder accessory is useful for a pump in a wastewater application. The grinder accessory has a cutter plate and a cutting body that co-act on solids, especially fibriform solids. The cutter plate has first and second planar faces, mounted in an inlet of the pump, with a plurality of through holes and a central aperture. The cutting body is poised atop the first planar face and extends through the central aperture to rotationally couple with a drive shaft of the pump. A central hub of the cutting body has a plurality of arms that extend radially proximate to the first planar face, so that a leading edge of the arms interacts with the through holes on solids passing therethrough. A housing defines a cutting chamber around the cutter plate and the cutting body to protect them and to induce swirling action.
Source: PVGPATDIS, file of 2026-04-10 (ipg221018.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Crane Pumps & Systems, Inc. 7 patents | US company or organization | Piqua, OH | CRANE PUMPS & SYSTEMS INC State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Kirk Neer | Saint Paris, OH | 3 | PVGPATDIS, file of 2026-04-10 | |
| Alex Crabtree | Englewood, OH | 1 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B02C | Crushing, pulverising, or disintegrating in general; milling grain | B02C18/0092 | PVGPATDIS, file of 2026-04-10 |
| F04D | Non-positive-displacement pumps | F04D7/045 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2022-01-10 | Assignment Assignment of assignor's interest | CRANE PUMPS & SYSTEMS, INC. signed 2021-12-15 | CRANE PUMPS & SYSTEMS PFT CORP. PIQUA, OH | 58610/577 | ECORSEXC, file of 2026-09-25 |
| 2020-07-06 | Assignment Assignment of assignor's interest | CRABTREE, ALEX signed 2020-07-01 NEER, KIRK signed 2020-07-01 | CRANE PUMPS & SYSTEMS, INC. PIQUA, OH | 53121/142 | ECORSEXC, file of 2026-09-25 |
Documents recorded with the USPTO Assignment Recordation Branch that list this patent. A security interest is a lender’s claim on the patent as collateral; a release ends it.
USPTO bulk data: PatentsView granted patents, disambiguated (PVGPATDIS) for patents, assignees, inventors, places and CPC categories; the USPTO Patent Assignment Dataset (ECORSEXC) for assignments and security interests. Patents filed in the last 20 years. No claims or full text. Links to other records are by name (and state): EXACT means the identical full name and state; FUZZY means a looser name match, with the confidence shown.