Patents
US 11951484 B2: Hammer for material reducing machines
- Granted
- 2024-04-09
- Filed
- 2019-12-20 application 16724182
- Type
- Utility · 16 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A multi-piece hammer for use in a reducing machine. The multi-piece hammer includes a base to be mounted to the reducing machine, a replaceable tip to be mounted to the base and to impact the material to be reduced, and a retainer to secure the replaceable tip to the base. The replaceable tip has a cavity with a single rail or groove that corresponds to a single groove or rail on the base.
Source: PVGPATDIS, file of 2026-04-10 (ipg240409.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| ESCO GROUP LLC 117 patents | US company or organization | Portland, OR | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Michael B. Roska | Portland, OR | 17 | PVGPATDIS, file of 2026-04-10 | |
| Ty D. Porter | Oregon City, OR | 2 | PVGPATDIS, file of 2026-04-10 | |
| Severn D. Durand | Portland, OR | 11 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B02C | Crushing, pulverising, or disintegrating in general; milling grain | B02C13/04 | 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 |
|---|---|---|---|---|---|
| 2020-04-14 | Assignment Assignment of assignor's interest | PORTER, TY D. signed 2015-06-25 ROSKA, MICHAEL B. signed 2015-07-09 DURAND, SEVERN D. signed 2015-07-10 | ESCO GROUP LLC (FORMERLY ESCO CORPORATION) PORTLAND, OR | 52392/370 | ECORSEXC, file of 2026-09-25 |
| 2020-04-14 | Merger Merger and change of name | ESCO CORPORATION signed 2018-07-11 ESCO GROUP LLC signed 2018-07-11 | ESCO GROUP LLC PORTLAND, OR | 52392/31 | 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.