Patents
US 12496645 B1: Pipe slitter
- Granted
- 2025-12-16
- Filed
- 2023-08-30 application 18458496
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A pipe slitter assembly for lead pipe. The slitter assembly is configured to be pulled by a cable which is disposed through several of the various components of the assembly. At the lead of the assembly is a slitter, having one and only one blade. The blade has an edge which is oriented at a right angle to the longitudinal axis of the cable. The edge is created by two adjoining walls meeting at an included angle of about 21 degrees. Behind the blade may be various adaptors, and an expander. The expander opens the slit pipe, such that a pipe puller may be used to pull a replacement pipe into the void created by the slitter assembly. The slit pipe may be removed, or left in the subsurface around the newly introduced replacement pipe.
Source: PVGPATDIS, file of 2026-04-10 (ipg251216.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| The Charles Machines Works, Inc. 255 patents | US company or organization | Perry, OK | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Walter George Thompson | Janesville, WI | 7 | PVGPATDIS, file of 2026-04-10 | |
| Mark D. Randa | Oconomowoc, WI | 23 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B23D | Planing; slotting; shearing; broaching; sawing; filing; scraping; like operations for working metal by removing material, not otherwise provided for | B23D21/02 | PVGPATDIS, file of 2026-04-10 |
| F16L | Pipes; joints or fittings for pipes; supports for pipes, cables or protective tubing; means for thermal insulation in general | F16L1/038 | 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 |
|---|---|---|---|---|---|
| 2023-10-12 | Assignment Assignment of assignor's interest | RANDA, MARK D. signed 2023-09-15 THOMPSON, WALTER GEORGE signed 2023-09-15 | THE CHARLES MACHINE WORKS, INC. PERRY, OK | 65202/274 | 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.