Patents
US 12281726 B2: Pipe extraction assisted by pre-stressed strand
- Granted
- 2025-04-22
- Filed
- 2022-07-12 application 17862939
- Type
- Utility · 19 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A machine for extracting a ductile pipe. The machine has a vise which can grip the pipe, and a wire clamp. Each of the wire clamp and vise are supported on a carriage which is movable relative to a frame. This enables the vise to grip and pull the ductile pipe. Additionally, a wire strand may be disposed through the pipe from a far end to the end at which the machine is placed. The wire clamp allows the machine to pre-stress the strand to improve the extraction of the ductile pipe.
Source: PVGPATDIS, file of 2026-04-10 (ipg250422.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 |
|---|---|---|---|---|
| Robert F. Crane | Nekoosa, WI | 31 | PVGPATDIS, file of 2026-04-10 | |
| Mark D. Randa | Oconomowoc, WI | 23 | PVGPATDIS, file of 2026-04-10 | |
| Steven W. Wentworth | Scottsdale, AZ | 24 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F16L | Pipes; joints or fittings for pipes; supports for pipes, cables or protective tubing; means for thermal insulation in general | F16L1/028 | PVGPATDIS, file of 2026-04-10 |
| B66D | Capstans; winches; tackles, e.g. pulley blocks; hoists | B66D3/006 | PVGPATDIS, file of 2026-04-10 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
No recorded assignments or security interests on file for this patent.
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.