Patents
US 12278531 B2: Vacuum pressure impregnation method for insulation system
- Granted
- 2025-04-15
- Filed
- 2022-04-11 application 17717630
- Type
- Utility · 17 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A vacuum pressure impregnation process includes placing a room temperature coil/winding into a pressure vessel with a camera aimed at the coil/winding for inspection, and sealing the pressure vessel to draw a first vacuum level, maintained for a first duration. The coil/winding is flooded with resin and remotely monitored. A second vacuum level is maintained for a second duration while remotely monitoring. A first positive pressure level is applied for a third duration while remotely monitoring, before releasing and drawing a third vacuum level, maintained for a fourth duration while remotely monitoring. A second positive pressure level is applied for a fifth duration while remotely monitoring, before releasing pressure and removing the coil/winding from the pressure vessel.
Source: PVGPATDIS, file of 2026-04-10 (ipg250415.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| THE TIMKEN COMPANY 94 patents | US company or organization | North Canton, OH | THE TIMKEN COMPANY State business registration EXACT high confidence: identical full name and state THE TIMKEN COMPANY Federal lobbying client EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Jan de Swardt | Mount Homer, FL | 7 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| H02K | Dynamo-electric machines | H02K15/12 | 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 |
|---|---|---|---|---|---|
| 2026-01-27 | Assignment Assignment of assignor's interest | THE TIMKEN COMPANY signed 2026-01-27 | TIMKEN GEARS & SERVICES INC. KING OF PRUSSIA, PA | 73601/815 | PASDL, file of 2026-10-15 |
| 2022-04-11 | Assignment Assignment of assignor's interest | DE SWARDT, JAN signed 2021-05-14 | THE TIMKEN COMPANY NORTH CANTON, OH | 59561/849 | 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.