Patents
US 12461127 B2: Non-contact DC current measurement device with open loop degaussing
- Granted
- 2025-11-04
- Filed
- 2023-04-14 application 18301079
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
Systems, apparatus, and methods that provide a flexible current sensor capable of measuring current flowing through a conductor without contacting the conductor. In various implementations, a flexible current sensor may have a comparable size, shape, and appearance as a flexible loop of a Rogowski coil, except the current sensor described herein can sense direct current (DC). The current sensors of the present disclosure utilize a novel open loop degaussing mechanism to provide accurate DC current measurements in a conductor. To achieve this, a current sensor includes an AC degaussing coil wrapped around a magnetic core. A driver circuit drives an AC degaussing signal in the AC degaussing core, which operates to reset or degauss the magnetic core, thereby providing more accurate current measurements.
Source: PVGPATDIS, file of 2026-04-10 (ipg251104.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| Fluke Corporation 660 patents | US company or organization | Everett, WA | FLUKE CORPORATION State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Bryanna D. Raap | Everett, WA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Matt Moran | Everett, WA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Nicholas W. Dinsmore | Everett, WA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Joshua Zoellick | Mukilteo, WA | 1 | PVGPATDIS, file of 2026-04-10 | |
| Paul A. Ringsrud | Langley, WA | 7 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| G01R | Measuring electric variables; measuring magnetic variables | G01R15/181 | 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 |
|---|---|---|---|---|---|
| 2023-10-05 | Assignment Assignment of assignor's interest | DINSMORE, NICHOLAS W. signed 2023-04-12 MORAN, MATT signed 2023-04-12 RAAP, BRYANNA D. signed 2023-04-12 RINGSRUD, PAUL A. signed 2023-04-12 ZOELLICK, JOSHUA signed 2023-04-12 | FLUKE CORPORATION EVERETT, WA | 65138/250 | 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.