Patents
US 12686477 B1: Magnetohydrodynamic pump
- Granted
- 2026-07-21
- Filed
- 2024-02-09 application 18438340
- Type
- Utility · 22 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A magnetohydrodynamic (MHD) device including an electrochemical cell, an aqueous liquid, and a magnet is provided. The electrochemical cell includes a first and a second electrode and an enclosed gas volume fluidly connecting the two electrodes. The first electrode generates a reaction gas at a first rate, the second electrode consumes the reaction gas at a second rate, the first rate being substantially equal to the second rate. The aqueous liquid is between the first electrode and the second electrode and includes a current having a direction. The magnet generates a magnetic field having a direction normal to the direction of the current. The MHD device produces a propulsive force having a direction simultaneously normal to the direction of the magnetic field and the direction of the current.
Source: PTBLXML, file of 2026-07-21 (ipgb20260721.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| HRL LABORATORIES, LLC 1,601 patents | US company or organization | Malibu, CA | PTBLXML, file of 2026-07-21 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Jason A. Graetz | Calabasas, CA | 41 | PTBLXML, file of 2026-07-21 | |
| John J. Vajo | West Hills, CA | 65 | PTBLXML, file of 2026-07-21 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| B63H | Marine propulsion or steering | B63H11/025 | PTBLXML, file of 2026-07-21 |
| H02K | Dynamo-electric machines | H02K44/02 | PTBLXML, file of 2026-07-21 |
| B63G | Offensive or defensive arrangements on vessels; mine-laying; mine-sweeping; submarines; aircraft carriers | B63G2008/004 | PTBLXML, file of 2026-07-21 |
Cooperative Patent Classification, as currently assigned (one row per subclass).
Assignments and security interests
| Recorded | What | From | To | Reel/frame | Source |
|---|---|---|---|---|---|
| 2024-02-23 | Assignment Assignment of assignor's interest | GRAETZ, JASON A. signed 2024-02-01 VAJO, JOHN J. signed 2024-02-02 | HRL LABORATORIES, LLC MALIBU, CA | 66539/380 | PASDL, file of 2026-08-13 |
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.