Patents
US 12016991 B2: System and method for improving battery life of portable negative-pressure therapy through hysteresis control
- Granted
- 2024-06-25
- Filed
- 2018-02-08 application 16484635
- Type
- Utility · 56 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A system comprises a negative-pressure source including a pump and an electric motor for maintaining negative-pressure at the wound and a pressure sensor for sensing a wound site pressure (WP). The system further comprises a system controller coupled to the first pressure sensor and the electric motor. The system controller maintains the wound site pressure (WP) within a hysteresis band by the application of power to the electric motor from a battery power source, based upon, at least in part a flow rate (FR) of fluid between the pump and the wound site as determined by the system controller. The hysteresis band including a maximum wound site pressure (WPMax) and a minimum wound site pressure (WPMin).
Source: PVGPATDIS, file of 2026-04-10 (ipg240625.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| KCI Licensing, Inc. 911 patents | US company or organization | San Antonio, TX | TX:32096292969 State business registration EXACT high confidence: identical full name and state | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Richard Daniel John Coulthard | Verwood, GB | 114 | PVGPATDIS, file of 2026-04-10 | |
| Christopher Brian Locke | Bournemouth, GB | 580 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| A61M | Devices for introducing media into, or onto, the body ; devices for transducing body media or for taking media from the body ; devices for producing or ending sleep or stupor | A61M1/73 | 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 |
|---|---|---|---|---|---|
| 2024-02-01 | Assignment Assignment of assignor's interest | 3M INNOVATIVE PROPERTIES COMPANY signed 2024-02-01 | SOLVENTUM INTELLECTUAL PROPERTIES COMPANY MAPLEWOOD, MN | 66436/225 | PASDL, file of 2026-10-15 |
| 2023-08-28 | Assignment Assignment of assignor's interest | KCI LICENSING, INC. signed 2023-08-24 | 3M INNOVATIVE PROPERTIES COMPANY ST. PAUL, MN | 64730/636 | PASDL, file of 2026-10-15 |
| 2022-03-11 | Assignment Assignment of assignor's interest | LOCKE, CHRISTOPHER B. signed 2021-05-12 | KCI LICENSING, INC. SAN ANTONIO, TX | 59235/604 | 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.