Patents
US 12359809 B2: Back lit temperature knob
- Granted
- 2025-07-15
- Filed
- 2022-06-09 application 17836085
- Type
- Utility · 17 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A backlit temperature control knob for water heater valves used with water heaters and more particularly to gas water heaters provides a way to read the temperature indication not previously known in the art. Some embodiments rely on a thermocouple or thermopile normally used to power a safety magnet with the pilot light system as a source of electrical energy to selectively illuminate a Light Emitting Diode (LED) which directs light through at least a portion of the knob to assist in reading the temperature indications.
Source: PVGPATDIS, file of 2026-04-10 (ipg250715.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| ROBERTSHAW CONTROLS PRIVATE LIMITED 69 patents | Foreign company or organization | Itasca, IL | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| James E. Pearson | Itasca, IL | 21 | PVGPATDIS, file of 2026-04-10 | |
| Timothy M. Wright | Itasca, IL | 8 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F23N | Regulating or controlling combustion | F23N1/087 | PVGPATDIS, file of 2026-04-10 |
| F21V | Functional features or details of lighting devices or systems thereof; structural combinations of lighting devices with other articles, not otherwise provided for | F21V33/006 | PVGPATDIS, file of 2026-04-10 |
| F24H | Fluid heaters, e.g. water or air heaters, having heat-generating means, e.g. heat pumps, in general | F24H9/20 | PVGPATDIS, file of 2026-04-10 |
| G05G | Control devices or systems insofar as characterised by mechanical features only | G05G1/105 | 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 |
|---|---|---|---|---|---|
| 2025-05-09 | Assignment Assignment of assignor's interest | PEARSON, JAMES E. signed 2022-06-07 WRIGHT, TIMOTHY M. signed 2022-06-07 | ROBERTSHAW CONTROLS COMPANY ITASCA, IL | 71070/354 | 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.