Patents
US 11193605 B1: Hot water recirculation valve
- Granted
- 2021-12-07
- Filed
- 2019-06-04 application 16430925
- Type
- Utility · 10 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A recirculation valve for use with a tankless water heater in a system that includes hot and cold water fixtures and a cold water supply. The recirculation valve includes a valve body having an inlet connection, a pair of outlet connections and an internal chamber; a thermostatic element that is disposed in a first portion of the internal chamber of the valve body and includes an actuation body that is responsive to water temperature; wherein the valve body further has a port opening that is disposed between the thermostatic element and a second portion of the internal chamber; wherein the thermostatic element further includes a piston constructed and arranged to operatively extend from said actuation body when the actuation body is heated, and a plunger that is carried by and is moveably responsive to the actuation body; and whereby, when the actuation body is heated, the valve transitions from an open position to a closed position by the piston moving the actuation body and plunger so that the plunger moves to seal against the port opening of the valve body.
Source: PVGPATDIS, file of 2026-04-10 (ipg211207.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| AquaMotion, Inc. 16 patents | US company or organization | Barrington, RI | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Hans L. Kuster | Barrington, RI | 16 | PVGPATDIS, file of 2026-04-10 | |
| Michael McNamara | West Greenwich, RI | 14 | PVGPATDIS, file of 2026-04-10 | |
| John Papa | East Greenwich, RI | 3 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F16K | Valves; taps; cocks; actuating-floats; devices for venting or aerating | F16K31/002 | PVGPATDIS, file of 2026-04-10 |
| F24D | Domestic- or space-heating systems, e.g. central heating systems; domestic hot-water supply systems; elements or components therefor | F24D17/0078 | PVGPATDIS, file of 2026-04-10 |
| G05D | Systems for controlling or regulating non-electric variables | G05D23/02 | 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 |
|---|---|---|---|---|---|
| 2019-06-04 | Assignment Assignment of assignor's interest | KUSTER, HANS L. signed 2019-05-30 MCNAMARA, MICHAEL signed 2019-05-30 PAPA, JOHN signed 2019-05-30 | AQUAMOTION, INC. BARRINGTON, RI | 49361/778 | 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.