Patents
US 10883337 B2: Drain-back valve and method
- Granted
- 2021-01-05
- Filed
- 2019-01-17 application 16250461
- Type
- Utility · 20 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A drain-back valve is provided for draining a submersible pump system in a water well. The drain-back valve includes, for example, a body, an end cap and a plunger assembly. The end cap is inserted into one end of the body includes at least one port that is in fluid communication with an interior passageway of the body. The plunger assembly engages the opposing end of the body. When closed, the plunger assembly prevents water from flowing into the interior passageway of the body. The drain-back valve is activated or opened by dropping a weight into a riser or drop pipe. The weight strikes the plunger assembly and opens the drain-back valve to allow water to flow through the body and out the end cap. This allows well water in the drop or riser pipe to drain back into the water well. With this water drained from the drop or riser pipe, a pump service personnel on the ground surface is able to pull up the pump without the water weight that was in the drop or riser pipe. After servicing and before re-installation back into the well, the drain-back valve is reset to its normally closed position.
Source: PVGPATDIS, file of 2026-04-10 (ipg210105.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| FLOMATIC CORPORATION 11 patents | US company or organization | Glens Falls, NY | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Allan Bo Andersson | Pittstown, NY | 12 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| E21B | Earth or rock drilling; obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells | E21B34/08 | PVGPATDIS, file of 2026-04-10 |
| F04B | Positive-displacement machines for liquids; pumps | F04B53/04 | PVGPATDIS, file of 2026-04-10 |
| F16K | Valves; taps; cocks; actuating-floats; devices for venting or aerating | F16K31/46 | 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 |
|---|---|---|---|---|---|
| 2019-01-17 | Assignment Assignment of assignor's interest | ANDERSSON, ALLAN BO signed 2019-01-15 | FLOMATIC CORPORATION GLENS FALLS, NY | 48050/731 | 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.