Patents
US 8360096 B2: Low pressure rise rate pilot operated poppet relief valve
- Granted
- 2013-01-29
- Filed
- 2007-08-15 application 11839012
- Type
- Utility · 13 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A relief valve for a hydraulic machine that combines a poppet valve assembly and a pilot valve assembly together using a connector pin wherein internal fluid passageways within the poppet and pilot spools provide a fluid flow path between the inlet of the valve and a cavity disposed between the poppet and pilot. As a result of the internal passageways fluid is metered to the interior cavity to provide additional control and stability within the relief valve.
Source: PVGPATDIS, file of 2026-04-10 (ipg130129.xml).
Assignees
| Assignee | Type | Place | Also on furp.org | Source |
|---|---|---|---|---|
| SAUER-DANFOSS INC. 39 patents | US company or organization | Ames, IA | SAUER DANFOSS INC SEC filer EXACT medium confidence: identical full name, one of each nationally | PVGPATDIS, file of 2026-04-10 |
Inventors
| Inventor | Place | Patents | Person page | Source |
|---|---|---|---|---|
| Dennis O. Courtright | Easley, SC | 2 | PVGPATDIS, file of 2026-04-10 | |
| Enzo Soncini | Reggio nell'Emilia, IT | 2 | PVGPATDIS, file of 2026-04-10 | |
| Davide I. Davoli | Reggio nell'Emilia, IT | 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 | F16K15/044 | PVGPATDIS, file of 2026-04-10 |
| Y10T | Technical subjects covered by former us classification | Y10T137/7758 | 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 |
|---|---|---|---|---|---|
| 2014-04-09 | Name change Change of name | SAUER-DANFOSS INC. signed 2013-09-17 | DANFOSS POWER SOLUTIONS INC. AMES, IA | 32641/351 | ECORSEXC, file of 2026-09-25 |
| 2007-08-15 | Assignment Assignment of assignor's interest | COURTRIGHT, DENNIS O. signed 2007-07-12 DAVOLI, DAVIDE I. signed 2007-07-17 SONCINI, ENZO signed 2007-07-17 | SAUER-DANFOSS INC. AMES, IA | 19696/541 | 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.