Patents
US 8202058 B2: Variable displacement piston machine with a sensor
- Granted
- 2012-06-19
- Filed
- 2009-07-15 application 12503201
- Type
- Utility · 14 claims
- Elsewhere
- Google Patents ↗ · USPTO patent document ↗ · USPTO Patent Center record ↗
Abstract
A variable displacement axial piston machine. The variable displacement axial piston machine includes a cylinder block with at least one main cylinder and main piston, a swash plate, a plunger arrangement with a plunger and auxiliary cylinder, and a sensor. The swash plate is arranged to effect movement of the main piston in the main cylinder upon rotation of the swash plate relative to the cylinder arrangement. The plunger is arranged to tilt the swash plate relative to the cylinder arrangement and to control a stroke of the main cylinder in the main piston. To provide a simple and reliable measurement of displacement of the main piston in the main cylinder, the invention provides a sensor element which is fixed in the auxiliary cylinder and which is adapted to sense movement of the plunger therein.
Source: PVGPATDIS, file of 2026-04-10 (ipg120619.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 |
|---|---|---|---|---|
| Per Nielsen Lindholdt | Skanderborg, DK | 4 | PVGPATDIS, file of 2026-04-10 | |
| Dietmar Weiss | Aabenraa, DK | 2 | PVGPATDIS, file of 2026-04-10 |
CPC categories
| Subclass | Category | First group | Source |
|---|---|---|---|
| F04B | Positive-displacement machines for liquids; pumps | F04B49/12 | PVGPATDIS, file of 2026-04-10 |
| F01B | Machines or engines, in general or of positive-displacement type, e.g. steam engines | F01B3/0044 | 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 |
| 2009-08-25 | Assignment Assignment of assignor's interest | LINDHOLDT, PER NIELSEN signed 2009-08-04 WEISS, DIETMAR W. signed 2009-08-04 | SAUER-DANFOSS INC. AMES, IA | 23143/475 | 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.