Mannesmann Rexroth AG
288Patents
0Active
288Granted
42Portfolio score
Filing activity: Dec 3, 1980 → Nov 20, 2001
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4548233A | Electrically controlled pressure relief valve including a hydraulic bias | Emerging Cross-Sectional Technologies | 95 | Expired |
| US4959581A | Servo valve having a piezoelectric element as a control motor | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5829335A | Control for hydraulic drive or actuator | Mechanical Engineering; Lighting; Heating | 38 | Expired |
| US6863507B1 | Generic free-piston engine with transformer valve assembly for reducing throttling losses | Mechanical Engineering; Lighting; Heating | 34 | Expired |
| US4548383A | Electrically controlled pressure reducing valve | Emerging Cross-Sectional Technologies | 33 | Expired |
| US4966066A | Load sensing system with increasing priority in series of control valves | Performing Operations; Transporting | 33 | Expired |
| US4759183A | Control arrangement for at least two hydraulic loads fed by at least one pump | Fixed Constructions | 32 | Expired |
| US4543875A | Electro-hydraulic directional control valve | Emerging Cross-Sectional Technologies | 31 | Expired |
| US5138837A | Load independent valve control for a plurality of hydraulic users | Emerging Cross-Sectional Technologies | 31 | Expired |
| US4468173A | Control device for a variable displacement pump | Mechanical Engineering; Lighting; Heating | 31 | Expired |
| USD464007S1 | Control lever for vehicles | General | 31 | Expired |
| US4813234A | Hydraulic transmission | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US4531449A | Arrangement for controlling a hydraulic motor | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US4856278A | Control arrangement for at least two hydraulic consumers fed by at least one pump | Mechanical Engineering; Lighting; Heating | 30 | Expired |
| US6367365B1 | Hydraulic circuit | Mechanical Engineering; Lighting; Heating | 29 | Expired |
| US4643225A | Pressure regulating valve | Emerging Cross-Sectional Technologies | 29 | Expired |
| US5070695A | Hydrostatic drive system | Mechanical Engineering; Lighting; Heating | 28 | Expired |
| US5245826A | Vibration suppression apparatus for hydraulic system with improved accumulator filing circuit | Fixed Constructions | 27 | Expired |
| US4478250A | Pressure control valve | Emerging Cross-Sectional Technologies | 26 | Expired |
| US4699571A | Control valve for a variable displacement pump | Mechanical Engineering; Lighting; Heating | 25 | Expired |
| US4878543A | Method for controlling an attachment to agricultural tractors | Physics | 25 | Expired |
| US4970941A | Electrical measured value processing for a control valve | Emerging Cross-Sectional Technologies | 24 | Expired |
| US5852933A | Hydraulic drives system for a press | Mechanical Engineering; Lighting; Heating | 24 | Expired |
| US5230272A | Hydraulic positioning drive with pressure and position feedback control | Physics | 22 | Expired |
| US4712470A | Method and apparatus for compensating the variable weight of a mass acting on a hydraulic drive, in particular for the upright drive cylinder of a lapping machine | Performing Operations; Transporting | 22 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.