Danfoss Drives A/S
28Patents
18Active
28Granted
48Portfolio score
Filing activity: Sep 27, 1999 → Oct 9, 2014 · 6 expiring within 5 years
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6468042B2 | Method for regulating a delivery variable of a pump | Mechanical Engineering; Lighting; Heating | 109 | Expired |
| US7221121B2 | Frequency converter for different mains voltages | Emerging Cross-Sectional Technologies | 105 | Expired |
| US7050278B2 | Motor controller incorporating an electronic circuit for protection against inrush currents | Electricity | 99 | Expired |
| US6774664B2 | Method for automated measurement of the ohmic rotor resistance of an asynchronous machine | Physics | 93 | Expired |
| US6717318B1 | Electric motor | Electricity | 90 | Expired |
| US6715996B2 | Method for the operation of a centrifugal pump | Mechanical Engineering; Lighting; Heating | 89 | Expired |
| US6493227B2 | Cooling apparatus for power semiconductors | Electricity | 85 | Expired |
| US6690250B2 | RFI filter for a frequency converter | Electricity | 76 | Expired |
| US6426633B1 | Method for monitoring a rotational angle sensor on an electrical machine | Electricity | 75 | Expired |
| USD583221S1 | Mounting bracket | General | 28 | Expired |
| US9777733B2 | Flow control | Mechanical Engineering; Lighting; Heating | 18 | Active |
| US9605680B2 | Control algorithm of variable speed pumping system | Mechanical Engineering; Lighting; Heating | 16 | Active |
| US8310830B2 | Electronic device and frequency converter of motor | Electricity | 14 | Active |
| US8363408B2 | Electronic device and frequency converter of motor | Electricity | 11 | Active |
| US9551344B2 | Anti-entrapment and anti-dead head function | Mechanical Engineering; Lighting; Heating | 11 | Active |
| US9932984B2 | Pumping system with power optimization | Fixed Constructions | 10 | Active |
| US8023234B2 | Method for detecting earth-fault conditions in a motor controller | Electricity | 7 | Active |
| US9712098B2 | Safety system and method for pump and motor | Electricity | 6 | Active |
| US9556874B2 | Method of controlling a pump and motor | Mechanical Engineering; Lighting; Heating | 5 | Active |
| US8379353B2 | Method for detecting earth-fault conditions in a motor controller | Electricity | 3 | Active |
| US8794301B2 | Flow distributor assembly and a cooling unit with a flow distributor assembly | Electricity | 2 | Active |
| US8552757B2 | Method for detecting a fault in an induction machine | Electricity | 2 | Active |
| US8860344B2 | Method for implementing bootstrap-supply charging in a motor controller at energized motor and motor controller using such a method | Electricity | 2 | Active |
| US9726184B2 | Safety vacuum release system | Mechanical Engineering; Lighting; Heating | 2 | Active |
| US10240606B2 | Pumping system with two way communication | Emerging Cross-Sectional Technologies | 1 | Active |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.