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| Number | Title | Issue Date |
| 7514813 | Electric power supply system A power supply system for supplying power to a load is provided. The system comprises power-line carriers for supplying power to the load, and a plurality of power supply units the outputs of which are parallelly connected to power-line carriers. Each of the power s... | 04/07/2009 |
| 7338266 | Screw pump and method of operating the same A screw pump includes a pair of screw rotors (2a, 2b) having teeth which are held in mesh with each other for drawing and discharging a fluid by rotating the screw rotors (2a, 2b) synchronously in opposite dire... | 03/04/2008 |
| 7233082 | Interconnecting power generation system To provide an interconnecting power generation system which can detect an abnormality in the utility power supply and can be isolated from a utility power system and can prevent damage to a turbogenerator. An interconnecting power generation system comprises:... | 06/19/2007 |
| 7061211 | Gas turbine generating apparatus A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-cur... | 06/13/2006 |
| 6979914 | Power generating apparatus A power generating apparatus has a power generator 4 for generating AC power, a gas turbine engine 2 for driving the power generator 4, and an inverter device 5 for converting the AC power into commercial AC power. The power generating ap... | 12/27/2005 |
| 6888263 | Gas turbine generator A gas turbine generating apparatus according to the present invention comprises a gas turbine capable of a high-speed operation, a permanent-magnet-type generator driven at a high speed by the gas turbine, an inverter device (5) for converting alternating-cur... | 05/03/2005 |
| 6424871 | Rotating machine integrated with controller, and inverter The present invention provides a rotary machine integrated with a control device, which is effective to reduce the cost of manufacture of a variable-speed pump or the like, and allows control programs to be easily established at the installation site. The... | 07/23/2002 |
| 6092994 | Liquid delivery device, method of controlling such liquid delivery device, and liquid delivery pump A screw pump includes a casing having inlet and outlet ports and a pump rotor rotatably mounted in the casing and having screw threads communicating with said inlet and outlet ports. The pump rotor is rotated by a reversible speed-controllable motor, typi... | 07/25/2000 |
| 5923108 | Canned motor A light weight and compact canned motor having a high cooling efficiency while maintaining its mechanical properties has been developed. The canned motor has a connection end connected to a driven equipment and a free end and comprises a rotor shaft protr... | 07/13/1999 |
