Patent application number | Description | Published |
20090046963 | MAGNETIC BEARING DEVICE - A magnetic bearing device includes a main shaft ( | 02-19-2009 |
20090127956 | MOTOR BUILT-IN MAGNETIC BEARING DEVICE - The device includes a rolling bearing unit supporting a radial load and a magnetic bearing unit supporting an axial load and/or a bearing preload; an electromagnet fitted to a spindle housing so as to confront, on a non-contact basis, a flange shaped thrust plate mounted on a main shaft; a motor rotor of a motor for driving the shaft, and a motor stator opposed to the rotor, the shaft being driven by magnetic or Lorentz forces developed between the rotor and the stator; and a sensor detecting an axial force acting on the bearing unit, and a controller controlling the electromagnet. In this device, the stiffness of a composite spring formed by the bearing unit and a support system for the bearing unit is chosen to be higher than the negative stiffness of a composite spring of a motor part comprised of the electromagnet and the motor. | 05-21-2009 |
20090133431 | AIR CYCLE REFRIGERATION AND COOLING SYSTEM, AND TURBINE UNIT FOR THE AIR CYCLE REFRIGERATION AND COOLING - An air cycle refrigerating/cooling system includes a first heat exchanger for cooling air, a turbine unit that has a compressor for compressing the air and an expansion turbine for adiabatically expanding the air, and a second heat exchanger for cooling the air. A compressor rotor of the compressor and a turbine rotor of the expansion turbine are attached to a common main shaft in the turbine unit in such a manner that the turbine unit drives the compressor rotor with a power generated by the turbine rotor, and the main shaft is rotatably supported by a rolling contact bearing. A part or the entirety of a thrust force applied to the main shaft is supported by an electromagnet, and a pressure equalizing device for equalizing a gas pressure at opposite ends of the rolling contact bearing is provided. | 05-28-2009 |
20090136335 | TURBINE UNIT FOR REFRIGERATING/COOLING AIR CYCLE - A compressor rotor | 05-28-2009 |
20090260388 | AIR CYCLE REFRIGERATING/COOLING SYSTEM AND TURBINE UNIT USED THEREFOR - The air cycle refrigerating/cooling system compresses air that has flown in with a compressor ( | 10-22-2009 |
20110203483 | THERMOPLASTIC CELLULOSE ESTER COMPOSITION AND FIBERS MADE THEREFROM - This invention provides fibers made from a thermoplastic cellulose ester composition, which can maintain excellent mechanical properties still after high temperature dyeing treatment, especially suitable as fibers mixed with polyester fibers or as fabrics woven or knitted together with polyester fibers, and also provides the thermoplastic cellulose ester composition constituting the fibers. For example, this invention provides a thermoplastic cellulose ester composition containing at least 70 to 95 wt % of a cellulose fatty acid mixed ester with an average substitution degree of 2.4 to 2.8, 5 to 25 wt % of a plasticizer and 1 to 10 wt % of a cellulose acetate with an average substitution degree of 2.3 to 2.6, and also provides fibers made from the thermoplastic cellulose ester composition. | 08-25-2011 |
20110243759 | CENTRIFUGAL PUMP APPARATUS - A centrifugal blood pump apparatus includes an impeller provided in a blood chamber, a permanent magnet provided in one surface of the impeller, a permanent magnet provided in an inner wall of the blood chamber, a permanent magnet provided in the other surface of the impeller, and a magnetic material and a coil provided in a motor chamber for driving the impeller to rotate via a diaphragm. Grooves for hydrodynamic bearing are formed in the diaphragm facing the impeller, and in the inner wall of the blood chamber, respectively. As a result, the impeller can be smoothly activated to drive by controlling a coil current. | 10-06-2011 |
20110318203 | CENTRIFUGAL PUMP APPARATUS - In this centrifugal blood pump apparatus, one permanent magnet is provided in one surface of an impeller, a second permanent magnet is provided in an inner wall of a blood chamber, a third permanent magnet is provided in the other surface of the impeller, and a fourth permanent magnet and a rotor for driving the impeller to rotate are provided, with an diaphragm being interposed. An amount of change in attractive force between the first permanent magnet and the second permanent magnet and an amount of change in attractive force between the third and fourth permanent magnets when the impeller is eccentric are made substantially equal to each other. Therefore, a levitation position of the impeller can always be maintained at a substantially central position in a housing. | 12-29-2011 |
20120003108 | CENTRIFUGAL PUMP APPARATUS - A centrifugal blood pump apparatus includes an impeller provided in a blood chamber, first and second permanent magnets provided in one surface and the other surface of the impeller respectively, a third permanent magnet provided in an inner wall of the blood chamber, and a magnetic element and a coil for driving the impeller to rotate with a diaphragm being interposed. First and second grooves for hydrodynamic bearing different in shape and depth from each other are formed in the inner wall of the blood chamber facing the impeller, and third and fourth grooves for hydrodynamic bearing different in shape and depth from each other are formed in the diaphragm facing the impeller. The second and fourth grooves for hydrodynamic bearing generate high hydrodynamic pressure when the impeller is activated to rotate, while the first and third grooves for hydrodynamic bearing generate high hydrodynamic pressure when the impeller steadily rotates. | 01-05-2012 |
20140030122 | ROTATION DRIVE DEVICE AND CENTRIFUGAL PUMP APPARATUS EMPLOYING SAME - This centrifugal blood pump apparatus includes an impeller ( | 01-30-2014 |