| IWAKI CO., LTD. Patent applications |
| Patent application number | Title | Published |
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| 20110091340 | RECIPROCATING PUMP AND CHECK VALVE - A reciprocating pump introduces a liquid into a pump chamber through a suction valve and discharges the liquid from the pump chamber through a discharge valve by reciprocating movement of a reciprocating member facing the pump chamber. The suction valve and the discharge valve include: a body portion having therein a flow path for a liquid; a valve seat portion provided at an entrance side of the flow path of the body portion and having therein a hole through which the liquid flows; a valving element provided in the body portion and able to open and close the hole of the valve seat portion; and a spring provided in the body portion for pressing the valving element into the hole of the valve seat portion. The spring has projections which are formed on an outer circumferential portion of its surface to project toward the inner wall of the body portion. | 04-21-2011 |
| 20100172775 | MAGLEV MOTOR AND PUMP - A maglev motor and a pump using the maglev motor can be provided with strong magnetic bearing force generated by a simple structure, rotation losses of a rotor reduced with the generation of an eddy current suppressed, and a configuration of magnetic bearing can downsize by using a thin rotor. The donut-shaped rotor is arranged between the magnetic bearing unit and the motor unit, the motor yoke of the motor radially has a plurality of projected poles, a coil is close-wound around the projected pole, predetermined clearance is made between the inner side of the rotor and the projected pole, a plurality of two projected poles opposite each other near either end portions of the outer side of the rotor are provided circularly at equal intervals on the magnetic bearing yoke of the magnetic bearing unit, a magnetic bearing coil is close-wound around one of the two projected poles, a first permanent magnet is provided for the other projected pole, predetermined clearance is made on one side of the rotor end portion and the bridge unit for connecting the magnetic bearing unit to the motor unit is provided, a second permanent magnet is provided between the projected pole provided for the magnetic bearing yoke and the bridge yoke of the bridge unit, a third permanent magnet is provided between the motor yoke and the bridge yoke, a plurality of motor permanent magnets opposite the motor yoke are provided inside the rotor, and all projected poles provided on the bridge unit side of the magnetic bearing unit can be close-wound by the magnetic bearing coil, or provided with the first permanent magnet. | 07-08-2010 |
| 20090315421 | HYBRID MAGENTIC BEARING - In a hybrid magnetic bearing, the electromagnet has a core wound with a control coil and has a main pole and a commutating pole with a commutating pole permanent magnet provided approximately parallel to each other at predetermined intervals in a protruding condition radially or axially to the rotor. In the magnetic bearing provided radially, two electromagnets are placed oppositely to each other across the rotor in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. In the magnetic bearing provided axially, two electromagnets are placed in parallel in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. | 12-24-2009 |
| 20090121571 | MAGNETIC LEVITATION MOTOR AND PUMP - A magnetic levitation motor including a stator having magnetic bearing units and a motor unit, and a rotor provided to the stator. And the occurrence of an eddy current at a magnetic bearing is suppressed and the rotation loss of the rotor can be reduced, and also to provide a pump using such the magnetic levitation motor. | 05-14-2009 |
| 20090079284 | Hybrid Magnetic Bearing - In a hybrid magnetic bearing, the electromagnet has a core wound with a control coil and has a main pole and a commutating pole with a commutating pole permanent magnet provided approximately parallel to each other at predetermined intervals in a protruding condition radially or axially to the rotor. In the magnetic bearing provided radially, two electromagnets are placed oppositely to each other across the rotor in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. In the magnetic bearing provided axially, two electromagnets are placed in parallel in an approximately horizontal position, and the rotor is arranged so as to have a predetermined gap with the main pole and the commutating pole, and the permanent magnet is provided between the adjacent electromagnets. | 03-26-2009 |
