| Patent application number | Description | Published |
|---|
| 20090134125 | SWITCHGEAR AND METHOD OF FABRICATING THE SAME - A switchgear including a vacuum valve which prevents partial discharges infallibly and whose reliability is high, and a method of fabricating the same are obtained. | 05-28-2009 |
| 20090160588 | ELECTROMAGNETIC OPERATING DEVICE FOR SWITCH - An electromagnetic operating device for a switch comprises a fixed yoke ( | 06-25-2009 |
| 20090267714 | SWITCH-STATE MONITORING DEVICE - Provision is made for a switch-state monitoring device that not only monitors the state of a switch but also prevents a motor burnout. A switch-state monitoring device for a switch that opens and closes a main circuit by use of a motor is provided with an operating time measuring unit for detecting an operating time for the motor when the switch is opened or closed; a first determination unit for comparing an operating time for the motor detected by the operating time measuring unit with an continuous-operating-capable setting time for the motor and determining whether or not the operating time for the motor has exceeded the continuous-operating-capable setting time; a protection device for halting energization of the motor in the case where, based on an output of the first determination unit, it is determined that the operating time for the motor has exceeded the continuous-operating-capable setting time. | 10-29-2009 |
| 20110000886 | VACUUM CIRCUIT BREAKER AND GAS-INSULATED SWITCHGEAR USING THE SAME - Provided is a vacuum circuit breaker whose insulation cylinder contained in a gas-insulated-switchgear housing contains a vacuum valve and which can be downsized while the cylinder's required mechanical strength is retained, and a gas-insulated switchgear using the same is also provided. The vacuum circuit breaker includes a plurality of insulation cases that are arranged parallel to each other in a container filled with an insulating gas, and each of the plurality of insulation cases includes a first insulation frame in which a section orthogonal to its longitudinal direction is in a substantial square-bracket shape, a second insulation frame in which a section orthogonal to its longitudinal direction is in a substantial square-bracket shape and which is arranged with a gap from the first insulation frame in a manner that open sides of the substantially square-bracket shaped frames oppose to each other, and a vacuum valve that contains attachable and detachable electrodes and is housed in each of the plurality of insulation cases. | 01-06-2011 |
| Patent application number | Description | Published |
|---|
| 20110296803 | AIR FILTER CLEANER AND VIDEO PROJECTOR - An air filter cleaner includes a brush, which cleans an air filter. A case moves back and forth together with the brush, which is arranged on the case. A pinion moves the brush and case back and forth and is arranged in the case. A rack supports the pinion. The rack is arranged along a direction in which the brush moves back and forth and includes a side surface facing toward the case. A groove, which is arranged in the side surface of the rack, extends in the direction in which the brush moves back and forth. A flange, which extends from the case, engages with and slides in the groove. The engagement of the groove and flange restricts movement of the case in a direction perpendicular to the direction in which the brush moves back and forth. | 12-08-2011 |
| 20110298994 | AIR FILTER CLEANER AND VIDEO PROJECTOR - An air filter cleaner includes an air filter that captures dust. A brush cleans the air filter. A dust box collects dust from the brush. A rotary shaft rotates the brush. A moving mechanism moves the brush and the dust box using the rotation of the brush. A one-way clutch connects the brush and the rotary shaft. | 12-08-2011 |
| 20110299040 | AIR FILTER DEVICE AND VIDEO PROJECTOR USING AIR FILTER DEVICE - An air filter device including a first air filter that captures dust from intake air and includes a rim, a filtering surface surrounded by the rim, and a grid dividing the filtering surface into a plurality of sections. A base includes an opening, through which air is drawn, and a frame, which surrounds the opening. The first air filter is coupled to the frame at an upstream side of the opening. A cleaner includes a rotation brush that moves along an upstream surface of the first air filter while rotating to remove dust from the first air filter. A support contacts and supports the rim and the frame at a downstream side of the first air filter against pressing forced applied to the first air filter by the rotation brush. | 12-08-2011 |
| 20110299041 | AIR FILTER DEVICE AND VIDEO PROJECTOR USING AIR FILTER DEVICE - An air filter device including a base, air filter, and self-propelled cleaning unit. The base includes a frame defining an opening through which air is drawn. The air filter captures dust from the air passing through the opening. The air filter is fastened to the frame by a fastener and includes an filter surface. The self-propelled cleaning unit is coupled to the base, moves along the filter surface when cleaning the first air filter, and is located at a standby position on the frame of the base when in a non-cleaning state. The self-propelled cleaning unit, which includes a cleaning brush, a dust box, and a motor, lies away from the entire filter surface of the first air filter and the fastener when located at the standby position. | 12-08-2011 |
| 20110299042 | AIR FILTER DEVICE AND VIDEO PROJECTOR USING AIR FILTER DEVICE - An air filter device for a video projector, which includes a light source lamp having an optical axis and which is used in a state in which the optical axis of the light source lamp is horizontal. The air filter device includes an air filter and a cleaner that cleans the air filter. The cleaner includes a rotation brush rotated about a rotation axis to remove dust from the air filter while moving along an upstream side of the air filter. The rotation brush moves in a direction parallel to the optical axis of the light source lamp. A dust box receives dust removed from the rotation brush. The dust box includes an elongated container, which extends parallel to the rotation axis of the rotation brush, and a dust inlet, which opens toward the rotation brush to receive the dust from the rotation brush. | 12-08-2011 |
| 20110299043 | FILTER UNIT AND VIDEO PROJECTOR - A filter unit includes an air filter, which captures dust from intake air, and a cleaning unit, which automatically cleans the air filter. The cleaning unit includes a rotation brush, which removes dust from the air filter, and a dust box, which extends parallel to the rotation brush. The dust box includes a dust inlet that opens toward the rotation brush and receives dust from the rotation brush. The dust box is removable from the filter unit. | 12-08-2011 |
