Hiroaki Wada
Hiroaki Wada, Kusatsu-Shi JP
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20110005733 | PIEZOELECTRIC FAN AND COOLING DEVICE USING PIEZOELECTRIC FAN - A piezoelectric fan includes a piezoelectric vibrator that vibrates in a bending mode when a voltage is applied thereto and a plurality of parallel or substantially parallel blades connected to or integrated with the piezoelectric vibrator. The blades are arranged between heat-radiating fins of a heat sink such that the blades bend parallel or substantially parallel to side surfaces of the heat-radiating fins. A joint that connects the blades to each other is disposed at free ends in a longitudinal direction of the blades. When the blades are excited by the piezoelectric vibrator and warm air between the heat-radiating fins is blown, the joint prevents the blades from twisting. | 01-13-2011 |
20110014069 | PIEZOELECTRIC FAN DEVICE AND AIR-COOLING APPARATUS USING THE PIEZOELECTRIC FAN DEVICE - A piezoelectric fan device includes four piezoelectric fans that are arranged side-by-side in their width direction, and ends of the piezoelectric fans opposite to other ends in which the blades extend are coupled side-by-side and supported by a support. The piezoelectric fans include piezoelectric vibrators arranged to flexurally vibrate when a voltage is applied thereto and blades coupled to the piezoelectric vibrators such that the blades can be excited by the piezoelectric vibrators. Two central piezoelectric fans are driven in the same phase and the other two piezoelectric fans are driven in the opposite phase by a voltage applying device. Accordingly, not only vibrations of the centroid acting on the support but also moments about three axes are cancelled out. | 01-20-2011 |
20110064594 | COOLING DEVICE - A piezoelectric fan includes a blade that is joined to a piezoelectric oscillator that bends in response to an application of a voltage, and the blade of the piezoelectric fan is arranged to swing in a space between neighboring heat dissipating fins of a heat sink. The formation of a hole in the blade increases the amplitude of the blade and also improves the sweep effect of sweeping high-temperature air in the vicinity of the wall of the heat dissipating fin, and thus, improves the cooling capability of the piezoelectric fan. | 03-17-2011 |
20120134858 | COOLING DEVICE - A piezoelectric fan includes a blade that is joined to a piezoelectric oscillator that bends in response to an application of a voltage, and the blade of the piezoelectric fan is arranged to swing in a space between neighboring heat dissipating fins of a heat sink. The formation of a hole in the blade increases the amplitude of the blade and also improves the sweep effect of sweeping high-temperature air in the vicinity of the wall of the heat dissipating fin, and thus, improves the cooling capability of the piezoelectric fan. | 05-31-2012 |
Hiroaki Wada, Tochigi JP
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20110054685 | ROBOT OFF-LINE TEACHING METHOD - According to one embodiment, a robot off-line teaching method includes: setting a plurality of virtual teaching points; setting a posture of the virtual tool on a part of the virtual teaching points which include a start point and an end point; executing an interpolating operation between the part of the virtual teaching points; storing a position and a posture of the virtual tool in the execution of the interpolating operation as an interpolating operation point every predetermined interval; selecting any of the stored interpolating operation points which satisfies a predetermined selection criterion every other virtual teaching points; and reading posture data on the selected interpolating operation point and storing the read posture data as posture data on the other virtual teaching points every other virtual teaching points. | 03-03-2011 |
Hiroaki Wada, Aizuwakamatsu-Shi JP
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20090010069 | SEMICONDUCTOR DEVICE AND METHOD FOR CONTROLLING A SEMICONDUCTOR DEVICE - The present invention is directed to a semiconductor device having a non-volatile memory cell | 01-08-2009 |
20100142269 | MEMORY EMPLOYING REDUNDANT CELL ARRAY OF MULTI-BIT CELLS - A memory that employs a redundant cell array for recovery of one or more failed core cell arrays of multi-bit memory cells is described. The memory includes a plurality of core cell arrays, at least one redundant cell array, and a memory controller. The memory controller is configured to dynamically assign the redundant cell array to a failed core cell array when erasing at least a portion of the plurality of core cell arrays. The memory controller is further configured to provide read/write access to the redundant cell array when the failed core cell array is selected for read/write access. | 06-10-2010 |
Hiroaki Wada, Tokyo JP
Patent application number | Description | Published |
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20100020214 | SEMICONDUCTOR DEVICE AND CONTROL METHOD OF THE SAME - The present invention is a semiconductor device including: a resistor R | 01-28-2010 |
20100020598 | SEMICONDUCTOR DEVICE AND CONTROL METHOD OF THE SAME - The present invention is a semiconductor device including: a resistor R | 01-28-2010 |
20110234856 | SEMICONDUCTOR DEVICE AND CONTROL METHOD OF THE SAME - The present invention is a semiconductor device including: a resistor R | 09-29-2011 |
20130169841 | SEMICONDUCTOR DEVICE AND CONTROL METHOD OF THE SAME - The present invention is a semiconductor device including: a resistor R | 07-04-2013 |
Hiroaki Wada, Oumihachiman-Shi JP
Patent application number | Description | Published |
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20090232682 | PIEZOELECTRIC MICRO-BLOWER - A piezoelectric micro-blower capable of efficiently conveying compressive fluid without use of a check valve and ensuring a sufficient flow rate. The micro-blower has a blower body with a first wall and a second wall. Openings are formed in the respective walls and face a center of a diaphragm. An inflow path allowing the openings to communicate with the outside is formed between the walls. By applying a voltage to a piezoelectric element to cause the diaphragm to vibrate, a part of the first wall close to the first opening vibrates. Thus, gas can be drawn from the inflow path and discharged from the opening in the second wall. | 09-17-2009 |
20090232683 | PIEZOELECTRIC MICRO-BLOWER - A piezoelectric micro-blower capable of efficiently conveying compressive fluid without use of a check valve and ensuring a sufficient flow rate. The micro-blower has a blower body with a first wall and a second wall. Openings are formed in the respective walls and face a center of a diaphragm. An inflow path allowing the openings to communicate with the outside is formed between the walls. By applying a voltage to a piezoelectric element to cause the diaphragm to vibrate, a part of the first wall close to the first opening vibrates. Thus, gas can be drawn from the inflow path and discharged from the opening in the second wall. | 09-17-2009 |
Hiroaki Wada, Nagaokakyo-Shi JP
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20110223043 | PIEZOELECTRIC FAN AND COOLING DEVICE - A piezoelectric fan includes reinforcing plates that increase the rigidity of a portion of the vibrating plate corresponding to a gap between a piezoelectric element and a fixing plate. First ends of the reinforcing plates are attached to portions of the vibrating plate on both sides of piezoelectric elements in the width direction, and second ends of the reinforcing plates are attached to a fixed end of the vibrating plate such that the second ends and the fixing plate sandwich the fixed end of the vibrating plate therebetween and such that the reinforcing plates extend over the gap. The reinforcing plates prevent vibration of the portion of the vibrating plate corresponding to the gap, prevent a portion of vibration energy generated by expansion and contraction of the piezoelectric elements from being consumed in the portion corresponding to the gap, and increase the amplitude of the vibration of blade ends. | 09-15-2011 |
20130037245 | PIEZOELECTRIC FAN AND AIR COOLING APPARATUS USING THE PIEZOELECTRIC FAN - A piezoelectric fan includes a vibration plate one end of which in a length direction is supported in a fixed manner and the other end of which in the length direction is a free end; and piezoelectric elements, attached on at least one of front and back surfaces of the vibration plate. In an intermediate portion of the vibration plate in the length direction, a right-angle bent portion is provided, and a plurality of divided blades are defined by slits in an area of the vibration plate extending from the free end to a position located a predetermined distance from the bent portion toward the free end. The piezoelectric element is attached on the portion of the vibration plate between the fixed end and the bent portion. Hence, variations in resonant frequency among the blades are reduced and the blades are efficiently excited using a common piezoelectric element. | 02-14-2013 |
Hiroaki Wada, Fujisawa-Shi, Kanagawa JP
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20150354434 | SPHERICAL ANNULAR SEAL MEMBER - A spherical annular seal member | 12-10-2015 |