公开(公告)号：US20090034456A1

公开(公告)日：2009-02-05

申请号：US11817001

申请日：2005-02-25

申请人： Ying Peng ,  Simon Armour ,  Joe McGeehan ,  Tomoyoshi Yokota

发明人： Ying Peng ,  Simon Armour ,  Joe McGeehan ,  Tomoyoshi Yokota

IPC分类号： H04W72/04 ,  H04L27/28

CPC分类号： H04L5/0085 ,  H04B1/715 ,  H04B2001/7154 ,  H04L5/0023 ,  H04L5/0037 ,  H04L5/006

摘要： In a multi user communication system, subcarriers are allocated to subchannels using a quality measurement for each subchannel. An initial sub carrier is allocated to each subchannel, and a quality metric measured. Subsequent subcarriers are allocated in dependence upon the quality measurement for each subchannel. The subchannel with the lowest quality measurement receives the first allocation, and the subchannel with the highest quality measurement receives the last allocation. The subsequent allocation is repeated, following a re-sort of the subchannel quality measurements, until all of the subcarriers are allocated.

公开(公告)号：US07330006B2

公开(公告)日：2008-02-12

申请号：US11406373

申请日：2006-04-19

申请人： Kazutaka Iwata ,  Shinichi Sakamoto ,  Tomoyoshi Yokota ,  Kenichirou Yoshida ,  Tomomasa Nishikawa ,  Atsushi Nakagawa

发明人： Kazutaka Iwata ,  Shinichi Sakamoto ,  Tomoyoshi Yokota ,  Kenichirou Yoshida ,  Tomomasa Nishikawa ,  Atsushi Nakagawa

IPC分类号： H02P1/18

CPC分类号： B25F5/008 ,  H02K7/145 ,  H02K9/06 ,  H02K11/33 ,  Y10S388/937

摘要： A power tool includes a brushless motor, a cooling fan, and a driving unit in a housing. The brushless motor is provided in the housing and having a rotary shaft. The cooling fan is attached to the rotary shaft in the housing, and rotatable together with the rotary shaft. The driving unit is provided in the housing for driving the motor. The driving unit includes an inverter circuit having a circuit board and a plurality of switching elements mounted on the circuit board. The circuit board is positioned on an opposite side to the motor with respect to the cooling fan. The plurality of switching elements is positioned around the cooling fan in a circumferential direction about the rotary shaft.

摘要翻译： 电动工具包括无刷电动机，冷却风扇和壳体中的驱动单元。 无刷电动机设置在壳体中并且具有旋转轴。 冷却风扇安装在壳体中的旋转轴上，并与旋转轴一起旋转。 驱动单元设置在壳体中用于驱动马达。 驱动单元包括具有电路板和安装在电路板上的多个开关元件的逆变器电路。 电路板相对于冷却风扇位于电动机的相对侧。 多个开关元件围绕冷却风扇围绕旋转轴在周向上定位。

公开(公告)号：US20070212990A1

公开(公告)日：2007-09-13

申请号：US11684185

申请日：2007-03-09

申请人： Shinji KURAGANO ,  Tomoyoshi Yokota

发明人： Shinji KURAGANO ,  Tomoyoshi Yokota

IPC分类号： B24B27/08

CPC分类号： B25F5/006

摘要： A power tool has a handle holder portion having a semispherically bulging outer circumference, and an arm portion enclosing the handle holder portion and having a semispherically recessed inner circumference. The bulging outer circumference of the handle holder portion is fitted in the recessed inner circumference of the arm portion. An elastic member is clamped between a power tool body and a handle around the handle holder portion in the radial direction perpendicular to the center axis of the protruding direction of the handle holder portion. A bulging portion for limiting the sliding range of the arm portion is disposed at the leading end of the handle holder portion.

摘要翻译： 电动工具具有具有半球形外周的把手保持器部分和包围手柄保持器部分并且具有半球形内圆周的臂部分。 手柄保持部的凸出外周嵌合在臂部的凹部内周。 弹性构件沿垂直于手柄保持器部分的突出方向的中心轴线的径向夹持在电动工具主体和手柄保持器部分周围的手柄之间。 用于限制臂部分的滑动范围的凸起部分设置在手柄保持器部分的前端。

公开(公告)号：US07212832B2

公开(公告)日：2007-05-01

申请号：US10850695

申请日：2004-05-20

申请人： Tomoyoshi Yokota

发明人： Tomoyoshi Yokota

IPC分类号： H04B7/20

CPC分类号： H04W88/06

摘要： A W-LAN communication unit, a personal handyphone communication unit and an EV-DO communication unit include communication functions corresponding to their communication systems. A W-LAN quality measurement unit detects a value corresponding to RSSI, which is the reception power. An EV-DO quality measurement unit periodically obtains EV-DO quality values. A throughput measurement unit measures the throughput values for the individual communication systems. A condition setting unit designates a condition for the selection of the W-LAN communication unit, the personal handyphone communication unit or the EV-DO communication unit. A threshold value storage unit stores threshold values. A first determination unit compares the throughput values for the W-LAN and the RSSI with threshold values. A second determination unit compares the EV-DO quality values with threshold values. And a selector performs the switching of communication systems.

摘要翻译： W-LAN通信单元，个人手持通信单元和EV-DO通信单元包括与其通信系统相对应的通信功能。 W-LAN质量测量单元检测作为接收功率的RSSI对应的值。 EV-DO质量测量单元定期获得EV-DO质量值。 吞吐量测量单元测量各个通信系统的吞吐量值。 条件设定单元指定用于选择W-LAN通信单元，个人手持通信单元或EV-DO通信单元的条件。 阈值存储单元存储阈值。 第一确定单元将W-LAN和RSSI的吞吐量值与阈值进行比较。 第二确定单元将EV-DO质量值与阈值进行比较。 并且选择器执行通信系统的切换。

公开(公告)号：US20060255756A1

公开(公告)日：2006-11-16

申请号：US11406373

申请日：2006-04-19

申请人： Kazutaka Iwata ,  Shinichi Sakamoto ,  Tomoyoshi Yokota ,  Kenichirou Yoshida ,  Tomomasa Nishikawa ,  Atsushi Nakagawa

发明人： Kazutaka Iwata ,  Shinichi Sakamoto ,  Tomoyoshi Yokota ,  Kenichirou Yoshida ,  Tomomasa Nishikawa ,  Atsushi Nakagawa

IPC分类号： H02P1/18

CPC分类号： B25F5/008 ,  H02K7/145 ,  H02K9/06 ,  H02K11/33 ,  Y10S388/937

摘要： A power tool includes a brushless motor, a cooling fan, and a driving unit in a housing. The brushless motor is provided in the housing and having a rotary shaft. The cooling fan is attached to the rotary shaft in the housing, and rotatable together with the rotary shaft. The driving unit is provided in the housing for driving the motor. The driving unit includes an inverter circuit having a circuit board and a plurality of switching elements mounted on the circuit board. The circuit board is positioned on an opposite side to the motor with respect to the cooling fan. The plurality of switching elements is positioned around the cooling fan in a circumferential direction about the rotary shaft.

摘要翻译： 电动工具包括无刷电动机，冷却风扇和壳体中的驱动单元。 无刷电动机设置在壳体中并且具有旋转轴。 冷却风扇安装在壳体中的旋转轴上，并与旋转轴一起旋转。 驱动单元设置在壳体中用于驱动马达。 驱动单元包括具有电路板和安装在电路板上的多个开关元件的逆变器电路。 电路板相对于冷却风扇位于电动机的相对侧。 多个开关元件围绕冷却风扇围绕旋转轴在周向上定位。

公开(公告)号：US20060131982A1

公开(公告)日：2006-06-22

申请号：US11338824

申请日：2006-01-25

申请人： Tomoyoshi Yokota ,  Shinichi Sakamoto ,  Chikai Yoshimizu ,  Katsuhiro Oomori ,  Tadayoshi Mineta ,  Kenichi Kato

发明人： Tomoyoshi Yokota ,  Shinichi Sakamoto ,  Chikai Yoshimizu ,  Katsuhiro Oomori ,  Tadayoshi Mineta ,  Kenichi Kato

IPC分类号： H02K1/06 ,  H02K23/04 ,  H02K21/26 ,  H02K21/38

CPC分类号： H02K15/03 ,  H02K1/17

摘要： A commutator motor includes a stator and a rotor, and the stator includes a stator yoke and a field magnet. The field magnet is fixed onto the inner peripheral surface of the substantially cylindrical stator yoke. The stator yoke is configured by coaxially stacking a plurality of plate-like annular bodies, and the annular bodies are fixedly connected to each other by caulking at a caulking portion disposed on the annular body. In manufacture, the length of the stator yoke in the axial direction can be arbitrarily changed with the thickness of the annular body in the axial direction as a minimum unit. In case of manufacturing various stator yokes that are different in the axial length, the necessity of replacing a manufacturing machine is eliminated, thereby providing a commutator motor having the stator yoke which is low in the manufacturing costs.

公开(公告)号：US20050018613A1

公开(公告)日：2005-01-27

申请号：US10850695

申请日：2004-05-20

申请人： Tomoyoshi Yokota

发明人： Tomoyoshi Yokota

IPC分类号： H04L1/00 ,  H04B1/40 ,  H04B7/26 ,  H04L12/26 ,  H04L12/28 ,  H04L12/707 ,  H04L12/903 ,  H04W24/00 ,  H04W36/14 ,  H04W36/30 ,  H04W76/02 ,  H04W84/12 ,  H04W88/06 ,  H04W88/08

CPC分类号： H04W88/06

摘要： A W-LAN communication unit, a personal handyphone communication unit and an EV-DO communication unit include communication functions corresponding to their communication systems. A W-LAN quality measurement unit detects a value corresponding to RSSI, which is the reception power. An EV-DO quality measurement unit periodically obtains EV-DO quality values. A throughput measurement unit measures the throughput values for the individual communication systems. A condition setting unit designates a condition for the selection of the W-LAN communication unit, the personal handyphone communication unit or the EV-DO communication unit. A threshold value storage unit stores threshold values. A first determination unit compares the throughput values for the W-LAN and the RSSI with threshold values. A second determination unit compares the EV-DO quality values with threshold values. And a selector performs the switching of communication systems.

摘要翻译： W-LAN通信单元，个人手持通信单元和EV-DO通信单元包括与其通信系统相对应的通信功能。 W-LAN质量测量单元检测作为接收功率的RSSI对应的值。 EV-DO质量测量单元定期获得EV-DO质量值。 吞吐量测量单元测量各个通信系统的吞吐量值。 条件设定单元指定用于选择W-LAN通信单元，个人手持通信单元或EV-DO通信单元的条件。 阈值存储单元存储阈值。 第一确定单元将W-LAN和RSSI的吞吐量值与阈值进行比较。 第二确定单元将EV-DO质量值与阈值进行比较。 并且选择器执行通信系统的切换。