公开(公告)号：US20120087167A1

公开(公告)日：2012-04-12

申请号：US13330735

申请日：2011-12-20

Applicant: Atsuhiko KUZUMAKI ,  Hiroshi MOCHIKAWA ,  Takeru MURAO ,  Masahiro TAKASAKI ,  Tadao ISHIKAWA ,  Toshiaki KIKUMA

Inventor： Atsuhiko KUZUMAKI ,  Hiroshi MOCHIKAWA ,  Takeru MURAO ,  Masahiro TAKASAKI ,  Tadao ISHIKAWA ,  Toshiaki KIKUMA

IPC: H02M7/537

CPC classification number: H02M7/5387 ,  H02M7/5388

Abstract: Disclosed is a power conversion device which achieves reductions in switching loss due to a reverse recovery current and heat generation loss. Specifically disclosed is a power conversion device provided with a cascode element configured by electrically connecting a normally-on switching element and a normally-off switching element in series and connecting a gate terminal of the normally-on switching element and a source terminal of the normally-off switching element via a cascode connection diode, and a high-speed diode electrically connected in parallel with the cascode element and having a cathode region connected to a positive electrode terminal and an anode region connected to a negative electrode terminal.

Abstract translation: 公开了一种功率转换装置，其实现由于反向恢复电流和发热损失而引起的开关损耗的降低。 具体公开了一种电源转换装置，其具有通过串联电连接常开开关元件和常开开关元件而构成的共源共栅元件，并将正常开关元件的栅极端子和正常开关元件的源极端子 通过共源共栅连接二极管断开开关元件，以及与该共源共栅元件并联电连接的高速二极管，并且具有与正电极端子连接的阴极区域和与负极端子连接的阳极区域。

公开(公告)号：US5289206A

公开(公告)日：1994-02-22

申请号：US773428

申请日：1991-10-09

Applicant: Tadao Ishikawa ,  Nazuhiko Sanda ,  Ryoji Hirakata ,  Kiyokatsu Sugiyama

Inventor： Tadao Ishikawa ,  Nazuhiko Sanda ,  Ryoji Hirakata ,  Kiyokatsu Sugiyama

IPC: B41J15/04 ,  B43L13/00 ,  B65H5/06 ,  G01D9/38 ,  G01D15/24

CPC classification number: G01D9/38 ,  B65H5/062 ,  G01D15/24 ,  B65H2511/10

Abstract: An XY plotter includes a pair of grip and pinch rollers for feeding recording paper in one direction while gripping the recording paper therebetween, a pen carriage arranged to be movable in the direction perpendicular to the one direction, a pen supported by the pen carriage for performing recording on the recording paper, a grip roller shaft provided parallel to the traveling direction of the pen carriage, the grip roller shaft having a non-circular section, a movable stand arranged so that the position thereof is adjustable in the longitudinal direction of the grip roller shaft, and the grip and pinch roller including a movable partial grip roller and a pinch roller, the movable partial grip roller being mounted on the movable stand so that the movable partial grip roller is not rotatable relative to the grip roller shaft but is movable on the grip roller shaft in the longitudinal direction thereof, the pinch roller being supported on the movable stand so that the pinch roller is made to come into contact against a circumferential surface of the movable partial grip roller.

Abstract translation: XY绘图仪包括一对抓握辊和夹送辊，用于在夹持其间的记录纸的同时沿一个方向进给记录纸;布置成可沿与该一个方向垂直的方向移动的笔托，由笔托支撑的笔，用于执行 记录在记录纸上，与笔架的行进方向平行设置的夹持辊轴，夹持辊轴具有非圆形部分，可移动支架布置成使得其位置在握柄的纵向可调节 辊轴，夹持辊包括可动部分夹持辊和夹送辊，可动部分夹持辊安装在可动支架上，使得可动部分夹持辊相对于夹持辊轴不能旋转，但是是可移动的 在夹持辊轴的纵向方向上，夹送辊被支撑在可动支架上，使得夹送辊是ma de可动部分夹持辊的圆周表面接触。

公开(公告)号：US5123217A

公开(公告)日：1992-06-23

申请号：US574358

申请日：1990-08-29

Applicant: Tadao Ishikawa ,  Yutaka Yoshida ,  Toshiyuki Sunakoda

Inventor： Tadao Ishikawa ,  Yutaka Yoshida ,  Toshiyuki Sunakoda

IPC: B28D1/14

CPC classification number: B28D1/146 ,  Y10T408/78 ,  Y10T408/81

Abstract: A drill for use in drilling hard and brittle materials includes a shank and a drilling portion attached to one end of the shank. The drilling portion includes a tapered primary cutting edge, a first secondary cutting surface extending from the primary cutting edge and having an angle of taper substantially identical to that of the primary cutting edge, and a second secondary cutting surface extending from the first secondary cutting surface and containing a line substantially parallel to the central axis of the drill. The primary cutting edge has a first abrasive grain layer, and the first and second secondary cutting surfaces both have a second abrasive grain layer. The first and second abrasive grain layers both have a binder made of material selected from the group consisting of metal, resin and glass. Each abrasive grain in the first abrasive grain layer has a diameter greater than that of each abrasive grain in the second abrasive grain layer.

Abstract translation: 用于钻出硬脆材料的钻头包括连接到柄的一端的柄和钻孔部分。 所述钻孔部分包括锥形主切削刃，从所述主切削刃延伸并且具有与所述主切削刃基本相同的锥度角的第一次切削表面和从所述第一次切削表面延伸的第二次切削表面 并且包含基本上平行于钻头的中心轴线的线。 主切削刃具有第一磨粒层，第一和第二次切削面均具有第二磨粒层。 第一和第二磨粒层均具有由选自金属，树脂和玻璃的材料制成的粘合剂。 第一磨粒层中的每个磨粒的直径大于第二磨粒层中每个磨粒的直径。

公开(公告)号：US08649198B2

公开(公告)日：2014-02-11

申请号：US13330735

申请日：2011-12-20

Applicant: Atsuhiko Kuzumaki ,  Hiroshi Mochikawa ,  Takeru Murao ,  Masahiro Takasaki ,  Tadao Ishikawa ,  Toshiaki Kikuma

Inventor： Atsuhiko Kuzumaki ,  Hiroshi Mochikawa ,  Takeru Murao ,  Masahiro Takasaki ,  Tadao Ishikawa ,  Toshiaki Kikuma

IPC: H02M7/5387 ,  H02M3/335 ,  H02M3/24 ,  H02M7/44

CPC classification number: H02M7/5387 ,  H02M7/5388

Abstract: Disclosed is a power conversion device which achieves reductions in switching loss due to a reverse recovery current and heat generation loss. Specifically disclosed is a power conversion device provided with a cascode element configured by electrically connecting a normally-on switching element and a normally-off switching element in series and connecting a gate terminal of the normally-on switching element and a source terminal of the normally-off switching element via a cascode connection diode, and a high-speed diode electrically connected in parallel with the cascode element and having a cathode region connected to a positive electrode terminal and an anode region connected to a negative electrode terminal.

Abstract translation: 公开了一种功率转换装置，其实现由于反向恢复电流和发热损失而引起的开关损耗的降低。 具体公开了一种电源转换装置，其具有通过串联电连接常开开关元件和常开开关元件而构成的共源共栅元件，并将正常开关元件的栅极端子和正常开关元件的源极端子 通过共源共栅连接二极管断开开关元件，以及与该共源共栅元件并联电连接的高速二极管，并且具有与正电极端子连接的阴极区域和与负极端子连接的阳极区域。

公开(公告)号：US06994614B2

公开(公告)日：2006-02-07

申请号：US10647230

申请日：2003-08-26

Applicant: Sokichi Takemura ,  Tadao Ishikawa

Inventor： Sokichi Takemura ,  Tadao Ishikawa

IPC: B23F21/03

CPC classification number: B24D3/06

Abstract: A metal-bonded grinding tool including a base and abrasive grains bonded to the base by means of a metal bond matrix containing a Cu alloy as a main component. A content of at least one of an alloy phase, a mixed phase, and an intermetallic compound of Zr and Ti in the metal bond matrix is in a range of 3.8 to 19.2 wt %.

Abstract translation: 一种金属结合研磨工具，其包括通过含有Cu合金作为主要成分的金属键合基体与基体结合的基体和磨料颗粒。 金属键合基体中的Zr和Ti的合金相，混合相和金属间化合物中的至少一种的含量为3.8〜19.2重量％。

公开(公告)号：US06579332B1

公开(公告)日：2003-06-17

申请号：US09612294

申请日：2000-07-07

Applicant: Sokichi Takemura ,  Tadao Ishikawa

Inventor： Sokichi Takemura ,  Tadao Ishikawa

IPC: B24D1800

CPC classification number: B24D3/06 ,  B24D5/12

Abstract: A metal-bonded grinding tool including a base, and abrasive grains bonded to the base by a bond matrix containing Cu alloy as a main component. The bond matrix further contains a powder selected from the group consisting of Ti, Al, and a mixture thereof. An average grain protrusion is set to 30% or more of an average grain diameter, and an average grain spacing is set to 200% or more of the average grain diameter.

Abstract translation: 一种金属结合研磨工具，其包括基体和通过含有Cu合金作为主要成分的键合基体与基底结合的磨料颗粒。 键合基体还含有选自Ti，Al及其混合物的粉末。 将平均粒状突起设定为平均粒径的30％以上，平均粒径设定为平均粒径的200％以上。

公开(公告)号：US06526960B2

公开(公告)日：2003-03-04

申请号：US09782705

申请日：2001-02-13

Applicant: Toshihiko Asada ,  Tadao Ishikawa

Inventor： Toshihiko Asada ,  Tadao Ishikawa

IPC: B28D108

CPC classification number: B23D65/00 ,  B23D61/185

Abstract: A wire-saw constituted by a rope-like core wire and a cylindrical coil-like saw-wire body wounded around the core wire, and a large number of abrasive grains firmly fixed to the saw-wire body by metal. Problems of conventional wire-saws, such as unstable working performance, a short tool life, low safety and low reliability, and so on, are solved.

Abstract translation: 由绳状芯线和围绕芯线缠绕的圆筒状线圈状锯线体构成的线锯和通过金属牢固地固定在锯线体上的大量磨粒。 解决了常规线锯的问题，如工作性能不稳定，刀具寿命短，安全性低，可靠性低等优点。