公开(公告)号：US5146044A

公开(公告)日：1992-09-08

申请号：US773125

申请日：1991-10-07

申请人： Koichi Kurokawa ,  Kenji Hashimoto

发明人： Koichi Kurokawa ,  Kenji Hashimoto

IPC分类号： F42B3/10 ,  F41A19/63 ,  F42B3/198 ,  F42C13/04 ,  F42C19/12

CPC分类号： F42C13/047 ,  F41A19/63

摘要： A wireless detonator is disclosed that includes an antenna for receiving microwaves, a detonator provided with a heating element, and a transmission circuit. The heating element in the detonator is heated by the energy of the microwaves. The transmission circuit transmits the microwave energy from the antenna directly to the heating element. The antenna has a relative gain of 0 to 20 dB in the frequency band of the microwaves. The absolute value of the reactance component in the radiation impedance of the antenna is at most 50% of the pure resistance component of that impedance. The absolute value of the reactance component in the impedance of the heating element is at most 50% of the pure resistance component of that impedance. The pure resistance components of the radiation impedance of the antenna and of the impedance of the heating element are in a range of 70 to 130% of the characteristic impedance of the transmission circuit.

公开(公告)号：US4908080A

公开(公告)日：1990-03-13

申请号：US379687

申请日：1989-07-13

申请人： Tomoyuki Amano ,  Koichi Kurokawa ,  Koji Edamura

发明人： Tomoyuki Amano ,  Koichi Kurokawa ,  Koji Edamura

IPC分类号： C06B23/00 ,  C06B47/14

CPC分类号： C06B23/004 ,  C06B47/145

摘要： Thermostability, age stability, and ignition property at low temperatures of a W/O type emulsion explosive are remarkably improved by incorporating a chelating agent in the W/O type emulsion explosive.

公开(公告)号：US4754703A

公开(公告)日：1988-07-05

申请号：US017694

申请日：1987-02-24

申请人： Koichi Kurokawa ,  Takeo Ueda

发明人： Koichi Kurokawa ,  Takeo Ueda

IPC分类号： F42C11/00 ,  F41A19/63 ,  F42B3/00 ,  F42B3/12 ,  F42B3/18 ,  F42D1/00 ,  F42D1/04 ,  F42D1/045 ,  F42D1/05

CPC分类号： F42B3/12 ,  F41A19/63 ,  F42D1/05

摘要： A loop portion of a bus wire connected to an electric blasting device is passed through a first magnetic core together with a first loop-like wire, and the first loop-like wire is further passed through a second magnetic core provided in a detonator. The detonator includes a second loop-like wire which is passed through the second magnetic core, an electric bridge connected to the second loop-like wire and a fuse head provided around the electric bridge. When a pulsatory high frequency current is supplied to the bus wire, high frequency currents are induced in the first and second loop-like wires by electromagnetic induction. Then the current flows through the electric bridge of the detonator to fire the primer explosive.

摘要翻译： 连接到电喷射装置的总线的环路部分与第一环状线一起通过第一磁芯，并且第一环状线进一步穿过设置在雷管中的第二磁芯。 雷管包括通过第二磁芯的第二环状线，连接到第二环状线的电桥和围绕电桥设置的保险丝头。 当向总线供给脉动高频电流时，通过电磁感应在第一和第二环状导线中产生高频电流。 然后电流流过雷管的电桥，以对底漆炸药进行点火。

公开(公告)号：US4898095A

公开(公告)日：1990-02-06

申请号：US180882

申请日：1988-04-13

申请人： Yoji Tasaki ,  Koichi Kurokawa ,  Katsuhide Hattori ,  Mikio Takano ,  Toshikazu Miyajima ,  Toshifumi Sato ,  Katsura Ogasawara

发明人： Yoji Tasaki ,  Koichi Kurokawa ,  Katsuhide Hattori ,  Mikio Takano ,  Toshikazu Miyajima ,  Toshifumi Sato ,  Katsura Ogasawara

IPC分类号： C06C7/00 ,  F42B3/113

CPC分类号： F42B3/113 ,  C06C7/00

摘要： A laser beam-detonatable blasting cap containing secondary explosives charged therein in the upper and lower portions, wherein the explosive charged in the upper portion contains a laser beam-absorbing black material and is contacted with an optical fiber at the top. The loading density of the explosive charged in the lower portion is higher than that of the explosive charged in the higher portion, and only the side of the explosive charged in the upper portion is surrounded with a restraining wall. The blasting cap can be easily and surely detonated by a laser beam having a low peak output power generated by means of a pulse-oscillation system without using Q-switching or a continous oscillation system.

摘要翻译： 一种在上部和下部装有二次炸药的激光束可爆炸喷头，其中装在上部的炸药含有激光束吸收黑色材料，并与顶部的光纤接触。 装在下部的炸药的装载密度高于装在上部的炸药的装载密度，只有装在上部的炸药的一侧被限制壁包围。 通过不使用Q开关或连续振荡系统的脉冲振荡系统产​​生的具有低峰值输出功率的激光束，可以容易且可靠地引爆爆破盖。

公开(公告)号：US4908079A

公开(公告)日：1990-03-13

申请号：US377813

申请日：1989-07-06

申请人： Yoji Tasaki ,  Akihiro Tanaka ,  Koichi Kurokawa ,  Katsuhide Hattori ,  Motoyuki Amano

发明人： Yoji Tasaki ,  Akihiro Tanaka ,  Koichi Kurokawa ,  Katsuhide Hattori ,  Motoyuki Amano

IPC分类号： C06B47/14

CPC分类号： C06B47/145

摘要： An excellent water in oil type emulsion explosive having both of a superior handling property and a good aging initiating sensitivity at low temperatures and at small calibers, is provided by using a specific low molecular weight polyethylene as the carbonaceous fuel in the emulsion explosive.

公开(公告)号：US4848232A

公开(公告)日：1989-07-18

申请号：US129136

申请日：1987-12-07

申请人： Koichi Kurokawa ,  Takeo Ueda ,  Yoshiro Osumi

发明人： Koichi Kurokawa ,  Takeo Ueda ,  Yoshiro Osumi

IPC分类号： F42B3/10 ,  F41A19/63 ,  F42B3/18 ,  F42D1/04 ,  F42D1/045 ,  F42D1/055

CPC分类号： F42D1/055 ,  F41A19/63

摘要： An apparatus for electrically blasting a number of electric detonators arranged at a plurality of working faces, including a single controller having a power source unit for supplying a D.C. voltage and a plurality of ignition control units for selectively applying the D.C. voltage; a plurality of oscillators each arranged near respective working faces, the number of the oscillators corresponding to that of the ignition control units, each oscillator being energized with the D.C. voltage to generate a high frequency current and being connected to respective ignition control units via an electric wire bundle; and a plurality of lead wires each connected to outputs of respective oscillators. Loop-like leg wires of electric detonators are electro-magnetically coupled with the lead wires with the aid of transformer magnetic cores.