Patents by Inventor Yoji Tasaki
Yoji Tasaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10584949Abstract: A wireless detonator (10) includes a detonation side receiving antenna (11), a detonation side transmitting antenna (18), an initiator (14) and a detonation side electronic circuit. The detonation side receiving antenna (11) receives energy for driving the detonation side electronic circuit, a control signal and an initiation signal. The detonation side electronic circuit receives the energy, the control signal and the initiation signal via the detonation side receiving antenna (11), transmits a response signal via the detonation side transmitting antenna (18) and ignites the initiator (14) in accordance with the initiation signal. A response frequency of the response signal is set to be greater than or equal to 100 MHz and less than or equal to 1 GHz.Type: GrantFiled: April 19, 2017Date of Patent: March 10, 2020Assignees: NOF CORPORATION, FUTABA CORPORATIONInventors: Yoji Tasaki, Satoshi Hikone, Shinya Tanaka, Kohichi Shimazaki, Kazuhito Watanabe, Michihiro Takayasu
-
Publication number: 20190137249Abstract: A wireless detonator (10) includes a detonation side receiving antenna (11), a detonation side transmitting antenna (18), an initiator (14) and a detonation side electronic circuit. The detonation side receiving antenna (11) receives energy for driving the detonation side electronic circuit, a control signal and an initiation signal. The detonation side electronic circuit receives the energy, the control signal and the initiation signal via the detonation side receiving antenna (11), transmits a response signal via the detonation side transmitting antenna (18) and ignites the initiator (14) in accordance with the initiation signal. A response frequency of the response signal is set to be greater than or equal to 100 MHz and less than or equal to 1 GHz.Type: ApplicationFiled: April 19, 2017Publication date: May 9, 2019Applicants: NOF CORPORATION, FUTABA CORPORATIONInventors: Yoji TASAKI, Satoshi HIKONE, Shinya TANAKA, Kohichi SHIMAZAKI, Kazuhito WATANABE, Michihiro TAKAYASU
-
Patent number: 9709373Abstract: A wireless detonator is provided with: a detonation part; a control part for igniting the detonation part, the control part being connected to the detonation part; a tube for accommodating the detonation part and the control part; and a detonation-side antenna used by the control part for wireless communication and capable of being used for sending and receiving without separately having a transmission-only antenna and a reception-only antenna; the detonation-side antenna being a soft magnetic body coil antenna, and the control part receiving, via the detonation-side antenna, a transmission signal at an operating frequency of 100-500 KHz.Type: GrantFiled: December 26, 2013Date of Patent: July 18, 2017Assignee: NOF CorporationInventors: Satoshi Hikone, Yoji Tasaki
-
Publication number: 20160003599Abstract: A wireless detonator is provided with: a detonation part; a control part for the detonation part, the control part being connected to the detonation part; a tube for accommodating the detonation part and the control part; and a detonation-side antenna used by the control part for wireless communication and capable of being used for sending and receiving without separately having a transmission-only antenna and a reception-only antenna; the detonation-side antenna being a soft magnetic body coil antenna, and the control part receiving, via the detonation-side antenna, a transmission signal at an operating frequency of 100-500 KHz.Type: ApplicationFiled: December 26, 2013Publication date: January 7, 2016Inventors: Satoshi Hikone, Yoji Tasaki
-
Patent number: 9016207Abstract: A small, lightweight, and inexpensive gas generator for an airbag device. The gas generator for an airbag device according to the present invention includes: a deployment activating initiator that accommodates a predetermined amount of ignition powder and is activated by an impact on a vehicle; a main gas generating agent that generates a main gas for inflating an airbag when burned; a main gas generation chamber that accommodates the main gas generating agent; a secondary gas generation chamber that is provided in an interior of the main gas generation chamber and accommodates the initiator; and a secondary gas generating agent accommodated in the secondary gas generation chamber.Type: GrantFiled: January 21, 2010Date of Patent: April 28, 2015Assignee: Autoliv ASP, Inc.Inventors: Yoji Tasaki, Mitsuharu Nakamura, Ryutaro Shiraishi, Koji Saiki, Jianlin Chen
-
Patent number: 8328234Abstract: An airbag inflator in which a pressure vessel constituted by a base and a diffuser accommodates an igniter, a gas generating agent, a filter, and an inner cover that covers the gas generating agent and includes a bent portion that contacts an inner wall of the filter. The filter has a layered structure constituted by an inner filter and a wire mesh outer filter. The inner filter is of a cylindrical shape, in which upper and lower end portions are formed in a tapered shape that decreases in height toward an outer peripheral side. The wire mesh outer filter is fitted over an outer peripheral surface of the inner filter, excluding at least the respective end portions formed in the tapered shape, and has a slightly larger outer diameter than an inner diameter of the base. The filter is press-fitted into the base. Thus, the filter can be incorporated into the base easily. Further, close contact with the inner cover can be maintained when the diffuser and the base are integrated by welding.Type: GrantFiled: October 30, 2009Date of Patent: December 11, 2012Assignee: Autoliv ASP, Inc.Inventors: Jianlin Chen, Yoji Tasaki, Akinori Sakamoto, Casey Jenkins, Krista Nash
-
Patent number: 8215670Abstract: An inflator includes a plate-like retainer that is placed in a pressure container of the inflator for producing gas to be supplied to an airbag. At the center of the inflator is formed a fitting section fitted to a tube placed in the pressure container. The tube separates an ignition source and a gas generation agent. At least one pressure release hole is provided on the outer side of the outer periphery of the fitting section. The retainer has a step formed at a portion where the outer periphery of the retainer is in contact with the filter. The retainer and inflator may have simple structures not affecting productivity and reliably preventing gas leakage between the retainer and a filter.Type: GrantFiled: January 31, 2011Date of Patent: July 10, 2012Assignee: Autoliv ASP, Inc.Inventors: Jianlin Chen, Atsuhiro Arai, Yoji Tasaki
-
Publication number: 20120037030Abstract: A small, lightweight, and inexpensive gas generator for an airbag device. The gas generator for an airbag device according to the present invention includes: a deployment activating initiator that accommodates a predetermined amount of ignition powder and is activated by an impact on a vehicle; a main gas generating agent that generates a main gas for inflating an airbag when burned; a main gas generation chamber that accommodates the main gas generating agent; a secondary gas generation chamber that is provided in an interior of the main gas generation chamber and accommodates the initiator; and a secondary gas generating agent accommodated in the secondary gas generation chamber.Type: ApplicationFiled: January 21, 2010Publication date: February 16, 2012Inventors: Yoji Tasaki, Mitsuharu Nakamura, Ryutaro Shiraishi, Koji Saiki, Jianlin Chen
-
Publication number: 20120025504Abstract: An inflator includes a plate-like retainer that is placed in a pressure container of the inflator for producing gas to be supplied to an airbag. At the center of the inflator is formed a fitting section fitted to a tube placed in the pressure container. The tube separates an ignition source and a gas generation agent. At least one pressure release hole is provided on the outer side of the outer periphery of the fitting section. The retainer has a step formed at a portion where the outer periphery of the retainer is in contact with the filter. The retainer and inflator may have simple structures not affecting productivity and reliably preventing gas leakage between the retainer and a filter.Type: ApplicationFiled: January 31, 2011Publication date: February 2, 2012Applicant: AUTOLIV ASP, INC.Inventors: Jianlin CHEN, Atsuhiro ARAI, Yoji TASAKI
-
Patent number: 8096580Abstract: An airbag device may include a gas generator comprising: an initiator that is activated by an impact on a vehicle; an ignition agent that is ignited by the initiator; an ignition agent housing chamber that houses the ignition agent; a gas generating agent that is ignited and burned by the ignition agent; and a combustion chamber housing the gas generating agent. An airbag may be inflated by a gas generated by the combustion of the gas generating agent. Further, the ignition agent housing chamber is only partially filled with the ignition agent, thereby forming a space in the ignition agent housing chamber that is not filled with the ignition agent.Type: GrantFiled: March 4, 2010Date of Patent: January 17, 2012Assignee: Autoliv ASP Inc.Inventors: Ryutaro Shiraishi, Jianlin Chen, Yoji Tasaki
-
Publication number: 20110254255Abstract: To ensure that a wire wound filter can be incorporated into a base of a pressure vessel easily, the present invention provides an airbag inflator in which a pressure vessel 2 constituted by a base 2b and a diffuser 2a accommodates an igniter 3, a gas generating agent 4, a filter 21, and an inner cover 24 that covers the gas generating agent 4 and includes a bent portion 24a that contacts an inner wall of the filter 21. The filter 21 has a layered structure constituted by an inner filter 22 wound into a cylindrical shape, in which upper and lower end surfaces are formed in a tapered shape that decreases in height toward an outer peripheral side, and a wire mesh outer filter 23 that is fitted over an outer peripheral surface of the inner filter 22, excluding at least respective end portions formed in the tapered shape, and has a slightly larger outer diameter than an inner diameter of the base 2b. The filter 21 is press-fitted into the base 2b. Thus, the filter can be incorporated into the base easily.Type: ApplicationFiled: October 30, 2009Publication date: October 20, 2011Inventors: Jianlin Chen, Yoji Tasaki, Akinori Sakamoto, Casey Jenkins, Krista Nash
-
Patent number: 7891703Abstract: An inflator includes a plate-like retainer that is placed in a pressure container of the inflator for producing gas to be supplied to an airbag. At the center of inflator is formed a fitting section fitted to a tube placed in the pressure container. The tube separates an ignition source and a gas generation agent. At least one pressure release hole is provided on the outer side of the outer periphery of the fitting section. The retainer has a step formed at a portion where the outer periphery of the retainer is in contact with the filter. The retainer and inflator may have simple structures not affecting productivity and reliably preventing gas leakage between the retainer and a filter.Type: GrantFiled: June 7, 2007Date of Patent: February 22, 2011Assignee: Autoliv ASP, Inc.Inventors: Jianlin Chen, Atsuhiro Arai, Yoji Tasaki
-
Publication number: 20100225099Abstract: An airbag device may include a gas generator comprising: an initiator that is activated by an impact on a vehicle; an ignition agent that is ignited by the initiator; an ignition agent housing chamber that houses the ignition agent; a gas generating agent that is ignited and burned by the ignition agent; and a combustion chamber housing the gas generating agent. An airbag may be inflated by a gas generated by the combustion of the gas generating agent. Further, the ignition agent housing chamber is only partially filled with the ignition agent, thereby forming a space in the ignition agent housing chamber that is not filled with the ignition agent.Type: ApplicationFiled: March 4, 2010Publication date: September 9, 2010Inventors: RYUTARO SHIRAISHI, Jianlin Chen, Yoji Tasaki
-
Publication number: 20090200780Abstract: An inflator includes a plate-like retainer that is placed in a pressure container of the inflator for producing gas to be supplied to an airbag. At the center of inflator is formed a fitting section fitted to a tube placed in the pressure container. The tube separates an ignition source and a gas generation agent. At least one pressure release hole is provided on the outer side of the outer periphery of the fitting section. The retainer has a step formed at a portion where the outer periphery of the retainer is in contact with the filter. The retainer and inflator may have simple structures not affecting productivity and reliably preventing gas leakage between the retainer and a filter.Type: ApplicationFiled: June 7, 2007Publication date: August 13, 2009Applicant: AUTOLIV NICHIYU CO., LTDInventors: Jianlin Chen, Atsuhiro Arai, Yoji Tasaki
-
Patent number: 4908079Abstract: 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.Type: GrantFiled: July 6, 1989Date of Patent: March 13, 1990Assignee: Nippon Oil and Fats Co., Ltd.Inventors: Yoji Tasaki, Akihiro Tanaka, Koichi Kurokawa, Katsuhide Hattori, Motoyuki Amano
-
Patent number: 4898095Abstract: 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.Type: GrantFiled: April 13, 1988Date of Patent: February 6, 1990Assignees: Nippon Oil and Fats Company, Limited and Kajima Corporation, Kajima CorporationInventors: Yoji Tasaki, Koichi Kurokawa, Katsuhide Hattori, Mikio Takano, Toshikazu Miyajima, Toshifumi Sato, Katsura Ogasawara