Patents by Inventor Yoshinobu Honkura
Yoshinobu Honkura 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).
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Patent number: 6709270Abstract: A dental attachment is disclosed which provides an improved connection force and fitting between an implant and a keeper. A keeper has a main body with a attracted face, a screw part that is located at the back face, a conical tapered shaft, and a projecting ring part. The projecting ring part has an inclining inner face and an acute angle pointed end. An implant has a screw hole part, a conical tapered hole part which has about the same inclining angle of the tapered axle part, and an inclining end face. When the keeper and the implant are connected, the tapered shaft and the tapered hole part are fitted closely and at the same time, the inner face of the acute angle pointed end and the inclining end part are in contact and at least the acute angle pointed end of the projecting ring part is elastically transformed toward the diameter.Type: GrantFiled: June 6, 2002Date of Patent: March 23, 2004Assignee: Aichi Steel CorporationInventors: Yoshinobu Honkura, Kazuo Arai, Yasuhiro Takeuchi
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Patent number: 6666930Abstract: The present invention offers a minute-sized magnet with superior magnetic energy product (BH)max and coercivity iHc, as well as superior anti-corrosive properties. This magnet is comprised of an alloy comprised of 35-55 atomic % platinum, 0.001-10 atomic % third element, which is one or more elements from groups IVa, Va, IIIb, or IVb, and a remainder of iron and other unavoidable impurities. The average crystal size of this FePt alloy is 0.3 &mgr;m. By mixing an FePt alloy with a specific element in a designated ratio, an FePt magnet with more excellent characteristics than ones made from previous alloys was successfully made.Type: GrantFiled: March 4, 2002Date of Patent: December 23, 2003Assignee: Aichi Steel CorporationInventors: Hitoshi Aoyama, Yoshinobu Honkura, Takumi Asano
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Patent number: 6659771Abstract: A dental attachment including a magnetic apparatus with magnetic attractive force, and a keeper that is attracted by the magnetic apparatus. The keeper has a convex shaped part with an attractive surface, and an end face provided around and protruding from the convex shaped part. The magnetic apparatus has a permanent magnet. The magnetic apparatus includes a magnetic assembly with an attractive surface and a non-magnetic guide ring made of non-magnetic material around the magnetic assembly. The non-magnetic guide ring has an end face. The non-magnetic guide ring and the attractive surface of the magnetic assembly form a concave part that receives the convex part of the keeper, and the end face of the keeper faces the end face of the non-magnetic guide ring.Type: GrantFiled: November 9, 2001Date of Patent: December 9, 2003Assignee: Aichi Steel CorporationInventors: Yoshinobu Honkura, Kazuo Arai
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Patent number: 6652278Abstract: The present invention is a bar type dental attachment for implants that makes use of magnetic attractive force to secure a denture in place. This bar type dental attachment can rotate corresponding to the movement of the denture during occlusion. The present invention has excellent wear resistance and makes insertion and removal of the denture easy. The present invention has a bar type keeper with an arced attractive face with a constant radius of curvature, and a magnetic assembly that comprises a magnet, a pair of yoke plates sandwiching the magnet, and a seal material made of anticorrosive non-magnetic material that covers the magnet and is hermetically sealed. The attractive surface of the magnetic assembly is curved to fit the keeper.Type: GrantFiled: September 19, 2001Date of Patent: November 25, 2003Assignee: Aichi Steel CorporationInventors: Yoshinobu Honkura, Kazuo Arai
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Publication number: 20030209294Abstract: An alloy for bonded magnets of the present invention includes at least a main component of iron (Fe), 12-16 atomic % (at %) of rare-earth elements (R) including yttrium (Y), and 10.8-15 at % of boron (B), and is subjected to a hydrogen treatment method as HDDR process or d-HDDR process.Type: ApplicationFiled: January 27, 2003Publication date: November 13, 2003Applicant: Aichi Steel CorporationInventors: Yoshinobu Honkura, Norihiko Hamada, Chisato Mishima
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Publication number: 20030164765Abstract: The present invention is a magnetic field detection device that makes use of a frequency characteristic affording circuit in order to selectively detect magnetic signals from a frequency domain accurately at a high level of sensitivity. The present invention has a magneto-impedance element, a detector coil and a negative feedback coil which is wound around the magneto-impedance element, and a frequency characteristic affording circuit which affords a frequency characteristics on the negative feedback signal of a negative feedback connecting an output terminal thereof with the negative feedback coil. Using filters as the frequency characteristic affording circuit, the following are possible uses of this magnetic field detection device: a geomagnet detection device for earthquake prediction (using a high-pass filter), a bill validation apparatus for vending machines, etc. (using a low-pass filter), and a magnetic oscillation detection device for a magnetic gate system (using a band-reject filter).Type: ApplicationFiled: October 18, 2002Publication date: September 4, 2003Applicant: AICHI MICRO INTELLIGENT CORPORATIONInventors: Kazumasa Sumi, Tomohiko Nagao, Yoshinobu Honkura, Masaki Mori
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Publication number: 20030155913Abstract: The present invention is a two-dimensional magnetic sensor, comprising two miniaturized MI elements and an integrated circuit, which boasts a wide magnetic field measurability range, low power consumption, and an extremely small size, which is suitable for use as an electronic compass in, for instance, mobile devices like mobile phones.Type: ApplicationFiled: October 21, 2002Publication date: August 21, 2003Applicant: AICHI MICRO INTELLIGENT CORPORATIONInventors: Yoshinobu Honkura, Masaki Mori, Michiharu Yamamoto, Yoshiaki Koutani
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Publication number: 20030124491Abstract: A dental attachment has been invented whose connection force and fitting between an implant and a keeper are improved. A keeper 3 has a main body 10 with a attracted face 31, a screw part 33 that is located at the back face, a conic taper shaft 35, and a projecting ring part 37. The projecting ring part 37 has an inclining inner face 371 and an acute angle pointed end 375. An implant 10 has a screw hole part 13, a conic taper hole part 15 which has about the same inclining angle of the taper axle part 35, and inclining end face 17. When the keeper 3 and the implant 10 are connected, the taper shaft 35 and the taper hole part 15 are fitted closely and at the same time, the inner face 371 of the acute angle pointed end 375 and the inclining end part 17 touch and at least the acute angle pointed end 375 of the projecting ring part 37 is elastically transformed toward the diameter.Type: ApplicationFiled: June 6, 2002Publication date: July 3, 2003Applicant: AICHI STEEL CORPORATIONInventors: Yoshinobu Honkura, Kazuo Arai, Yasuhiro Takeuchi
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Publication number: 20030118969Abstract: A dental magnetic attachment has been invented that can improve durability by preventing the wear of an attractive face and attracted face. The dental magnetic attachment 1 comprises a keeper 3 embedded in a tooth root 50, and a magnetic assembly 4 that attracts the keeper 3 by magnetic attract force. The magnetic assembly 4 has a yolk 42 that comprises a base part 421 and a lateral wall part 422, a permanent magnet 41, a soft-magnetic shield 43 and non-magnetic seal 44. The attractive face 401 of the magnetic assembly 4 and the attracted face 301 of the keeper 3 are coated by the wear-resistant film 6 with greater than 400 Hv of Vickers hardness.Type: ApplicationFiled: May 1, 2002Publication date: June 26, 2003Applicant: AICHI STEEL CORPORATIONInventors: Yoshinobu Honkura, Kazuo Arai
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Publication number: 20030111921Abstract: The challenge to be solved by the present invention is the miniaturization of a 1-300 W class of motor. This can be achieved by using a hollow-cylinder shaped anisotropic bonded magnet magnetized in a 4-pole configuration. The anisotropic bonded magnet has a maximum energy product approximately 4 times greater than the conventional sintered ferrite magnets. The use of a 4-pole configuration shortens the magnetic path length of the individual magnetic circuits and the magnetic force contributing to the torque is increased. When the torque is kept the same as in the conventional motor, the length of the electromagnetic rotor core and the axial magnet length can be reduced. In this fashion, 1-300 W class motors can be reduced in size.Type: ApplicationFiled: December 10, 2002Publication date: June 19, 2003Applicant: AICHI STEEL CORPORATIONInventors: Yoshinobu Honkura, Yoji Hashimoto, Hironari Mitarai
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Publication number: 20030059740Abstract: The purpose of the present invention is to provide a dental magnetic attachment with minimal gap between the magnetic assembly and keeper, that is easy to install and that results in a denture that is easy to put in and take out.Type: ApplicationFiled: November 9, 2001Publication date: March 27, 2003Inventors: Yoshinobu Honkura, Kazuo Arai
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Publication number: 20030047240Abstract: This invention aims to provide a manufacturing method of an anisotropic magnet powder from which a bonded magnet with an improved loss of magnetization due to structural changes can be achieved. This is achieved by employing a low-temperature hydrogenation process, high-temperature hydrogenation process and the first evacuation process to an RFeB material (R: rare earth element) to manufacture a hydride powder (RFeBHx); the obtained RFeBHx powder (the precursory anisotropic magnet powder) is subsequently blended with a diffusion powder composed of hydride of dysprosium or the like and a diffusion heat-treatment process and a dehydrogenation process are employed. Through this series of processes, an anisotropic magnet powder with a great coercivity and a great degree of anisotropy can be achieved.Type: ApplicationFiled: August 27, 2002Publication date: March 13, 2003Applicant: AICHI STEEL CORPORATIONInventors: Yoshinobu Honkura, Norihiko Hamada, Chisato Mishima
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Publication number: 20020153066Abstract: The present invention offers a minute-sized magnet with superior magnetic energy product (BH)max and coercivity iHc, as well as superior anti-corrosive properties. This magnet is comprised of an alloy comprised of 35-55 atomic % platinum, 0.0 01-10 atomic % third element, which is one or more elements from groups IVa, Va, IIIb, or IVb, and a remainder of iron and other unavoidable impurities. The average crystal size of this FePt alloy is 0.3 &mgr;m. By mixing an FePt alloy with a specific element in a designated ratio, an FePt magnet with more excellent characteristics than ones made from previous alloys was successfully made.Type: ApplicationFiled: March 4, 2002Publication date: October 24, 2002Applicant: AICHI STEEL CORPORATIONInventors: Hitoshi Aoyama, Yoshinobu Honkura, Takumi Asano
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Publication number: 20020137010Abstract: The present invention is of a dental magnetic attachment with superior strength and anticorrosion characteristics that can accommodate moderate swinging or rotation during occlusion without the formation of a gap between the magnetic assembly and the keeper. Wear resistance of the attractive faces is enhanced by the surface treatment of the attractive faces with a layer of Al2O3, TiN, diamond or other substance.Type: ApplicationFiled: November 28, 2001Publication date: September 26, 2002Applicant: AICHI STEEL CORPORATIONInventors: Yoshinobu Honkura, Kazuo Arai
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Patent number: 6444052Abstract: A production method to produce an anisotropic NdFeB based alloy magnet having a high anisotropic ratio and coercivity by a simple procedure. The production method consists of a first hydrogenation process, a second hydrogenation process and a desorption process. The first hydrogenation process at a low temperature produces the hydride that stores hydrogen needed in advance of the phase transformation. After that, the second hydrogenation process at an elevated temperature proceeds smoothly at a moderate reaction rate of the phase transformation and produces the mixture of NdH2, Fe and Fe2 B from the hydride in addition to making the crystallographic orientation of Fe2 B phase consistent with the original R2 Fe14 B matrix phase. Subsequently, the desorption process produces the fine grained microstructure of Nd2 Fe14 BHx with high degrees of alignment of the crystallographic orientation consistent with the original crystallographic orientation of Fe2 B phase.Type: GrantFiled: October 13, 1999Date of Patent: September 3, 2002Assignee: Aichi Steel CorporationInventors: Yoshinobu Honkura, Chisato Mishima
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Publication number: 20020059965Abstract: This invention aims to provide a manufacturing method of an anisotropic magnet powder from which a bonded magnet with an improved loss of magnetization due to structural changes can be achieved. This is achieved by employing a low-temperature hydrogenation process, high-temperature hydrogenation process and the first evacuation process to an RFeB material (R: rare earth element) to manufacture a hydride powder (RFeBHx); the obtained RFeBHx powder (the precursory anisotropic magnet powder) is subsequently blended with a diffusion powder composed of hydride of dysprosium or the like and a diffusion heat-treatment process and a dehydrogenation process are employed. Through this series of processes, an anisotropic magnet powder with a great coercivity and a great degree of anisotropy can be achieved.Type: ApplicationFiled: September 19, 2001Publication date: May 23, 2002Applicant: AICHI STEEL CORPORATIONInventors: Yoshinobu Honkura, Norihiko Hamada, Chisato Mishima
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Publication number: 20020039719Abstract: The present invention is a bar type dental attachment for implants that makes use of magnetic attractive force to secure a denture in place. This bar type dental attachment can rotate corresponding to the movement of the denture during occlusion. The present invention has excellent wear resistance and makes insertion and removal of the denture easy. The present invention has a bar type keeper with an arced attractive face with a constant radius of curvature, and a magnetic assembly that comprises a magnet, a pair of yoke plates sandwiching the magnet, and a seal material made of anticorrosive non-magnetic material that covers the magnet and is hermetically sealed. The attractive surface of the magnetic assembly is curved to fit the keeper.Type: ApplicationFiled: September 19, 2001Publication date: April 4, 2002Applicant: AICHI STEEL CORPORATIONInventors: Yoshinobu Honkura, Kazuo Arai
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Patent number: 6336064Abstract: A magnetic apparatus for detecting a position of a vehicle, capable of detecting a lateral deviating distance of a vehicle over a lateral deviation width with a high accuracy and at a high speed, wherein a magnetic field component in the direction of advance of the vehicle is detected; or more preferably a three dimensional magnetic sensor (1), which comprises a magnetic sensor element for the direction of advance of the vehicle, and magnetic sensor elements for two directions crossing the first-mentioned direction and provided additionally, is used, whereby it becomes possible to heighten a center retaining capability of the vehicle, widen a lateral deviating distance detecting range around four times from around 25 cm to around 1 m, and detect a magnetic marker (3) reliably even when disturbance magnetic field exerts influence upon this detection operation to thereby start center side guidance reliably.Type: GrantFiled: March 28, 2000Date of Patent: January 1, 2002Assignee: Aichi Steel Works, Ltd.Inventors: Yoshinobu Honkura, Hideki Fujii, Aki Watarai, Kako Eiji
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Publication number: 20010030537Abstract: A magnetic field detection device that detects two components of an external magnetic field. The device uses the magneto-impedance effect in ferromagnetic amorphous wire. A detection coil wrapped around the amorphous wire detects the magnetic flux change of the amorphous wire, which is proportional to the external magnetic field. The sensitivity of the device is increased due to circuitry that extracts the initial output pulse. It is also increased with the use of negative feedback and with the comparison of differential outputs. The two sets of detection elements are placed orthogonally for greatest sensitivity. Resin molding is employed for easy handling. This detection device can be used as part of a compass.Type: ApplicationFiled: January 3, 2001Publication date: October 18, 2001Applicant: (1) AICHI STEEL CORPORATION LTD.Inventors: Yoshinobu Honkura, Michiharu Yamamoto, Kaneo Mouri
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Patent number: 6302694Abstract: A keeper of the dental magnetic attachment and method for removal of the keeper is disclosed wherein the keeper can be attracted by a magnetic assembly embedded in a denture base. The keeper includes a body made of soft magnetic material and a post made of non-magnetic material that is connected together at the bottom of said body of the keeper. The post has a bendable part that is connected to the body of the keeper.Type: GrantFiled: July 13, 2000Date of Patent: October 16, 2001Assignee: Aichi Steel Corporation Ltd.Inventors: Yoshinobu Honkura, Kazuo Arai, Hiroyuki Tanaka, Kazunari Kimura, Hiroshi Mizutani, Kenji Hiranuma, Hisao Takakura