Patents by Inventor Takuya Maeda
Takuya Maeda 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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Publication number: 20060017345Abstract: A synchronous electric motor including a rotor having a rotation axis, and a stator surrounding the rotor through a gap. The rotor includes a rotor core having an outer circumferential surface extending about the rotation axis and a plurality of permanent magnets attached to the rotor core to form plural poles along the outer circumferential surface of the rotor core. The outer circumferential surface of the rotor core is provided, at each pole, with a contour deviating from a circular arc and bulging out in a radial outward direction, as seen in a cross-section perpendicular to the rotation axis. The permanent magnets include a plurality of magnet sets individually assigned to the plural poles, each set including two or more permanent magnets. The contour of the outer circumferential surface of the rotor core, at each pole, has at least partially a shape represented by a hyperbolic cosine function or a secant function.Type: ApplicationFiled: June 24, 2005Publication date: January 26, 2006Applicant: FANUC LTD.Inventors: Hiroyuki Uchida, Tomonaga Yamamoto, Takuya Maeda, Hiroshi Kougami
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Publication number: 20060007150Abstract: A haptic feedback input device includes an operating section that is operated by a user, a motor that pivots in conjunction with the pivot operation of the operating section, a base that pivotably holds the motor via a pivot holder (motor supporting section), a cam member and driving rods (click feeling imparting unit) which impart a click feeling according to the pivot operation of the operating section. The pivot center of the motor is disposed below the center of gravity of the motor.Type: ApplicationFiled: June 6, 2005Publication date: January 12, 2006Inventors: Kazunobu Onodera, Takuya Maeda
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Publication number: 20050259075Abstract: A haptic feedback input device includes a pair of driving levers journaled at a frame such that rotary shafts thereof are perpendicular to each other, an operating lever coupled to an intersection of the two driving levers such that it can rock, and a pair of rotary motors that apply feedback force to the operating lever via the two driving levers. In the haptic feedback input device, a pair of rotary encoders detect the relative dislocation amount of the operating level, and an absolute position detecting unit is composed of swing arms fixed to the two driving levers and photo interrupters that detect the existence of blocking portions formed at the swing arms and that output ON/OFF signals. A control unit calculates a reference position of the operating lever based on ON/OFF switching signals of the photo interrupters.Type: ApplicationFiled: May 12, 2005Publication date: November 24, 2005Inventors: Shinji Ishikawa, Takuya Maeda, Satoshi Hayasaka, Noriyuki Fukushima, Ken Matsumoto, Kaiji Nonaka
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Patent number: 6965084Abstract: A driving body is placed on four sets of push switches which are arranged on a concentric circle at equal intervals of 90 degrees. The driving body is pivotally supported by a holder to be rockable, and a driving rod protruding from the driving body is inserted through a square opening formed in the slider, and respective sides of the opening are set parallel to straight lines connecting two sets of adjacent push switches with each other.Type: GrantFiled: February 7, 2005Date of Patent: November 15, 2005Assignee: Alps Electric Co., Ltd.Inventors: Yoshiaki Kumasaka, Takuya Maeda
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Publication number: 20050229382Abstract: Flat rolled magnetic steel sheets and strip or a die is turned in the press forming process. Rotor cores are stacked with turning through an angle which is an odd number multiple of about (360°/(number of slots in the motor×natural number n×2) and stator cores are stacked with turning through an angle which is an odd number multiple of (360°/(number of poles in the motor×natural number n×2)). Stacking with turning through an angle which is an odd number multiple converts the phases of cogging torques into mutually opposite phases and cancels and reduces the cogging torque caused by magnetic anisotropy.Type: ApplicationFiled: June 20, 2005Publication date: October 20, 2005Applicant: FANUC LTDInventors: Tomonaga Yamamoto, Takuya Maeda
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Publication number: 20050229384Abstract: Flat rolled magnetic steel sheets and strip or a die is turned in the press forming process. Rotor cores are stacked with turning through an angle which is an odd number multiple of about (360°/(number of slots in the motor×natural number n×2)) and stator cores are stacked with turning through an angle which is an odd number multiple of (360°/(number of poles in the motor×natural number n×2)). Stacking with turning through an angle which is an odd number multiple converts the phases of cogging torques into mutually opposite phases and cancels and reduces the cogging torque caused by magnetic anisotropy.Type: ApplicationFiled: June 20, 2005Publication date: October 20, 2005Applicant: FANUC LTDInventors: Tomonaga Yamamoto, Takuya Maeda
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Publication number: 20050183937Abstract: A driving body is placed on four sets of push switches which are arranged on a concentric circle at equal intervals of 90 degrees. The driving body is pivotally supported by a holder to be rockable, and a driving rod protruding from the driving body is inserted through a square opening formed in the slider, and respective sides of the opening are set parallel to straight lines connecting two sets of adjacent push switches with each other.Type: ApplicationFiled: February 7, 2005Publication date: August 25, 2005Inventors: Yoshiaki Kumasaka, Takuya Maeda
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Publication number: 20050171335Abstract: An object of the invention is to provide an antimicrobial peptide having an amino acid sequence which is different from a peptide existing and functioning as an antimicrobial peptide in the natural world and is not based on the conventional developmental approach for an antimicrobial peptide-containing antimicrobial agent, and a polynucleotide coding for said peptide. Another object is to provide an antimicrobial agent which contains such an antimicrobial peptide. Namely, an antimicrobial peptide represented by a general formula (1) (Xa)n-S??(1) wherein Xa of the formula (1) is a hydrophilic amino acid residue, n is an integer of from 1 to 6, two or more of the Xa may be the same or different from one another, S is a peptide represented by hydrophobic amino acid part-basic amino acid part-bridge part-basic amino acid part-hydrophobic amino acid part, and amino acid residue of the bridge part is selected from the group consisting of hydrophobic amino acids and neutral amino acids.Type: ApplicationFiled: May 25, 2004Publication date: August 4, 2005Inventors: Hiroki Kourai, Takuya Maeda, Hideaki Nagamune, Nahoko Kobayashi
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Publication number: 20050077156Abstract: A fixed shaft mounted to a lower casing holds a tiltable component used for operating tilt-detecting switches. At the upper portion of the tiltable component, a tilt-operation feel providing member including a first slider unit being slidable by the tiltable component, driving bars in contact with the first slider unit, and springs urging the driving bars toward the first slider unit is arranged. First operational-feel providing portions arranged like flowers are formed on the bottom of the first slider unit. When the tiltable component is tilted, the first slider unit is slid. The driving bars are then moved on recesses constituting the first operational-feel providing portions.Type: ApplicationFiled: October 12, 2004Publication date: April 14, 2005Inventors: Hiroshi Ushimaru, Yukiharu Hayashi, Takuya Maeda
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Patent number: 6873066Abstract: In a linear motor, magnetic poles on a stator (or moving element) and teeth on a moving element (or stator) face one another to form a gap. The gap-side surface of each of the magnetic poles or teeth has an external shape represented by a hyperbolic function or a reciprocal function of cosine. Thus, the cogging torque can be made lower than that of a conventional linear motor of which the magnetic poles (permanent magnets) or teeth have an external shape represented by a straight line, circular arc, parabola, or hyperbola.Type: GrantFiled: April 30, 2003Date of Patent: March 29, 2005Assignee: Fanuc LTDInventors: Tomonaga Yamamoto, Takuya Maeda
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Publication number: 20050023925Abstract: Flat rolled magnetic steel sheets and strip or a die is turned in the press forming process. Rotor cores are stacked with turning through an angle which is an odd number multiple of about (360°/(number of slots in the motor×natural number n×2)) and stator cores are stacked with turning through an angle which is an odd number multiple of (360°/(number of poles in the motor×natural number n×2)). Stacking with turning through an angle which is an odd number multiple converts the phases of cogging torques into mutually opposite phases and cancels and reduces the cogging torque caused by magnetic anisotropy.Type: ApplicationFiled: March 5, 2004Publication date: February 3, 2005Applicant: FANUC LTDInventors: Tomonaga Yamamoto, Takuya Maeda
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Publication number: 20050007056Abstract: A motor is provided with a storage medium for storing test information unique to the motor, acquired by tests in the course of motor manufacturing process. By using test information unique to each individual motor, automatic fine adjustment of each motor is made possible.Type: ApplicationFiled: July 1, 2004Publication date: January 13, 2005Applicant: FANUC LTDInventors: Tomonaga Yamamoto, Takuya Maeda, Akihiro Hosoda
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Patent number: 6812614Abstract: A rotor for a synchronous motor capable of increasing output torque and reduce inductance. An outer periphery of each pole of the rotor in a cross section perpendicular to an axis of the rotor is defined on the basis of a curve of a hyperbolic function. Since an outer periphery of one pole of the rotor at a central apex portion is substantially identical with that of a conventional rotor defined by a circular arc, the output torque of the synchronous motor using this rotor is not decreased. At side portions adjacent to the central apex portion, the outer periphery is positioned inner, i.e., closer to the axis of the rotor than the outer periphery defined by the circular arc, so that a gap between the outer periphery of the rotor and an inner periphery of a stator is made greater to reduce the inductance of the synchronous motor.Type: GrantFiled: June 4, 2001Date of Patent: November 2, 2004Assignee: Fanuc Ltd.Inventors: Tomonaga Yamamoto, Takuya Maeda
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Publication number: 20040087403Abstract: A manual input device contains a rotatable operating member, a motor that exerts a rotational force on the operating member, a planet gear mechanism having a sun gear fixed to an output shaft of the motor, planet gears engaging and moving around the sun gear, a ring gear engaging the planet gears on the inner peripheral side thereof, a carrier rotatably supporting the planet gears and rotating along with the planet gears, and a carrier shaft rotating integrally with the carrier and the operating member. A motor holder has at least one projection which abuts against at least one side surface of an end portion of the motor, is disposed on a side of the motor holder opposite from an output shaft side of the motor holder, and is configured to hold the motor.Type: ApplicationFiled: October 22, 2003Publication date: May 6, 2004Applicant: Alps Electric Co., Ltd.Inventor: Takuya Maeda
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Publication number: 20040080220Abstract: A cooling jacket for an electric motor and a motor unit with a cooling jacket mounted on an electric motor having simple structure and capable of being manufactured with reduced number of processes. A cooling pipe made of copper and the like is bent, and held by plate members and lid members, and resin having high heat-conductivity is filled in between to form a series of segments of the cooling jacket. Adjacent ones of the segments are connected with each other by connecting members to form the cooling jacket. The plate members are formed to conform with a shape of the electric motor. The series of segments are mounted on an outer surface of the electric motor and gaps between the adjacent segments are adjusted to bring the plate members into close contact with the outer surface of the electric motor.Type: ApplicationFiled: October 22, 2003Publication date: April 29, 2004Applicant: Fanuc Ltd.Inventors: Tomonaga Yamamoto, Takuya Maeda
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Patent number: 6710565Abstract: A manual inputting device which includes a sun gear, three planet gears, a motor having an output shaft thereof fixed to the sun gear, a ring gear casing integrally forming a ring gear on an inner peripheral surface thereof, a carrier rotated along with revolution of the planet gears, a carrier shaft mounted on the carrier, a restricting member facing the carrier in an opposed manner while sandwiching the planet gears therebetween, a knob fixed to the carrier shaft, a code plate integrally formed with the sun gear, a light emitting section, a light receiving section, a connector for outputting detection signals generated from the light receiving section, a board connecting these components thereto, a body casing, a bracket served for fixing the motor to the body casing, and a control unit for controlling the motor in response to detection signals from the light receiving section.Type: GrantFiled: August 1, 2002Date of Patent: March 23, 2004Assignee: Alps Electric Co., Ltd.Inventor: Takuya Maeda
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Publication number: 20030227221Abstract: In a linear motor, magnetic poles on a stator (or moving element) and teeth on a moving element (or stator) face one another to form a gap. The gap-side surface of each of the magnetic poles or teeth has an external shape represented by a hyperbolic function or a reciprocal function of cosine. Thus, the cogging torque can be made lower than that of a conventional linear motor of which the magnetic poles (permanent magnets) or teeth have an external shape represented by a straight line, circular arc, parabola, or hyperbola.Type: ApplicationFiled: April 30, 2003Publication date: December 11, 2003Applicant: FANUC LTD.Inventors: Tomonaga Yamamoto, Takuya Maeda
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Publication number: 20030030407Abstract: A manual inputting device which includes a sun gear, three planet gears, a motor having an output shaft thereof fixed to the sun gear, a ring gear casing integrally forming a ring gear on an inner peripheral surface thereof, a carrier rotated along with revolution of the planet gears, a carrier shaft mounted on the carrier, a restricting member facing the carrier in an opposed manner while sandwiching the planet gears therebetween, a knob fixed to the carrier shaft, a code plate integrally formed with the sun gear, a light emitting section, a light receiving section, a connector for outputting detection signals generated from the light receiving section, a board connecting these components thereto, a body casing, a bracket served for fixing the motor to the body casing, and a control unit for controlling the motor in response to detection signals from the light receiving section.Type: ApplicationFiled: August 1, 2002Publication date: February 13, 2003Applicant: Alps Electric Co., Ltd.Inventor: Takuya Maeda
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Patent number: 6436890Abstract: The present invention provides an antimicrobial detergent composition containing, as an antimicrobial agent, a bis-quaternary ammonium compound of the general formula wherein the two R1 may be the same or different and each represents an alkyl group of 1 to 18 carbon atoms or an alkenyl group of 3 to 18 carbon atoms; the two R2 may be the same or different and each represents a hydrogen atom, a halogen atom, a hydroxyl group, an amino group, an alkyl group of 1 to 6 carbon atoms or an alkoxy group of 1 to 3 carbon atoms; R3 represents an alkylene group of 1 to 18 carbon atoms, an alkenylene group of 3 to 18 carbon atoms or a phenylene or xylylene group which may optionally be substituted by an alkyl group of 1 to 18 carbon atoms, an alkoxy group of 1 to 6 carbon atoms or an alkoxycarbonyl group of 2 to 6 carbon atoms; Y1 represents —NHCO—, —CONH—, —NHCS—, —COO—, —COS—, —O— or —S—; Y2 represents —CONH&mdType: GrantFiled: October 10, 2000Date of Patent: August 20, 2002Assignee: Inui CorporationInventors: Hiroki Kourai, Takuya Maeda, Munehiro Yoshida, Kensei Kunikata, Kouji Wada
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Publication number: 20020067096Abstract: A rotor for a synchronous motor capable of increasing output torque and reduce inductance. An outer periphery of each pole of the rotor in a cross section perpendicular to an axis of the rotor is defined on the basis of a curve of a hyperbolic function. Since an outer periphery of one pole of the rotor at a central apex portion is substantially identical with that of a conventional rotor defined by a circular arc, the output torque of the synchronous motor using this rotor is not decreased. At side portions adjacent to the central apex portion, the outer periphery is positioned inner, i.e., closer to the axis of the rotor than the outer periphery defined by the circular arc, so that a gap between the outer periphery of the rotor and an inner periphery of a stator is made greater to reduce the inductance of the synchronous motor.Type: ApplicationFiled: June 4, 2001Publication date: June 6, 2002Inventors: Tomonaga Yamamoto, Takuya Maeda