Patents by Inventor Ikuo Matsushita
Ikuo Matsushita 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: 8368280Abstract: A case lid assembly is formed by integrally fitting a brush holder formed of resin and a terminal holder formed of resin to opposite sides of a metal plate which supports a bearing. The brush holder supports a pair of brush bases. The terminal holder supports a PTC element and a pair of electrically conductive members. The electrically conductive members have receptacle terminals and brush base connection portions. Tip ends of the brush bases pass through the metal plate, and come into contact with the brush base connection portions of the electrically conductive members to thereby be electrically connected thereto. The PTC element is accommodated within a PTC element insertion portion of the brush holder which extends through the metal plate in a thrust direction.Type: GrantFiled: December 22, 2008Date of Patent: February 5, 2013Assignee: Mabuchi Motor Co., Ltd.Inventor: Ikuo Matsushita
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Publication number: 20100270879Abstract: A case lid assembly is formed by integrally fitting a brush holder formed of resin and a terminal holder formed of resin to opposite sides of a metal plate which supports a bearing. The brush holder supports a pair of brush bases. The terminal holder supports a PTC element and a pair of electrically conductive members. The electrically conductive members have receptacle terminals and brush base connection portions. Tip ends of the brush bases pass through the metal plate, and come into contact with the brush base connection portions of the electrically conductive members to thereby be electrically connected thereto. The PTC element is accommodated within a PTC element insertion portion of the brush holder which extends through the metal plate in a thrust direction.Type: ApplicationFiled: December 22, 2008Publication date: October 28, 2010Inventor: Ikuo Matsushita
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Patent number: 6944934Abstract: In the case of a small-sized motor of the present invention, a printed board to which an electric circuit including an electric element is attached is mounted on a case cover. The printed board has a soldering part to be connected to a member attached to an interior of the case cover for being connected to an electric power source supplied from an outside and a soldering part to be connected to a projection in a notch provided on an opening part side of the metal case to body-earth the electric circuit. In the soldering part for the body-earthing, at the time of assembling the motor, after fitting the case cover to the metal case opening part, a pair of electrodes are brought into contact from an outside of the metal case near the soldering part, to weld the soldering part by a principle of the electric resistance welding.Type: GrantFiled: March 12, 2003Date of Patent: September 20, 2005Assignee: Mabushi Motor Co., Ltd.Inventors: Ikuo Matsushita, Hideo Tamura, Kenji Tsuyama
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Patent number: 6707219Abstract: In the case of a small-sized motor of the present invention, a printed board to which an electric circuit including an electric element is attached is mounted on a case cover. The printed board has a soldering part to be connected to a member attached to an interior of the case cover for being connected to an electric power source supplied from an outside and a soldering part to be connected to a projection in a notch provided on an opening part side of the metal case to body-earth the electric circuit. In the soldering part for the body-earthing, at the time of assembling the motor, after fitting the case cover to the metal case opening part, a pair of electrodes are brought into contact from an outside of the metal case near the soldering part, to weld the soldering part by a principle of the electric resistance welding.Type: GrantFiled: August 28, 2002Date of Patent: March 16, 2004Assignee: Mabuchi Motor Co., Ltd.Inventors: Ikuo Matsushita, Hideo Tamura, Kenji Tsuyama
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Publication number: 20030173848Abstract: In the case of a small-sized motor of the present invention, a printed board to which an electric circuit including an electric element is attached is mounted on a case cover. The printed board has a soldering part to be connected to a member attached to an interior of the case cover for being connected to an electric power source supplied from an outside and a soldering part to be connected to a projection in a notch provided on an opening part side of the metal case to body-earth the electric circuit. In the soldering part for the body-earthing, at the time of assembling the motor, after fitting the case cover to the metal case opening part, a pair of electrodes are brought into contact from an outside of the metal case near the soldering part, to weld the soldering part by a principle of the electric resistance welding.Type: ApplicationFiled: March 12, 2003Publication date: September 18, 2003Applicant: Mabuchi Motor Co., Ltd.Inventors: Ikuo Matsushita, Hideo Tamura, Kenji Tsuyama
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Publication number: 20030067226Abstract: In the case of a small-sized motor of the present invention, a printed board to which an electric circuit including an electric element is attached is mounted on a case cover. The printed board has a soldering part to be connected to a member attached to an interior of the case cover for being connected to an electric power source supplied from an outside and a soldering part to be connected to a projection in a notch provided on an opening part side of the metal case to body-earth the electric circuit. In the soldering part for the body-earthing, at the time of assembling the motor, after fitting the case cover to the metal case opening part, a pair of electrodes are brought into contact from an outside of the metal case near the soldering part, to weld the soldering part by a principle of the electric resistance welding.Type: ApplicationFiled: August 28, 2002Publication date: April 10, 2003Inventors: Ikuo Matsushita, Hideo Tamura, Kenji Tsuyama
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Patent number: 5982055Abstract: A miniature motor with a two-pole stator, and a rotor having three or more salient poles each having a core with flanges extending toward both sides thereof and a winding. The rotor is adapted to simulate a two-pole construction by cutting off at least the tip of a flange on either side on a part or all the salient rotor pole cores, thereby limiting the spontaneous-stop angular positions of the rotor to two. One insulating spacer is provided between a plurality of commutator segments of the commutator in such a positional relationship as to come in contact with one of the two brushes when the rotor is at a spontaneous-stop angular position. The motor is prevented from burning and restarting suddenly after a stop since the motor has a self-inactivating function by interrupting current supply at spontaneous-stop angular positions while maintaining motor torque by minimizing the angle of non-conduction to the rotor.Type: GrantFiled: March 5, 1998Date of Patent: November 9, 1999Assignee: Mabuchi Motor Co., Ltd.Inventors: Ikuo Matsushita, Fumiyoshi Itou, Megumu Onishi
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Patent number: 5412266Abstract: A miniature motor comprising a rotor having a plurality of magnetic poles extending axially, which is disposed radially on the outer circumferential surface of the rotor, and a stator having two coils wound on coil bobbins, which are disposed axially in a housing formed into a bottomed hollow cylindrical shape; an end plate being fitted to an open end of the housing, in which the housing is made of a ferromagnetic material, the magnetic poles are provided on a housing-side end face of the rotor so that an axial magnetic attraction force is exerted between the rotor end face and the housing.Type: GrantFiled: April 21, 1993Date of Patent: May 2, 1995Assignee: Mabuchi Motor Co. Ltd.Inventors: Akira Okazaki, Shinichi Matsuda, Takanobu Lee, Ikuo Matsushita, Masao Take
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Patent number: 5389846Abstract: A miniature motor is provided with a rotor having a plurality of magnetic poles extending axially, which are disposed radially on the outer circumferential surface thereof, and a stator having two coils wound on coil bobbins and disposed axially in a housing formed into a bottomed hollow cylindrical shape. An end plate is fitted to an open end of the housing, in which a current feeding connector is provided, and a printed circuit board having at board end prongs carrying bonding pieces for electrically connecting to the connectors is interposed between the coil bobbins. Coil ends are connected directly to the bonding pieces of the printed circuit board.Type: GrantFiled: April 16, 1993Date of Patent: February 14, 1995Assignee: Mabuchi Motor Co., Ltd.Inventors: Akira Okazaki, Takanobu Lee, Ikuo Matsushita, Masao Take
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Patent number: 5298826Abstract: A rotor for rotary electrical machinery comprising a permanent-magnet member made of a mixture having ferromagnetic material powder and a binder resin for chief ingredients, and a shaft, in which a recess whose projected contour on a plane orthogonally intersecting the axial line of the permanent-magnet member is of a non-circular shape is provided at least an end face of the permanent-magnet member, and a shaft is press-fit into a metallic bush fitted to the recess, thereby ensuring high coaxiality tolerance between the permanent-magnet member and the shaft, easy assembly and low manufacturing cost.Type: GrantFiled: November 20, 1992Date of Patent: March 29, 1994Assignee: Mabuchi Motor Co., Ltd.Inventors: Takanobu Lee, Ikuo Matsushita, Masao Take, Masahiro Mifune
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Patent number: 5298820Abstract: A miniature motor comprising a rotor having a plurality of axially extending magnetic poles disposed on the outer periphery thereof in the circumferential direction, and a stator having two axially disposed coils wound on coil bobbins, in which flanges whose outside diameter is larger than the outside diameter of hollow cylindrical coil cores are provided on both ends in the axial direction of the coil cores, the coil bobbins having on one of the flanges projections protruding toward the outside in the axial direction of the coil cores are disposed in such a manner that the projections are directed toward each other, and that the projection on one coil bobbin faces the coil core of the other coil bobbin.Type: GrantFiled: November 20, 1992Date of Patent: March 29, 1994Assignee: Mabuchi Motor Co., Ltd.Inventors: Takanobu Lee, Ikuo Matsushita, Masao Take, Masahiro Mifune
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Patent number: 5194772Abstract: An ac motor comprises a dc micromotor with terminals passing through an insulating end bell to receive dc current from a rectifier module. The flat surface of the end bell contains fixing grooves and a hole. The rectifier module is fitted within the hole. Fixing bosses are also provided on the end surface of the end bell. An input terminal plate is provided with holes for engaging the four bosses. The input terminal plate is provided with cut grooves which delimit four input terminal portions. The input terminal plate also has a middle hole. The input terminal plate is pressed into engagement with the four bosses resulting in the input terminal plate separating into four input terminal pieces, which are bent into the fixing grooves and also bent into the hole to fixedly fit the input terminal pieces to the end bell. Terminals of the rectifier module are electrically and mechanically connected to be held by the input terminal pieces.Type: GrantFiled: July 10, 1991Date of Patent: March 16, 1993Assignee: Mabuchi Motor Co., Ltd.Inventor: Ikuo Matsushita
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Patent number: 5157294Abstract: A miniature motor driven by a full-wave or half-wave rectified power source, having a stator of a two-pole field system using a permanent magnet as magnetic poles, a rotor comprising a winding wound on a four-pole core, and noise-suppressing capacitors disposed between adjoining core arms of the four-pole core of the rotor.Type: GrantFiled: July 19, 1991Date of Patent: October 20, 1992Assignee: Mabuchi Motor Co., Ltd.Inventor: Ikuo Matsushita
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Patent number: 5129740Abstract: A bearing device for miniature motors having a cylindrically-shaped bearing support formed by pressing an end face of a metallic motor case, and a bearing press-fitted into the bearing support to rotatably support a motor shaft, characterized in that a pressed groove is formed on the outer circumferential surface of the bearing support by pressing the outer circumferential surface is disclosed. A method of making a bearing device for miniature motor in which the clearance between the bearing and the motor shaft is set by pressing the outer circumferential surface of the bearing support using a pressing jig in a state where the motor shaft is inserted into the bearing is disclosed.Type: GrantFiled: February 5, 1991Date of Patent: July 14, 1992Assignee: Mabuchi Motor Co., Ltd.Inventors: Ikuo Matsushita, Michio Hoshino