Patents by Inventor Kazuyoshi Nakamura
Kazuyoshi Nakamura 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: 11976518Abstract: A drilling tip that is attached to a distal end surface of a tool main body of a drilling tool which is rotated around an axis and in which a striking force is applied to a distal end side in a direction of the axis. The drilling tip includes a tip main body in which a base end portion having a columnar shape and a distal end portion protruding from this base end portion to the distal end side are integrally formed. The distal end portion includes a curved convex surface-shaped portion protruding to the distal end side of the tip main body, and a projection portion protruding to the distal end side from a surface of the curved convex surface-shaped portion.Type: GrantFiled: January 17, 2020Date of Patent: May 7, 2024Assignee: MMC RYOTEC CORPORATIONInventors: Kazuyoshi Nakamura, Hiroki Takatsuki
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Patent number: 11945362Abstract: An aircraft lamp includes: a lamp outer housing configured by a lamp housing having an opening and a cover attached to the lamp housing in a state where the opening is closed, wherein an internal space is formed in the lamp housing as a first arrangement space; and a lamp unit that includes a light source module provided with a light source, an attaching base to which the light source module is attached, and a power receiving connector attached to the attaching base to supply power to the light source, wherein the lamp unit is configured to be detachable with respect to the lamp housing. The lamp housing includes an insertion hole communicating with the first arrangement space. The lamp housing is provided with an arrangement case portion having a second arrangement space opened on an outer surface side of the lamp housing.Type: GrantFiled: July 9, 2020Date of Patent: April 2, 2024Assignee: KOITO MANUFACTURING CO., LTD.Inventors: Kazuyoshi Nakamura, Takashi Yoda, Masaru Ishikiriyama
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Publication number: 20230034449Abstract: An operating device of a human-powered vehicle, the device including: an operation member; a base that is configured such that the operation member is provided to the base and at least a part of the base is embedded in a vehicle body of the human-powered vehicle; at least one interface; and a controller that is provided to the base and is electrically connected to the at least one interface, the controller being configured to cause the at least one interface to output a control command to a control-target in accordance with an operation of the operation member, wherein the controller is configured to be capable of changing at least one of the control-target and the control command.Type: ApplicationFiled: July 7, 2022Publication date: February 2, 2023Inventors: Kazuhiro FUJII, Hiroki KAMADA, Kazuyoshi NAKAMURA, Yuuya YONEDA
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Publication number: 20220290502Abstract: Deterioration in boring efficiency is curbed and the costs of repolishing are reduced by curbing wear-width progression of a distal end portion of a tip main body of a drilling tip. A drilling tip that is attached to a distal end surface of a tool main body of a drilling tool which is rotated around an axis and in which a striking force is applied to a distal end side in a direction of the axis. The drilling tip includes a tip main body (1) in which a base end portion (2) having a columnar shape and a distal end portion (3) protruding from this base end portion (2) to the distal end side are integrally formed.Type: ApplicationFiled: January 17, 2020Publication date: September 15, 2022Applicant: MMC RYOTEC CORPORATIONInventors: Kazuyoshi Nakamura, Hiroki Takatsuki
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Publication number: 20220281376Abstract: An aircraft lamp includes: a lamp outer housing configured by a lamp housing having an opening and a cover attached to the lamp housing in a state where the opening is closed, wherein an internal space is formed in the lamp housing as a first arrangement space; and a lamp unit that includes a light source module provided with a light source, an attaching base to which the light source module is attached, and a power receiving connector attached to the attaching base to supply power to the light source, wherein the lamp unit is configured to be detachable with respect to the lamp housing. The lamp housing includes an insertion hole communicating with the first arrangement space. The lamp housing is provided with an arrangement case portion having a second arrangement space opened on an outer surface side of the lamp housing.Type: ApplicationFiled: July 9, 2020Publication date: September 8, 2022Inventors: Kazuyoshi NAKAMURA, Takashi YODA, Masaru ISHIKIRIYAMA
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Patent number: 10851593Abstract: A drilling tool has: a casing pipe in a circular tubular shape; a cylindrical or annular ring bit rotatably fitted to a tip portion of the casing pipe; and a pilot bit inserted into an inner circumference of the ring bit for a striking force to be exerted to toward a tip end side, wherein the ring bit is engaged with and fitted to the casing pipe, projections are formed on an outer circumferential portion of the pilot bit, a recessed trench, and a housing trench, are formed in the inner circumferential part of the ring bit, a torque transmitting surface is formed in the projection, a torque receiving surface capable of abutting the torque transmitting surface is formed in the housing trench, striking force transmitting surfaces are formed in projections, and striking force receiving surfaces capable of abutting the striking force transmitting surfaces are formed in the ring bit.Type: GrantFiled: August 9, 2017Date of Patent: December 1, 2020Assignee: Mitsubishi Materials CorporationInventors: Kazuyoshi Nakamura, Yasutaka Tomita
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Publication number: 20190169938Abstract: A drilling tool has: a casing pipe in a circular tubular shape; a cylindrical or annular ring bit rotatably fitted to a tip portion of the casing pipe; and a pilot bit inserted into an inner circumference of the ring bit for a striking force to be exerted to toward a tip end side, wherein the ring bit is engaged with and fitted to the casing pipe, projections are formed on an outer circumferential portion of the pilot bit, a recessed trench, and a housing trench, are formed in the inner circumferential part of the ring bit, a torque transmitting surface is formed in the projection, a torque receiving surface capable of abutting the torque transmitting surface is formed in the housing trench, striking force transmitting surfaces are formed in projections, and striking force receiving surfaces capable of abutting the striking force transmitting surfaces are formed in the ring bit.Type: ApplicationFiled: August 9, 2017Publication date: June 6, 2019Inventors: Kazuyoshi Nakamura, Yasutaka Tomita
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Publication number: 20190003261Abstract: A drilling tool of the invention includes an air supply pipe inserted through an inner circumference of a drilling pipe having a tip portion on which a tool main body is disposed. The air supply pipe being configured to supply compressed air. A supply channel is provided on an outer circumference of the drilling pipe. A discharge channel is formed on the tip portion of the tool main body. The discharge channel is configured to discharge cuttings generated together with the drilling fluid into a space between the drilling pipe and the air supply pipe. An exhaust gas outlet opening into the space is formed at a tip portion of the air supply pipe.Type: ApplicationFiled: December 8, 2016Publication date: January 3, 2019Inventors: Kunihiko Tanaka, Kazuyoshi Nakamura, Yasutaka Tomita
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Patent number: 10107045Abstract: The drilling tool includes a circular-cylindrical casing pipe; an annular ring bit disposed at a leading end of the casing pipe so as to be coaxial with the casing pipe and rotatable around a central axis of the casing pipe; and a pilot bit inserted into the casing pipe and has a leading end disposed at an inner peripheral part of the ring bit. The ring bit is engaged with the pilot bit in a rotational direction, and thereby is rotatable integrally with the pilot bit and is locked to the leading end of the pilot bit. Drilling tips are mounted on the leading ends of the pilot bit and the ring bit, and first drilling tips at an outermost periphery of the pilot bit and second drilling tips at an innermost periphery of the ring bit overlap each other in a rotational trajectory around the central axis.Type: GrantFiled: March 10, 2015Date of Patent: October 23, 2018Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuyoshi Nakamura, Hiroshi Ota
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Patent number: 10006251Abstract: A digging bit includes a reaming portion whose diameter is larger than a rear end portion of a bit body, and which is formed in a front end portion of the bit body rotated around an axis, a digging tip which is arranged in a front end portion of the reaming portion, a debris groove which extends in a direction of an axis, and which is formed in an outer peripheral portion of the reaming portion, and a communication groove which communicates with the debris groove, and which is formed from the outer peripheral portion to a rear end portion of the reaming portion.Type: GrantFiled: March 3, 2014Date of Patent: June 26, 2018Assignee: MITSUBISHI MATERIALS CORPROATIONInventors: Kazuyoshi Nakamura, Hiroshi Ota
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Patent number: 9869134Abstract: The inner bit is provided with: a supply hole which is open at the distal end portion of the inner bit; and a discharge groove which is formed in an outer peripheral surface of the inner bit and extends in the direction of the axial line. The supply hole is provided with: a distal end blow hole which is open in a distal end surface of the distal end portion of the inner bit; and an outer peripheral blow hole which is open in an outer peripheral surface of the distal end portion of the inner bit. An outer peripheral groove via which the outer peripheral blow hole communicates with the discharge groove is formed in the outer peripheral surface of the inner bit. The outer peripheral groove is covered with the ring bit from the outside in a radial direction.Type: GrantFiled: March 6, 2014Date of Patent: January 16, 2018Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuyoshi Nakamura, Hiroshi Ota
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Publication number: 20170234075Abstract: A drilling tool of the present invention includes: a casing pipe; a ring bit having a larger diameter and disposed coaxially on a tip side of the casing pipe; and a pilot bit inserted into the ring bit through the inside of the casing pipe. An outer peripheral part at a tip of the pilot bit is provided with a bit head which is extended when rotated in a tool rotation direction during drilling. The ring bit is provided with a part to be engaged that is engaged with the extended bit head in the tool rotation direction, and a first abutting part capable of abutting against the extended bit head in a direction of an axis.Type: ApplicationFiled: August 11, 2015Publication date: August 17, 2017Inventors: Kazuyoshi Nakamura, Hiroki Takatsuki
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Publication number: 20170081923Abstract: The drilling tool includes a circular-cylindrical casing pipe; an annular ring bit disposed at a leading end of the casing pipe so as to be coaxial with the casing pipe and rotatable around a central axis of the casing pipe; and a pilot bi inserted into the casing pipe and has a leading end disposed at an inner peripheral part of the ring bit. The ring bit is engaged with the pilot bit in a rotational direction, and thereby is rotatable integrally with the pilot bit and is locked to the leading end of the pilot bit. Drilling tips are mounted on the leading ends of the pilot bit and the ring bit, and first drilling tips at an outermost periphery of the pilot bit and second drilling tips at an innermost periphery of the ring bit overlap each other in a rotational trajectory around the central axis.Type: ApplicationFiled: March 10, 2015Publication date: March 23, 2017Inventors: Kazuyoshi Nakamura, Hiroshi Ota
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Patent number: 9551190Abstract: In an excavation tool of the present invention, an embedding hole is drilled in a distal end portion of a tool body which is rotated about an axis line O and is moved forward to a distal end side in a direction of the axis line O. In the embedding hole, an excavation tip in which an embedding portion having an outer cylindrical shape is formed integrally with a cutting edge portion inserts the embedding portion into the embedding hole and causes the cutting edge portion to protrude from the embedding hole. In this manner, the excavation tip is rotatable around a central axis C of the embedding portion during excavation, and is attached thereto by being locked so as not to slip toward a distal end side of the embedding portion 6 in a direction of the central axis C.Type: GrantFiled: November 30, 2012Date of Patent: January 24, 2017Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Yoneo Hiwasa, Masaya Hisada, Kazuyoshi Nakamura
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Patent number: 9428964Abstract: An excavating tool includes a casing pipe that forms a cylindrical shape about an axis line and in which a stepped portion whose inner diameter is decreased by one step is formed in an inner peripheral portion of an distal end; an inner bit where a contact portion which can come into contact with the stepped portion is formed in an outer periphery, which is inserted into the casing pipe, and whose distal end portion protrudes from a distal end of the casing pipe; an engagement convex portion that is disposed on the outer periphery of the distal end portion of the inner bit so as to be retractable; a ring bit that forms an annular shape and is arranged around the distal end portion of the inner bit; and an engagement concave portion that is formed in an inner peripheral portion of the ring bit.Type: GrantFiled: December 6, 2012Date of Patent: August 30, 2016Assignee: MITSUBISHI MATERIALS CORPORATIONInventors: Masaya Hisada, Kazuyoshi Nakamura
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Publication number: 20160002979Abstract: A digging bit includes a reaming portion whose diameter is larger than a rear end portion of a bit body, and which is formed in a front end portion of the bit body rotated around an axis, a digging tip which is arranged in a front end portion of the reaming portion, a debris groove which extends in a direction of an axis, and which is formed in an outer peripheral portion of the reaming portion, and a communication groove which communicates with the debris groove, and which is formed from the outer peripheral portion to a rear end portion of the reaming portion.Type: ApplicationFiled: March 3, 2014Publication date: January 7, 2016Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuyoshi NAKAMURA, Hiroshi OTA
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Publication number: 20160002983Abstract: The inner bit is provided with: a supply hole which is open at the distal end portion of the inner bit; and a discharge groove which is formed in an outer peripheral surface of the inner bit and extends in the direction of the axial line. The supply hole is provided with: a distal end blow hole which is open in a distal end surface of the distal end portion of the inner bit; and an outer peripheral blow hole which is open in an outer peripheral surface of the distal end portion of the inner bit. An outer peripheral groove via which the outer peripheral blow hole communicates with the discharge groove is formed in the outer peripheral surface of the inner bit. The outer peripheral groove is covered with the ring bit from the outside in a radial direction.Type: ApplicationFiled: March 6, 2014Publication date: January 7, 2016Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Kazuyoshi Nakamura, Hiroshi Ota
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Publication number: 20150300094Abstract: An excavating tool includes a casing pipe that forms a cylindrical shape about an axis line and in which a stepped portion whose inner diameter is decreased by one step is formed in an inner peripheral portion of an distal end; an inner bit where a contact portion which can come into contact with the stepped portion is formed in an outer periphery, which is inserted into the casing, and whose distal end portion protrudes from a distal end of the casing pipe; an engagement convex portion that is disposed on the outer periphery of the distal end portion of the inner bit so as to be retractable; a ring bit that forms an annular shape and is arranged around the distal end portion of the inner bit; and an engagement concave portion that is formed in an inner peripheral portion of the ring bit.Type: ApplicationFiled: December 6, 2012Publication date: October 22, 2015Applicant: MITSUBISHI MATERIALS CORPORATIONInventors: Masaya Hisada, Kazuyoshi Nakamura
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Publication number: 20140311808Abstract: In an excavation tool of the present invention, an embedding hole is drilled in a distal end portion of a tool body which is rotated about an axis line O and is moved forward to a distal end side in a direction of the axis line O. In the embedding hole, an excavation tip in which an embedding portion having an outer cylindrical shape is formed integrally with a cutting edge portion inserts the embedding portion into the embedding hole and causes the cutting edge portion to protrude from the embedding hole. In this manner, the excavation tip is rotatable around a central axis C of the embedding portion during excavation, and is attached thereto by being locked so as not to slip toward a distal end side of the embedding portion 6 in a direction of the central axis C.Type: ApplicationFiled: November 30, 2012Publication date: October 23, 2014Inventors: Yoneo Hiwasa, Masaya Hisada, Kazuyoshi Nakamura
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Patent number: 8803398Abstract: A coreless electric machine includes: a permanent magnet on a first member; N-phase (N?2) air-core electromagnetic coils on a second member; and a coil back yoke on the second member, each electromagnetic coil including a conductor bundle in which a conductor is wound M times (M?2), coil sub-aggregates are provided, each including the N electromagnetic coils of the respective N phases and in each of which a conductor bundle forming an effective coil area of a first-phase electromagnetic coil contacts a second conductor bundle forming an effective coil area of another phase electromagnetic coil, and the second conductor bundle is in an air-core portion of the first phase electromagnetic coil, and the coil sub-aggregates are arranged along the cylindrical area, in which the coil sub-aggregates do not overlap in a radiation direction of the cylindrical area, and adjacent coil sub-aggregates contact each other.Type: GrantFiled: May 30, 2012Date of Patent: August 12, 2014Assignee: Seiko Epson CorporationInventors: Kesatoshi Takeuchi, Kazuyoshi Nakamura