Patents by Inventor Kiyoharu Nakamura
Kiyoharu 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: 10935078Abstract: A motor that ensures efficient supply of a lubricating oil to a mechanical seal and a bearing to reduce temperature rise in driving of a motor is provided. The motor includes a mechanical seal through which a rotary shaft of a rotor is inserted. The mechanical seal includes a seal ring and a mating ring. The seal ring has a sealing surface. The mating ring is secured to the rotary shaft. The mating ring has a sealing surface that contacts the sealing surface of the seal ring. The mating ring has a through hole on an outer edge side of the mating ring with respect to the sealing surface of the mating ring. The lubricating oil flows through the through hole to the bearing side.Type: GrantFiled: May 10, 2019Date of Patent: March 2, 2021Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kiyoharu Nakamura
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Publication number: 20190360531Abstract: A motor that ensures efficient supply of a lubricating oil to a mechanical seal and a bearing to reduce temperature rise in driving of a motor is provided. The motor includes a mechanical seal through which a rotary shaft of a rotor is inserted. The mechanical seal includes a seal ring and a mating ring. The seal ring has a sealing surface. The mating ring is secured to the rotary shaft. The mating ring has a sealing surface that contacts the sealing surface of the seal ring. The mating ring has a through hole on an outer edge side of the mating ring with respect to the sealing surface of the mating ring. The lubricating oil flows through the through hole to the bearing side.Type: ApplicationFiled: May 10, 2019Publication date: November 28, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kiyoharu NAKAMURA
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Publication number: 20180048216Abstract: A motor according to as aspect of the present invention includes a cylindrical rotor and a stator disposed so as to surround an outer peripheral surface of the rotor. The stator includes a stator core including a plurality of teeth radially arranged about a rotation axis of the rotor; and a stator coil inserted between each adjacent pair of the teeth. A flow channel for supplying a coolant to the outer peripheral surface of the rotor is formed within the teeth, and a projection part is provided at a tip face of each of the teeth facing the outer peripheral surface of the rotor in such a manner that an interval between the tip face of each of the teeth and the outer peripheral surface of the rotor gradually decreases in a rotation direction of the rotor.Type: ApplicationFiled: August 10, 2017Publication date: February 15, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kiyoharu NAKAMURA
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Patent number: 8505507Abstract: A flow rate control valve includes a housing having an accommodation chamber in communication with oil passages, and a spool accommodated in the accommodation chamber movably in a reciprocating manner. The housing includes a bolt for fastening a movable member of a variable valve timing mechanism, and a sleeve inserted in an insertion portion provided in the bolt and having the accommodation chamber. The bolt is provided with a port through which the oil passages communicate with the insertion portion. The sleeve is provided with a through hole penetrating the sleeve. Furthermore, an annular protrusion and a recess are provided as a phase adjustment portion that adjusts a phase of rotation of the sleeve with respect to the bolt to a phase in which the port coincides in position with the through hole and holds the phase of rotation of the sleeve with respect to the bolt equal thereto.Type: GrantFiled: June 1, 2011Date of Patent: August 13, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kiyoharu Nakamura, Jyunji Yokota
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Patent number: 8186318Abstract: To provide a variable valve operating apparatus for an internal combustion engine which can reduce a range where heat treatment is required, thereby favorably suppressing distortion which occurs in a camshaft during heat treatment, to a low level. A changeover mechanism is provided which includes a slide pin which is adapted to move within a predetermined reciprocating range thereby switching between operational states of a variable mechanism, and a guide rail provided in an outer peripheral surface of the camshaft and guides the movement of the slide pin from one end to a remaining end of the reciprocating range. A projection part which is engageable with the guide rail is provided in the slide pin.Type: GrantFiled: March 12, 2009Date of Patent: May 29, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Hirotaka Sunada, Kiyoharu Nakamura, Shinobu Shimasaki, Motohiro Tsuzuki, Yusuke Kato
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Patent number: 8162794Abstract: A rotation/linear motion conversion mechanism provided with an annular shaft, a sun shaft arranged inside the annular shaft, planetary shafts arranged around the sun shaft, and a first gear mechanism and a second gear mechanism, which transmit force between the annular shaft and the planetary shafts. Each planetary shaft includes a first planetary gear, which configures part of the first gear mechanism, and a second gear, which configures part of the second gear mechanism. The planetary shaft is configured to permit relative rotation between the first planetary gear and the second planetary gear.Type: GrantFiled: June 22, 2007Date of Patent: April 24, 2012Assignees: Toyota Jidosha Kabushiki Kaisha, Denso CorporationInventors: Kohei Hori, Hiromichi Hashimoto, Yasuo Kinoshita, Kiyoharu Nakamura, Motohiro Tsuzukui, Osamu Satoh
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Publication number: 20110303169Abstract: A flow rate control valve includes a housing having an accommodation chamber in communication with oil passages, and a spool accommodated in the accommodation chamber movably in a reciprocating manner. The housing includes a bolt for fastening a movable member of a variable valve timing mechanism, and a sleeve inserted in an insertion portion provided in the bolt and having the accommodation chamber. The bolt is provided with a port through which the oil passages communicate with the insertion portion. The sleeve is provided with a through hole penetrating the sleeve. Furthermore, an annular protrusion and a recess are provided as a phase adjustment portion that adjusts a phase of rotation of the sleeve with respect to the bolt to a phase in which the port coincides in position with the through hole and holds the phase of rotation of the sleeve with respect to the bolt equal thereto.Type: ApplicationFiled: June 1, 2011Publication date: December 15, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kiyoharu NAKAMURA, Jyunji YOKOTA
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Patent number: 8037606Abstract: A method for fabricating a rotational-to-linear motion conversion mechanism which can avoid a planetary shaft from being tilted with respect to a sun shaft when the conversion mechanism is assembled. The method includes fabricating a subassembly with the planetary shaft being held in parallel to the sun shaft. The subassembly includes the sun shaft having a first and second sun gear at its opposing ends and a male thread at its center, the planetary shaft having a first planetary gear at its one end and a male thread at its center, a ring shaft having a female thread, and a first and second ring gear. The method also includes mating the second planetary gear with the second sun gear and the second ring gear while the second planetary gear is being fitted over the outer circumferential surface of the other end of the planetary shaft in the subassembly.Type: GrantFiled: June 22, 2007Date of Patent: October 18, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventor: Kiyoharu Nakamura
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Publication number: 20110214636Abstract: To provide a variable valve operating apparatus for an internal combustion engine which can reduce a range where heat treatment is required, thereby favorably suppressing distortion which occurs in a camshaft during heat treatment, to a low level. A changeover mechanism is provided which includes a slide pin which is adapted to move within a predetermined reciprocating range thereby switching between operational states of a variable mechanism, and a guide rail provided in an outer peripheral surface of the camshaft and guides the movement of the slide pin from one end to a remaining end of the reciprocating range. A projection part which is engageable with the guide rail is provided in the slide pin.Type: ApplicationFiled: March 12, 2009Publication date: September 8, 2011Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hirotaka Sunada, Kiyoharu Nakamura, Shinobu Shimasaki, Motohiro Tsuzuki, Yusuke Kato
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Publication number: 20090288509Abstract: A rotation/linear motion conversion mechanism provided with an annular shaft, a sun shaft arranged inside the annular shaft, planetary shafts arranged around the sun shaft, and a first gear mechanism and a second gear mechanism, which transmit force between the annular shaft and the planetary shafts. Each planetary shaft includes a first planetary gear, which configures part of the first gear mechanism, and a second gear, which configures part of the second gear mechanism. The planetary shaft is configured to permit relative rotation between the first planetary gear and the second planetary gear.Type: ApplicationFiled: June 22, 2007Publication date: November 26, 2009Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, DENSO CORPORATIONInventors: Kohei Hori, Hiromichi Hashimoto, Yasuo Kinoshita, Kiyoharu Nakamura, Motohiro Tsuzukui, Osamu Satoh
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Patent number: 7500725Abstract: A hydraulic braking pressure control unit including three or more hydraulic pressure control components, and a holder structure which holds those hydraulic pressure control components, wherein the three or more hydraulic pressure control components are selected from electromagnetically operated hydraulic pressure control valves capable of controlling a pressure of a working fluid in a brake cylinder in a braking system, and pressure detecting devices, to detect respective pressures of the fluid used to control the electromagnetically operated hydraulic pressure control valves. The three or more hydraulic pressure control components include three hydraulic pressure control components which are attached to the holder structure such that one of the three hydraulic pressure control components is spaced from the other two hydraulic pressure control components by substantially the same distance.Type: GrantFiled: March 9, 2007Date of Patent: March 10, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventors: Akihiro Otomo, Kiyoharu Nakamura
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Publication number: 20080222892Abstract: A method for fabricating a rotational-to-linear motion conversion mechanism which can avoid a planetary shaft from being tilted with respect to a sun shaft when the conversion mechanism is assembled. The method includes fabricating a subassembly with the planetary shaft being held in parallel to the sun shaft. The subassembly includes the sun shaft having a first and second sun gear at its opposing ends and a male thread at its center, the planetary shaft having a first planetary gear at its one end and a male thread at its center, a ring shaft having a female thread, and a first and second ring gear. The method also includes mating the second planetary gear with the second sun gear and the second ring gear while the second planetary gear is being fitted over the outer circumferential surface of the other end of the planetary shaft in the subassembly.Type: ApplicationFiled: June 22, 2007Publication date: September 18, 2008Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kiyoharu Nakamura
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Patent number: 7406931Abstract: An internal combustion engine is provided with a plurality of valves, including a main driving valve and a driven valve, each of which can be lifted in response to an instruction from a control apparatus, and a lift sensor which detects a lift amount of the main driving valve. The control apparatus controls the lift of the driven and main driving valves based on an output of the lift sensor. The engine may also include a proximity sensor which detects whether the position of the driven valve is within a predetermined range, and a crank angle sensor. The control apparatus monitors the output of the proximity sensor to determine whether the driven valve is out of synchronization with respect to the crank angle, and performs an initial driving control that initializes the positions of the driven and main driving valves corresponding to the driven valve when loss of synchronization is detected.Type: GrantFiled: May 22, 2006Date of Patent: August 5, 2008Assignee: Toyota Jidosha Kabushiki KaishaInventor: Kiyoharu Nakamura
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Patent number: 7306196Abstract: The electromagnet includes a valve-opening side coil portion supplied with a current to thereby generate a first magnetic flux and generate electromagnetic force in a direction moving the valve-opening side moving element toward a valve-opening position, and a valve-closing side coil portion supplied with a current to thereby generate a second magnetic flux and generate electromagnetic force in a direction moving the valve-closing side moving element toward the valve-closing position. The valve-opening side coil portion and the valve-closing side coil portion are constituted of an identical connection. The electromagnet further has a sub-coil constituted of a separate connection from the valve-opening side coil portion and the valve-closing side coil portion. By the current supply to the sub-coil, a third magnetic flux reducing at least one of the first magnetic flux and the second magnetic flux is generated.Type: GrantFiled: May 30, 2006Date of Patent: December 11, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kiyoharu Nakamura, Yutaka Sugie
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Publication number: 20070159002Abstract: A hydraulic braking pressure control unit including three or more hydraulic pressure control components, and a holder structure which holds those hydraulic pressure control components, wherein the three or more hydraulic pressure control components are selected from electromagnetically operated hydraulic pressure control valves capable of controlling a pressure of a working fluid in a brake cylinder in a braking system, and pressure detecting devices, to detect respective pressures of the fluid used to control the electromagnetically operated hydraulic pressure control valves. The three or more hydraulic pressure control components include three hydraulic pressure control components which are attached to the holder structure such that one of the three hydraulic pressure control components is spaced from the other two hydraulic pressure control components by substantially the same distance.Type: ApplicationFiled: March 9, 2007Publication date: July 12, 2007Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akihiro Otomo, Kiyoharu Nakamura
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Patent number: 7204566Abstract: A hydraulic braking pressure control unit including three or more hydraulic pressure control components, and a holder structure which holds those hydraulic pressure control components, wherein the three or more hydraulic pressure control components are selected from electromagnetically operated hydraulic pressure control valves capable of controlling a pressure of a working fluid in a brake cylinder in a braking system, and pressure detecting devices, to detect respective pressures of the fluid used to control the electromagnetically operated hydraulic pressure control valves. The three or more hydraulic pressure control components include three hydraulic pressure control components which are attached to the holder structure such that one of the three hydraulic pressure control components is spaced from the other two hydraulic pressure control components by substantially the same distance.Type: GrantFiled: April 8, 2002Date of Patent: April 17, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Akihiro Otomo, Kiyoharu Nakamura
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Publication number: 20070012268Abstract: An internal combustion engine is provided with a plurality of valves, including a main driving valve and a driven valve, each of which can be lifted in response to an instruction from a control apparatus, and a lift sensor which detects a lift amount of the main driving valve. The control apparatus controls the lift of the driven and main driving valves based on an output of the lift sensor. The engine may also include a proximity sensor which detects whether the position of the driven valve is within a predetermined range, and a crank angle sensor. The control apparatus monitors the output of the proximity sensor to determine whether the driven valve is out of synchronization with respect to the crank angle, and performs an initial driving control that initializes the positions of the driven and main driving valves corresponding to the driven valve when loss of synchronization is detected.Type: ApplicationFiled: May 22, 2006Publication date: January 18, 2007Inventor: Kiyoharu Nakamura
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Patent number: 7156366Abstract: An electromagnetically driven valve device is formed by attaching a lower core assy, an armature, an upper core assy, and an upper case in that order from bottom, to a cylinder head of an engine. Each of the lower core assy and the upper core assy is unitarily formed so as to have a predetermined shape by resin-molding a core and a coil that form an electromagnet as well as an armature bearing, etc. The lower core assy is fastened together with the upper core assy to the cylinder head, and is thus attached to the mounting surface.Type: GrantFiled: October 15, 2003Date of Patent: January 2, 2007Assignee: Toyota Jidosha Kabushiki KaishaInventors: Takeshi Sakuragi, Takashi Izuo, Masahiko Asano, Kiyoharu Nakamura, Yutaka Sugie
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Publication number: 20060272603Abstract: An electromagnetically driven valve includes a valve-opening side moving element and a valve-closing side moving element having rotatably supported support portions and carrying out oscillating movement between a valve-opening position and a valve-closing position around the support portions respectively, and an electromagnet having a coil implemented by a monocoil and arranged between the valve-opening side moving element and the valve-closing side moving element. The valve-opening side moving element and the valve-closing side moving element are held at a position intermediate between the valve-opening position and the valve-closing position while electromagnetic force is not applied. Magnetic permeability of a material forming the valve-opening side moving element is different from that of a material forming the valve-closing side moving element. According to such a structure, an electromagnetically driven valve with a simplified structure, of which initial drive is facilitated, is provided.Type: ApplicationFiled: May 31, 2006Publication date: December 7, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventor: Kiyoharu Nakamura
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Publication number: 20060272602Abstract: The electromagnet includes a valve-opening side coil portion supplied with a current to thereby generate a first magnetic flux and generate electromagnetic force in a direction moving the valve-opening side moving element toward a valve-opening position, and a valve-closing side coil portion supplied with a current to thereby generate a second magnetic flux and generate electromagnetic force in a direction moving the valve-closing side moving element toward the valve-closing position. The valve-opening side coil portion and the valve-closing side coil portion are constituted of an identical connection. The electromagnet further has a sub-coil constituted of a separate connection from the valve-opening side coil portion and the valve-closing side coil portion. By the current supply to the sub-coil, a third magnetic flux reducing at least one of the first magnetic flux and the second magnetic flux is generated.Type: ApplicationFiled: May 30, 2006Publication date: December 7, 2006Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kiyoharu Nakamura, Yutaka Sugie