Patents by Inventor Tatsuya Yamasaki
Tatsuya Yamasaki 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: 20180106997Abstract: A housing for an optical element has a first holding surface contact holding a first surface of an optical element and a second holding surface contact holding a ridge line separated from the first surface of the optical element. A first pressing member presses the optical element toward the first holding surface, and a second pressing member presses the optical element toward the second holding surface. An intersection angle obtained by extrapolating and extending the first and second holding surfaces is an acute angle, and a first pressing position at which the first pressing member presses on the optical element is closer to the second holding surface than to a center of the optical element. A second pressing position at which the second pressing member presses on the optical element is farther from the first holding surface than from the center of the optical element.Type: ApplicationFiled: September 25, 2017Publication date: April 19, 2018Inventors: Manabu OCHI, Tatsuya YAMASAKI, Atsushi KAZAMA, Fumihito ICHIKAWA
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Patent number: 9937689Abstract: In a method for manufacturing a polarizing film comprising a polarizer, a first transparent protective film provided on one surface of the polarizer with an adhesive layer interposed therebetween, and a second transparent protective film provided on another surface of the polarizer with an adhesive layer interposed therebetween, the adhesive layers are obtained by first using active energy rays to carry out irradiation by way of the first transparent protective film and then using the active energy rays to carry out irradiation by way of the second transparent protective film to cure the active energy ray-curable adhesive composition.Type: GrantFiled: March 12, 2014Date of Patent: April 10, 2018Assignee: NITTO DENKO CORPORATIONInventors: Takeshi Saito, Masashi Shinagawa, Tetsurou Ikeda, Tatsuya Yamasaki, Toshiki Oomine, Shunsuke Shuto, Kentarou Kunishima, Makoto Tsuchinaga
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Publication number: 20180079403Abstract: The electric brake device includes an electric motor, a friction member operator, a friction member, a brake rotor, and a control device. A braking force estimator provided in the control device includes: a direct estimator configured to convert output of a braking force sensor which detects a load or displacement corresponding amount, to a braking force; and an indirect estimator configured to estimate the braking force on the basis of information other than output of the braking force sensor. A range in which the braking force is estimated by the direct estimator is a specified low-braking-force range, and in a range beyond this range, estimation of the braking force is performed by the indirect estimator.Type: ApplicationFiled: November 29, 2017Publication date: March 22, 2018Applicant: NTN CORPORATIONInventors: Yui Masuda, Tatsuya Yamasaki
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Publication number: 20180007325Abstract: To provide an optical module and a scan-type image projection display device at low power consumption in a configuration of enhancing a heat radiation property with excellent assembly performance. An optical module for coupling and irradiating laser beams from a plurality of laser diodes, and onto a desired position is characterized in that a first protruded part corresponding to a first laser holder for holding a first laser diode 1a and a second protruded part corresponding to a second laser holder for holding a second laser diode are provided on a base for placing the optical module thereon, and heat conductive materials are provided between the first protruded part and the first laser holder and between the second protruded part and the second laser holder, respectively.Type: ApplicationFiled: January 4, 2016Publication date: January 4, 2018Applicant: HITACHI-LG DATA STORAGE, INC.Inventors: Seiichi KATOU, Ayano OTSUBO, Tatsuya YAMASAKI, Hiroshi OGASAWARA, Kenji WATABE, Yasuhiro YOSHIMURA
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Publication number: 20170359556Abstract: In an optical module and a scanning-type image display device, a reduction in heat insulating effect due to a natural convection generated between the optical module and a case is suppressed to alleviate laser overheating and thermal expansion or contraction of each component and obtain a stable projection image quality. In an optical module that couples laser beams from a plurality of laser beam sources 1a, 1b, 1c and irradiates the laser beams to a desired position, a cover that covers the optical module is provided, a second cover is provided in a space between the optical module and the cover, and a projecting part is provided on a surface of the second cover facing the optical module.Type: ApplicationFiled: February 10, 2016Publication date: December 14, 2017Applicant: HITACHI-LG DATA STORAGE, INC.Inventors: Yasuhiro YOSHIMURA, Ayano OTSUBO, Seiichi KATOU, Hiroshi OGASAWARA, Tatsuya YAMASAKI, Kenji WATABE
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Publication number: 20170306197Abstract: A curable resin composition for forming an adhesive layer on at least one surface of a substrate (C), the curable resin composition comprising: a compound (A) represented by formula (1): wherein X represents a functional group containing a reactive group, and R1 and R2 each independently represent a hydrogen atom or an optionally substituted, aliphatic hydrocarbon, aryl, or heterocyclic group; and an adhesion aid compound (B), the curable resin composition satisfying formula (X): ?10?HSP (A)?HSP (B)?10 and formula (Y): ?10?HSP (C)?HSP (B)?10, wherein HSP (A) is an HSP value of the compound (A), HSP (B) is an HSP value of the adhesion aid compound (B), and HSP (C) is an HSP value of the substrate (C).Type: ApplicationFiled: April 20, 2017Publication date: October 26, 2017Inventors: Kayo SHIMOKAWA, Ryoko ASAI, Taiki SHIMOKURI, Yoshiaki ITO, Tatsuya YAMASAKI
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Publication number: 20170180688Abstract: A scanning image display device is provided that can display high-quality images even with variation in environmental conditions at a place where the device is installed. The scanning image display device includes: a laser light source that emits laser light based on image information; a scanning mirror that scans the laser light emitted from the laser light source to projecr an image on a projection plane; a housing that holds the laser light source and the scanning mirror; and a container formed of a base and an outer cover that accommodates the housing and is internally sealed, wherein the outer cover has a thin-wall portion that is elastically deformed with variation in pressure within the container.Type: ApplicationFiled: December 7, 2016Publication date: June 22, 2017Inventors: Ayano OTSUBO, Takanori AONO, Hiroshi OGASAWARA, Tatsuya YAMASAKI, Kenji WATABE
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Publication number: 20170108067Abstract: The electric brake device includes an electric motor, a brake rotor, a friction pad, a conversion mechanism, a braking force command section, a braking force estimation section, a controller, and a power supply device. The controller includes: a power determination section to determine whether an amount of remaining power that can be supplied from a power supply device to the electric motor has become equal to or less than a determined value; and a residual pressure cancellation section to cancel a residual pressure of a braking force by driving the electric motor in a direction opposite to a brake pressing direction such that an estimated value of the braking force obtained by the braking force estimation section becomes equal to or less than a set value, when the power determination section determines that the amount of remaining power has become equal to or less than the determined value.Type: ApplicationFiled: December 29, 2016Publication date: April 20, 2017Applicant: NTN CORPORATIONInventors: Yui MASUDA, Tatsuya YAMASAKI
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Patent number: 9574630Abstract: An electric linear motion actuator includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.Type: GrantFiled: October 8, 2015Date of Patent: February 21, 2017Assignee: NTN CorporationInventors: Makoto Muramatsu, Masaaki Eguchi, Tatsuya Yamasaki, Tomomi Goto
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Publication number: 20160342076Abstract: In a laser light source module, a light source disposed on a base with a temperature adjusting element therebetween is covered by an inner cover, and is hermetically sealed by an outer cover. A top plate of the inner cover divides the inside of the outer cover into upper and lower sections and covers the light source from above. Side plates cover the side portions of the light source. Partitioning grid plates are provided in a space between the top plate and the outer cover, the partitioning grid plates dividing the space into multiple spaces.Type: ApplicationFiled: January 16, 2015Publication date: November 24, 2016Inventors: Seiichi KATOU, Ayano OTSUBO, Tatsuya YAMASAKI, Hiroshi OGASAWARA, Kenji WATABE
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Publication number: 20160288778Abstract: An electric brake device includes an electric motor; a braking force application mechanism configured to apply a braking force on a vehicle wheel; a lock mechanism configured to assume one of a locked condition; a temperature sensor configured to measure an ambient temperature of a vehicle; and a freezing preventive power supply unit configured to initiate supply of an electric power to the electric motor or a drive source of the lock mechanism. The freezing preventive power supply unit interrupts the supply of the electric power to the electric motor or the drive source of the lock mechanism when the temperature detected by the temperature sensor exceeds a second preset temperature T2 that is higher than a first preset temperature T1.Type: ApplicationFiled: June 14, 2016Publication date: October 6, 2016Applicant: NTN CORPORATIONInventors: Makoto MURAMATSU, Yuuki SAOYAMA, Tatsuya YAMASAKI, Masaaki EGUCHI, Yui MASUDA
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Patent number: 9435411Abstract: A linear motion actuator includes an outer ring member mounted in a housing, a rotary shaft rotated by a motor, planetary rollers mounted between the outer ring member and the shaft and supported by a carrier rotatable about the shaft. A helical rib is formed on the inner surface of the outer ring member which is engaged in helical grooves formed in outer surfaces of the planetary rollers. When the shaft rotates, the planetary rollers rotate and revolve, thereby axially moving the outer ring member. Uneven axial loads applied to the planetary rollers from the outer ring member are supported by thrust bearings disposed between the planetary rollers and an inner disk of the carrier. Aligning seats are provided between each opposed pair of the planetary rollers and the thrust bearings such that the contact surfaces of the aligning seats shift relative to each other under the uneven axial loads.Type: GrantFiled: January 12, 2012Date of Patent: September 6, 2016Assignee: NTN CORPORATIONInventors: Masaaki Eguchi, Makoto Muramatsu, Tatsuya Yamasaki, Makoto Yasui
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Patent number: 9429487Abstract: A magnetic load sensor unit for use in a linear motion actuator is provided which is less likely to suffer from hysteresis errors during use while being mounted in the linear motion actuator, and which can reduce the axial length of the linear motion actuator. The magnetic load sensor unit is configured to detect the magnitude of an axial load applied to an object from the linear motion actuator. The sensor unit includes a flange member configured to be deflected when a reaction force to the axial load is received through a thrust bearing, a magnetic target which generates magnetic fields; and a magnetic sensor arranged such that its position relative to the magnetic target changes when the flange member is deflected. The flange member has an axial end surface in which a groove is formed with which rolling elements of the thrust bearing are in rolling contact.Type: GrantFiled: October 2, 2012Date of Patent: August 30, 2016Assignee: NTN CORPORATIONInventors: Yui Masuda, Tatsuya Yamasaki, Makoto Muramatsu
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Patent number: 9421959Abstract: An electric brake device includes an electric motor, a braking force application mechanism, a lock mechanism, a temperature sensor for measuring an ambient temperature of a vehicle in which the electric brake device is provided, and a freezing preventive power supply unit. The freezing preventive power supply unit initiates the supply of an electric power to the electric motor or a drive source of the lock mechanism in the event that while the braking force application mechanism applies a braking force and the lock mechanism is held in a locked condition, the temperature sensor detects a preset temperature of the electric brake device immediately before freezing.Type: GrantFiled: August 7, 2012Date of Patent: August 23, 2016Assignee: NTN CORPORATIONInventors: Makoto Muramatsu, Yuuki Saoyama, Tatsuya Yamasaki, Masaaki Eguchi, Yui Masuda
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Publication number: 20160201777Abstract: It is an object of the present invention to improve seal performance in an electric linear motion actuator configured to linearly drive a linear motion member due to the rotation of a rotary shaft. The linear motion member is constituted by a cylindrical member slidably fitted in a housing, and a pressing member coupled to the distal end portion of the cylindrical member so as to close the opening of the distal end of the cylindrical member. The portion of the pressing member coupled to the cylindrical member is located inside of a boot sealing the space between the distal end portion of the housing and the distal end portion of the linear motion member.Type: ApplicationFiled: August 26, 2014Publication date: July 14, 2016Inventor: Tatsuya YAMASAKI
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Patent number: 9369024Abstract: A linear motion actuator has an output member that can be smoothly moved linearly even when lateral moment acts on the output member. A carrier (6) supporting planetary rollers (7) is axially immovable, while an outer ring member (5), as the output member, is axially slidably fitted in the radially inner surface of a cylindrical portion (1a) of a housing (1), and is rotationally fixed to a driven member through keys (22). Hard plating layers are formed on the radially outer surface of a rotary shaft (4), the radially outer surfaces of the planetary rollers (7), including helical grooves (7a), and the surface of a helical rib member (5b) which is fixed to the radially inner surface of the outer ring member (5) forming a helical rib.Type: GrantFiled: February 14, 2011Date of Patent: June 14, 2016Assignee: NTN CORPORATIONInventors: Tatsuya Yamasaki, Masaaki Eguchi
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Patent number: 9353837Abstract: An electric linear motion actuator includes: a rotary shaft to be driven by an electric motor; a plurality of planetary rollers kept in rolling contact with a cylindrical surface formed on an outer periphery of the rotary shaft; a carrier which retains the planetary rollers such that the planetary rollers are rotatable about axes thereof while revolving around the rotary shaft, and of which axial movement is restricted; and an outer ring member surrounding the planetary rollers and supported so as to be slidable in an axial direction. Helical ribs are formed on an inner periphery of the outer ring member; and circumferential grooves are formed on an outer periphery of each of the planetary rollers so as to be engaged with the helical ribs. A rotation of the rotary shaft is thus converted to a linear motion of the outer ring member.Type: GrantFiled: October 31, 2012Date of Patent: May 31, 2016Assignee: NTN CORPORATIONInventors: Tatsuya Yamasaki, Yui Masuda, Makoto Muramatsu, Masaaki Eguchi, Yuki Saoyama
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Publication number: 20160131212Abstract: The electric linear motion actuator includes an electric motor, a drive shaft configured to be rotated by the electric motor, a rotation-to-linear motion converting mechanism configured to convert the rotational motion of the drive shaft to the axial linear motion of an axially movably supported outer ring member, and an electric locking mechanism incorporated in a reduction gear mechanism in which the rotation of a rotor shaft of the electric motor is reduced in speed and transmitted to the drive shaft. When the electric locking mechanism is energized, the power transmission path shifts to the locked state in which power cannot be transmitted, and when the electric locking mechanism is de-energized thereafter, the power transmission path is kept in the locked state. The electric locking mechanism is built in a motor case of the electric motor so that the electric motor and the electric locking mechanism are unitized.Type: ApplicationFiled: June 12, 2014Publication date: May 12, 2016Applicant: NTN CorporationInventors: Tatsuya YAMASAKI, Makoto MURAMATSU, Yui MASUDA
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Publication number: 20160033122Abstract: An optical module having a high-moisture-proof package structure in which dew condensation does not occur is provided. An optical module includes optical components including a light source, a pedestal on which the optical components are mounted, a cover which is combined to the pedestal to seal the optical components, and an emitting window disposed in the cover to take light from the light source outside. The pedestal and the cover are sealed with an O ring and a liquid seal material such that a compression direction of the O ring and a compression direction of the liquid seal material are almost perpendicular to each other.Type: ApplicationFiled: July 10, 2015Publication date: February 4, 2016Inventors: Yukio SAKIGAWA, Masayuki OKAMURA, Hiroaki FURUICHI, Hiroshi OGASAWARA, Kenji WATABE, Fumihito ICHIKAWA, Tatsuya YAMASAKI
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Publication number: 20160025170Abstract: An electric linear motion actuator includes planetary rollers mounted between the radially inner surface of an outer ring member and the radially outer surface of a rotary shaft, and a carrier rotatable about the rotary shaft and including radially movable roller shafts rotatably supporting the respective planetary rollers. Elastic rings each having circumferentially separate ends are each wrapped around the roller shafts to radially inwardly bias the roller shafts, thereby bringing the respective planetary rollers into elastic contact with the radially outer surface of the rotary shaft. Each elastic ring is prevented from rotating relative to the roller shafts, thereby preventing one of the roller shafts from being axially aligned with the gap between the circumferential separate ends, causing the elastic ring to be radially compressed and thus making it impossible for the elastic rings to radially bias the roller shafts.Type: ApplicationFiled: October 8, 2015Publication date: January 28, 2016Applicant: NTN CORPORATIONInventors: Makoto MURAMATSU, Masaaki EGUCHI, Tatsuya YAMASAKI, Tomomi GOTO