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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Patent number: 10508722Abstract: An electric linear motion actuator is provided which includes an outer ring member, a rotary shaft, planetary rollers, and a carrier including a disk, and in which the outer ring member is formed with a helical rib, each of the planetary rollers being formed with circumferential grooves in which the helical rib is engaged. When the rotary shaft rotates, the planetary rollers rotate about their axes while revolving around the rotary shaft so that the outer ring member axially linearly moves. The actuator includes thrust roller and retainer assemblies each mounted between one of the planetary roller and the disk of the carrier, and each guided by a raceway, i.e., an end surface of the corresponding planetary roller. The actuator includes a common raceway disk common to all of the thrust roller and retainer assemblies, and mounted between the thrust roller and retainer assemblies and the disk of the carrier.Type: GrantFiled: November 4, 2015Date of Patent: December 17, 2019Assignee: NTN CORPORATIONInventors: Tatsuya Yamasaki, Masaaki Eguchi
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Patent number: 10479342Abstract: 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: GrantFiled: November 29, 2017Date of Patent: November 19, 2019Assignee: NTN CORPORATIONInventors: Yui Masuda, Tatsuya Yamasaki
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Publication number: 20190339139Abstract: A load sensor used in an electromechanical brake system is provided. The load sensor includes a flange member capable of deflecting when receiving, at a load receiving portion, a load from the axially front side; a support member capable of supporting the flange member from the axially rear side, at a support portion displaced from the load receiving portion in a radial direction orthogonal to the axial direction; a displacement detecting mechanism configured to detect the amount of relative movement between the flange and support members; and a variable detection sensitivity mechanism enabling the relative movement amount with respect to the change of the load applied to the flange member to be larger in a low load range in which the load is equal to or lower than a predetermined load value than in a high load range in which the load is higher than the predetermined load value.Type: ApplicationFiled: December 26, 2017Publication date: November 7, 2019Applicant: NTN CORPORATIONInventors: Tatsuya YAMASAKI, Yui MASUDA
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Publication number: 20190293851Abstract: A polarizing film, comprising a polarizer, and a transparent protective film laminated on/over at least one surface of the polarizer to interpose an adhesive layer between the surface and the transparent protective film, and the polarizing film comprising, on/over the adhesion surface of the polarizer, an adhesion-improving layer interposed between the polarizer and the adhesive layer. The adhesion-improving layer preferably comprises a compound represented by the following general formula (1): wherein X is a functional group containing a reactive group, and R1 and R2 each independently represent a hydrogen atom, or an aliphatic hydrocarbon group, aryl group or heterocyclic group that may have a substituent, and the compound represented by the general formula (1) is interposed between the polarizer and the adhesive layer.Type: ApplicationFiled: May 16, 2017Publication date: September 26, 2019Applicant: NITTO DENKO CORPORATIONInventors: Ryo Kanno, Takeshi Saito, Tatsuya Yamasaki, Keisuke Kimura
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Patent number: 10371369Abstract: 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: GrantFiled: July 10, 2015Date of Patent: August 6, 2019Assignee: HITACHI-LG DATA STORAGE, INC.Inventors: Yukio Sakigawa, Masayuki Okamura, Hiroaki Furuichi, Hiroshi Ogasawara, Kenji Watabe, Fumihito Ichikawa, Tatsuya Yamasaki
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Patent number: 10352383Abstract: 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: GrantFiled: December 29, 2016Date of Patent: July 16, 2019Assignee: NTN CORPORATIONInventors: Yui Masuda, Tatsuya Yamasaki
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Patent number: 10334213Abstract: 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 project 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: GrantFiled: December 7, 2016Date of Patent: June 25, 2019Assignee: Hitachi-LG Data Storage, Inc.Inventors: Ayano Otsubo, Takanori Aono, Hiroshi Ogasawara, Tatsuya Yamasaki, Kenji Watabe
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Publication number: 20190137675Abstract: A laminated resin film, comprising a first resin film, and a second resin film laminated on/over at least one surface of the first resin film to interpose an adhesive layer between the surface and the second resin film, wherein an adhesion surface of at least one of the first resin film and the second resin film comprises a compound represented by general formula (1): wherein X is a functional group containing a reactive group, and R1 and R2 each independently represent a hydrogen atom, or an aliphatic hydrocarbon group, aryl group or heterocyclic group that may have a substituent, and the compound represented by the general formula (1) is interposed at either one or both of a position between the first resin film and the adhesive layer, and a position between the second resin film and the adhesive layer.Type: ApplicationFiled: May 16, 2017Publication date: May 9, 2019Applicant: NITTO DENKO CORPORATIONInventors: Ryo Kanno, Takeshi Saito, Tatsuya Yamasaki, Keisuke Kimura
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Publication number: 20190128351Abstract: In an electric linear motion actuator, while an axially forward load is not being applied to an object by an outer ring member, a preload is applied to a frictionally coupling surface by an elastic member, and, when the axially forward load is applied to the object by the outer ring member, an axial load applied to the frictionally coupling surface decreases by an amount equal to the axially rearward reaction force which the outer ring member receives from the object. The electric linear motion actuator includes a load sensor for supporting, through planetary rollers and a carrier, the axially rearward reaction force. The load sensor is arranged such that any change in magnitude of an axially forward load applied through a snap ring will not affect the value of the axially rearward reaction force detected by the load sensor.Type: ApplicationFiled: May 24, 2017Publication date: May 2, 2019Applicant: NTN CORPORATIONInventor: Tatsuya YAMASAKI
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Patent number: 10228034Abstract: An electric linear motion actuator includes an outer ring member provided around a central shaft, and planetary rollers disposed between the central shaft and the outer ring member. One of the central shaft and the outer ring member serves as an input member which is rotatable and immovable in the axial direction and rotated by an electric motor, while the other serves as an output member which is rotationally stationary and movable in the axial direction. The input member has a peripheral surface formed with a plurality of annular ribs which are equal in pitch. Each planetary roller has a radially outer surface formed with annular grooves which are equal in pitch to the annular ribs and in which the annular ribs are engaged. The output member has a peripheral surface formed with a helical rib which is equal in pitch to the annular grooves of the planetary rollers.Type: GrantFiled: August 27, 2013Date of Patent: March 12, 2019Assignee: NTN CorporationInventor: Tatsuya Yamasaki
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Patent number: 10215265Abstract: 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: GrantFiled: August 26, 2014Date of Patent: February 26, 2019Assignee: NTN CORPORATIONInventor: Tatsuya Yamasaki
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Publication number: 20190055432Abstract: A curing type adhesive composition for polarization film, contains an active energy ray curable component (X), at least one organometallic compound (A) selected from the group consisting of a metal alkoxide and a metal chelate, and a polymerizable compound (B) having a polymerizable functional group and a carboxyl group. It is preferred that a metal of the organometallic compound (A) is titanium. The curing type adhesive composition for polarizing film preferably contains, as the organometallic compound (A), the metal alkoxide, and an organic group which the metal alkoxide has having three or more carbon atoms. The curing type adhesive composition for polarizing film contains, as the organometallic compound (A), the metal chelate, an organic group which the metal chelate has having four or more carbon atoms.Type: ApplicationFiled: September 29, 2016Publication date: February 21, 2019Applicant: NITTO DENKO CORPORATIONInventors: Ryo Kanno, Tatsuya Yamasaki, Yuto Saruhashi, Ryuta Tomoyose, Takeshi Saito, Tetsuro Ikeda
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Patent number: 10209610Abstract: 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: GrantFiled: January 16, 2015Date of Patent: February 19, 2019Assignee: Hitachi-LG Data Storage, Inc.Inventors: Seiichi Katou, Ayano Otsubo, Tatsuya Yamasaki, Hiroshi Ogasawara, Kenji Watabe
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Publication number: 20190031794Abstract: A curable resin composition, comprising a compound A represented by the following general formula (1): wherein X is a functional group containing a hydrogen donor group, and R1 and R2 each independently represent a hydrogen atom, or an aliphatic hydrocarbon group, aryl group or heterocyclic group that may have a substituent; a radical polymerization initiator B having a hydrogen withdrawing effect; and one or more radical polymerizable compounds C.Type: ApplicationFiled: January 25, 2017Publication date: January 31, 2019Applicant: NITTO DENKO CORPORATIONInventors: Tatsuya YAMASAKI, Takeshi SAITO, Ryo KANNO
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Patent number: 10148920Abstract: 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: GrantFiled: February 10, 2016Date of Patent: December 4, 2018Assignee: Hitachi-LG Data Storage, Inc.Inventors: Yasuhiro Yoshimura, Ayano Otsubo, Seiichi Katou, Hiroshi Ogasawara, Tatsuya Yamasaki, Kenji Watabe
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Publication number: 20180313438Abstract: An electric linear motion actuator is provided which includes an outer ring member, a rotary shaft, planetary rollers, and a carrier including a disk, and in which the outer ring member is formed with a helical rib, each of the planetary rollers being formed with circumferential grooves in which the helical rib is engaged. When the rotary shaft rotates, the planetary rollers rotate about their axes while revolving around the rotary shaft so that the outer ring member axially linearly moves. The actuator includes thrust roller and retainer assemblies each mounted between one of the planetary roller and the disk of the carrier, and each guided by a raceway, i.e., an end surface of the corresponding planetary roller. The actuator includes a common raceway disk common to all of the thrust roller and retainer assemblies, and mounted between the thrust roller and retainer assemblies and the disk of the carrier.Type: ApplicationFiled: November 4, 2015Publication date: November 1, 2018Applicant: NTN CORPORATIONInventors: Tatsuya YAMASAKI, Masaaki EGUCHI
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Patent number: 10086815Abstract: 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: GrantFiled: June 14, 2016Date of Patent: October 2, 2018Assignee: NTN CORPORATIONInventors: Makoto Muramatsu, Yuuki Saoyama, Tatsuya Yamasaki, Masaaki Eguchi, Yui Masuda
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Publication number: 20180265526Abstract: An organic metal compound-containing composition, comprising: at least one organic metal compound (A) selected from the group consisting of metal alkoxides and metal chelates, and a polymerizable compound (B) having a polymerizable functional group and a carboxyl group.Type: ApplicationFiled: September 29, 2016Publication date: September 20, 2018Applicant: NITTO DENKO CORPORATIONInventors: Ryo Kanno, Tatsuya Yamasaki, Yuto Saruhashi, Ryuta Tomoyose, Takeshi Saito, Tetsuro Ikeda
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Publication number: 20180194333Abstract: Provided is an electric brake device capable of adjusting a clearance without making a driver feel discomfort, in a vehicle equipped with the electric brake device. A control device (2) of this electric brake device (DB) includes: a brake operation amount detector (24) to detect an operation amount to a brake operation member (27) of the vehicle; and an operation record flag storage unit (19) to store an operation record flag indicating a record of a latest operation performed by the driver to the brake operation member (27), on the basis of the operation amount detected by the brake operation amount detector (24). The control device (2) further includes a target clearance determination unit (17) to determine a target clearance with reference to the operation record flag stored in the operation record flag storage unit (19).Type: ApplicationFiled: March 8, 2018Publication date: July 12, 2018Applicant: NTN CORPORATIONInventors: Akiyoshi NISHIKAWA, Tatsuya Yamasaki
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Publication number: 20180176524Abstract: The laser projection display device includes a scanning mirror reflecting and two-dimensionally scanning a laser beam emitted from a laser light source and sensors detecting rotation angles of the scanning mirror, and controls driving of the scanning mirror on the basis of sensor signals output from the sensors. At this time, a temperature compensation unit compensates for temperature dependency of a transfer characteristic of a signal transmission line for transmitting the sensor signals according to a temperature measured by a thermometer arranged in the vicinity of the scanning mirror. In order to correct amplitudes and phases of the rotation angles of the scanning mirror obtained from the sensor signal, the temperature compensation unit includes a look-up table storing correction amounts for each temperature.Type: ApplicationFiled: October 23, 2017Publication date: June 21, 2018Inventors: Tomoki KOBORI, Tatsuya YAMASAKI, Junji NAKAJIMA, Katsuhiko KIMURA, Takanori AONO