Patents by Inventor Takumi Karasawa
Takumi Karasawa 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: 20240118969Abstract: A storage controller performs a storage write operation, and stores being unable to write due to memory cell deterioration in cases in which bit flips uncorrectable by an ECC have been detected a predetermined number of times or more for each predetermined volume written and also writing of a TBW or greater has been confirmed.Type: ApplicationFiled: September 22, 2023Publication date: April 11, 2024Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Junichiro TAMAO, Takahiro UTSUNOMIYA, Takumi HORIE, Tomoaki KARASAWA
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Patent number: 11798585Abstract: A disk drive suspension of the embodiments includes a load beam, and a flexure including a mounting portion on which a slider is mounted and overlapping with the load beam. The load beam includes a tab further extending than the mounting portion longitudinal direction of the load beam. The tab is shaped in an arc such that a central portion in a lateral direction protrudes with respect to both end portions in the lateral direction, in the load beam. Each of the both end portions includes a flat surface parallel to the lateral direction.Type: GrantFiled: September 30, 2022Date of Patent: October 24, 2023Assignee: NHK SPRING CO., LTD.Inventors: Takumi Karasawa, Naoki Iwamoto, Sei Kawao, Tomoharu Imai
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Publication number: 20230108526Abstract: A disk drive suspension of the embodiments includes a load beam, and a flexure including a mounting portion on which a slider is mounted and overlapping with the load beam. The load beam includes a tab further extending than the mounting portion longitudinal direction of the load beam. The tab is shaped in an arc such that a central portion in a lateral direction protrudes with respect to both end portions in the lateral direction, in the load beam. Each of the both end portions includes a flat surface parallel to the lateral direction.Type: ApplicationFiled: September 30, 2022Publication date: April 6, 2023Applicant: NHK SPRING CO., LTD.Inventors: Takumi KARASAWA, Naoki IWAMOTO, Sei KAWAO, Tomoharu IMAI
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Patent number: 10204648Abstract: A flexure chain blank sheet includes frame units. Each frame unit includes a frame portion, and flexure elements. The flexure element includes a distal end portion, and an extending portion. The frame portion includes a pair of lengthwise frames and a pair of lateral frames. The first lateral frame connects between tail portions of the flexure elements. The second lateral frame is formed of a distal end linking portion which is constituted by connecting between respective adjacent extending portions. The distal end linking portion includes first cut-off portions to be cut along a longitudinal direction between the adjacent extending portions, and second cut-off portions to be cut along a width direction between the distal end portion and the extending portion.Type: GrantFiled: September 28, 2015Date of Patent: February 12, 2019Assignee: NHK SPRING CO., LTD.Inventors: Yukie Yamada, Takumi Karasawa
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Patent number: 10134432Abstract: A flexure chain blank sheet includes a plurality of frame units. Each of the frame units includes a frame portion, and a plurality of flexure elements arranged within the frame portion. The frame portion includes lengthwise frames extending in a longitudinal direction of the flexure elements, and lateral frames extending in a width direction of the flexure elements. A slit that extends along the lateral frames, a connection portion, and recesses are formed between adjacent frame units. An opening width of the recesses is greater than an opening width of the slit. The connection portion includes a portion-to-be-cut which is to be cut by a cutter. The recesses allow insertion of the cutter.Type: GrantFiled: September 28, 2015Date of Patent: November 20, 2018Assignee: NHK SPRING CO., LTD.Inventors: Yukie Yamada, Takumi Karasawa
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Publication number: 20160111116Abstract: A flexure chain blank sheet includes a plurality of frame units. Each of the frame units includes a frame portion, and a plurality of flexure elements arranged within the frame portion. The frame portion includes lengthwise frames extending in a longitudinal direction of the flexure elements, and lateral frames extending in a width direction of the flexure elements. A slit that extends along the lateral frames, a connection portion, and recesses are formed between adjacent frame units. An opening width of the recesses is greater than an opening width of the slit. The connection portion includes a portion-to-be-cut which is to be cut by a cutter. The recesses allow insertion of the cutter.Type: ApplicationFiled: September 28, 2015Publication date: April 21, 2016Applicant: NHK SPRING CO., LTD.Inventors: Yukie YAMADA, Takumi KARASAWA
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Publication number: 20160111117Abstract: A flexure chain blank sheet includes frame units. Each frame unit includes a frame portion, and flexure elements. The flexure element includes a distal end portion, and an extending portion. The frame portion includes a pair of lengthwise frames and a pair of lateral frames. The first lateral frame connects between tail portions of the flexure elements. The second lateral frame is formed of a distal end linking portion which is constituted by connecting between respective adjacent extending portions. The distal end linking portion includes first cut-off portions to be cut along a longitudinal direction between the adjacent extending portions, and second cut-off portions to be cut along a width direction between the distal end portion and the extending portion.Type: ApplicationFiled: September 28, 2015Publication date: April 21, 2016Applicant: NHK SPRING CO., LTD.Inventors: Yukie YAMADA, Takumi KARASAWA
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Patent number: 7983006Abstract: A suspension has a load beam and a flexure having a tongue portion to which a slider is attached. The load beam has a pin insertion hole formed between a proximal portion of the load beam and the slider and an opening formed between a distal portion of the load beam and the slider. A first locating pin is inserted into the pin insertion hole, and a second locating pin into the opening. An extending portion is formed on a distal portion of the flexure. The flexure has a first locating hole in which the first locating pin is inserted and a second locating hole in which the second locating pin is inserted. The second locating hole is formed in the extending portion.Type: GrantFiled: July 16, 2007Date of Patent: July 19, 2011Assignee: NHK Spring Co., Ltd.Inventors: Tetsuya Fujiwara, Noriyuki Saito, Takumi Karasawa
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Patent number: 7889460Abstract: A slider supporting apparatus is provided with a flexure formed of a metal plate having spring characteristics. The flexure comprises a gimbals portion including a tongue, a first support portion which supports one longitudinal end of a slider, a second support portion which supports the other end of the slider, and a spring portion composed of a pair of flat springs. Convexes and concaves of each flat spring are alternately formed along a surface direction of the flexure by etching. The flat springs extend to a length which allows the slider to be inserted between the support portions when subjected to a tensile load, and contract to a length such that the slider can be held between the support portions when subjected to no tensile load.Type: GrantFiled: May 1, 2007Date of Patent: February 15, 2011Assignee: NHK Spring Co., Ltd.Inventors: Masao Hanya, Toshiki Ando, Takumi Karasawa
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Patent number: 7791840Abstract: In the manufacture of a load beam for reading and writing a hard disk in a hard disk drive which load beam has a body having a slope extending from a front end thereof and bent along a bend line in a direction opposite to the hard disk, a tab protruding from the slope and to be guided on a guide of the hard disk drive, and a box-bent portion extending along each side edge of the body and slope and passing through an end of the bend line. A first stage is preparing a load beam material that is flat and has a deformation control zone on a section to be processed into the box-bent portion of the load beam material corresponding to the section to be processed into the bend line so as to prevent the box-bent portion from deforming and protruding when the box-bent portion is formed.Type: GrantFiled: February 21, 2007Date of Patent: September 7, 2010Assignee: NHK Spring Co., Ltd.Inventors: Takashi Horiuchi, Takumi Karasawa
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Patent number: 7636221Abstract: A head suspension for a hard disk drive is capable of improving shock property of the hard disk drive while miniaturizing the hard disk drive. A head suspension has a base plate to be attached to a carriage and turned around a spindle of the carriage, a load beam which includes a beam and a hinge, a base end of the beam being supported to the base plate through the hinge and which applies a load onto a head for writing and reading data to and from a disk at a front end side thereof, and a flexure which connects the head to writing and reading wires and supports the head and which is attached to the load beam, where the hinge is set to be relatively thicker than the beam so that the load beam is made thin and the load is increased.Type: GrantFiled: April 13, 2006Date of Patent: December 22, 2009Assignee: NHK Spring Co., Ltd.Inventors: Eiji Watadani, Masao Hanya, Takumi Karasawa
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Publication number: 20080049360Abstract: A suspension has a load beam and a flexure having a tongue portion to which a slider is attached. The load beam has a pin insertion hole formed between a proximal portion of the load beam and the slider and an opening formed between a distal portion of the load beam and the slider. A first locating pin is inserted into the pin insertion hole, and a second locating pin into the opening. An extending portion is formed on a distal portion of the flexure. The flexure has a first locating hole in which the first locating pin is inserted and a second locating hole in which the second locating pin is inserted. The second locating hole is formed in the extending portion.Type: ApplicationFiled: July 16, 2007Publication date: February 28, 2008Applicant: NHK Spring Co., Ltd.Inventors: Tetsuya Fujiwara, Noriyuki Saito, Takumi Karasawa
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Publication number: 20070263325Abstract: A slider supporting apparatus is provided with a flexure formed of a metal plate having spring characteristics. The flexure comprises a gimbals portion including a tongue, a first support portion which supports one longitudinal end of a slider, a second support portion which supports the other end of the slider, and a spring portion composed of a pair of flat springs. Convexes and concaves of each flat spring are alternately formed along a surface direction of the flexure by etching. The flat springs extend to a length which allows the slider to be inserted between the support portions when subjected to a tensile load, and contract to a length such that the slider can be held between the support portions when subjected to no tensile load.Type: ApplicationFiled: May 1, 2007Publication date: November 15, 2007Applicant: NHK Spring Co., Ltd.Inventors: Masao Hanya, Toshiki Ando, Takumi Karasawa
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Publication number: 20070193024Abstract: In the manufacture of a load beam for reading and writing a hard disk in a hard disk drive which load beam has a body having a slope extending from a front end thereof and bent along a bend line in a direction opposite to the hard disk, a tab protruding from the slope and to be guided on a guide of the hard disk drive, and a box-bent portion extending along each side edge of the body and slope and passing through an end of the bend line. A first stage is preparing a load beam material that is flat and has a deformation control zone on a section to be processed into the box-bent portion of the load beam material corresponding to the section to be processed into the bend line so as to prevent the box-bent portion from deforming and protruding when the box-bent portion is formed.Type: ApplicationFiled: February 21, 2007Publication date: August 23, 2007Applicant: NHK SPRING CO., LTD.Inventors: Takashi Horiuchi, Takumi Karasawa
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Patent number: 7133259Abstract: A head suspension for a disk drive has a base (19) to be attached to a carriage, a load beam (21) having a rigid part (27) and a resilient part (29) supported by the base, to apply load on a data read/write head (13) arranged at a front end (27a) of the rigid part, and a flexure (49) attached to the load beam and supporting the head. The rigid part has a multilayer structure consisting of at least three layers including metal layers (28a, 28b) and a resin layer (28c) interposed between the metal layers. The number of layers of the resilient part is smaller than that of the rigid part.Type: GrantFiled: May 14, 2002Date of Patent: November 7, 2006Assignee: NHK Spring Co., Ltd.Inventors: Yasuji Takagi, Osamu Iriuchijima, Masao Hanya, Tsukasa Higashi, Takumi Karasawa
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Publication number: 20060232887Abstract: A head suspension for a disk drive is capable of improving shock property of the hard disk drive while miniaturizing the hard disk drive. A head suspension has a base plate to be attached to a carriage and turned around a spindle of the carriage, a load beam which includes a beam and a hinge, a base end of the beam being supported to the base plate through the hinge and which applies a load onto a head for writing and reading data to and from a disk at a front end side thereof, and a flexure which connects the head to writing and reading wires and supports the head and which is attached to the load beam, where the hinge is set to be relatively thicker than the beam so that the load beam is made thin and the load is increased.Type: ApplicationFiled: April 13, 2006Publication date: October 19, 2006Applicant: NHK SPRING CO., LTD.Inventors: Eiji Watadani, Masao Hanya, Takumi Karasawa
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Patent number: 6956720Abstract: A head suspension for a disk drive has a load beam, a base plate, and a recess. The base plate has a thin flange and is capable of improving the attaching accuracy and strength of the head suspension to a carriage arm of the disk drive. The base plate has the flange and a boss. The flange has a contact face to be attached to a contact face of the carriage arm. The boss is inserted into a hole of the carriage arm and plastically deformed therein to fix the base plate to the carriage arm. The load beam has a rigid part and a resilient part and is supported by the base plate, to apply load on a slider arranged at a front end of the load beam. The recess is formed on the base plate along a corner between the flange and the boss, to secure a gap relative to the contact face of the carriage arm.Type: GrantFiled: December 31, 2002Date of Patent: October 18, 2005Assignee: NHK Spring Co., Ltd.Inventors: Yasuji Takagi, Takumi Karasawa, Hidenori Ogawa
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Publication number: 20030128473Abstract: A head suspension for a disk drive has a load beam, a base plate, and a recess. The base plate has a thin flange and is capable of improving the attaching accuracy and strength of the head suspension to a carriage arm of the disk drive.Type: ApplicationFiled: December 31, 2002Publication date: July 10, 2003Applicant: NHK SPRING CO., LTD.Inventors: Yasuji Takagi, Takumi Karasawa, Hidenori Ogawa
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Publication number: 20020181155Abstract: A head suspension for a disk drive has a base (19) to be attached to a carriage, a load beam (21) having a rigid part (27) and a resilient part (29) supported by the base, to apply load on a data read/write head (13) arranged at a front end (27a) of the rigid part, and a flexure (49) attached to the load beam and supporting the head. The rigid part has a multilayer structure consisting of at least three layers including metal layers (28a, 28b) and a resin layer (28c) interposed between the metal layers. The number of layers of the resilient part is smaller than that of the rigid part.Type: ApplicationFiled: May 14, 2002Publication date: December 5, 2002Applicant: NHK Spring Co., Ltd.Inventors: Yasuji Takagi, Osamu Iriuchijima, Masao Hanya, Tsukasa Higashi, Takumi Karasawa
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Patent number: 5178570Abstract: A manufacturing method of cathode ray tube, wherein the voltage applied to the anode of an electron gun is divided by a voltage divider for application to focusing electrodes of the electron gun in the knocking process.Type: GrantFiled: June 24, 1991Date of Patent: January 12, 1993Assignee: Hitachi, Ltd.Inventors: Kozo Tomiyama, Taira Yarita, Takashi Shimokawa, Yukio Kuribayashi, Yasutoshi Katsume, Takumi Karasawa