Patents by Inventor Takamitsu Tsuna
Takamitsu Tsuna 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: 11489217Abstract: Disclosed herein is a battery pack that includes: a plurality of thin cells arranged in a matrix form in a first direction and a second direction perpendicular to the first direction, wherein a width of each thin cell in the first direction is smaller than widths of each thin cell in the second direction and a third direction perpendicular to the first and second directions, and wherein each of the thin cells has a surface substantially perpendicular to the first direction; a heat insulating member that insulates heat between the thin cells adjacent in the first direction; and a heat conducting member that contacts in common the surfaces of the thin cells arranged in the second direction.Type: GrantFiled: January 9, 2020Date of Patent: November 1, 2022Assignee: TDK CORPORATIONInventors: Hideyo Morita, Takamitsu Tsuna
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Publication number: 20200243935Abstract: Disclosed herein is a battery pack that includes: a plurality of thin cells arranged in a matrix form in a first direction and a second direction perpendicular to the first direction, wherein a width of each thin cell in the first direction is smaller than widths of each thin cell in the second direction and a third direction perpendicular to the first and second directions, and wherein each of the thin cells has a surface substantially perpendicular to the first direction; a heat insulating member that insulates heat between the thin cells adjacent in the first direction; and a heat conducting member that contacts in common the surfaces of the thin cells arranged in the second direction.Type: ApplicationFiled: January 9, 2020Publication date: July 30, 2020Inventors: Hideyo MORITA, Takamitsu TSUNA
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Publication number: 20110204744Abstract: A rotor core includes a body made of a soft magnetic material powder, the body being rotatable about a predetermined rotation axis; plural arms formed integral with the body from the soft magnetic material powder, the arms projecting toward an outside of the body in a diameter direction of the body and being provided with a coil; and salient poles formed integral with the arms from the soft magnetic material powder, the poles being mounted at the side of the respective arms reverse to the body.Type: ApplicationFiled: February 16, 2011Publication date: August 25, 2011Applicant: TDK CORPORATIONInventors: Takamitsu TSUNA, Atsushi GOTO
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Patent number: 7161765Abstract: An object of the invention is to provide a write/read head supporting mechanism for a magnetic disk system or optical disk system having a microactuator for effecting a micro-displacement of a slider, wherein any electrostatic breakdown of an electromagnetic transducer element or an optical module is prevented without detriment to the displacement capability of the microactuator. The write/read head supporting mechanism of the invention comprises a slider 2 provided with an electromagnetic transducer element or an optical module, and a suspension 3. The slider 2 is supported on the suspension 3 by way of a microactuator 4 for displacing the slider 2. A ground region that the suspension 3 has is electrically connected to the slider 2 by way of an electrical connecting member 8 movable and/or deformable in the displacement direction of the slider 2 by the microactuator 4.Type: GrantFiled: July 25, 2005Date of Patent: January 9, 2007Assignee: TDK CorporationInventors: Shinji Ichikawa, Yoshikazu Soeno, Takamitsu Tsuna
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Patent number: 7050266Abstract: An object of the invention is to provide a write/read head supporting mechanism for a magnetic disk system or optical disk system having a microactuator for effecting a micro-displacement of a slider, wherein any electrostatic breakdown of an electromagnetic transducer element or an optical module is prevented without detriment to the displacement capability of the microactuator. The write/read head supporting mechanism of the invention comprises a slider 2 provided with an electromagnetic transducer element or an optical module, and a suspension 3. The slider 2 is supported on the suspension 3 by way of a microactuator 4 for displacing the slider 2. A ground region that the suspension 3 has is electrically connected to the slider 2 by way of an electrical connecting member 8 movable and/or deformable in the displacement direction of the slider 2 by the microactuator 4.Type: GrantFiled: August 1, 2003Date of Patent: May 23, 2006Assignee: TDK CorporationInventors: Shinji Ichikawa, Yoshikaza Soeno, Takamitsu Tsuna
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Publication number: 20050254172Abstract: An object of the invention is to provide a write/read head supporting mechanism for a magnetic disk system or optical disk system having a microactuator for effecting a micro-displacement of a slider, wherein any electrostatic breakdown of an electromagnetic transducer element or an optical module is prevented without detriment to the displacement capability of the microactuator. The write/read head supporting mechanism of the invention comprises a slider 2 provided with an electromagnetic transducer element or an optical module, and a suspension 3. The slider 2 is supported on the suspension 3 by way of a microactuator 4 for displacing the slider 2. A ground region that the suspension 3 has is electrically connected to the slider 2 by way of an electrical connecting member 8 movable and/or deformable in the displacement direction of the slider 2 by the microactuator 4.Type: ApplicationFiled: July 25, 2005Publication date: November 17, 2005Applicant: TDK CORPORATIONInventors: Shinji Ichikawa, Yoshikazu Soeno, Takamitsu Tsuna
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Patent number: 6744603Abstract: The object of the present invention is to provide a write/read head supporting mechanism for a magnetic or optical disk system having a micro-displacement actuator, by which any impediment to the displacement capability of the actuator is eliminated. A write/read head supporting mechanism comprises a slider provided with an electromagnetic transducer element or an optical module, and a suspension. The slider is supported on suspension by way of an actuator for displacing slider. An electrical connection to the electromagnetic transducer element or said optical module is made by a first interconnecting arrangement movable and/or deformable in the displacement direction of slider by actuator, and an electrical connection to actuator is made by a second interconnecting arrangement.Type: GrantFiled: July 13, 2000Date of Patent: June 1, 2004Assignee: TDK CorporationInventors: Yoshikazu Soeno, Takamitsu Tsuna, Shinji Ichikawa, Masashi Shiraishi, Takeshi Wada
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Publication number: 20040022169Abstract: An object of the invention is to provide a write/read head supporting mechanism for a magnetic disk system or optical disk system having an actuator for effecting a micro-displacement of a slider, wherein any electrostatic breakdown of an electromagnetic transducer element or an optical module is prevented without detriment to the displacement capability of the actuator. The write/read head supporting mechanism of the invention comprises a slider 2 provided with an electromagnetic transducer element or an optical module, and a suspension 3. The slider 2 is supported on the suspension 3 by way of an actuator 4 for displacing the slider 2. A ground region that the suspension 3 has is electrically connected to the slider 2 by way of an electrical connecting member 8 movable and/or deformable in the displacement direction of the slider 2 by the actuator 4.Type: ApplicationFiled: August 1, 2003Publication date: February 5, 2004Applicant: TDK CORPORATIONInventors: Shinji Ichikawa, Yoshikaza Soeno, Takamitsu Tsuna
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Patent number: 6680820Abstract: A method of maintaining a constant flying height of a magnetic head: adapted to maintain a flying height of a magnetic head on a magnetic disk substantially constant irrespective of a change of a skew angle, utilizing a device comprising a magnetic disk, a positioning device, a head supporting device and a magnetic head; said positioning device supporting one end of said head supporting device and rotating the head supporting device on a first plane placed on a second plane of said magnetic disk within a predetermined skew angle range; the head supporting device supporting said magnetic head at the other end thereof; the magnetic head being attached with reading/writing elements at an air discharge end of a slider having flying planes on a side of a third plane thereof opposing the magnetic disk; a thickness of said slider from each of the flying planes to an opposite surface on the reverse side thereof being 0.Type: GrantFiled: June 3, 2002Date of Patent: January 20, 2004Assignee: TDK CorporationInventors: Mikio Matsuzaki, Kazumasa Fukuda, Takamitsu Tsuna
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Patent number: 6621661Abstract: A write/read head supporting mechanism including a slider having an electromagnetic transducer element or an optical module, a suspension for supporting the slider and including a ground region, and a microactuator disposed between the slider and the suspension for displacing said slider. Further, at least a part of the microactuator includes an electrically conductive region, and the ground region of the suspension is electrically connected to the slider by the electrically conductive region of the microactuator, such that the slider is grounded so as to prevent an electrostatic breakdown of the electromagnetic transducer element or the optical module.Type: GrantFiled: July 13, 2000Date of Patent: September 16, 2003Assignee: TDK CorporationInventors: Shinji Ichikawa, Yoshikazu Soeno, Takamitsu Tsuna
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Publication number: 20020191343Abstract: A method of maintaining a constant flying height of a magnetic head: adapted to maintain a flying height of a magnetic head on a magnetic disk substantially constant irrespective of a change of a skew angle, utilizing a device comprising a magnetic disk, a positioning device, a head supporting device and a magnetic head; said positioning device supporting one end of said head supporting device and rotating the head supporting device on a first plane placed on a second plane of said magnetic disk within a predetermined skew angle range; the head supporting device supporting said magnetic head at the other end thereof; the magnetic head being attached with reading/writing elements at an air discharge end of a slider having flying planes on a side of a third plane thereof opposing the magnetic disk; a thickness of said slider from each of the flying planes to an opposite surface on the reverse side thereof being 0.Type: ApplicationFiled: June 3, 2002Publication date: December 19, 2002Applicant: TDK CORPORATIONInventors: Mikio Matsuzaki, Kazumasa Fukuda, Takamitsu Tsuna
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Publication number: 20020190485Abstract: A structure for fitting a seal cap for communicating an interior of a sealed case with an exterior according to the present invention includes a seal cap which incorporates a seal portion having a breathable porous film fixed to its one end fitted to avent tube of the sealed case, and a vent tube mounting part of the sealed case provided with projections, wherein the structure is so constructed that when the seal cap is fitted to the vent tube, an end of the seal cap comes into contact with the projections thereby to position the seal cap.Type: ApplicationFiled: June 18, 2002Publication date: December 19, 2002Applicant: TDK CORPORATIONInventors: Masami Ohyama, Takamitsu Tsuna, Takahiro Tsuchiya
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Publication number: 20020135940Abstract: An object of the invention is to provide a write/read head supporting mechanism for a magnetic disk system or optical disk system having an actuator for effecting a micro-displacement of a slider, wherein any electrostatic breakdown of an electromagnetic transducer element or an optical module is prevented without detriment to the displacement capability of the actuator. The write/read head supporting mechanism of the invention comprises a slider 2 provided with an electromagnetic transducer element or an optical module, and a suspension 3. The slider 2 is supported on the suspension 3 by way of an actuator 4 for displacing the slider 2. A ground region that the suspension 3 has is electrically connected to the slider 2 by way of an electrical connecting member 8 movable and/or deformable in the displacement direction of the slider 2 by the actuator 4.Type: ApplicationFiled: May 24, 2002Publication date: September 26, 2002Applicant: TDK CORPORATIONInventors: Shinji Ichikawa, Yoshikazu Soeno, Takamitsu Tsuna
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Patent number: 6381104Abstract: The object of the invention is to provide a write/read head supporting mechanism for a magnetic or optical disk system having a micro-displacement actuator, by which any impediment to the displacement capability of the actuator is eliminated to achieve reliability improvements. The write/read head supporting mechanism comprises a slider, a suspension and an actuator as at least head constituents. The slider is provided with an electromagnetic transducer element or an optical module. The slider supported on the suspension by way of the actuator is displaceable relatively with respect to the suspension by the actuator. Between relatively displacing head constituents there is a space. Preferably, friction-reducing means should be provided in the space.Type: GrantFiled: November 12, 1999Date of Patent: April 30, 2002Assignee: TDK CorporationInventors: Yoshikazu Soeno, Shinji Ichikawa, Masashi Shiraishi, Takeshi Wada, Takamitsu Tsuna, Norikazu Ota, Takashi Honda, Mitsuyoshi Kawai
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Publication number: 20020008941Abstract: A method of maintaining a constant flying height of a magnetic head: adapted to maintain a flying height of a magnetic head on a magnetic disk substantially constant irrespective of a change of a skew angle, utilizing a device comprising a magnetic disk, a positioning device, a head supporting device and a magnetic head; said positioning device supporting one end of said head supporting device and rotating the head supporting device on a first plane placed on a second plane of said magnetic disk within a predetermined skew angle range; the head supporting device supporting said magnetic head at the other end thereof; the magnetic head being attached with reading/writing elements at an air discharge end of a slider having flying planes on a side of a third plane thereof opposing the magnetic disk; a thickness of said slider from each of the flying planes to an opposite surface on the reverse side thereof being 0.Type: ApplicationFiled: May 21, 2001Publication date: January 24, 2002Applicant: TDK CorporationInventors: Mikio Matsuzaki, Kazumasa Fukuda, Takamitsu Tsuna
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Patent number: 6246552Abstract: A read/write head includes a slider provided with an electromagnetic transducer element (or an optical module), an actuator, and a suspension. The actuator includes a fixed part, a movable part, and at least two beam members for coupling them together. The beam members have a displacement generating means that elongates and contracts by inverse piezoelectric effect or electrostrictive effect. The fixed part is fixed to the suspension, and the movable part is fixed to the slider. Upon the elongation and contraction of the displacement generator, the displacement generator deflects and the movable part displaces linearly, circularly or rotationally with respect to the fixed part, and the electromagnetic transducer element displaces in a linear or circular orbit, so that the electromagnetic transducer element intersects recording tracks.Type: GrantFiled: September 24, 1998Date of Patent: June 12, 2001Assignee: TDK CorporationInventors: Yoshikazu Soeno, Shinji Ichikawa, Takamitsu Tsuna, Isamu Sato
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Patent number: 5416656Abstract: A magnetic recording and reproducing apparatus having a magnetic disk, a magnetic head and a magnetic head supporting device. The surface roughness R.sub.max of the magnetic disk is at most 10 nm, and the magnetic head has a slider on which reading and writing elements are mounted. The slider is of a generally rectangular prism shape with the entire area of a medium opposing surface which opposes the magnetic disk being flat. The surface area of the medium opposing surface is 2 mm.sup.2 or less. The apparatus has a first relative speed at which the frictional coefficient between the magnetic disk and the magnetic head is changed from a high value to a low value when the speed increases, and a second relative speed at which the frictional coefficient is changed from a low value to a high value when the speed decreases.Type: GrantFiled: December 4, 1991Date of Patent: May 16, 1995Assignee: TDK CorporationInventors: Kazumasa Fukuda, Monjiro Momoi, Takamitsu Tsuna, Mikio Matsuzaki