Patents by Inventor Akira Hamajima
Akira Hamajima 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: 10903708Abstract: A stator of a brushless motor may include a core; a bobbin including a pair of side surfaces, an inner wall, and an outer wall; a conductor wire wound by being overlapped in plural layers; and a resin layer covering the bobbin and the conductor wire. A profile of the conductor wire may become larger towards an outer circumferential side of the stator. Among portions of the conductor wire arranged along a rotary axis direction of a rotor on at least one side surface included in the pair of side surfaces and located on an innermost circumferential side of the stator in the respective plural layers, a portion of the conductor wire exposed to the resin layer and separated from the inner wall and the outer wall may be tilted from an inner circumferential side of the stator toward the outer circumferential side of the stator.Type: GrantFiled: July 3, 2018Date of Patent: January 26, 2021Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Yoshihiko Honda, Akira Hamajima, Ryohei Otaka
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Patent number: 10859747Abstract: A phosphor element comprises: a support substrate; an optical waveguide for propagating an excitation light through the waveguide, the optical waveguide comprising a phosphor generating a fluorescence, and the optical waveguide comprising an emission side end surface emitting the excitation light and the fluorescence, an opposing end surface opposing the emission side end surface, a bottom surface, a top surface opposing the bottom surface and a pair of side surfaces; a bottom surface side clad layer covering the bottom surface of the optical waveguide; a top surface side clad layer covering the top surface of the optical waveguide; side surface side clad layers covering the side surfaces of the optical waveguide, respectively; a top surface side reflection film covering the top surface side clad layer; side surface side reflection films covering the side surface side clad layers, respectively; and a bottom surface side reflection film provided between the support substrate and the bottom surface side clad laType: GrantFiled: June 13, 2019Date of Patent: December 8, 2020Assignee: NGK Insulators, Ltd.Inventors: Jungo Kondo, Naotake Okada, Shoichiro Yamaguchi, Keiichiro Asai, Shuhei Higashihara, Yuichi Iwata, Tetsuya Ejiri, Akira Hamajima
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Publication number: 20190368450Abstract: A fuel supply device may include a pump unit disposed in the fuel tank and including a fuel pump configured to eject the fuel in the fuel tank; a set plate fixed at an opening of the fuel tank; a controller fixed on the set plate outside the fuel tank and configured to control electric power supplied to the fuel pump; a connecting member extending from the set plate toward the pump unit within the fuel tank and connecting the set plate and the pump unit; and a conductive member having an electric component fixed thereon, extending from the controller along the connecting member within the fuel tank, and fixed to the connecting member.Type: ApplicationFiled: December 7, 2017Publication date: December 5, 2019Inventors: Yoshihiko HONDA, Akira HAMAJIMA, Kazuki TAGA
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Publication number: 20190310408Abstract: A phosphor element comprises: a support substrate; an optical waveguide for propagating an excitation light through the waveguide, the optical waveguide comprising a phosphor generating a fluorescence, and the optical waveguide comprising an emission side end surface emitting the excitation light and the fluorescence, an opposing end surface opposing the emission side end surface, a bottom surface, a top surface opposing the bottom surface and a pair of side surfaces; a bottom surface side clad layer covering the bottom surface of the optical waveguide; a top surface side clad layer covering the top surface of the optical waveguide; side surface side clad layers covering the side surfaces of the optical waveguide, respectively; a top surface side reflection film covering the top surface side clad layer; side surface side reflection films covering the side surface side clad layers, respectively; and a bottom surface side reflection film provided between the support substrate and the bottom surface side clad laType: ApplicationFiled: June 13, 2019Publication date: October 10, 2019Applicant: NGK INSULATORS, LTD.Inventors: Jungo KONDO, Naotake OKADA, Shoichiro YAMAGUCHI, Keiichiro ASAI, Shuhei HIGASHIHARA, Yuichi Iwata, Tetsuya Ejiri, Akira Hamajima
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Patent number: 10253736Abstract: A fuel pump may be driven by a brushless motor. The fuel pump may include a core; three supplying terminals configured to supply electric power to a coil wire fixed to the core and wound around the core; a resin layer holding the three supplying terminals; and a ground terminal held by the resin layer in a state of being insulated from the three supplying terminals, wherein the ground terminal may be electrically connected to a control circuit configured to control electric power supplied to the three supplying terminals.Type: GrantFiled: November 14, 2014Date of Patent: April 9, 2019Assignee: Aisan Kogyo Kabushiki KaishaInventors: Yoshihiko Honda, Akira Hamajima, Yoshiki Kamio
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Patent number: 10230349Abstract: An acoustic wave device is an end surface reflection-type acoustic wave device and includes a substantially rectangular-parallelepiped composite substrate in which a piezoelectric substrate and a supporting substrate are joined together, with a pair of IDT electrodes provided on the substrate in such a manner as to be intercalated with each other. A chipping size in a first side face of the substrate is 1/10 of a wavelength ? of an acoustic wave or smaller, the face extending orthogonally to a direction of acoustic-wave propagation. A chipping size in a second side face of the substrate is larger than the chipping size in the face and is, for example, ½ of the wavelength ? or larger and 50 times the wavelength ? or smaller, the face extending in the direction of acoustic-wave propagation.Type: GrantFiled: December 22, 2015Date of Patent: March 12, 2019Assignee: NGK INSULATORS, LTD.Inventors: Tomoyoshi Tai, Akira Hamajima, Yuji Hori
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Publication number: 20190027992Abstract: A stator of a brushless motor may include a core; a bobbin including a pair of side surfaces, an inner wall, and an outer wall; a conductor wire wound by being overlapped in plural layers; and a resin layer covering the bobbin and the conductor wire. A profile of the conductor wire may become larger towards an outer circumferential side of the stator. Among portions of the conductor wire arranged along a rotary axis direction of a rotor on at least one side surface included in the pair of side surfaces and located on an innermost circumferential side of the stator in the respective plural layers, a portion of the conductor wire exposed to the resin layer and separated from the inner wall and the outer wall may be tilted from an inner circumferential side of the stator toward the outer circumferential side of the stator.Type: ApplicationFiled: July 3, 2018Publication date: January 24, 2019Inventors: Yoshihiko Honda, Akira Hamajima, Ryohei Otaka
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Patent number: 10164493Abstract: Each of the coils provided in a stator includes a wire introducing portion where a wire is introduced into a groove, an adjusting portion including the wire wound within the groove, and a plurality of wire layers each of which are aligned adjacent one another along an extending direction of a tooth. Among the plurality of wire layers, wires located on a periphery side-end in the odd-numbered wire layers are separated from an inner circumferential surface of the periphery by a half pitch.Type: GrantFiled: November 28, 2014Date of Patent: December 25, 2018Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Yoshihiko Honda, Akira Hamajima, Takashi Suefuji
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Patent number: 10153677Abstract: A stator may include a stator yoke including one or more yoke portions extending along a circumferential direction of the stator yoke; and a cover configured of resin. The stator yoke may include: a contact part at which an end surface of one yoke portion among the one or more yoke portions in the circumferential direction contacts the other end surface of the one yoke portion in the circumferential direction; a first groove extending along an axial direction of the stator yoke in a vicinity of the contact part; and a second groove extending along the axial direction and disposed at a position spaced father away from the contact part than the first groove. The cover may include a filling that fills the first groove, and the second groove may be hollow.Type: GrantFiled: January 18, 2016Date of Patent: December 11, 2018Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Yoshihiko Honda, Akira Hamajima
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Patent number: 9742232Abstract: A stator may comprise: a core having a tubular shape and comprising a tooth extending toward a central axis of the tubular shape; a conducting wire engaging part projecting from an axial end of the core in an axially outward direction from the core; and a coil disposed on the tooth by winding a conducting wire on the tooth. An end of the conducting wire may be bent at a bending portion. The conducting wire may engage with the conducting wire engaging part at the bending portion. A diameter of the conducting wire at the bending portion may be smaller than a diameter of the conducting wire at another portion of the conducting wire.Type: GrantFiled: August 17, 2015Date of Patent: August 22, 2017Assignee: Aisan Kogyo Kabushiki KaishaInventors: Yoshihiko Honda, Akira Hamajima
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Patent number: 9680083Abstract: A composite substrate 10 includes a piezoelectric substrate 12 and a support layer 14 bonded to the piezoelectric substrate 12. The support layer 14 is made of a material having no crystalline anisotropy in a bonded surface thereof and has a smaller thickness than the piezoelectric substrate 12. The piezoelectric substrate 12 and the support layer 14 are bonded together with an adhesive layer 16 therebetween. The composite substrate 10 has a total thickness of 180 ?m or less. The base thickness ratio Tr=t2/(t1+t2) is 0.1 to 0.4, where t1 is the thickness of the piezoelectric substrate 12, and t2 is the thickness of the support layer 14. The thickness t1 is 100 ?m or less. The thickness t2 is 50 ?m or less.Type: GrantFiled: December 10, 2014Date of Patent: June 13, 2017Assignee: NGK INSULATORS, LTD.Inventors: Yuji Hori, Tomoyoshi Tai, Akira Hamajima, Toshinao Nakahara
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Publication number: 20170141634Abstract: Each of the coils provided in a stator includes a wire introducing portion where a wire is introduced into a groove, an adjusting portion including the wire wound within the groove, and a plurality of wire layers each of which are aligned adjacent one another along an extending direction of a tooth. Among the plurality of wire layers, wires located on a periphery side-end in the odd-numbered wire layers are separated from an inner circumferential surface of the periphery by a half pitch.Type: ApplicationFiled: November 28, 2014Publication date: May 18, 2017Inventors: Yoshihiko HONDA, Akira HAMAJIMA, Takashi SUEFUJI
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Patent number: 9502937Abstract: The first extending portion 26 overlaps the second extending portion 27 in a radial direction at one part in the circumferential direction and overlaps the third extending portion 28 in the radial direction at another part in the circumferential direction. The second extending portion 27 overlaps the first extending portion 26 in the radial direction at one part in the circumferential direction and overlaps the third extending portion 28 in the radial direction at another part in the circumferential direction. The third extending portion 28 overlaps the first extending portion 26 in the radial direction at one part in the circumferential direction and overlaps the second extending portion 27 in the radial direction at another part in the circumferential direction.Type: GrantFiled: August 29, 2014Date of Patent: November 22, 2016Assignee: AISAN KOGYO KABUSHIKI KAISHAInventors: Akira Hamajima, Yoshihiko Honda, Yoichi Kawakita
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Publication number: 20160333833Abstract: A fuel pump may be driven by a brushless motor. The fuel pump may include a core; three supplying terminals configured to supply electric power to a coil wire fixed to the core and wound around the core; a resin layer holding the three supplying terminals; and a ground terminal held by the resin layer in a state of being insulated from the three supplying terminals, wherein the ground terminal may be electrically connected to a control circuit configured to control electric power supplied to the three supplying terminals.Type: ApplicationFiled: November 14, 2014Publication date: November 17, 2016Inventors: Yoshihiko HONDA, Akira HAMAJIMA, Yoshiki KAMIO
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Publication number: 20160211717Abstract: A stator may include a stator yoke including one or more yoke portions extending along a circumferential direction of the stator yoke; and a cover configured of resin. The stator yoke may include: a contact part at which an end surface of one yoke portion among the one or more yoke portions in the circumferential direction contacts the other end surface of the one yoke portion in the circumferential direction; a first groove extending along an axial direction of the stator yoke in a vicinity of the contact part; and a second groove extending along the axial direction and disposed at a position spaced father away from the contact part than the first groove. The cover may include a filling that fills the first groove, and the second groove may be hollow.Type: ApplicationFiled: January 18, 2016Publication date: July 21, 2016Inventors: Yoshihiko Honda, Akira Hamajima
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Publication number: 20160112029Abstract: An acoustic wave device 10 is an end surface reflection-type acoustic wave device and includes a substantially rectangular-parallelepiped composite substrate 15 in which a piezoelectric substrate 12 and a supporting substrate 14 are joined together, with a pair of IDT electrodes 16 and 18 provided on the substrate 12 in such a manner as to be intercalated with each other. A chipping size in a first side face 12a of the substrate 12 is 1/10 of a wavelength ? of an acoustic wave or smaller, the face 12a extending orthogonally to a direction of acoustic-wave propagation. A chipping size in a second side face 12b of the substrate 12 is larger than the chipping size in the face 12a and is, for example, 1/2 of the wavelength ? or larger and 50 times the wavelength ? or smaller, the face 12b extending in the direction of acoustic-wave propagation.Type: ApplicationFiled: December 22, 2015Publication date: April 21, 2016Applicant: NGK INSULATORS, LTD.Inventors: Tomoyoshi Tai, Akira Hamajima, Yuji Hori
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Publication number: 20160049840Abstract: A stator may comprise: a core having a tubular shape and comprising a tooth extending toward a central axis of the tubular shape; a conducting wire engaging part projecting from an axial end of the core in an axially outward direction from the core; and a coil disposed on the tooth by winding a conducting wire on the tooth. An end of the conducting wire may be bent at a bending portion. The conducting wire may engage with the conducting wire engaging part at the bending portion. A diameter of the conducting wire at the bending portion may be smaller than a diameter of the conducting wire at another portion of the conducting wire.Type: ApplicationFiled: August 17, 2015Publication date: February 18, 2016Inventors: Yoshihiko Honda, Akira Hamajima
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Publication number: 20150091416Abstract: A composite substrate 10 includes a piezoelectric substrate 12 and a support layer 14 bonded to the piezoelectric substrate 12. The support layer 14 is made of a material having no crystalline anisotropy in a bonded surface thereof and has a smaller thickness than the piezoelectric substrate 12. The piezoelectric substrate 12 and the support layer 14 are bonded together with an adhesive layer 16 therebetween. The composite substrate 10 has a total thickness of 180 ?m or less. The base thickness ratio Tr=t2/(t1+t2) is 0.1 to 0.4, where t1 is the thickness of the piezoelectric substrate 12, and t2 is the thickness of the support layer 14. The thickness t1 is 100 ?m or less. The thickness t2 is 50 ?m or less.Type: ApplicationFiled: December 10, 2014Publication date: April 2, 2015Applicant: NGK INSULATORS, LTD.Inventors: Yuji Hori, Tomoyoshi Tai, Akira Hamajima, Toshinao Nakahara
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Publication number: 20150076943Abstract: The first extending portion 26 overlaps the second extending portion 27 in a radial direction at one part in the circumferential direction and overlaps the third extending portion 28 in the radial direction at another part in the circumferential direction. The second extending portion 27 overlaps the first extending portion 26 in the radial direction at one part in the circumferential direction and overlaps the third extending portion 28 in the radial direction at another part in the circumferential direction. The third extending portion 28 overlaps the first extending portion 26 in the radial direction at one part in the circumferential direction and overlaps the second extending portion 27 in the radial direction at another part in the circumferential direction.Type: ApplicationFiled: August 29, 2014Publication date: March 19, 2015Applicant: AISAN KOGYO KABUSHIKI KAISHAInventors: Akira Hamajima, Yoshihiko Honda, Yoichi Kawakita
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Patent number: 8002998Abstract: A first main face of a substrate of a dielectric single crystal is etched to form recesses in the substrate. A second main face of the substrate is mechanically processed to form a slab, so that the recesses pass through the substrate to form through holes.Type: GrantFiled: August 21, 2007Date of Patent: August 23, 2011Assignee: NGK Insulators, Ltd.Inventors: Yuichi Iwata, Osamu Mitomi, Jungo Kondo, Kenji Aoki, Takashi Yoshino, Akira Hamajima