Patents by Inventor Kunio Hiyama

Kunio Hiyama 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).

  • Publication number: 20190311702
    Abstract: Provision of a piezoelectric element which uses a lightweight and flexible electret material and an electrode layer which is also lightweight, has high conductivity and good flexibility to easily receive electrical signals from an electret, and has good durability. Additionally, provision of a musical instrument provided with such a piezoelectric element. A piezoelectric element comprising an electrode layer (B) on at least one surface of an electret material (A) having pores inside, wherein a porosity of the electret material (A) is 20 to 80%, the electrode layer (B) contains 20 to 70 mass % of a carbon fine particle, and a thickness of the electrode layer (B) is 2 to 100 ?m.
    Type: Application
    Filed: November 29, 2017
    Publication date: October 10, 2019
    Applicants: YUPO CORPORATION, YAMAHA CORPORATION
    Inventors: Hiroshi KOIKE, Yutaro SUGAMATA, Seiichiro IIDA, Kunio HIYAMA, Suguru SASAKI, Hidekazu KODAMA
  • Publication number: 20180209838
    Abstract: A sensor unit capable of protecting a piezoelectric element and detecting vibration and sound is provided. The sensor unit comprises a sheet-like piezoelectric element having a porous layer, and a sound propagation sheet covering at least one face of the piezoelectric element and permitting transmission of sound from a first face toward a second face of the sound propagation sheet. A difference in acoustic pressure level between the sound incident on the sound propagation sheet and the transmitted sound is preferably no greater than 10 dB. A surface density of the sound propagation sheet is preferably from 0.03 g/m2 to 100 g/m2. The sound propagation sheet is preferably flexible and preferably has voids. The sensor unit preferably further comprises a sound insulation sheet covering another face of the piezoelectric element and substantially preventing transmission of sound from a second face toward a first face of the sound insulation sheet.
    Type: Application
    Filed: February 28, 2018
    Publication date: July 26, 2018
    Inventors: Tomoya MIYATA, Kunio HIYAMA, Seiichiro IIDA, Hiroshi KOIKE, Hidekazu KODAMA
  • Patent number: 8011472
    Abstract: A sound absorbing structure is constituted of a housing having a hollow portion and an opening and a vibration member composed of a board or diaphragm. The vibration member is a square-shaped material having elasticity composed of a synthetic resin and is bonded to the opening of the housing, thus forming an air layer closed inside the sound absorbing structure by the housing and the vibration member. In the sound absorbing structure, when the lateral/longitudinal dimensions of the air layer and characteristics of the vibration member (e.g. a Young's modulus, thickness, and Poisson's ratio) are set such that the fundamental frequency of a vibration occurring in a bending system falls within 5% and 65% of the resonance frequency of a spring-mass system, a vibration mode having a large amplitude occurs in a frequency band lower than the resonance frequency of the spring-mass system, this improving the sound absorption coefficient.
    Type: Grant
    Filed: January 28, 2009
    Date of Patent: September 6, 2011
    Assignee: Yamaha Corporation
    Inventors: Rento Tanase, Yasutaka Nakamura, Atsushi Yoshida, Masaru Matsushita, Kunio Hiyama
  • Publication number: 20090223738
    Abstract: A sound absorbing structure is constituted of a housing and a vibration member. The vibration member composed of a synthetic resin having elasticity is constituted of a first member and a second member whose surface density is smaller than the surface density of the first member, wherein the first member is fixed into a center hole of the second member so as to form a single board of the vibration member. Since the surface density of the center portion of the vibration member is higher than the surface density of the peripheral portion of the vibration member, the frequency of absorbed sound further decreases in comparison with the foregoing structure in which the vibration member is increased in weight to change the frequency of absorbed sound. This makes it possible to arbitrarily change the frequency of absorbed sound without substantially changing the overall weight of the sound absorbing structure.
    Type: Application
    Filed: February 18, 2009
    Publication date: September 10, 2009
    Applicant: Yamaha Corporation
    Inventors: Yasutaka Nakamura, Rento Tanase, Kunio Hiyama, Atsushi Yoshida, Masaru Matsushita
  • Publication number: 20090205901
    Abstract: A sound absorbing structure is constituted of a housing having a hollow portion and an opening and a vibration member composed of a board or diaphragm. The vibration member is a square-shaped material having elasticity composed of a synthetic resin and is bonded to the opening of the housing, thus forming an air layer closed inside the sound absorbing structure by the housing and the vibration member. In the sound absorbing structure, when the lateral/longitudinal dimensions of the air layer and characteristics of the vibration member (e.g. a Young's modulus, thickness, and Poisson's ratio) are set such that the fundamental frequency of a vibration occurring in a bending system falls within 5% and 65% of the resonance frequency of a spring-mass system, a vibration mode having a large amplitude occurs in a frequency band lower than the resonance frequency of the spring-mass system, this improving the sound absorption coefficient.
    Type: Application
    Filed: January 28, 2009
    Publication date: August 20, 2009
    Applicant: YAMAHA CORPORATION
    Inventors: Rento Tanase, Yasutaka Nakamura, Atsushi Yoshida, Masaru Matsushita, Kunio Hiyama
  • Patent number: 7559139
    Abstract: A method for manufacturing a probe unit includes: (a) preparing a substrate; (b) forming a hollow part in the substrate; (c) forming a sacrificial layer that buries the hollow part on the substrate; (d) forming a first layer on the substrate, wherein one end of the first layer is positioned on the sacrificial layer; (e) forming a second layer on the first layer at least excepting the one end; and (f) removing the sacrificial layer.
    Type: Grant
    Filed: January 8, 2008
    Date of Patent: July 14, 2009
    Assignee: Yamaha Corporation
    Inventors: Masahiro Sugiura, Kunio Hiyama, Susumu Ogino
  • Patent number: 7416773
    Abstract: In order to provide a sound-absorbing body which has both a thin thickness and improved sound-absorption characteristics with regard to a low tone range sounds, the sound-absorbing body (1) includes: an organic hybrid sheet (2) constituted from an organic low-molecular material which is spread in a matrix polymer; and a gastight air cell (3) which is closely provided at a backside (2a) of the organic hybrid sheet, wherein the organic hybrid sheet indicates both a sound-absorption peak of a random incidence sound-absorption coefficient at a frequency band of 400 Hz or lower and another sound-absorption peak when the organic hybrid sheet is vibrated by applying air vibration caused by sound, because of adhering the organic hybrid sheet to the gastight air cell.
    Type: Grant
    Filed: October 17, 2007
    Date of Patent: August 26, 2008
    Assignee: Yamaha Corporation
    Inventors: Kunio Hiyama, Masuhiro Okada, Emiko Suzuki, legal representative, Yasutaka Nakamura, Hideo Suzuki
  • Publication number: 20080115354
    Abstract: A probe unit comprises a substrate and a lead formed on the substrate and having a tip part projecting from an edge of the substrate and contacting to an electrode of a sample, and a thick part of which thickness is thicker than the tip part. The probe unit can make continuity with a sample firmly with a proper contact pressure while lowering electrical resistance of leads.
    Type: Application
    Filed: January 8, 2008
    Publication date: May 22, 2008
    Applicant: YAMAHA CORPORATION
    Inventors: Masahiro Sugiura, Kunio Hiyama, Susumu Ogino
  • Publication number: 20080093164
    Abstract: In order to provide a sound-absorbing body which has both a thin thickness and improved sound-absorption characteristics with regard to a low tone range sounds, the sound-absorbing body (1) includes: an organic hybrid sheet (2) constituted from an organic low-molecular material which is spread in a matrix polymer; and a gastight air cell (3) which is closely provided at a backside (2a) of the organic hybrid sheet, wherein the organic hybrid sheet indicates both a sound-absorption peak of a random incidence sound-absorption coefficient at a frequency band of 400 Hz or lower and another sound-absorption peak when the organic hybrid sheet is vibrated by applying air vibration caused by sound, because of adhering the organic hybrid sheet to the gastight air cell.
    Type: Application
    Filed: October 17, 2007
    Publication date: April 24, 2008
    Inventors: Kunio Hiyama, Masuhiro Okada, Hideo Suzuki, Emiko Suzuki, Yasutaka Nakamura
  • Publication number: 20080073145
    Abstract: In the silencer of the present invention, a cylindrical porous plate is provided on the outer circumferential side of a path forming component that forms a sound absorption path. The porous plate has a plurality of micro holes penetrating it in the thickness direction. By forming the plurality of micro holes on the outer circumferential side of the porous plate, sound generated by the air flowing along the sound absorption path is attenuated without any sound absorption material being used. The porous plate is formed from metal. As a result, there is no source for generating for dust and dirt such as sound absorption materials formed, for example, from connected foam resin and fiber. Accordingly, it is possible to reduce sound that is generated by the flow of air while also reducing the creation of dust and dirt.
    Type: Application
    Filed: September 18, 2007
    Publication date: March 27, 2008
    Applicant: YAMAHA CORPORATION
    Inventors: Yasutaka Nakamura, Kunio Hiyama
  • Publication number: 20080063512
    Abstract: An air supplying apparatus may include, but is not limited to, a pump, a motor, a housing, and an intake unit. The motor drives the pump. The housing provides a chamber that contains the pump and the motor. The intake unit supplies an air to the chamber. The intake unit may include, but is not limited to, first and second portions. The first portion communicates with the atmosphere outside the apparatus. The second portion is coupled to the housing. The second portion communicates with the chamber. The second portion is configured to blow the air to the motor.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 13, 2008
    Applicant: Yamaha Corporation
    Inventors: Yasutaka Nakamura, Kunio Hiyama
  • Publication number: 20050285609
    Abstract: A probe unit comprises a substrate and a lead formed on the substrate and having a tip part projecting from an edge of the substrate and contacting to an electrode of a sample, and a thick part of which thickness is thicker than the tip part. The probe unit can make continuity with a sample firmly with a proper contact pressure while lowering electrical resistance of leads.
    Type: Application
    Filed: June 29, 2005
    Publication date: December 29, 2005
    Inventors: Masahiro Sugiura, Kunio Hiyama, Susumu Ogino
  • Patent number: 6114000
    Abstract: A ribbon-shaped material for FRTP molded objects 1 having a laminate 4 in which a ribbon-shaped reinforcing fiber tow 2 is placed between thermoplastic resin films for supplying matrix resin which are wider than the ribbon-shaped reinforcing fiber tow 2, and in which the thermoplastic resin films 3,3 are fused in side portions 5,5 of the laminate 4, which are along the longitudinal direction of the laminate 4; and a wide material for FRTP molded objects 30,40 obtained by arranging a plurality of the ribbon-shaped materials for FRTP molded objects 1 whereby adjacent ribbon-shaped materials for FRTP molded objects 1,1 overlap each other in a manner such that the side portion 5 of one of the adjacent ribbon-shaped materials for FRTP molded objects 1 is placed on the side portion 5 or the middle portion 6 of the other along the longitudinal direction, and fusing together each overlapping portion 31,41 of the ribbon-shaped materials for FRTP molded objects 1, whereby the reinforcing fiber tows 2 are arranged in pa
    Type: Grant
    Filed: July 2, 1998
    Date of Patent: September 5, 2000
    Assignee: Yamaha Corporation
    Inventors: Kunimasa Muroi, Toshiharu Fukushima, Kunio Hiyama
  • Patent number: 5639552
    Abstract: A pre-impregnation has a ribbon-shaped tow of reinforcing fibers and a ribbon of thermoplastic resin laminated on the ribbon-shaped tow and fixed thereto at intervals, and the thermoplastic resin is allowed to uniformly impregnate into the ribbon-shaped tow under heat application so that a void does not take place in the ribbon-shaped tow.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: June 17, 1997
    Assignee: Yamaha Corporation
    Inventors: Toshiharu Fukushima, Kunimasa Muroi, Kunio Hiyama
  • Patent number: 5633074
    Abstract: A prepreg for a sleeve member of fiber reinforced thermoplastic resin available for a tennis racket or a golf club is woven by using ribbon-shaped reinforcing fiber tows/uni-directional commingle yarns and matrix fiber tows, and the ribbon-shaped reinforcing fiber tows/commingle yarns make the prepreg and, accordingly, the sleeve product thin, light, highly dense, economical and large in mechanical strength.
    Type: Grant
    Filed: June 3, 1994
    Date of Patent: May 27, 1997
    Assignee: Yamaha Corporation
    Inventors: Kunimasa Muroi, Toshiharu Fukushima, Kunio Hiyama
  • Patent number: 5618598
    Abstract: A pre-impregnation has a ribbon-shaped tow of reinforcing fibers and a ribbon of thermoplastic resin laminated on the ribbon-shaped tow and fixed thereto at intervals, and the thermoplastic resin is allowed to uniformly impregnate into the ribbon-shaped tow under heat application so that a void does not take place in the ribbon-shaped tow.
    Type: Grant
    Filed: February 29, 1996
    Date of Patent: April 8, 1997
    Assignee: Yamaha Corporation
    Inventors: Toshiharu Fukushima, Kunimasa Muroi, Kunio Hiyama
  • Patent number: 5520995
    Abstract: A pre-impregnation has a ribbon-shaped tow of reinforcing fibers and a ribbon of thermoplastic resin laminated on the ribbon-shaped tow and fixed thereto at intervals, and the thermoplastic resin is allowed to uniformly impregnate into the ribbon-shaped tow under heat application so that a void does not take place in the ribbon-shaped tow.
    Type: Grant
    Filed: May 11, 1994
    Date of Patent: May 28, 1996
    Assignee: Yamaha Corporation
    Inventors: Toshiharu Fukushima, Kunimasa Muroi, Kunio Hiyama
  • Patent number: 5262118
    Abstract: In the production of a hollow FRP article such as a wood type carbon black golf club head, a hollow resin shell is formed via blow molding, heat-resistant fine particles are filled as a filler into the interior of the resin shell, the interior of the resin shell is decompressed to form an inner mold, the inner mold is covered with FRP prepreg including thermoplastic resin to form a prepreg composite, the prepreg composite is heated in a metallic mold under pressure and the fine articles are removed after demolding. A golf club shaft is formed by heating a mandrel, applying thermoplastic resin powder to the mandrel and then winding a lamellar prepreg around the mandrel to thereby form a hollow shaft. A golf club is formed from a head and shaft formed as described above by enlarging the end of the shaft, placing the shaft and the head in a mold and heating the mold under pressure.
    Type: Grant
    Filed: March 20, 1992
    Date of Patent: November 16, 1993
    Assignee: Yamaha Corporation
    Inventors: Toshihari Fukushima, Masuhiro Okada, Kaoru Hashimoto, Eizi Abe, Kunio Hiyama
  • Patent number: 5247518
    Abstract: A high-speed ring LAN capable of accommodating at least one public network having a signal transmission rate of 155.57 MHz, and at least one sub-LAN having a signal transmission rate of 100 MHz. The high-speed LAN has a signal transmission rate of 155.52 Mbps .times.n (n is an even number). SONET (Synchronous Optical NETwork) subframes each comprising a 9 bytes .times.9 section overhead area and a 261 bytes .times.9 virtual container 4 (VC-4) area flow in a time-divisional n-multiplexed format. The respective node devices inserted in the transmission path have one or more ports to accommodate sub-LANs or public networks. Information is exchanged in units of a fixed-length packet between a received SONET subframe and an asynchronous port whereas information is exchanged in units of a byte between the SONET subframe and a synchronous port.
    Type: Grant
    Filed: January 13, 1992
    Date of Patent: September 21, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Yoshihiro Takiyasu, Toshiki Tanaka, Taihei Suzuki, Eiichi Amada, Yukiji Yamauchi, Mitsuhiro Yamaga, Matsuaki Terada, Kunio Hiyama
  • Patent number: 5241543
    Abstract: In a local area network composed of transmission lines for interconnecting a plurality of subordinate networks including synchronous apparatuses and a plurality of nodes which connect the subordinate networks to the transmission lines, information is transferred using a fixed length frame, a clock source which generates an independent clock signal and a circuit which generates a fixed length frame with the oscillation frequency of the clock source as a reference are provided in each node so as to adopt an independent clocking system, and distribution of a common synchronizing clock required for synchronous apparatuses is made by transmission while embedding transition point information of a synchronizing clock in a specific space in the fixed length frame.
    Type: Grant
    Filed: March 20, 1991
    Date of Patent: August 31, 1993
    Assignee: Hitachi, Ltd.
    Inventors: Eiichi Amada, Kunio Hiyama, Naoya Kobayashi, Yoshihiro Takiyasu, Yasuhiko Hatekeyama, Haruyuki Nakayama