Patents by Inventor Takeshi Tanamura

Takeshi Tanamura 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: 20160052233
    Abstract: In a composite lightweight fitting, at least one reinforced fiber layer (3a) of reinforced fiber layers (3) includes a reinforced fiber bundle (4) formed by aligning a large number of reinforced fibers into a belt-like shape, the reinforced fiber bundle (4) including a round portion (4a) arranged along a periphery of a through-hole (2). The round portion (4a) of the reinforced fiber bundle (4) is twisted.
    Type: Application
    Filed: February 19, 2014
    Publication date: February 25, 2016
    Inventors: Shun KAIGOME, Masayasu ISHIBASHI, Tetsuro HIROKAWA, Takeshi TANAMURA
  • Patent number: 8991641
    Abstract: A toroidal pressure vessel having extremely high pressure resistance has laminated latitudinal reinforcing fiber layers to improve a strength in a latitudinal direction of the pressure vessel. Moreover, putting reinforcing fibers constituting those laminated latitudinal reinforcing fiber layers in continuity enables further improvement of strength in the latitudinal direction of the pressure vessel, for example compared with a case where the reinforcing fibers are divided for each layer.
    Type: Grant
    Filed: April 15, 2011
    Date of Patent: March 31, 2015
    Assignees: Mitsubishi Heavy Industries, Ltd., Shikibo Ltd.
    Inventors: Tetsuya Ozawa, Nozomu Kawasetsu, Kentaro Shindo, Mitsuru Kondo, Akira Fukushima, Masayasu Ishibashi, Takeshi Tanamura, Kazuo Nakajima, Hiroshi Sakai, Tetsuro Hirokawa
  • Publication number: 20120024866
    Abstract: Provided is a toroidal pressure vessel having extremely high pressure resistance. Laminating latitudinal reinforcing fiber layers (32) enables to improve a strength in a latitudinal direction of a pressure vessel (1). Moreover, putting reinforcing fibers (32a) constituting those laminated latitudinal reinforcing fiber layers (32) in continuity enables to further improve the strength in the latitudinal direction of the pressure vessel (1), for example compared with a case where the reinforcing fibers are divided for each layer.
    Type: Application
    Filed: April 15, 2011
    Publication date: February 2, 2012
    Inventors: Tetsuya Ozawa, Nozomu Kawasetsu, Kentaro Shindo, Mitsuru Kondo, Akira Fukushima, Masayasu Ishibashi, Takeshi Tanamura, Kazuo Nakajima, Hiroshi Sakai, Tetsuro Hirokawa
  • Patent number: 7384585
    Abstract: A novel process for producing a dry preform for a composite material takes advantage of the fact that a reinforcing filament assembly, when consisting of a fiber reinforcement layer a, formed by stringing a first set of parallel strands of fiber reinforcement over a part or all of the plane within any desired shape along the straight axis 2, and a fiber reinforcement layer b, formed by stringing a second set of parallel strands of fiber reinforcement over the plane at an angle ? with respect to the straight axis 2, such that 0°<?<180°, the part of the reinforcing filament assembly that consists solely of the fiber reinforcement b can be deformed as desired. According to this process, strands c of fiber reinforcement are strung using a fiber reinforcement string jig as shown in FIGS. 8(A) and 8(B). The layers of the strung strands of fiber reinforcement are brought together by a simple means such as stitching.
    Type: Grant
    Filed: May 28, 2003
    Date of Patent: June 10, 2008
    Assignee: Shikibo Ltd.
    Inventors: Masayasu Ishibashi, Koichi Hashimoto, Hideki Sakonjo, Akira Iriguchi, Kazunori Morimoto, Takeshi Tanamura, Tetsuro Hirokawa
  • Patent number: 7138167
    Abstract: A preform for a fiber-reinforced composite material including a bent portion along a curved line for bending, a flange portion corresponding to an outer circumferential portion, and a semi-cylindrical portion formed by bending an inner circumferential portion along the curved line for bending located in a flat plane or a curved plane region. The preform is formed from a precursor having a predetermined extension. The outer circumferential portion corresponds to a first region where a first plurality of reinforced fibers is partially disposed in parallel along the curved line for bending. The inner circumferential portion corresponds to a second region constituted solely of a second plurality of reinforced fibers disposed throughout the entire area, so as to intersect the first plurality of reinforced fibers at a predetermined angle in the first region.
    Type: Grant
    Filed: August 12, 2002
    Date of Patent: November 21, 2006
    Assignee: Shikibo Ltd.
    Inventors: Hideki Sakonjo, Masayasu Ishibashi, Takeshi Tanamura, Koichi Hashimoto, Tetsuro Hirokawa
  • Patent number: 7114319
    Abstract: A unidirectional three dimensional fiber structure is provided which does not require weaving, displays a high level of interlayer strength and does not suffer from cracking, and which can also be easily produced with any arbitrary cross-section. A unidirectional three dimensional fiber structure is produced by inserting a plurality of long fibers which have been aligned unidirectionally into an inlet at one end of a cylindrical die with a plurality of needle holes in the peripheral walls thereof, and then performing needlepunch through the needle holes while drawing the plurality of long fibers out from an outlet at the opposite end of the cylindrical die.
    Type: Grant
    Filed: April 4, 2003
    Date of Patent: October 3, 2006
    Assignee: Shikibo Ltd.
    Inventors: Hideki Sakonjo, Masayasu Ishibashi, Tetsuro Hirokawa, Takeshi Tanamura, Koichi Hashimoto
  • Publication number: 20050042410
    Abstract: Technical Field of the Invention: A structural member required to have a prescribed strength in an aircraft, an automobile, a vessel or a constructed structure, etc., especially in a circular bore portion or a curved portion such as a wing or a body of an aircraft. Technical Problem: A preform for a fiber-reinforced composite material to be used as a structural member of a fiber-reinforced composite material having a curved portion is to be manufactured through a low-cost mass production.
    Type: Application
    Filed: August 12, 2002
    Publication date: February 24, 2005
    Inventors: Hideki Sakonjo, Masayasu Ishibashi, Takeshi Tanamura, Koichi Hashimoto, Tetsuro Hirokawa
  • Publication number: 20040247845
    Abstract: The present invention provides a fiber base material for constituting a composite material for increasing interlaminar strength (peeling strength, out-of-plane strength, post-impact strength), improving impregnation efficiency of a matrix in a composing process and preventing a resin-rich portion that affects the strength. A fiber base material for constituting a composite material comprising a single layer or a plurality of layers of a solid-shape base material constituted of a woven or knitted continuous fiber, wherein the base material is raised for enhancing interlaminar or bonding plane strength, improving permeability of a matrix at a surface and an interior portion thereof, and increasing plane smoothness.
    Type: Application
    Filed: August 2, 2004
    Publication date: December 9, 2004
    Inventors: Toshio Abe, Shigeru Nishimiya, Masahiro Shinya, Toshiyasu Fukuoka, Masayasu Ishibashi, Koichi Hashimoto, Takeshi Tanamura, Hideki Sakonjo, Tetsuro Hirokawa
  • Publication number: 20040134593
    Abstract: A novel process for producing a dry preform for a composite material takes advantage of the fact that a reinforcing filament assembly, when consisting of a fiber reinforcement layer a, formed by stringing a first set of parallel strands of fiber reinforcement over a part or all of the plane within any desired shape along the straight axis 2, and a fiber reinforcement layer b, formed by stringing a second set of parallel strands of fiber reinforcement over the plane at an angle &thgr; with respect to the straight axis 2, such that 0°<&thgr;<180°, the part of the reinforcing filament assembly that consists solely of the fiber reinforcement b can be deformed as desired. According to this process, strands c of fiber reinforcement are strung using a fiber reinforcement string jig as shown in FIGS. 8(A) and 8(B). The layers of the strung strands of fiber reinforcement are brought together by a simple means such as stitching.
    Type: Application
    Filed: May 28, 2003
    Publication date: July 15, 2004
    Inventors: Masayasu Ishibashi, Koichi Hashimoto, Hideki Sakonjo, Akira Iriguchi, Kazunori Morimoto, Takeshi Tanamura, Tetsuro Hirokawa
  • Publication number: 20030194528
    Abstract: A unidirectional three dimensional fiber structure is provided which does not require weaving, displays a high level of interlayer strength and does not suffer from cracking, and which can also be easily produced with any arbitrary cross-section. A unidirectional three dimensional fiber structure is produced by inserting a plurality of long fibers which have been aligned unidirectionally into an inlet at one end of a cylindrical die with a plurality of needle holes in the peripheral walls thereof, and then performing needlepunch through the needle holes while drawing the plurality of long fibers out from an outlet at the opposite end of the cylindrical die.
    Type: Application
    Filed: April 4, 2003
    Publication date: October 16, 2003
    Inventors: Hideki Sakonjo, Masayasu Ishibashi, Tetsuro Hirokawa, Takeshi Tanamura, Koichi Hashimoto
  • Patent number: 6245283
    Abstract: A fiber-bond type ceramic material 4 is produced by using as raw material fibers 1 inorganic fibers of Si—M—C—O synthesized by melt spinning polycarbosilane, then infusibilizing the produced threads, and firing the set threads, forming from the raw material fibers a woven fabric 2 having all the fibers thereof extended perpendicularly or obliquely relative to the direction of compression during the course of a hot-press fabrication at a weaving step 12, heat-treating the woven fabric in the air, thereby preparing a woven fabric of oxidized fibers 3 provided with an oxide layer on the surface thereof at an oxidizing step 14, and subjecting the woven fabric of oxidized fibers to a hot-press fabrication while compressing the fabric in the direction of the compression thereby causing the oxide layers on the surface to adhere fast to each other and form a matrix at a hot-press step 16.
    Type: Grant
    Filed: September 24, 1998
    Date of Patent: June 12, 2001
    Assignees: Ishikawajima-Harima Heavy Industries, Ube Industries, Ltd., Shikibo, Ltd.
    Inventors: Shouju Masaki, Takemi Yamamura, Tetsurou Hirokawa, Takeshi Tanamura