Patents by Inventor Tsutomu Matsunaga
Tsutomu Matsunaga 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: 11002342Abstract: A cam shaft drive device includes a chain, a guide lever, a chain chamber, which is provided in a cylinder head, a support bolt, which pivotably supports the guide lever, the support bolt including a head portion, a male screw portion, and a shaft portion, which is inserted through the support hole of the guide lever, an insertion hole, which is through which the support bolt is inserted, and a female screw hole, which is provided in the rear wall and into which the male screw portion is screwed, wherein a length from a rear end to a front end of the shaft portion is longer than an axial distance from a front end of the support hole to a front end of the insertion hole in a state where the guide lever abuts on the rear wall.Type: GrantFiled: November 11, 2016Date of Patent: May 11, 2021Assignee: ISUZU MOTORS LIMITEDInventors: Tsutomu Matsunaga, Naoki Mizukami, Kazuhiro Hirose
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Patent number: 10760668Abstract: A transmission assembly structure includes an engine-side joining surface, a transmission-side joining surface, which is joined to the engine-side joining surface, an engine component which is provided on an outside of the engine-side joining surface in a radial direction in the flywheel housing and protrudes toward the transmission side, a guide member which is provided on the engine-side joining surface or in the vicinity of the engine-side joining surface of the flywheel housing and in a vicinity of the engine component and which protrudes toward the transmission side further than the engine component, and a guide hole, which is provided on the transmission-side joining surface of the transmission housing or in the vicinity of the transmission-side joining surface and into which the guide member is inserted.Type: GrantFiled: November 11, 2016Date of Patent: September 1, 2020Assignee: ISUZU MOTORS LIMITEDInventors: Tsutomu Matsunaga, Naoki Mizukami, Daisuke Sueoka, Isao Kitsukawa
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Patent number: 10415441Abstract: Provided is a grounding structure for an internal combustion engine, including a resinous body 2 configured to be fastened to an engine body 7 via a bolt 8, an electric component 5 attached to the body 2, and a conductive member 16 provided to electrically connect the electric component 5 to the bolt 8 in order to ground the electric component 5 to the engine body 7.Type: GrantFiled: November 9, 2016Date of Patent: September 17, 2019Assignee: ISUZU MOTORS LIMITEDInventors: Daisuke Sueoka, Naoki Mizukami, Takaya Maeda, Tsutomu Matsunaga
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Publication number: 20180355772Abstract: An oil pan device (1) is provided with an oil pan (10) that is attached to a lower end (5a) of a crankcase (5) of an engine, and a drain bolt (50). The oil pan (10) includes a recessed portion (33) formed by recessing a bottom surface portion (32) upward, an inclined portion (35) that sections the recessed portion (33), and a bolt hole (36) that is provided in the inclined portion (35), and when the drain bolt (50) is attached to the bolt hole (36), a head portion (52) of the drain bolt (50) is accommodated in the recessed portion (33).Type: ApplicationFiled: November 11, 2016Publication date: December 13, 2018Inventors: Takaya MAEDA, Naoki MIZUKAMI, Tsutomu MATSUNAGA, Isao KITSUKAWA
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Publication number: 20180347683Abstract: A transmission assembly structure includes an engine-side joining surface, a transmission-side joining surface, which is joined to the engine-side joining surface, an engine component which is provided on an outside of the engine-side joining surface in a radial direction in the flywheel housing and protrudes toward the transmission side, a guide member which is provided on the engine-side joining surface or in the vicinity of the engine-side joining surface of the flywheel housing and in a vicinity of the engine component and which protrudes toward the transmission side further than the engine component, and a guide hole, which is provided on the transmission-side joining surface of the transmission housing or in the vicinity of the transmission-side joining surface and into which the guide member is inserted.Type: ApplicationFiled: November 11, 2016Publication date: December 6, 2018Inventors: Tsutomu MATSUNAGA, Naoki MIZUKAMI, Daisuke SUEOKA, Isao KITSUKAWA
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Publication number: 20180335111Abstract: A cam shaft drive device includes a chain, a guide lever, a chain chamber, which is provided in a cylinder head, a support bolt, which pivotably supports the guide lever, the support bolt including a head portion, a male screw portion, and a shaft portion, which is inserted through the support hole of the guide lever, an insertion hole, which is through which the support bolt is inserted, and a female screw hole, which is provided in the rear wall and into which the male screw portion is screwed, wherein a length from a rear end to a front end of the shaft portion is longer than an axial distance from a front end of the support hole to a front end of the insertion hole in a state where the guide lever abuts on the rear wall.Type: ApplicationFiled: November 11, 2016Publication date: November 22, 2018Inventors: Tsutomu MATSUNAGA, Naoki MIZUKAMI, Kazuhiro HIROSE
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Publication number: 20180334935Abstract: Provided is a grounding structure for an internal combustion engine, including a resinous body 2 configured to be fastened to an engine body 7 via a bolt 8, an electric component 5 attached to the body 2, and a conductive member 16 provided to electrically connect the electric component 5 to the bolt 8 in order to ground the electric component 5 to the engine body 7.Type: ApplicationFiled: November 9, 2016Publication date: November 22, 2018Inventors: Daisuke SUEOKA, Naoki MIZUKAMI, Takaya MAEDA, Tsutomu MATSUNAGA
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Patent number: 4398000Abstract: A solid type golf ball comprising a central core and an outer cover for the core and having an excellent flight performance and durability and acceptable "click" characteristics is presented. The main component of the outer cover of this golf ball is a polyetherester block copolymer containing the following X, Y and Z units:X: Butylene terephthalate unitY: Ester unit other than butylene terephthalateZ: Polyetherester unit derived from a dicarboxylic acid component containing terephthalic acid and poly(alkylene oxide) glycol having a number average molecular weight of 400 through 3000, wherein the X, Y and Z units are present in the following amounts:30% by weight .ltoreq.X.ltoreq.80% by weight0% by weight .ltoreq.Y.ltoreq.50% by weight20% by weight .ltoreq.Z.ltoreq.70% by weight.Type: GrantFiled: August 7, 1981Date of Patent: August 9, 1983Assignees: Bridgestone Tire Co., Ltd., Toray Industries, Inc.Inventors: Nobuyuki Kataoka, Tasuku Saito, Tsutomu Matsunaga, Chiaki Tanaka, Yoko Furuta, Nagayoshi Naito
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Patent number: 4353557Abstract: A golf ball having a large carry having a core, a rubber thread layer and a cover layer, in which the rubber thread is composed of a rubber composition consisting essentially of 100 parts by weight of natural rubber and/or cis-1,4-polyisoprene and 2-20 parts by weight of carbon black.Type: GrantFiled: March 3, 1980Date of Patent: October 12, 1982Assignee: Bridgestone Tire Company, LimitedInventors: Ryota Kajita, Tasuku Saito, Tsutomu Matsunaga, Sakae Inoue, Masayuki Ohtake
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Patent number: 4337946Abstract: A golf ball having an intermediate layer of thermoplastic resin between a thread-wound central core and an outer polyester elastomer layer. The thermoplastic resin has a substantial melt flow initiation temperature of 160.degree. C. or less, the substantial melt flow initiation temperature being the minimum temperature at which the melt index under a load of 4350 g. becomes 1 g/10 mins or more, and has a high adhesion property to the polyester elastomer cover. It is preferable that the thermoplastic resin have a resilience of 30% or more and that the intermediate layer of thermoplastic resin be within the range of 0.1 to 1.0 mm. This golf ball has excellent cutting resistance, "click" characteristics and impact resilience.Type: GrantFiled: November 6, 1980Date of Patent: July 6, 1982Assignees: Toray Industries, Inc., Bridgestone Tire Company LimitedInventors: Tasuku Saito, Tutomu Noma, Tsutomu Matsunaga, Nagayoshi Naito, Chiaki Tanaka, Motoki Hiratsuka
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Patent number: 4337947Abstract: An improved golf ball having a thread-wound central core and an outer cover is provided. The outer cover is composed of a composition comprising (a) at least one ionomer which is a copolymer of at least one .alpha.-olefin and at least one .alpha.,.beta.-unsaturated carboxylic acid to which copolymer at least one metal ion selected from the group consisting of monovalent, divalent and trivalent metal ions is added and (b) at least one polyester elastomer, the content, in said composition, of said polyester elastomer being 50% by weight or less. This golf ball has excellent cutting resistance, "click" characteristics and impact resilience.Type: GrantFiled: November 21, 1980Date of Patent: July 6, 1982Assignees: Bridgestone Tire Co., Ltd., Toray Industries, Inc.Inventors: Tasuku Saito, Tutomu Noma, Tsutomu Matsunaga, Chiaki Tanaka, Yoko Furuta, Nagayoshi Naito
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Patent number: 4295652Abstract: A golf ball having a thread-wound core and a cover formed of a block copolyetherester comprising (A) a terephthalic acid unit, (B) a 1,4-butanediol unit, (C) a unit of a dicarboxylic acid, other than terephthalic acid, or a short-chain diol, other than 1,4-butanediol, having a number-average molecular weight of not more than 300 and (D) a poly(alkylene oxide)glycol unit having a number-average molecular weight of from 500 to 3000. Said golf ball exhibits excellent impact resilience and also exhibits good cutting resistance and "click".Type: GrantFiled: February 8, 1980Date of Patent: October 20, 1981Assignees: Bridgestone Tire Co., Ltd., Toray Industries, Inc.Inventors: Tasuku Saito, Tutomu Noma, Tsutomu Matsunaga, Nagayoshi Naito, Chiaki Tanaka, Motoki Hiratsuka
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Patent number: 4075275Abstract: A method for casting pneumatic tires by pouring a fluidized tire-forming material into a molding cavity defined between the outer peripheral surface of a separable hard core of a mold assembly and the inner peripheral surface of an outer separable hard mold member of the mold assembly. The separable hard core is composed of at least three segments and toroidal in shape. At least one segment of the separable core is retracted in a radial direction and then moved in a direction which does not hinder retractive movement of the remaining segments and subsequently these remaining segments are retracted in the radial direction, whereby the cast tire can easily be removed from the mold assembly.Type: GrantFiled: August 4, 1976Date of Patent: February 21, 1978Assignee: Bridgestone Tire Company LimitedInventors: Kazuhiro Nishimura, Jumei Harada, Tetsuhiko Migita, Tsutomu Matsunaga
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Patent number: 4064215Abstract: A tubular tire for bicycle, automobile and the like, having a tubular cross section and comprising a tread portion, side portions and a bottom portion, is manufactured by molding a base tire composed of the side portions and the bottom portion from a fluidizable high polymer material by means of a split mold assembly and then molding the tread portion and hence a tire product from a fluidizable high polymer material by means of a centrifugal molding machine. The split mold assembly comprises a core having an outer peripheral surface coincident with an inner profile of the base tire and separable mold members having an inner peripheral surface coincident with an outer profile of the base tire.Type: GrantFiled: March 8, 1976Date of Patent: December 20, 1977Assignee: Bridgestone Tire Company LimitedInventors: Jumei Halada, Hiromi Akiyoshi, Tsutomu Matsunaga
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Patent number: 3994650Abstract: A method of and apparatus for casting pneumatic tires by pouring a fluidized tire-forming material into a molding cavity defined between the outer peripheral surface of a separable hard core of a mold assembly and the inner peripheral surface of an outer separable hard mold member of the mold assembly. The separable hard core is composed of at least three segments and toroidal in shape. At least one segment of the separable core guidingly is retracted in a radial direction and then moved in a direction which does not hinder retractive movement of the remaining segments and subsequently these remaining segments are retracted in the radial direction, whereby the cast tire can easily be removed from the mold assembly.Type: GrantFiled: April 15, 1975Date of Patent: November 30, 1976Assignee: Bridgestone Tire Company LimitedInventors: Kazuhiro Nishimura, Jumei Harada, Tetsuhiko Migita, Tsutomu Matsunaga
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Patent number: 3968182Abstract: Urethane rubber composition having an improved cut-crack resistance and a high modulus is obtained by incorporating chopped organic fibers having a diameter of 1-50.mu. and an aspect ratio of 50-1,000 to urethane rubber.Type: GrantFiled: June 5, 1974Date of Patent: July 6, 1976Assignee: Bridgestone Tire Company LimitedInventors: Sakae Inoue, Toshio Nishi, Shoson Shibata, Tsutomu Matsunaga, Yoshio Kaneko
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Patent number: 3963681Abstract: Polyether urethane elastomer composition having improved mechanical properties has been prepared by using polyfunctional isocyanate, curing agent and polyether having active hydrogen terminal groups, wherein the weight average molecular weight of said polyether is within the range of 1,000 to less than 4,500 and the molecular weight distribution curve of said polyether has at least two peaks, at least one of which is located in the higher molecular weight region and at least another one of which is located in the lower molecular weight region than the rheological critical molecular weight of said polyether and wherein the equivalent ratio (d) of active hydrogen of a curing agent to the isocyanate group of said polyfunctional isocyanate is in the range of 0.9<d<1.2.Type: GrantFiled: June 27, 1974Date of Patent: June 15, 1976Assignee: Bridgestone Tire Company LimitedInventors: Yoshio Kaneko, Yoji Watabe, Tsutomu Matsunaga, Shigeyuki Toki, Yutaka Iseda
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Patent number: 3932088Abstract: A flexible annular core for the production of hollow toroidal rubber shells, particularly pneumatic tires, composed of a pair of bead portions, each of which is composed of beads, a reinforcing layer folded back so as to enclose the beads, and elastomer layers covering the reinforcing layer, and a flexible shell portion composed of the reinforcing layer covered with the elastomer layers and extending across the bead portions. The bead portion of said flexible annular core is composed of the reinforcing layer and the elastomer layer adhered with each other. The flexible shell portion of said core is composed of the reinforcing layer and the elastomer layer not adhered with each other.Type: GrantFiled: July 31, 1974Date of Patent: January 13, 1976Assignee: Bridgestone Tire Company LimitedInventors: Jumei Harada, Kenji Tsukamoto, Tetsuhiko Migita, Tsutomu Matsunaga