Patents by Inventor Tomoyoshi Tsurufuji
Tomoyoshi Tsurufuji 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: 6871441Abstract: In an apparatus for mounting a reel on a fishing rod, a moving hood and a nut member respectively have contact surfaces which are brought into contact with each other. The outer sites in the diametrical direction of the respective contact surfaces are formed as pressure contact surfaces which are forced to contact each other when a fishing-reel fitting leg portion is clamped between a first and a second retaining portion by the clamping and pivotal operation of the nut member with respect to a seat body. The inner sites in the diametrical direction of the respective contact surfaces are formed into a click mechanism for producing a click sound with an elastic body and an engaging portion with which the elastic body detachably engages therewith during the rotation of the nut member.Type: GrantFiled: February 28, 2000Date of Patent: March 29, 2005Assignee: Daiwa Seiko, Inc.Inventor: Tomoyoshi Tsurufuji
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Patent number: 6543178Abstract: In an intra-line fishing rod, a rod tube comprises a synthetic resin as a matrix, and is reinforced by reinforced fibers. A guide is formed integrally with and projects from an inner surface of the rod tube. A cushioning portion is formed between the guide and a body layer of the rod tube which is composed predominantly of axially-extending fibers, and cushioning portions are formed respectively at front and rear sides of the guide connected to the inner surface of the rod tube. The cushioning portions are smaller in bending modulus than a bulge portion region of the guide for contact with a fishline, and the inner surface is formed with a mirror-like smoothness.Type: GrantFiled: October 23, 2001Date of Patent: April 8, 2003Assignee: Daiwa Seiko, Inc.Inventors: Shunji Sunaga, Shoichi Koganei, Masaru Akiba, Tomoyoshi Tsurufuji, Yutaka Kurano, Toyoaki Takimoto, Toshihiro Kurokawa
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Patent number: 6505430Abstract: The invention concerns an intra-line fishing rod which can both reduce the insertion resistance of a fishline and maintain a delicate flexible property. In the intra-line fishing rod with an inserted fishline, the inside diameter of the respective portions (a, b, c) of the top rod portion of the fishing rod is formed in a substantially straight shape having an inclination of {fraction (3/1000)} or less, and reinforcing fibers having different elastic moduli are used in the rod top portions and are sequentially arranged in such a manner not only that the reinforcing fibers extend substantially in the axial direction of the rod top portions but also that the elastic moduli become higher in a geometric series manner from the front portion (a) toward the rear portion (c).Type: GrantFiled: July 9, 1999Date of Patent: January 14, 2003Assignee: Daiwa Seiko Inc.Inventors: Tomoyoshi Tsurufuji, Hiroyuki Ono
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Patent number: 6408562Abstract: In an intra-line fishing rod, a rod tube comprises a synthetic resin as a matrix, and is reinforced by reinforced fibers. A guide is formed integrally with and projects from an inner surface of the rod tube. A cushioning portion is formed between the guide and a body layer of the rod tube which is composed predominantly of axially-extending fibers, and cushioning portions are formed respectively at front and rear sides of the guide connected to the inner surface of the rod tube. The cushioning portions are smaller in bending modulus than a bulge portion region of the guide for contact with a fishline, and the inner surface is formed with a mirror-like smoothness.Type: GrantFiled: November 16, 1995Date of Patent: June 25, 2002Assignee: Daiwa Seiko, Inc.Inventors: Shunji Sunaga, Shoichi Koganei, Masaru Akiba, Tomoyoshi Tsurufuji, Yutaka Kurano, Toyoaki Takimoto, Toshihiro Kurokawa
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Publication number: 20020023380Abstract: In an intra-line fishing rod, a rod tube comprises a synthetic resin as a matrix, and is reinforced by reinforced fibers. A guide is formed integrally with and projects from an inner surface of the rod tube.Type: ApplicationFiled: October 23, 2001Publication date: February 28, 2002Applicant: DAIWA SEIKO, INC.Inventors: Shunji Sunaga, Shoichi Koganei, Masaru Akiba, Tomoyoshi Tsurufuji, Yutaka Kurano, Toyoaki Takimoto, Toshihiro Kurokawa
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Patent number: 6334272Abstract: The invention concerns a fishing rod in which a fishline is passed through the inside thereof. In the fishing rod, one of front and rear rod pipes to be connected together is provided with an enlarged diameter portion for receiving an outer periphery of the other rod pipe. Such enlarged diameter portion reduces a difference between the inside diameters of the front and rear rod pipes, to thereby eliminate the possibility that the fishline can be abutted against the end portion of the rod pipes. Thus, the frictional resistance of the fishline can be decreased, so that the fishline can be smoothly drawn into and out of the rod pipes.Type: GrantFiled: March 5, 1997Date of Patent: January 1, 2002Assignee: Daiwa Seiko, Inc.Inventors: Masaru Akiba, Masayuki Nakagawa, Tomoyoshi Tsurufuji, Shunji Sunaga, Koichi Ito
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Patent number: 6301821Abstract: The invention concerns a durable and good-operability fishing rod which is highly strong and is improved in specific rigidity by preventing excessive resin, reinforced fibers from leaning to one side, and resin pools. The fishing rod has a main layer (12) formed by winding a first prepreg provided by impregnating highly strong fibers with resin so that weight percentage becomes 25% or less so that the fibers are oriented in an axial length direction and a reinforcement layer (14, 16) formed by winding a second prepreg provided by impregnating highly strong fibers with resin so that the fibers are oriented in a direction crossing the fiber orientation of the main layer (12) on at least one side of the inside and outside of the main layer (12). The reinforcement layer (14, 16) is formed thinner than the main layer (12), and resin impregnation percentage of the second prepreg is set to substantially the same as that of the first prepreg.Type: GrantFiled: December 6, 1995Date of Patent: October 16, 2001Assignee: Daiwa Seiko, Inc.Inventors: Hiroyasu Suzue, Kenichi Kameda, Hideyuki Naitou, Tomoyoshi Tsurufuji, Nobuaki Takamatsu
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Patent number: 6266913Abstract: The present disclosure concerns an intra-line fishing rod with at least one fishing line guide member inserted therein. According to the present invention, maintenance of fishing line guide members is facilitated. Support members S1,S2,S3,S4 are mounted inside a rod pipe while respectively supporting fishing line guide members G1,G2,G3,G4 which allow a fishing line to slide smoothly therethrough. The support members and fishing line guide members are positioned and removably mounted inside the rod pipe.Type: GrantFiled: December 21, 1994Date of Patent: July 31, 2001Assignee: Daiwa Seiko, Inc.Inventors: Masaru Akiba, Shuichi Kimura, Kouichi Ito, Tomoyoshi Tsurufuji
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Patent number: 6243981Abstract: An inter-line fishing rod including a joint portion which, when a spirally shaped fishing line guide is disposed in the interior of a rod pipe joined outside, prevents the fishing line from getting caught in the terminated portion of the spirally shaped fishing line guide, thereby allowing the fishing line to be inserted smoothly through the fishing rod.Type: GrantFiled: September 9, 1996Date of Patent: June 12, 2001Assignee: Daiwa SeikoInventors: Yasuo Komura, Yoshinao Katoh, Tomoyoshi Tsurufuji, Takashi Watanabe
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Patent number: 6233862Abstract: An interline fishing rod which not only prevents stress centralization but also includes a fishing line guide and is high in strength. A rod pipe (12) includes a joining portion (12T) in the leading end portion thereof, a forwardly narrowed taper portion (12S) located just in the rear of the joining portion (12T), and a straight or forwardly narrowed and gently tapered rod pipe main body portion (12H) located in the rear of the taper portion (12S). A fishing line guide (RG2) is provided on and protected from the inside wall of the rod pipe main body portion (12H), while the inside diameter (d2) of the fishing line guide (RG2) is set larger than the inside diameters (d0) and (d4). Reinforcing layers (H1, H2) for reinforcing a main body layer are provided in such a manner that it extends from the joining portion (12T) to at least the front-most position of the fishing line guide (RG2).Type: GrantFiled: June 23, 1999Date of Patent: May 22, 2001Assignee: NGB CorporationInventors: Tomoyoshi Tsurufuji, Shoichi Koganei, Eiji Sugaya, Hiroshi Hashimoto, Masaru Akiba, Futoshi Nishikawa, Hiroyasu Suzue, Isao Ohta
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Patent number: 6192615Abstract: An intraline fishing rod includes a hollow rod pipe having an internal surface and an external surface. A plurality of line guide protrusions protrude radially inwardly from the internal surface. Each of the line guide protrusions has front and rear ends, an apex, and front and rear slopes. A water-repellent layer is provided to extend continuously between the line guide protrusions, thereby entirely covering the front and rear ends, the apices and the front and rear slopes of the line guide protrusions and the internal surface of the rod pipe.Type: GrantFiled: January 27, 1999Date of Patent: February 27, 2001Assignee: Daiwa Seiko, Inc.Inventors: Hiroyuki Ono, Eiji Sugaya, Tomoyoshi Tsurufuji
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Patent number: 6154998Abstract: A fishing rod allowing a fishline to pass through which has a fishline lead-in guide member so configured as to provide a larger opening, to perform smoothly the operation of guiding and passing a fishline therethrough and as to be lightweight and simple in structure. A fishline lead-in guide member 4 has laterally symmetrical arm portions 4a installed on the fishing rod 1 and extended forward above a fishline lead-in hole 3a provided in the fishing rod 1. The arm portions 4a form an opening whose width .alpha. is greater than the lateral width .beta. of the fishline lead-in hole. The fishline lead-in guide member also has a fishline guide portion 4e positioned in the rear of the arm portions and provided with a guide hole 15 situated at a level higher than the surface of the fishing rod in the rear of the fishline lead-in hole. The fishline lead-in guide member is mounted in such a manner that at least one of the end portions 4c, 4f of the fishline lead-in guide member is held on the butt grip 1.Type: GrantFiled: August 29, 1996Date of Patent: December 5, 2000Assignee: Daiwa Seiko, Inc.Inventors: Hiroshi Hashimoto, Masaru Akiba, Yasuhisa Kaneda, Tomoyoshi Tsurufuji
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Patent number: 6128849Abstract: The invention relates to a fishing rod with pre-inserted fishing line guide members. A prepreg formed of a high-strength fiber impregnated or mixed with resin is wound to form the rod pipe. A plurality of wide fishing line guide members each having a flat-shaped section are fixed integrally to the inner peripheral surface of the rod pipe, the inner peripheral side portions of the wide fishing line guide members are respectively projected inwardly from the rod pipe inner peripheral surface, and the outer portions of the rod pipe existing in the wide fishing line guide fixed portions are respectively bulged outwardly and widely. The fishing line guide members are strongly fixed to the inner peripheral surface of the rod pipe without lowering the strength of the rod pipe.Type: GrantFiled: June 24, 1997Date of Patent: October 10, 2000Assignee: Daiwa Seiko, Inc.Inventors: Shunji Sunaga, Hiroshi Oda, Tomoyoshi Tsurufuji
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Patent number: 6108959Abstract: An interline fishing rod which not only prevents stress centralization but also includes a fishing line guide and is high in strength. A rod pipe (12) includes a joining portion (12T) in the leading end portion thereof, a forwardly narrowed taper portion (12S) located just in the rear of the joining portion (12T), and a straight or forwardly narrowed and gently tapered rod pipe main body portion (12H) located in the rear of the taper portion (12S). A fishing line guide (RG2) is provided on and projected from the inside wall of the rod pipe main body portion (12H), while the inside diameter (d2) of the fishing line guide (RG2) is set larger than the inside diameters (d0) and (d4). Reinforcing layers (H1, H2) for reinforcing a main body layer are provided in such a manner that it extends from the joining portion (12T) to at least the front-most position of the fishing line guide (RG2).Type: GrantFiled: September 15, 1997Date of Patent: August 29, 2000Assignee: Daiwa Seiko, Inc.Inventors: Tomoyoshi Tsurufuji, Shoichi Koganei, Eiji Sugaya, Hiroshi Hashimoto, Masaru Akiba, Futoshi Nishikawa, Hiroyasu Suzue, Isao Ohta
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Patent number: 6048425Abstract: The invention relates to a fishing rod with preinserted fishing line guide members. A prepreg formed of a high-strength fiber impregnated or mixed with resin is wound to form the rod pipe. A plurality of wide fishing line guide members each having a flat-shaped section are fixed integrally to the inner peripheral surface of the rod pipe, the inner peripheral side portions of the wide fishing line guide members are respectively projected inwardly from the rod pipe inner peripheral surface, and the outer portions of the rod pipe existing in the wide fishing line guide fixed portions are respectively bulged outwardly and widely. The fishing line guide members are strongly fixed to the inner peripheral surface of the rod pipe without lowering the strength of the rod pipe.Type: GrantFiled: February 20, 1996Date of Patent: April 11, 2000Assignee: Daiwa Seiko, Inc.Inventors: Shunji Sunaga, Hiroshi Oda, Tomoyoshi Tsurufuji
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Patent number: 6037039Abstract: The invention concerns a biodegradable article which can be used for a period of time of normal use while the performance and quality are maintained high and further the biodegradable article exhibits an excellent biodegradability in the natural environment. The biodegradable article includes: a member body made of biodegradable material having a predetermined profile; and a coat formed on a surface of the member body, wherein the coat delays the biodegradation of the member body for a predetermined period of time.Type: GrantFiled: November 4, 1996Date of Patent: March 14, 2000Assignee: Daiwa Seiko, Inc.Inventors: Mamoru Koike, Tomoyoshi Tsurufuji
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Patent number: 5979103Abstract: The invention relates to a fishing rod with pre-inserted fishing line guide members. A prepreg formed of a high-strength fiber impregnated or mixed with resin is wound to form the rod pipe. A plurality of wide fishing line guide members each having a flat-shaped section are fixed integrally to the inner peripheral surface of the rod pipe, the inner peripheral side portions of the wide fishing line guide members are respectively projected inwardly from the rod pipe inner peripheral surface, and the outer portions of the rod pipe existing in the wide fishing line guide fixed portions are respectively bulged outwardly and widely. The fishing line guide members are strongly fixed to the inner peripheral surface of the rod pipe without lowering the strength of the rod pipe.Type: GrantFiled: August 31, 1994Date of Patent: November 9, 1999Assignee: Daiwa Seiko, Inc.Inventors: Shunji Sunaga, Hiroshi Oda, Tomoyoshi Tsurufuji
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Patent number: 5926992Abstract: The invention concerns an intra-line fishing rod which can both reduce the insertion resistance of a fishline and maintain a delicate flexible property. In the intra-line fishing rod with an inserted fishline, the inside diameter of the respective portions (a, b, c) of the top rod portion of the fishing rod is formed in a substantially straight shape having an inclination of 3/1000 or less, and reinforcing fibers having different elastic moduli are used in the rod top portions and are sequentially arranged in such a manner not only that the reinforcing fibers extend substantially in the axial direction of the rod top portions but also that the elastic moduli become higher in a geometric series manner from the front portion (a) toward the rear portion (c).Type: GrantFiled: September 6, 1995Date of Patent: July 27, 1999Assignee: Daiwa Seiko, Inc.Inventors: Tomoyoshi Tsurufuji, Hiroyuki Ono
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Patent number: 5832653Abstract: The invention concerns an inter-line fishing rod excellent in line throwing performance with which the terminal hook device can be accurately thrown even far. An inter-line fishing rod comprises: a handle having a reel mounting seat on one side, and grips; a rod body connected to the front end portion of the handle, into which no fishing line is inserted; a rod pipe connected to the front end portion of the rod body in such a manner that the rod pipe is inclined with respect to the rod body towards the other side of the handle which is opposite to the one side thereof where the reel mounting seat is provided, the rod pipe having a fishing-line lead-in guide at the rear end through which a fishing line is inserted into the rod pipe.Type: GrantFiled: July 28, 1995Date of Patent: November 10, 1998Assignee: Daiwa Seiko, Inc.Inventor: Tomoyoshi Tsurufuji
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Patent number: 5829182Abstract: The invention concerns an intra-line fishing rod. In an embodiment, loose fishline guide members (8, 8', 8") are provided in such a manner that they are projected into the interior of a large diameter rod pipe (2) and can be held there. The loose fishline guide members (8, 8', 8") are also structured such that, when a small diameter rod pipe (3) jointed to the leading end of the large diameter rod pipe (2) is stored into the interior of the large diameter rod pipe (2), the loose fishline guide members can be moved backwardly from their respective provision positions.Type: GrantFiled: November 14, 1995Date of Patent: November 3, 1998Inventors: Toshihisa Okamoto, Masaru Akiba, Shigeru Yamamoto, Tomoyoshi Tsurufuji