Patents by Inventor Masamichi Miwa
Masamichi Miwa 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: 11326653Abstract: A clutch hub which is engaged with the clutch plates in an outer circumference is a press-molding article made from one steel sheet. In its inner circumferential surface, plural oil grooves for cooling the clutch plates, which are extended to a shaft direction and have a space in a circumferential direction. Each of dams as a press-molding portion extending to radial inward is formed at an end portion of each of the oil groove. The dams include an upright front surface and a back surface, and the bottom surfaces and both side surfaces of the oil grooves are integrated with the dams at the front surface side and the back surface side.Type: GrantFiled: August 10, 2018Date of Patent: May 10, 2022Assignee: UNIPRES CORPORATIONInventors: Daichi Watanabe, Masamichi Miwa, Ryosuke Suzuki, Hideyuki Nezu
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Patent number: 11125306Abstract: The present invention relates to relates to an improvement of a dividing wall for a primary pulley in a belt-type continuously variable transmission. It is an object of the present invention to obtain a desired strength characteristic without performing a soft nitriding treatment and achieve cost reduction. A hydraulic pressure chamber is formed between the dividing wall and the movable sheave, and the dividing wall comprises a small-diameter annular disc portion 32 extended from the central cylinder portion 30, which is attached to a rotational shaft, in a radial direction. In the small-diameter annular disc portion 32, a connecting portion which is connected to an intermediate body portion 34 is a bent portion 38 which is bent at substantially 90 [deg].Type: GrantFiled: February 8, 2018Date of Patent: September 21, 2021Assignee: UNIPRES CORPORATIONInventors: Nobuhiko Furuya, Masamichi Miwa, Toshiyuki Ichikawa, Katsuyo Fukumoto, Yosuke Sugisawa, Tsutomu Kaji
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Publication number: 20200246857Abstract: An object of the present invention is to extend a retention time of clutch oil and enable to efficiently cool clutch plates. A clutch hub (42) which is engaged with the clutch plates in an outer circumference is a press-molding article made from one steel sheet. In its inner circumferential surface, plural oil grooves (74-4) for cooling the clutch plates, which are extended to a shat direction and have a space in a circumferential direction. Each of dams (76) as a press-molding portion extending to radial inward is formed at an end portion of each of the oil groove (74-4). The press-molding of the dams (76) is performed by pressing a front surface side of the clutch hub (42) by punches (82) and disposing inner pressing tools (84) at a back surface side. The dams (76) comprise an upright front surface (76-1) and a back surface (76-2), which are a molding surface molded by using the molding tools.Type: ApplicationFiled: August 10, 2018Publication date: August 6, 2020Applicant: UNIPRES CORPORATIONInventors: Daichi WATANABE, Masamichi MIWA, Ryosuke SUZUKI, Hideyuki NEZU
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Publication number: 20190346026Abstract: The present invention relates to relates to an improvement of a dividing wall for a primary pulley in a belt-type continuously variable transmission. It is an object of the present invention to obtain a desired strength characteristic without performing a soft nitriding treatment and achieve cost reduction. A hydraulic pressure chamber is formed between the dividing wall and the movable sheave, and the dividing wall comprises a small-diameter annular disc portion 32 extended from the central cylinder portion 30, which is attached to a rotational shaft, in a radial direction. In the small-diameter annular disc portion 32, a connecting portion which is connected to an intermediate body portion 34 is a bent portion 38 which is bent at substantially 90 [deg].Type: ApplicationFiled: February 8, 2018Publication date: November 14, 2019Applicant: UNIPRES CORPORATIONInventors: Nobuhiko FURUYA, Masamichi MIWA, Toshiyuki ICHIKAWA, Katsuyo FUKUMOTO, Yosuke SUGISAWA, Tsutomu KAJI
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Publication number: 20180172034Abstract: A plunger member 3 used for a belt type continuously variable transmission is configured by cold press molding a blank material 32 according to deep-drawing molding, and closed forging, compression molding or a combined molding thereof, where during the cold press molding, a thickness of a bent corner portion 3f, which at least makes a sleeve portion 3c and a step-like formed portion (spring seating portion) 3d continuous to each other, is configured to be increased by 30% or more relative to a thickness of the blank material 32, and then a hardened surface layer 3B is configured to be formed on both of the entire front and back sides of the plunger member by performing a soft nitriding treatment.Type: ApplicationFiled: February 15, 2018Publication date: June 21, 2018Inventors: Masamichi MIWA, Katsuyo FUKUMOTO, Ryuta MORI, Yosuke SUGISAWA, Teruki HAYASHIDA
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Patent number: 7753351Abstract: The disclosed clamp device for clamping blank pieces may comprise a mounting table, first and second clamping units, positioning units, and lock units. The mounting table is for placing thereon first and second blank pieces. The first and second clamping units have respective clamp plates that are able to be put on the first and second blank pieces while permitting a guided movement of the first and second blank pieces on the mounting table. The positioning units move the first and second blank pieces to establish a positioning of the first and second blank pieces on the mounting table. The lock units apply a given force to the first and second clamp plates to lock the first and second blank pieces.Type: GrantFiled: May 27, 2008Date of Patent: July 13, 2010Assignee: Nissan Motor Co., Ltd.Inventors: Masatoshi Yajima, Shouhei Imai, Norio Kawano, Masamichi Miwa
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Publication number: 20080224376Abstract: The disclosed clamp device for clamping blank pieces may comprise a mounting table, first and second clamping units, positioning units, and lock units. The mounting table is for placing thereon first and second blank pieces. The first and second clamping units have respective clamp plates that are able to be put on the first and second blank pieces while permitting a guided movement of the first and second blank pieces on the mounting table. The positioning units move the first and second blank pieces to establish a positioning of the first and second blank pieces on the mounting table. The lock units apply a given force to the first and second clamp plates to lock the first and second blank pieces.Type: ApplicationFiled: May 27, 2008Publication date: September 18, 2008Inventors: Masatoshi YAJIMA, Shouhei Imai, Norio Kawano, Masamichi Miwa
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Patent number: 7377503Abstract: The disclosed clamp device for clamping blank pieces may comprise a mounting table, first and second clamping units, positioning units, and lock units. The mounting table is for placing thereon first and second blank pieces. The first and second clamping units have respective clamp plates that are able to be put on the first and second blank pieces while permitting a guided movement of the first and second blank pieces on the mounting table. The positioning units move the first and second blank pieces to establish a positioning of the first and second blank pieces on the mounting table. The lock units apply a given force to the first and second clamp plates to lock the first and second blank pieces.Type: GrantFiled: March 22, 2005Date of Patent: May 27, 2008Assignee: Nissan Motor Co., Ltd.Inventors: Masatoshi Yajima, Shouhei Imai, Norio Kawano, Masamichi Miwa
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Publication number: 20050218576Abstract: At first, a first blank piece is positioned and locked, then a second blank piece is positioned with the aid of the locked first blank piece in such a manner that a given edge of the second blank piece contacts with a given edge of the locked first blank piece, and then the second blank piece is locked at the position.Type: ApplicationFiled: March 22, 2005Publication date: October 6, 2005Inventors: Masatoshi Yajima, Shouhei Imai, Norio Kawano, Masamichi Miwa