Patents by Inventor Takashi Tohara
Takashi Tohara 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: 11756769Abstract: A plasma processing apparatus includes: a chamber accommodating a plurality of substrates; a plurality of substrate supports provided inside the chamber and configured to support a substrate; a plurality of radio-frequency power sources provided corresponding to the plurality of substrate supports, and configured to supply radio-frequency power to the plurality of substrate supports, respectively; and a plurality of shields configured to compart the inside of the chamber and provided corresponding to the plurality of substrate supports to define a processing space where plasma is generated. A radio-frequency current path is formed between the plurality of shields so as not to interfere with one another.Type: GrantFiled: April 2, 2021Date of Patent: September 12, 2023Assignee: TOKYO ELECTRON LIMITEDInventors: Takashi Tohara, Naokazu Furuya, Yosuke Tamuro, Yuzuru Sakai
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Publication number: 20210313151Abstract: A plasma processing apparatus includes: a chamber accommodating a plurality of substrates; a plurality of substrate supports provided inside the chamber and configured to support a substrate; a plurality of radio-frequency power sources provided corresponding to the plurality of substrate supports, and configured to supply radio-frequency power to the plurality of substrate supports, respectively; and a plurality of shields configured to compart the inside of the chamber and provided corresponding to the plurality of substrate supports to define a processing space where plasma is generated. A radio-frequency current path is formed between the plurality of shields so as not to interfere with one another.Type: ApplicationFiled: April 2, 2021Publication date: October 7, 2021Applicant: TOKYO ELECTRON LIMITEDInventors: Takashi TOHARA, Naokazu FURUYA, Yosuke TAMURO, Yuzuru SAKAI
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Patent number: 9051992Abstract: There is provided a silent chain that is reduced in weight and widthwise size by reducing the length of a short pin while preventing the occurrence of excessive stress concentration in the short pin of a rocker pin including a long pin and the short pin. The short pin of the rocker pin extends through all plates of the guide row and all plates of the non-guide row in the width direction. The short pin is provided with a first stopper, and a second stopper. A first end surface of the short pin is prevented from being positioned in a first adjacent pin hole by contact between the first stopper and the first contact portion, and a second end surface of the short pin is prevented from being positioned in a second adjacent pin hole by contact between the second stopper and the second contact portion.Type: GrantFiled: July 22, 2013Date of Patent: June 9, 2015Assignee: TSUBAKIMOTO CHAIN CO.Inventors: Takeo Sasaki, Takashi Tohara
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Patent number: 8888633Abstract: In a silent chain of the inner flank engagement and outer flank seating type, the link plate teeth are arranged so that their rearwardly facing inner flanks protrude slightly beyond the outer flank overlapping link plate teeth in a preceding row when the chain is straight and in tension. The rearwardly facing inner flank is composed of an arc-shaped engagement starting region adjacent the tip and a straight engagement guiding region extending toward the root.Type: GrantFiled: April 19, 2010Date of Patent: November 18, 2014Assignee: Tsubakimoto Chain Co.Inventors: Takashi Tohara, Takayuki Morimoto, Tsuyoshi Kabai, Syouhei Adati
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Patent number: 8708850Abstract: A link plate for a transmission chain composed of a plurality of link plates flexibly connected to one another has a guide-contacting edge for direct sliding contact with a chain guide. The guide-contacting edge is composed of a plurality of surface portions in alternating relationship with a plurality of grooves along the direction of chain travel.Type: GrantFiled: January 7, 2011Date of Patent: April 29, 2014Assignee: Tsubakimoto Chain Co.Inventor: Takashi Tohara
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Publication number: 20140045632Abstract: There is provided a silent chain that is reduced in weight and widthwise size by reducing the length of a short pin while preventing the occurrence of excessive stress concentration in the short pin of a rocker pin including a long pin and the short pin. The short pin of the rocker pin extends through all plates of the guide row and all plates of the non-guide row in the width direction. The short pin is provided with a first stopper, and a second stopper. A first end surface of the short pin is prevented from being positioned in a first adjacent pin hole by contact between the first stopper and the first contact portion, and a second end surface of the short pin is prevented from being positioned in a second adjacent pin hole by contact between the second stopper and the second contact portion.Type: ApplicationFiled: July 22, 2013Publication date: February 13, 2014Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Takeo Sasaki, Takashi Tohara
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Patent number: 8088029Abstract: In a chain transmission, the guide-contacting portions of inner and outer plates of a chain each comprise a pair of front and rear flat surfaces, an intermediate concave oil-retaining surface and convex connecting surfaces. The lengths of the flat surfaces are such that adjacent flat surfaces of overlapping inner and outer plates overlap even when the plates in contact with the portion of a convex guide surface having the smallest radius of curvature.Type: GrantFiled: August 8, 2008Date of Patent: January 3, 2012Assignee: Tsubakimoto Chain Co.Inventors: Takashi Tohara, Tatsuya Konishi, Toyonaga Saitoh
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Publication number: 20110183800Abstract: A link plate for a transmission chain composed of a plurality of link plates flexibly connected to one another has a guide-contacting edge for direct sliding contact with a chain guide. The guide-contacting edge is composed of a plurality of surface portions in alternating relationship with a plurality of grooves along the direction of chain travel.Type: ApplicationFiled: January 7, 2011Publication date: July 28, 2011Applicant: TSUBAKIMOTO CHAIN CO.Inventor: Takashi Tohara
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Patent number: 7963872Abstract: The plates of transmission chain for an engine are formed with a guide-contacting configuration composed of spaced flat surfaces that come into sliding contact with a flat chain guide, and convex surfaces, continuous with and between the flat surfaces, for sliding contact with a convex chain guide. The convex surfaces are connected by a concave surface that, with the guide surface, forms an oil-retaining clearance. The radius of curvature of the convex curved surfaces of the plate preferably increases gradually from the location where they meet the flat surfaces toward the location where they meet the concave surface. The plates can have the same configuration on the side facing the inside of chain loop as on the side facing the outside of the chain loop.Type: GrantFiled: May 22, 2008Date of Patent: June 21, 2011Assignee: Tsubakimoto Chain Co.Inventors: Takashi Tohara, Tatsuya Konishi
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Publication number: 20100304910Abstract: In a silent chain of the inner flank engagement and outer flank seating type, the link plate teeth are arranged so that their rearwardly facing inner flanks protrude slightly beyond the outer flank overlapping link plate teeth in a preceding row when the chain is straight and in tension. The rearwardly facing inner flank is composed of an arc-shaped engagement starting region adjacent the tip and a straight engagement guiding region extending toward the root.Type: ApplicationFiled: April 19, 2010Publication date: December 2, 2010Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Takashi Tohara, Takayuki Morimoto, Tsuyoshi Kabai, Syouhei Adati
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Patent number: 7837583Abstract: In a silent chain, link plates having two different back heights are arranged so that V-shaped oil guiding walls, opening in the direction of chain travel, are formed on the back of the chain that comes into sliding contact with the shoe of a chain guide.Type: GrantFiled: June 20, 2008Date of Patent: November 23, 2010Assignee: Tsubakimoto Chain Co.Inventor: Takashi Tohara
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Publication number: 20090186729Abstract: In a silent chain, interleaved toothed link plates in guide rows and non-guide rows are articulably connected by connecting pins fixed to guide plates at the outer ends of the guide rows. In each guide row, the connecting pins are bent in such a way that the central portions of the connecting pins are closer to each other than the end portions when the chain is under moderate tension or no tension. As greater tension is applied to the chain, the bent connecting pins become substantially straight and are brought into substantially uniform contact with pin holes in the plates.Type: ApplicationFiled: December 12, 2008Publication date: July 23, 2009Applicant: TSUBAKIMOTO CHAIN CO.Inventor: Takashi Tohara
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Publication number: 20090186732Abstract: In a silent chain having guide rows composed of guide plates, and inner guide row plates, the guide row plates being connected, by connecting pins, in alternating, interleaved relationship with plates of non-guide rows, the diameters of the pin holes in the plates of each non-guide row vary with increasing distance from the guide plates. Optionally the diameters of the inner plates in the guide rows can also vary with increasing distance from the guide plates.Type: ApplicationFiled: December 16, 2008Publication date: July 23, 2009Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Takashi Tohara, Toyonaga Saito
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Publication number: 20090186730Abstract: In a silent chain, the outer diameter of each connecting pin gradually increases from its ends toward a central region at an intermediate location between its ends, whereby the diameter of each pin is greatest in its central region. The pin holes of the inner plates can have the same inner diameter, which can be slightly larger than the largest outer diameter of the connecting pins. The gradual increase in the outer diameter of each pin is sufficiently small that, when a tensile load is applied to the chain, a connecting pin can be flexed by abutting inner surfaces of the pin holes of the chain's non-guide row plates, by an amount sufficient to make the abutment region of the pin substantially straight and in substantially uniform contact with the abutting inner surfaces of the pin holes.Type: ApplicationFiled: December 12, 2008Publication date: July 23, 2009Applicant: TSUBAKIMOTO CHAIN CO.Inventor: Takashi Tohara
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Publication number: 20090186731Abstract: In a silent chain having guide rows composed of guide plates, and inner guide row plates, and connected, by connecting pins, in alternating, interleaved relationship with plates of non-guide rows, the pitches of the pin holes in the plates of each non-guide row vary with increasing distance from the guide plates. Optionally the pitches of the inner plates in the guide rows can also vary with increasing distance from the guide plates. The pin holes of the non-centrally located non-guide row plates, and optionally, the pin holes of the non-centrally located inner guide row plates, can also be slanted to conform to the surfaces of the connecting pins when the pins are flexed as a result of tensile force applied to the chain.Type: ApplicationFiled: December 16, 2008Publication date: July 23, 2009Applicant: TSUBAKIMOTO CHAIN CO.Inventor: Takashi Tohara
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Publication number: 20090111626Abstract: In a chain transmission, the guide-contacting portions of inner and outer plates of a chain each comprise a pair of front and rear flat surfaces, an intermediate concave oil-retaining surface and convex connecting surfaces. The lengths of the flat surfaces are such that adjacent flat surfaces of overlapping inner and outer plates overlap even when the plates in contact with the portion of a convex guide surface having the smallest radius of curvature.Type: ApplicationFiled: August 8, 2008Publication date: April 30, 2009Applicant: TSUBAKIMOTO CHAIN CO.Inventors: Takashi Tohara, Tatsuya Konishi, Toyonaga Saitoh
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Patent number: 7497795Abstract: In an endless silent chain composed of alternating guide link rows and joint link rows connected by connecting pins, each guide link row is composed of a stack of three, centrally located, link plates and two outer guide plates, and each joint link row is composed of two pairs of link plates in abutting, side-by-side relationship. The pairs of link plates of the joint link rows extend into the spaces between the guide plates and the centrally located stack of each of two adjacent guide link rows.Type: GrantFiled: October 11, 2005Date of Patent: March 3, 2009Assignee: Tsubakimoto Chain Co.Inventors: Takashi Tohara, Akira Hirai
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Publication number: 20090042683Abstract: In a silent chain, link plates having two different back heights are arranged so that V-shaped oil guiding walls, opening in the direction of chain travel, are formed on the back of the chain that comes into sliding contact with the shoe of a chain guide.Type: ApplicationFiled: June 20, 2008Publication date: February 12, 2009Applicant: Tsubakimoto Chain Co.Inventor: Takashi Tohara
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Publication number: 20090017951Abstract: The plates of transmission chain for an engine are formed with a guide-contacting configuration composed of spaced flat surfaces that come into sliding contact with a flat chain guide, and convex surfaces, continuous with and between the flat surfaces, for sliding contact with a convex chain guide. The convex surfaces are connected by a concave surface that, with the guide surface, forms an oil-retaining clearance. The radius of curvature of the convex curved surfaces of the plate preferably increases gradually from the location where they meet the flat surfaces toward the location where they meet the concave surface. The plates can have the same configuration on the side facing the inside of chain loop as on the side facing the outside of the chain loop.Type: ApplicationFiled: May 22, 2008Publication date: January 15, 2009Applicant: Tsubakimoto Chain Co.Inventors: Takashi Tohara, Tatsuya Konishi
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Patent number: 7419449Abstract: A low friction roller chain, bushing chain or silent chain is composed of links in which at least some of the link plates have convex and/or grooved edge surfaces adapted to slide on the surface of a chain guide.Type: GrantFiled: June 18, 2007Date of Patent: September 2, 2008Assignee: Tsubakimoto Chain Co.Inventors: Takashi Tohara, Hiroshi Hashimoto, Toshiyuki Nakajima