Patents by Inventor Toshihiro Aoyama
Toshihiro Aoyama 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: 8844692Abstract: A fluid pressure control device controls input and output of a fluid pressure to and from a fluid chamber in a device that transfers power from a motor via working fluid in the chamber, the chamber being partitioned into engagement and disengagement oil chambers by a lock-up clutch. A signal pressure output valve performs pressure regulation to output a signal pressure. The control device includes a control valve connected to an output source flow passage leading to an output source of the fluid pressure, and a control unit controlling the signal pressure output valve so the control valve establishes a first state when the lock-up clutch is turned off, establishes a third state when the lock-up clutch is turned on, and establishes a second state so the working fluid can be confined in the disengagement oil chamber when the lock-up clutch is switched on.Type: GrantFiled: September 21, 2011Date of Patent: September 30, 2014Assignees: Aisin Aw Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Akira Fukatsu, Hiroshi Tanaka, Toshiaki Hayashi, Toshihiro Aoyama
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Patent number: 8393999Abstract: In a hydraulic control system for a transmission, line pressure Pl is adjusted in accordance with a second solenoid pressure Psls if the ratio of a first sheave pressure Pin with respect to a second solenoid pressure Psls is equal to or less than the gain ?. If not so, the line pressure Pl is adjusted in accordance with the first sheave pressure Pin. Consequently, the gain ? of the first sheave pressure Pin with respect to a first solenoid pressure Pslp at a first sheave pressure adjustment valve 16 and the gain ? of a second sheave pressure Pout with respect to the second solenoid pressure Psls at a second sheave pressure adjustment valve 17 can be individually set while the line pressure Pl can be suppressed to the substantially requisite minimum in the entire control region.Type: GrantFiled: August 25, 2008Date of Patent: March 12, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yusuke Ogata, Ryoji Habuchi, Toshihiro Aoyama
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Patent number: 8360907Abstract: A hydraulic control system of continuously variable transmission includes: a first sheave pressure regulating valve (17) that regulates a line pressure (Pl), which is used for hydraulic control as a source pressure, to obtain a first sheave pressure (Pin); a fail-safe valve (19) that selects and outputs any one of the first sheave pressure (Pin) or a fail-safe hydraulic pressure (second sheave pressure Pout) that is applied to a drive pulley (21) at the time of a failure due to an excessive first sheave pressure (Pin) to the drive pulley (21); and an orifice (25) that is provided in an oil passage (24) between the fail-safe valve (19) and the drive pulley (21). Then, a hydraulic pressure in the oil passage (24) on the drive pulley (21) side of the orifice (25) is supplied to the first sheave pressure regulating valve (17) as a feedback pressure.Type: GrantFiled: December 23, 2008Date of Patent: January 29, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yusuke Ogata, Toshihiro Aoyama
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Patent number: 8287409Abstract: A hydraulic control system of continuously variable transmission includes: a first sheave pressure regulating valve (17) that regulates a line pressure (Pl), which is used for hydraulic control as a source pressure, to obtain a first sheave pressure (Pin); a fail-safe valve (19) that selects and outputs any one of the first sheave pressure (Pin) or a fail-safe hydraulic pressure (second sheave pressure Pout) that is applied to a drive pulley (21) at the time of a failure due to an excessive first sheave pressure (Pin) to the drive pulley (21); and a first regulator valve (12) and a second regulator valve (13) that regulate the line pressure (Pl). An output pressure (Psf) of the fail-safe valve (19) is supplied to the first and second regulator valves (12 and 13) in a feedback manner as a drive pulley (21) side hydraulic pressure to thereby regulate the line pressure (Pl).Type: GrantFiled: December 23, 2008Date of Patent: October 16, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yusuke Ogata, Toshihiro Aoyama
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Patent number: 8202197Abstract: A hydraulic pressure control apparatus includes a primary regulator valve that regulates a pressure discharged from an oil pump to form a line pressure that is used as an original pressure for a hydraulic pressure that is supplied to each element, and a secondary regulator valve that regulates a hydraulic pressure downstream of the primary regulator valve to form a secondary pressure. Two pilot pressures (first modulator hydraulic pressure, control hydraulic pressure from a duty solenoid) are supplied to the secondary regulator valve. The secondary regulator valve is configured in such a manner that when one of the pilot pressures changes, a change in the one of the pilot pressures is absorbed by the other pilot pressure.Type: GrantFiled: April 24, 2009Date of Patent: June 19, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yusuke Ogata, Toshihiro Aoyama
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Publication number: 20120073924Abstract: A fluid pressure control device controls input and output of a fluid pressure to and from a fluid chamber in a device that transfers power from a motor via working fluid in the chamber, the chamber being partitioned into engagement and disengagement oil chambers by a lock-up clutch. A signal pressure output valve performs pressure regulation to output a signal pressure. The control device includes a control valve connected to an output source flow passage leading to an output source of the fluid pressure, and a control unit controlling the signal pressure output valve so the control valve establishes a first state when the lock-up clutch is turned off, establishes a third state when the lock-up clutch is turned on, and establishes a second state so the working fluid can be confined in the disengagement oil chamber when the lock-up clutch is switched on.Type: ApplicationFiled: September 21, 2011Publication date: March 29, 2012Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, AISIN AW CO., LTD.Inventors: Akira FUKATSU, Hiroshi TANAKA, Toshiaki HAYASHI, Toshihiro AOYAMA
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Patent number: 8118080Abstract: By pouring, by means of pressure, melted liquid of magnesium or magnesium alloy into a hollow portion which is formed using a casting mold, a valve body where a channel groove for hydraulic oil for use in a speed change operation of the automatic transmission is formed. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. As the magnesium has small heat capacity, variation of the temperature of the mold during the cooling and heating cycle can be suppressed. Moreover, as the magnesium melted liquid has no reactivity with respect to the casting mold, the convex portion is not deteriorated. This allows employment of a mold having a thinner convex portion formed thereon, and therefore formation of a valve body having a narrower channel groove.Type: GrantFiled: August 30, 2010Date of Patent: February 21, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshihiro Aoyama, Shinichi Itou, Akira Murakami, Tomoyasu Kitano
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Patent number: 7918753Abstract: A hydraulic control unit (18), for a power transmission system having an oil receiving device (26,37), which controls a power transmitting condition of the power transmission system, and an oil reserving device for feeding the oil to the oil receiving device, wherein the oil reserving device comprises a piston (59) in which a diametrically large portion and a diametrically small portion are arranged integrally and coaxially, a first hydraulic chamber (57) in which the diametrically large portion, and a second hydraulic chamber (58) in which the diametrically small portion are housed liquid-tightly and movably back and forth; and an oil feeding amount control device for feeding the oil of the first hydraulic chamber to the oil receiving device, by raising the oil pressure in the second hydraulic chamber (58) to operate the piston (59).Type: GrantFiled: June 9, 2005Date of Patent: April 5, 2011Assignee: Toyota Jidosha Kabushiki KaishaInventors: Akira Murakami, Makoto Funahashi, Shinichi Ito, Toshihiro Aoyama, Michio Yoshida, Ryuji Ibaraki, Takashi Kuwabara, Toshiya Yamashita
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Publication number: 20100327210Abstract: By pouring, by means of pressure, melted liquid of magnesium or magnesium alloy into a hollow portion which is formed using a casting mold, a valve body where a channel groove for hydraulic oil for use in a speed change operation of the automatic transmission is formed. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. As the magnesium has small heat capacity, variation of the temperature of the mold during the cooling and heating cycle can be suppressed. Moreover, as the magnesium melted liquid has no reactivity with respect to the casting mold, the convex portion is not deteriorated. This allows employment of a mold having a thinner convex portion formed thereon, and therefore formation of a valve body having a narrower channel groove.Type: ApplicationFiled: August 30, 2010Publication date: December 30, 2010Inventors: Toshihiro Aoyama, Shinichi Itou, Akira Murakami, Tomoyasu Kitano
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Patent number: 7854250Abstract: By pouring, by means of pressure, melted liquid of magnesium or magnesium alloy into a hollow portion which is formed using a casting mold, a valve body where a channel groove for hydraulic oil for use in a speed change operation of the automatic transmission is formed. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. As the magnesium has small heat capacity, variation of the temperature of the mold during the cooling and heating cycle can be suppressed. Moreover, as the magnesium melted liquid has no reactivity with respect to the casting mold, the convex portion is not deteriorated. This allows employment of a mold having a thinner convex portion formed thereon, and therefore formation of a valve body having a narrower channel groove.Type: GrantFiled: May 12, 2005Date of Patent: December 21, 2010Assignee: Toyota Jidosha Kabushiki KaishaInventors: Toshihiro Aoyama, Shinichi Itou, Akira Murakami, Tomoyasu Kitano
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Publication number: 20100255942Abstract: A hydraulic control system of continuously variable transmission includes: a first sheave pressure regulating valve (17) that regulates a line pressure (Pl), which is used for hydraulic control as a source pressure, to obtain a first sheave pressure (Pin); a fail-safe valve (19) that selects and outputs any one of the first sheave pressure (Pin) or a fail-safe hydraulic pressure (second sheave pressure Pout) that is applied to a drive pulley (21) at the time of a failure due to an excessive first sheave pressure (Pin) to the drive pulley (21); and a first regulator valve (12) and a second regulator valve (13) that regulate the line pressure (Pl). An output pressure (Psf) of the fail-safe valve (19) is supplied to the first and second regulator valves (12 and 13) in a feedback manner as a drive pulley (21) side hydraulic pressure to thereby regulate the line pressure (Pl).Type: ApplicationFiled: December 23, 2008Publication date: October 7, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yusuke Ogata, Toshihiro Aoyama
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Publication number: 20100255941Abstract: A hydraulic control system of continuously variable transmission includes: a first sheave pressure regulating valve (17) that regulates a line pressure (Pl), which is used for hydraulic control as a source pressure, to obtain a first sheave pressure (Pin); a fail-safe valve (19) that selects and outputs any one of the first sheave pressure (Pin) or a fail-safe hydraulic pressure (second sheave pressure Pout) that is applied to a drive pulley (21) at the time of a failure due to an excessive first sheave pressure (Pin) to the drive pulley (21); and an orifice (25) that is provided in an oil passage (24) between the fail-safe valve (19) and the drive pulley (21). Then, a hydraulic pressure in the oil passage (24) on the drive pulley (21) side of the orifice (25) is supplied to the first sheave pressure regulating valve (17) as a feedback pressure.Type: ApplicationFiled: December 23, 2008Publication date: October 7, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yusuke Ogata, Toshihiro Aoyama
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Publication number: 20100184544Abstract: In a hydraulic control system for a transmission, line pressure Pl is adjusted in accordance with a second solenoid pressure Psls if the ratio of a first sheave pressure Pin with respect to a second solenoid pressure Psls is equal to or less than the gain ?. If not so, the line pressure Pl is adjusted in accordance with the first sheave pressure Pin. Consequently, the gain ? of the first sheave pressure Pin with respect to a first solenoid pressure Pslp at a first sheave pressure adjustment valve 16 and the gain ? of a second sheave pressure Pout with respect to the second solenoid pressure Psls at a second sheave pressure adjustment valve 17 can be individually set while the line pressure Pl can be suppressed to the substantially requisite minimum in the entire control region.Type: ApplicationFiled: August 25, 2008Publication date: July 22, 2010Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yusuke Ogata, Ryoji Habuchi, Toshihiro Aoyama
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Publication number: 20090266429Abstract: A hydraulic pressure control apparatus includes a primary regulator valve that regulates a pressure discharged from an oil pump to form a line pressure that is used as an original pressure for a hydraulic pressure that is supplied to each element, and a secondary regulator valve that regulates a hydraulic pressure downstream of the primary regulator valve to form a secondary pressure. Two pilot pressures (first modulator hydraulic pressure, control hydraulic pressure from a duty solenoid) are supplied to the secondary regulator valve. The secondary regulator valve is configured in such a manner that when one of the pilot pressures changes, a change in the one of the pilot pressures is absorbed by the other pilot pressure.Type: ApplicationFiled: April 24, 2009Publication date: October 29, 2009Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yusuke Ogata, Toshihiro Aoyama
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Publication number: 20080061262Abstract: By pouring, by means of pressure, melted liquid of magnesium or magnesium alloy into a hollow portion which is formed using a casting mold, a valve body where a channel groove for hydraulic oil for use in a speed change operation of the automatic transmission is formed. In the above, the channel grove for the hydraulic oil is formed due to a convex portion which is formed on the mold so as to project into the hollow portion. As the magnesium has small heat capacity, variation of the temperature of the mold during the cooling and heating cycle can be suppressed. Moreover, as the magnesium melted liquid has no reactivity with respect to the casting mold, the convex portion is not deteriorated. This allows employment of a mold having a thinner convex portion formed thereon, and therefore formation of a valve body having a narrower channel groove.Type: ApplicationFiled: May 12, 2005Publication date: March 13, 2008Inventors: Toshihiro Aoyama, Shinichi Itou, Akira Murakami, Tomoyasu Kitano
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Publication number: 20070243074Abstract: A hydraulic control unit (18), for a power transmission system having an oil receiving device (26,37), which controls a power transmitting condition of the power transmission system, and an oil reserving device for feeding the oil to the oil receiving device, wherein the oil reserving device comprises a piston (59) in which a diametrically large portion and a diametrically small portion are arranged integrally and coaxially, a first hydraulic chamber (57) in which the diametrically large portion, and a second hydraulic chamber (58) in which the diametrically small portion are housed liquid-tightly and movably back and forth; and an oil feeding amount control device for feeding the oil of the first hydraulic chamber to the oil receiving device, by raising the oil pressure in the second hydraulic chamber (58) to operate the piston (59).Type: ApplicationFiled: June 9, 2005Publication date: October 18, 2007Applicant: Toyota Jidosha Kabushiki KaishaInventors: Akira Murakami, Makoto Funahashi, Shinichi Ito, Toshihiro Aoyama, Michio Yoshida, Ryuji Ibaraki, Takashi Kuwabara, Toshiya Yamashita
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Patent number: 6250777Abstract: A double-focus lens is disclosed in which double-focus lens cuts (for example, cuts in which elements of the lens cuts formed on one of the surfaces of the lens include convex cuts in a first direction and concave cuts in the direction substantially perpendicular to the first direction) are formed on at least a portion of the lens. A vehicular lamp device can be constructed using the double-focus lens as an outer lens. Accordingly, a vehicular lamp device with a feeling of three-dimensional depth can be realized by using a lens that forms focal points in two locations, i.e., oil the front side of the lens and on the back side of the lens, without sacrificing light distribution characteristics.Type: GrantFiled: September 17, 1999Date of Patent: June 26, 2001Assignee: Stanley Electric Co., Ltd.Inventor: Toshihiro Aoyama
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Patent number: 4826892Abstract: A new polycarbosilastyrene copolymer which comprises recurring carbosilane units of the formula I: ##STR1## and recurring silastyrene units of the formula II: ##STR2## and having easy shaping and sintering properties, is produced by ultra-violet ray treatment and/or heat treatment of a polysilastyrene material and is useful for producing a shaped sintered silicon carbide article by shaping the polycarbosilastyrene copolymer to a desired form, by applying an ultra-violet ray treatment or heat treatment to the shaped article, and by sintering the resultant corss-linked, non-fusible shaped article at an elevated temperature.Type: GrantFiled: April 30, 1987Date of Patent: May 2, 1989Assignee: Teijin LimitedInventors: Keizo Shimada, Toshihiro Aoyama, Hidetsugu Yoshida
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Patent number: 4743411Abstract: A polycarbosilastyrene copolymer which comprises recurring carbosilane units of the formula I: ##STR1## and recurring silastyrene units of the formula II: ##STR2## is useful for producing a shaped sintered silicon carbide article by shaping the polycarbosilastyrene copolymer to a desired form, by applying an ultra-violet ray treatment or heat treatment to the shaped article, and by sintering the resultant cross-linked, non-fusible shaped article at an elevated temperature.Type: GrantFiled: August 12, 1986Date of Patent: May 10, 1988Assignee: Teijin LimitedInventors: Keizo Shimada, Toshihiro Aoyama, Hidetsugu Yoshida
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Patent number: 3954840Abstract: A novel 1,3,5,7-naphthalenetetracarboxylic acid, an alkali salt thereof, or an ester thereof, and a novel process for preparation thereof, and method of effective purification thereof.Type: GrantFiled: February 11, 1974Date of Patent: May 4, 1976Assignee: Teijin Ltd.Inventors: Gentaro Yamashita, Yasushi Tsuru, Kiyoshi Yamamoto, Moriharu Yamamoto, Nobuo Sakaiya, Toshihiro Aoyama, Tadao Komoriya