Patents by Inventor Akio Sakaguchi
Akio Sakaguchi 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: 7914382Abstract: A dual type constant velocity universal joint solves the problems of greasing work efficiency and lubricating ability of a double Cardan Joint. The dual type constant velocity universal joint includes two constant velocity universal joints. Each constant velocity universal joint includes: a cylindrical outer ring in which a plurality of guiding grooves that extend in an axial direction are formed on a spherical inner circumferential surface; an inner ring in which a plurality of guiding grooves that extend in an axial direction are formed on a spherical outer circumferential surface; balls for torque transmission each of which is disposed in each of a plurality of ball tracks which are through coordination between the guiding grooves of the outer ring and the guiding grooves of the inner ring; and a cage 5 for holding the balls.Type: GrantFiled: October 20, 2006Date of Patent: March 29, 2011Assignee: NTN CorporationInventors: Akio Sakaguchi, Kousei Kuriki
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Publication number: 20090298599Abstract: The present invention intends to solve the problems of greasing work efficiency and lubricating ability of a double Cardan joint by forming a dual type of a constant velocity universal joint. The dual type constant velocity universal joint of the present invention includes two constant velocity universal joints. Each constant velocity universal joint includes: a cylindrical outer ring 1 in which a plurality of guiding grooves 1b that extend in an axial direction are formed on a spherical inner circumferential surface; an inner ring 2 in which a plurality of guiding grooves 2b that extend in an axial direction are formed on a spherical outer circumferential surface; balls 4 for torque transmission each of which is disposed in each of a plurality of ball tracks which are through coordination between the guiding grooves 1b of the outer ring 1 and the guiding grooves 2b of the inner ring 2; and a cage 5 for holding the balls 4.Type: ApplicationFiled: October 20, 2006Publication date: December 3, 2009Inventors: Akio Sakaguchi, Kousei Kuriki
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Patent number: 7591729Abstract: A double constant velocity universal joint includes two constant velocity universal joints, each having a cylindrical outer joint member with a plurality of axially extending guide grooves in a spherical inner circumferential surface thereof, an inner joint member with a plurality of axially extending guide grooves formed in a spherical outer circumferential surface, torque transmitting balls each arranged in the ball tracks formed by both guide grooves of the outer joint member and the inner joint member, and a retainer for retaining the balls. The outer joint members are coaxially united back to back, and a cover member having an inner spherical surface that makes sliding contact with the outer circumferential surface of the outer joint member is attached to a shaft that is connected to the inner joint member.Type: GrantFiled: September 15, 2006Date of Patent: September 22, 2009Assignee: NTN CorporationInventors: Akio Sakaguchi, Yasuaki Takekawa
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Publication number: 20080272995Abstract: [Summary] [Object] It is an object of the present invention to provide a portable information terminal device and a display device capable of effectively suppressing a display screen from being peeped from an oblique direction. [Means for Settlement] A first pattern area and a second pattern area are formed in a display area of a display device 5; in a wide viewing field mode, the whole of the display area is brought into a wide viewing angle state; and in a narrow viewing field mode, a first divided state in which the display area except the first pattern area is brought into a narrow viewing angle state, and a second divided state in which the display area except the second pattern area is brought into the narrow viewing angle state are dynamically switched.Type: ApplicationFiled: March 28, 2006Publication date: November 6, 2008Applicant: Sharp Kabushiki KaishaInventors: Akio Sakaguchi, Yasuyuki Taniguchi, Keiji Inoue
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Publication number: 20070066407Abstract: The present invention solves the problems of poor greasing efficiency and lubrication of double Cardan joints by providing a double constant velocity universal joint formed with two constant velocity universal joints combined. The double constant velocity universal joint includes two constant velocity universal joints, each having a cylindrical outer joint member with a plurality of axially extending guide grooves in a spherical inner circumferential surface thereof, an inner joint member with a plurality of axially extending guide grooves formed in a spherical outer circumferential surface, torque transmitting balls each arranged in the ball tracks formed by both guide grooves of the outer joint member and the inner joint member, and a retainer for retaining the balls.Type: ApplicationFiled: September 15, 2006Publication date: March 22, 2007Inventors: Akio Sakaguchi, Yasuaki Takekawa
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Patent number: 7052400Abstract: An annular support ring 32 is fitted onto the outer periphery of each trunnion 22. This support ring 32 and the roller 34 are unitized via a plurality of needle rollers 36 to constitute a roller assembly capable of relative rotations therebetween. In longitudinal section, each trunnion 22 has an outer periphery of straight shape, parallel to the axis of the trunnion 22. In cross section, the trunnion 22 has a generally ellipse shape with the major axis orthogonal to the axis of the joint. The inner periphery of each support ring 32 is arcuate and convex in section. This combines with the general elliptic cross sections of the trunnions 22 and the provision of predetermined clearances between the trunnions 22 and the support rings 32, to allow the support rings 32 to move along the axial directions of the trunnions 22 as well as make tilting movements with respect to the trunnions 22.Type: GrantFiled: January 28, 2004Date of Patent: May 30, 2006Assignee: NTN CorporationInventors: Hisaaki Kura, Kenji Terada, Tatsuhiro Goto, Akio Sakaguchi, Shigeyoshi Ishiguro, Kazuhiko Yoshida, Tatsuro Sugiyama
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Patent number: 7011451Abstract: A wheel bearing assembly is provided which has a rotating speed sensor unit which includes a seal for preventing entry of foreign matter and which takes up little space and thus can be mounted on the wheel bearing assembly without increasing the axial dimension of the fixed member of the wheel bearing assembly. The assembly includes a fixed member fixed to a vehicle body, and a rotary member rotatably supported in the stationary member through a bearing and mounted to a vehicle wheel. An annular sensor is fitted to a knuckle, which is a part of the fixed member, on the inboard side of the bearing. A sensor seal is fitted to the annular sensor and has a seal lip kept in slide contact with a seal land formed on a constant-velocity joint outer ring, which is a part of the rotary member, to define a sealed space on the inboard side of the bearing. An encoder is mounted on a bearing inner ring, which is a part of the rotary member, in the sealed space.Type: GrantFiled: April 21, 2003Date of Patent: March 14, 2006Assignee: NTN CorporationInventors: Eiji Tajima, Hisashi Ohtsuki, Akio Sakaguchi, Koji Kametaka
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Patent number: 6913540Abstract: A constant velocity universal joint for use with a propeller shaft which reduces its weight and size as well as facilitates assembling a stub shaft, thereby reducing the number of parts used and improving rotational balance. The universal joint, comprising: an outer ring with a cup-shaped enlarged diameter portion having track grooves formed on an inner peripheral surface and with a hollow reduced diameter portion integrated with the enlarged diameter portion; an inner ring having track grooves formed on an outer peripheral surface; balls, interposed between the track grooves of the inner and outer rings, for transmitting torque; a cage, accommodated in an annular space between the inner and outer rings, for holding the balls.Type: GrantFiled: May 3, 2002Date of Patent: July 5, 2005Assignee: NTN CorporationInventors: Michio Iihara, Yoshihiro Sagisaka, Masazumi Kobayashi, Akio Sakaguchi, Ryuma Mano, Kikuo Maeda
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Publication number: 20040209693Abstract: An annular support ring 32 is fitted onto the outer periphery of each trunnion 22. This support ring 32 and the roller 34 are unitized via a plurality of needle rollers 36 to constitute a roller assembly capable of relative rotations therebetween. In longitudinal section, each trunnion 22 has an outer periphery of straight shape, parallel to the axis of the trunnion 22. In cross section, the trunnion 22 has a generally ellipse shape with the major axis orthogonal to the axis of the joint. The inner periphery of each support ring 32 is arcuate and convex in section. This combines with the general elliptic cross sections of the trunnions 22 and the provision of predetermined clearances between the trunnions 22 and the support rings 32, to allow the support rings 32 to move along the axial directions of the trunnions 22 as well as make tilting movements with respect to the trunnions 22.Type: ApplicationFiled: January 28, 2004Publication date: October 21, 2004Applicant: NTN CORPORATIONInventors: Hisaaki Kura, Kenji Terada, Tatsuhiro Goto, Akio Sakaguchi, Shigeyoshi Ishiguro, Kazuhiko Yoshida, Tatsuro Sugiyama
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Patent number: 6719635Abstract: An annular support ring 32 is fitted onto the outer periphery of each trunnion 22. This support ring 32 and the roller 34 are unitized via a plurality of needle rollers 36 to constitute a roller assembly capable of relative rotations therebetween. In longitudinal section, each trunnion 22 has an outer periphery of straight shape, parallel to the axis of the trunnion 22. In cross section, the trunnion 22 has a generally ellipse shape with the major axis orthogonal to the axis of the joint. The inner periphery of each support ring 32 is arcuate and convex in section. This combines with the general elliptic cross sections of the trunnions 22 and the provision of predetermined clearances between the trunnions 22 and the support rings 32, to allow the support rings 32 to move along the axial directions of the trunnions 22 as well as make tilting movements with respect to the trunnions 22.Type: GrantFiled: July 19, 2002Date of Patent: April 13, 2004Assignee: NTN CorporationInventors: Hisaaki Kura, Kenji Terada, Tatsuhiro Goto, Akio Sakaguchi, Shigeyoshi Ishiguro, Kazuhiko Yoshida, Tatsuro Sugiyama
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Patent number: 6644858Abstract: A wheel bearing device comprises a rotor having a double row of raceway surfaces and having a wheel fixed thereto, an outer ring having a double row of raceway surfaces and a flange to be fixed to a knuckle disposed on the car body side, and a double row of rolling bodies interposed between the respective raceway surfaces of the rotor and outer ring. A pulser ring is disposed between the double row of raceway surfaces of the rotor, and a sensor opposed to the pulser ring is held by a holding member held between the flange of the outer ring and the knuckle, whereby the sensor can be disposed in the bearing inner space.Type: GrantFiled: May 2, 2002Date of Patent: November 11, 2003Assignee: NTN CorporationInventors: Akira Torii, Shigeaki Fukushima, Akio Sakaguchi
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Publication number: 20030202723Abstract: A wheel bearing assembly is provided which has a rotating speed sensor unit which includes a seal for preventing entry of foreign matter and which takes up little space and thus can be mounted on the wheel bearing assembly without increasing the axial dimension of the fixed member of the wheel bearing assembly. The assembly includes a fixed member fixed to a vehicle body, and a rotary member rotatably supported in the stationary member through a bearing and mounted to a vehicle wheel. An annular sensor is fitted to a knuckle, which is a part of the fixed member, on the inboard side of the bearing. A sensor seal is fitted to the annular sensor and has a seal lip kept in slide contact with a seal land formed on a constant-velocity joint outer ring, which is a part of the rotary member, to define a sealed space on the inboard side of the bearing. An encoder is mounted on a bearing inner ring, which is a part of the rotary member, in the sealed space.Type: ApplicationFiled: April 21, 2003Publication date: October 30, 2003Inventors: Eiji Tajima, Hisashi Ohtsuki, Akio Sakaguchi, Koji Kametaka
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Publication number: 20030130045Abstract: An annular support ring 32 is fitted onto the outer periphery of each trunnion 22. This support ring 32 and the roller 34 are unitized via a plurality of needle rollers 36 to constitute a roller assembly capable of relative rotations therebetween. In longitudinal section, each trunnion 22 has an outer periphery of straight shape, parallel to the axis of the trunnion 22. In cross section, the trunnion 22 has a generally ellipse shape with the major axis orthogonal to the axis of the joint. The inner periphery of each support ring 32 is arcuate and convex in section. This combines with the general elliptic cross sections of the trunnions 22 and the provision of predetermined clearances between the trunnions 22 and the support rings 32, to allow the support rings 32 to move along the axial directions of the trunnions 22 as well as make tilting movements with respect to the trunnions 22.Type: ApplicationFiled: July 19, 2002Publication date: July 10, 2003Applicant: NTN CORPORATIONInventors: Hisaaki Kura, Kenji Terada, Tatsuhiro Goto, Akio Sakaguchi, Shigeyoshi Ishiguro, Kazuhiko Yoshida, Tatsuro Sugiyama
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Patent number: 6579188Abstract: An annular support ring 32 is fitted onto the outer periphery of each trunnion 22. This support ring 32 and the roller 34 are unitized via a plurality of needle rollers 36 to constitute a roller assembly capable of relative rotations therebetween. In longitudinal section, each trunnion 22 has an outer periphery of straight shape, parallel to the axis of the trunnion 22. In cross section, the trunnion 22 has a generally ellipse shape with the major axis orthogonal to the axis of the joint. The inner periphery of each support ring 32 is arcuate and convex in section. This combines with the general elliptic cross sections of the trunnions 22 and the provision of predetermined clearances between the trunnions 22 and the support rings 32, to allow the support rings 32 to move along the axial directions of the trunnions 22 as well as make tilting movements with respect to the trunnions 22.Type: GrantFiled: July 19, 2002Date of Patent: June 17, 2003Assignee: NTN CorporationInventors: Hisaaki Kura, Kenji Terada, Tatsuhiro Goto, Akio Sakaguchi, Shigeyoshi Ishiguro, Kazuhiko Yoshida, Tatsuro Sugiyama
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Patent number: 6573705Abstract: A wheel bearing assembly is provided which has a rotating speed sensor unit which includes a seal for preventing entry of foreign matter and which takes up little space and thus can be mounted on the wheel bearing assembly without increasing the axial dimension of the fixed member of the wheel bearing assembly. The assembly includes a fixed member fixed to a vehicle body, and a rotary member rotatably supported in the stationary member through a bearing and mounted to a vehicle wheel. An annular sensor is fitted to a knuckle, which is a part of the fixed member, on the inboard side of the bearing. A sensor seal is fitted to the annular sensor and has a seal lip kept in slide contact with a seal land formed on a constant-velocity joint outer ring, which is a part of the rotary member, to define a sealed space on the inboard side of the bearing. An encoder is mounted on a bearing inner ring, which is a part of the rotary member, in the sealed space.Type: GrantFiled: September 7, 2000Date of Patent: June 3, 2003Assignee: NTN CorporationInventors: Eiji Tajima, Hisashi Ohtsuki, Akio Sakaguchi, Koji Kametaka
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Publication number: 20020187841Abstract: A constant velocity universal joint for use with a propeller shaft which reduces its weight and size as well as facilitates assembling a stub shaft, thereby reducing the number of parts used and improving rotational balance. The universal joint, comprising: an outer ring with a cup-shaped enlarged diameter portion having track grooves formed on an inner peripheral surface and with a hollow reduced diameter portion integrated with the enlarged diameter portion; an inner ring having track grooves formed on an outer peripheral surface; balls, interposed between the track grooves of the inner and outer rings, for transmitting torque; a cage, accommodated in an annular space between the inner and outer rings, for holding the balls.Type: ApplicationFiled: May 3, 2002Publication date: December 12, 2002Inventors: Michio Iihara, Yoshihiro Sagisaka, Masazumi Kobayashi, Akio Sakaguchi, Ryuma Mano, Kikuo Maeda
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Patent number: 6478682Abstract: An annular support ring 32 is fitted onto the outer periphery of each trunnion 22. This support ring 32 and the roller 34 are unitized via a plurality of needle rollers 36 to constitute a roller assembly capable of relative rotations therebetween. In longitudinal section, each trunnion 22 has an outer periphery of straight shape, parallel to the axis of the trunnion 22. In cross section, the trunnion 22 has a generally ellipse shape with the major axis orthogonal to the axis of the joint. The inner periphery of each support ring 32 is arcuate and convex in section. This combines with the general elliptic cross sections of the trunnions 22 and the provision of predetermined clearances between the trunnions 22 and the support rings 32, to allow the support rings 32 to move along the axial directions of the trunnions 22 as well as make tilting movements with respect to the trunnions 22.Type: GrantFiled: October 30, 2000Date of Patent: November 12, 2002Assignee: NTN CorporationInventors: Hisaaki Kura, Kenji Terada, Tatsuhiro Goto, Akio Sakaguchi, Shigeyoshi Ishiguro, Kazuhiko Yoshida, Tatsuro Sugiyama
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Publication number: 20020118899Abstract: A wheel bearing device comprises a rotor having a double row of raceway surfaces and having a wheel fixed thereto, an outer ring having a double row of raceway surfaces and a flange to be fixed to a knuckle disposed on the car body side, and a double row of rolling bodies interposed between the respective raceway surfaces of the rotor and outer ring. A pulser ring is disposed between the double row of raceway surfaces of the rotor, and a sensor opposed to the pulser ring is held by a holding member held between the flange of the outer ring and the knuckle, whereby the sensor can be disposed in the bearing inner space.Type: ApplicationFiled: May 2, 2002Publication date: August 29, 2002Applicant: NTN CORPORATIONInventors: Akira Torii, Shigeaki Fukushima, Akio Sakaguchi
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Patent number: 6406186Abstract: A wheel bearing device comprises a rotor having a double row of raceway surfaces and having a wheel fixed thereto, an outer ring having a double row of raceway surfaces and a flange to be fixed to a knuckle disposed on the car body side, and a double row of rolling bodies interposed between the respective raceway surfaces of the rotor and outer ring. A pulser ring is disposed between the double row of raceway surfaces of the rotor, and a sensor opposed to the pulser ring is held by a holding member held between the flange of the outer ring and the knuckle, whereby the sensor can be disposed in the bearing inner space.Type: GrantFiled: September 8, 2000Date of Patent: June 18, 2002Assignee: NTN CorporationInventors: Akira Torii, Shigeaki Fukushima, Akio Sakaguchi
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Patent number: 6322453Abstract: A perpendicular distance (PCR1) between a centerline (L1) including the center (O3) of the outer circumference surface (4b) of an outer roller (4), orthogonal to axis Z of a trunnion (2a) and a joint center O is shifted by &Dgr;h (=PCR1−PCR2) from a perpendicular distance (PCR2) between a centerline (L2) including the center (O1) of the outer circumference surface (3b) of an inner roller (3), orthogonal to axis Z of a trunnion (2a) and a joint center O. Under the most favorable conditions, PCR2 is shifted by an optimal amount of &Dgr;H from PCR1 toward the proximal end of the trunnion, and the position of contact (S) between the inner circumference surface (4a) of the outer roller 4 and the outer circumference surface (3b) of the inner roller (3) is located on the centerline (L1) (on PCR1) of the outer circumference surface (4b) of the outer roller (4).Type: GrantFiled: November 1, 1999Date of Patent: November 27, 2001Assignee: NTN CorporationInventors: Shigeyoshi Ishiguro, Kenji Terada, Yoshimasa Ushioda, Akio Sakaguchi, Hisaaki Kura, Katsuhiro Suzuki, Masaru Komatsu