Patents by Inventor Masao Teraoka
Masao Teraoka 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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Publication number: 20060073931Abstract: The invention can reduce a number of parts, make an assembly and a part management easy and make a setting of an interval in an axial direction easy. A coupling apparatus is constructed by a lock ring which is rotationally engaged with a side gear corresponding to one of a differential case and a side gear capable of relatively rotating with each other by a coupling portion, is movable in an axial direction and has engagement teeth capable of engaging and interrupting with engagement teeth of the differential case on the basis of the axial movement, and an electromagnet which executes a movement in an axial direction of the lock ring on the basis of a line of magnetic force passing through the engagement teeth.Type: ApplicationFiled: September 29, 2005Publication date: April 6, 2006Inventor: Masao Teraoka
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Publication number: 20060052207Abstract: The invention provides a differential unit which can be arranged in compact as a whole, while a differential limit and a differential lock are appropriately executed. The differential unit is provided with a differential mechanism transmitting from a differential case (45) to a pair of axle shafts a rotational force while allowing a differential rotation, and is provided with a differential limiting mechanism (57) which can limit the differential rotation, and a differential lock mechanism (59) which can lock up the differential rotation. The differential limiting mechanism (57) is provided with a limiting actuator (63) for operation, the differential lock mechanism (59) is provided with a lock actuator (67) for operation, and the limiting actuator (63) and the lock actuator (67) are independently arranged in both sides of the differential case (45).Type: ApplicationFiled: September 6, 2005Publication date: March 9, 2006Inventor: Masao Teraoka
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Patent number: 6966863Abstract: An actuator 1 is disclosed including a stationary member 15, a rotational member 17 disposed for rotating capability with respect to the stationary member 15, a movable member 19 disposed for movements with respect to the rotational member 17, a drive power source 25 rotating the rotational member 17, and a converting mechanism disposed between the rotational member 17 and the movable member 19 to convert rotation of the rotational member to an operating force for an operative unit.Type: GrantFiled: March 25, 2003Date of Patent: November 22, 2005Assignee: Tochigi Fuji Sangyo Kabushiki KaishaInventors: Masao Teraoka, Noriyuki Sudou, Giichirou Takahashi, Masaaki Fusegi, Masashi Aikawa, Tetsushi Tomita
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Patent number: 6959799Abstract: An actuator for engagement and disengagement operation of a power transmission device is provided with a first plate being fixed, a second plate being movable in a direction of the engagement and disengagement operation so as to be engaged with the first plate, a third plate disposed opposite to the second plate with respect to the first plate, the third plate being rotatably engaged with the second plate, a drive unit engageable with the third plate so as to rotate the third plate, a cam mechanism converting a rotation of the third plate to a movement of the second plate in the direction of the engagement and disengagement operation and a retaining device restricting a relative rotation range of the third plate with respect to the drive unit. The second plate moved by the cam mechanism drives the power transmission device in the direction of the engagement and disengagement operation so as to intermit a power transmission thereof.Type: GrantFiled: August 5, 2003Date of Patent: November 1, 2005Assignee: Tochigi Fuji Sangyo Kabushiki KaishaInventors: Masaaki Fusegi, Masashi Aikawa, Masao Teraoka, Tetsushi Tomita, Noriyuki Sudou
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Publication number: 20050187058Abstract: A rotatively driving apparatus includes: a differential rotation amplification mechanism for amplifying differential rotation between a rotating shaft and a drive pinion shaft which are relatively rotatable; a rotor interlockingly rotatable with a amplified differential rotation amplified; and a rotation controlling mechanism for controlling the rotation of the rotor. The rotation controlling mechanism includes a stator for constituting an electric motor together with the rotor, a variable resistor for absorbing electric energy generated by the electric motor by the rotation of the rotor, and a controller for controlling torque transmitted between the rotating shaft and the drive pinion shaft by adjusting the energy absorbed by the variable resistor. The differential rotation amplification mechanism and the rotor are disposed on an identical axis.Type: ApplicationFiled: February 25, 2005Publication date: August 25, 2005Applicant: Tochigi Fuji Sangyo Kabushiki KaishaInventor: Masao Teraoka
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Publication number: 20050107200Abstract: In order to make it possible to shorten an entire length, a torque transmission coupling is provided with a rotating shaft (11) and a drive pinion shaft (17) for carrying out input and output transmission of a torque, and a torque control means (125) arranged between the rotating shaft (11) and the drive pinion shaft (17) and controlling a torque transmission between the rotating shaft (11) and the drive pinion shaft (17) on the basis of a frictional engagement caused by an electromagnetic force of an electromagnet (133), and at least a part of the torque control means (125) is arranged in an outer periphery of a taper roller bearing (117) rotatably supporting the drive pinion shaft (17).Type: ApplicationFiled: September 29, 2004Publication date: May 19, 2005Inventors: Nobushi Yamazaki, Masao Teraoka, Isao Hirota, Naoshi Mogami
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Publication number: 20050040002Abstract: In a clutch unit, an engagement of a dog clutch can be restricted until a revolution of an input shaft and the revolution of an output shaft correspond to each other so as to be suitable for the engagement. The engagement can be effected when the revolution of the input shaft and the revolution of the output shaft have corresponded so as to be suitable for the engagement. Accordingly, the revolution of the input shaft and the revolution of the output shaft are speedily synchronized, and engagement shocks of the dog clutch can be accurately suppressed. Hence, it is possible to reliably transmit the torque to be transmitted from the driving source to the wheel side through the reduction mechanism.Type: ApplicationFiled: August 13, 2004Publication date: February 24, 2005Inventor: Masao Teraoka
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Publication number: 20050006164Abstract: A reduction-drive device has a first and a second reduction mechanism and distribution device. The first reduction mechanism has a planetary carrier, a planetary gear rotatably supported by the planetary carrier, an internal gear in mesh with the planetary gear and a sun gear. The first reduction mechanism is supported by the housing so as to reduce driving force of the electric motor. The second reduction mechanism is positioned between the electric motor and the first reduction mechanism so as to reduce an output of the first reduction mechanism. The differential device is supported by the housing so as to distribute the output of the second reduction mechanism to a wheel side.Type: ApplicationFiled: July 8, 2004Publication date: January 13, 2005Inventor: Masao Teraoka
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Patent number: 6837821Abstract: The differential includes a differential casing configured to be rotatably driven by a motor under a driving force. The differential includes a differential mechanism which includes a pair of first and second side-gears for distributing a torque of the differential casing to first and second output shafts. The differential includes a frictional clutch for interconnecting the first and second output shafts. The frictional clutch includes first and second power-transmitting members connected to first and second output shafts respectively and first and second clutch plates. The first and second clutch plates are connected to the first and second power-transmitting members respectively. The differential includes an actuator for operating the frictional clutch. One output shaft of the first and second output shafts is axially displacable by the actuator under an engagement force to engage the frictional clutch.Type: GrantFiled: May 13, 2003Date of Patent: January 4, 2005Assignees: Tochigi Fuji Sangyo Kabushiki Kaisha, Honda Giken Kogyo Kabushiki KaishaInventors: Masao Teraoka, Tatsuhiro Tomari, Akihiro Iwazaki, Koji Matsubara, Yutaka Tashiro
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Publication number: 20040192487Abstract: In order to form a torque transmission coupling to be compact, the present invention provides a torque transmission coupling (1) comprising input-output rotary members (57, 59) rotatably supported to perform input-output transmission of torque; a frictional engagement section (79) provided between the input-output rotary members to perform torque transmission between the input-output rotary members by enforcing frictional engagement; a compression member set (87) that comprises a pair of members (89, 91)capable of performing relative rotation and that generates thrust through the relative rotation between the members to thereby cause the frictional engagement section to perform the frictional engagement; and a rotary actuator (121) that causes both of the members of the compression member set to perform engagement-rotational driving whereby to cause the relative rotation.Type: ApplicationFiled: March 31, 2004Publication date: September 30, 2004Applicant: TOCHIGI FUJI SANGYO KABUSHIKI KAISHAInventor: Masao Teraoka
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Patent number: 6796412Abstract: Differential apparatus which includes input and output members rotatable relative to each other, a clutch mechanism for interconnecting them, an actuator and a cam mechanism. The clutch mechanism includes first and second clutch members rotating with the input and output members, respectively. The actuator limits rotation of the second clutch member relative to the input member to angularly displace the second clutch member relative to the output member. The cam mechanism is provided between the second clutch member and the output member, and includes first and second cam faces rotating with the second clutch member and the output member, respectively. When the actuator operates, these cam faces cooperate to axially displace the second clutch member away from the output member, whereby the second clutch member is axially displaced to engage with the first clutch member.Type: GrantFiled: November 27, 2002Date of Patent: September 28, 2004Assignee: Tochigi Fuji Sangyo Kabushiki KaishaInventor: Masao Teraoka
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Patent number: 6793603Abstract: A power transmission system which includes a transmission device and a power transfer system. The transmission device includes an input shaft to which a drive force from a motor is inputted, a transmission mechanism arranged coaxially with the input shaft, and a countershaft parallel to the input shaft. The power transfer system distributes the drive force transmitted to the countershaft to front and rear wheels, and includes a sub transmission mechanism coaxially arranged in an end of the countershaft.Type: GrantFiled: October 23, 2002Date of Patent: September 21, 2004Assignees: Tochigi Fuji Sangyo Kabushiki Kaisha, JATCO Ltd.Inventors: Masao Teraoka, Masayuki Nagai
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Publication number: 20040142786Abstract: An actuator for engagement and disengagement operation of a power transmission device is provided with a first plate being fixed, a second plate being movable in a direction of the engagement and disengagement operation so as to be engaged with the first plate, a third plate disposed opposite to the second plate with respect to the first plate, the third plate being rotatably engaged with the second plate, a drive unit engageable with the third plate so as to rotate the third plate, a cam mechanism converting a rotation of the third plate to a movement of the second plate in the direction of the engagement and disengagement operation and a retaining device restricting a relative rotation range of the third plate with respect to the drive unit. The second plate moved by the cam mechanism drives the power transmission device in the direction of the engagement and disengagement operation so as to intermit a power transmission thereof.Type: ApplicationFiled: August 5, 2003Publication date: July 22, 2004Applicant: TOCHIGI FUJI SANGYO KABUSHIKI KAISHAInventors: Masaaki Fusegi, Masashi Aikawa, Masao Teraoka, Tetsushi Tomita, Noriyuki Sudou, Toshio Shiba, Katsumi Tanaka
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Patent number: 6705964Abstract: A power transmission system includes an input shaft, a toroidal CVT arranged on the input shaft, a countershaft arranged parallel with the input shaft for transferring power output from the CVT to wheels, a power distributing device for distributing power from the countershaft to the front and rear wheels, a first casing for defining a first compartment accommodating the CVT, a second casing disposed adjacent to the first casing and for defining a second compartment accommodating the power distributing device, a separation wall arranged between the first compartment and the second compartment and for sealing the compartments in a fluid-tight manner, and first and second oils charged in the first and second compartments and having different characteristics.Type: GrantFiled: December 10, 2002Date of Patent: March 16, 2004Assignees: Jatco LTD, Tochigi Fuji Sangyo Kabushiki KaishaInventors: Masayuki Nagai, Masao Teraoka
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Patent number: 6698562Abstract: A coupling for a vehicle includes a pilot clutch 15, a main clutch 13, a pressing system 21 and a coupling mechanism 17. The pilot clutch 15 generates a pilot torque and is operated by operating means 19. The main clutch 13 connects torque members 11 and 9 and transmits transmitted torque. The coupling mechanism 17 operated by the pilot torque converts the pilot torque into a pressing force for coupling the main clutch 13 via the pressing system 21 by use of a cam thrust force thereof. The main clutch 13 is disposed outside the pilot clutch 15 in a radial direction, and respective members of the pressing system 21 are mutually positioned and designed to move unitarily in a pressing direction, thus sliding portions caused by the main clutch 13 is connecting and disconnecting are limited to being on a side of the main clutch 13.Type: GrantFiled: December 21, 2001Date of Patent: March 2, 2004Assignee: Tochigi Fuji Sangyo Kabushiki KaishaInventors: Masao Teraoka, Nobushi Yamazaki, Yoshiaki Kato, Kouichi Iizuka
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Publication number: 20030232683Abstract: The differential includes a differential casing configured to rotatably drive by a motor under a driving force. The differential includes a differential mechanism which includes a pair of first and second side-gears for distributing a torque of the differential casing to first and second output shafts. The differential includes a frictional clutch for interconnecting the first and second output shafts. The frictional clutch includes a first power-transmitting member connected to a first output shaft. The frictional clutch includes a second power-transmitting member connected to a second output shaft. The frictional clutch includes first and second clutch plates axially displacable to engage with each other. A first clutch plate is connected to the first power-transmitting member. A second clutch plate is connected to the second power-transmitting member. The differential includes an actuator for operating the frictional clutch.Type: ApplicationFiled: May 13, 2003Publication date: December 18, 2003Applicants: TOCHIGI FUJI SANGYO KABUSHIKI KAISHA, HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Masao Teraoka, Tatsuhiro Tomari, Akihiro Iwazaki, Koji Matsubara, Yutaka Tashiro
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Publication number: 20030184171Abstract: An actuator 1 is disclosed including a stationary member 15, a rotational member 17 disposed for rotating capability with respect to the stationary member 15, a movable member 19 disposed for movements with respect to the rotational member 17, a drive power source 25 rotating the rotational member 17, and a converting mechanism disposed between the rotational member 17 and the movable member 19 to convert rotation of the rotational member to an operating force for an operative unit.Type: ApplicationFiled: March 25, 2003Publication date: October 2, 2003Inventors: Masao Teraoka, Noriyuki Sudou, Giichirou Takahashi, Maaaki Fusegi, Masashi Aikawa, Tetsushi Tomita
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Publication number: 20030121750Abstract: Differential apparatus which includes input and output members rotatable relative to each other, a clutch mechanism for interconnecting them, an actuator and a cam mechanism. The clutch mechanism includes first and second clutch members rotating with the input and output members, respectively. The actuator limits rotation of the second clutch member relative to the input member to angularly displace the second clutch member 1o relative to the output member. The cam mechanism is provided between the second clutch member and the output member, and includes first and second cam faces rotating with the second clutch member and the output member, respectively. When the actuator operates, these cam faces cooperate to axially displace the second clutch member away from the output member, whereby the second clutch member is axially displaced to engage with the first clutch member.Type: ApplicationFiled: November 27, 2002Publication date: July 3, 2003Applicant: TOCHIGI FUJI SANGYO KABUSHIKI KAISHAInventor: Masao Teraoka
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Publication number: 20030106734Abstract: A power transmission system includes an input shaft, a toroidal CVT arranged on the input shaft, a countershaft arranged parallel with the input shaft for transferring power output from the CVT to wheels, a power distributing device for distributing power from the countershaft to the front and rear wheels, a first casing for defining a first compartment accommodating the CVT, a second casing disposed adjacent to the first casing and for defining a second compartment accommodating the power distributing device, a separation wall arranged between the first compartment and the second compartment and for sealing the compartments in a fluid-tight manner, and first and second oils charged in the first and second compartments and having different characteristics.Type: ApplicationFiled: December 10, 2002Publication date: June 12, 2003Applicant: JATCO LtdInventors: Masayuki Nagai, Masao Teraoka
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Publication number: 20030109349Abstract: A power transmission system which includes a transmission device and a power transfer system. The transmission device includes an input shaft to which a drive force from a motor is inputted, a transmission mechanism arranged coaxially with the input shaft, and a countershaft parallel to the input shaft. The power transfer system distributes the drive force transmitted to the countershaft to front and rear wheels, and includes a sub transmission mechanism coaxially arranged in an end of the countershaft.Type: ApplicationFiled: October 23, 2002Publication date: June 12, 2003Applicants: TOCHIGI FUJI SANGYO KABUSHIKI KAISHA, JATCO Ltd.Inventors: Masao Teraoka, Masayuki Nagai