Patents by Inventor Naoji Sakamoto
Naoji Sakamoto 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: 7972234Abstract: String vibration is reduced without causing friction loss. A silent chain is comprised of a multiple number of link plates, each of which has a pair of tooth portions and pin holes and which are laminated laterally and longitudinally and guide plates which are arranged at outermost positions of the link plates. The link plates and the guide plates are connected by connecting pins. In this construction, some of the guide plates are made heavier than that of other guide plates and are irregularly mixed in a longitudinal direction of the chain. Thus, the natural frequency can be changed in an arbitrary chain span and string vibration may be reduced without causing friction loss.Type: GrantFiled: April 29, 2010Date of Patent: July 5, 2011Assignee: BorgWarner Inc.Inventor: Naoji Sakamoto
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Publication number: 20100216582Abstract: String vibration is reduced without causing friction loss. A silent chain is comprised of a multiple number of link plates, each of which has a pair of tooth portions and pin holes and which are laminated laterally and longitudinally and guide plates which are arranged at outermost positions of the link plates. The link plates and the guide plates are connected by connecting pins. In this construction, some of the guide plates are made heavier than that of other guide plates and are irregularly mixed in a longitudinal direction of the chain. Thus, the natural frequency can be changed in an arbitrary chain span and string vibration may be reduced without causing friction loss.Type: ApplicationFiled: April 29, 2010Publication date: August 26, 2010Applicant: BORGWARNER INC.Inventor: Naoji Sakamoto
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Publication number: 20100210387Abstract: String vibration is reduced without causing friction loss. A silent chain is comprised of a multiple number of link plates, each of which has a pair of tooth portions and pin holes and which are laminated laterally and longitudinally and guide plates which are arranged at outermost positions of the link plates. The link plates and the guide plates are connected by connecting pins. In this construction, some of the guide plates are made heavier than that of other guide plates and are irregularly mixed in a longitudinal direction of the chain. Thus, the natural frequency can be changed in an arbitrary chain span and string vibration may be reduced without causing friction loss.Type: ApplicationFiled: April 29, 2010Publication date: August 19, 2010Applicant: BorgWarner Inc.Inventor: Naoji Sakamoto
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Publication number: 20090239697Abstract: String vibration is reduced without causing friction loss. A silent chain is comprised of a multiple number of link plates, each of which has a pair of tooth portions and pin holes and which are laminated laterally and longitudinally and guide plates which are arranged at outermost positions of the link plates. The link plates and the guide plates are connected by connecting pins. In this construction, some of the guide plates are made heavier than that of other guide plates and are irregularly mixed in a longitudinal direction of the chain. Thus, the natural frequency can be changed in an arbitrary chain span and string vibration may be reduced without causing friction loss.Type: ApplicationFiled: June 3, 2009Publication date: September 24, 2009Applicant: BorgWarner Inc.Inventor: Naoji Sakamoto
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Publication number: 20070072719Abstract: String vibration is reduced without causing friction loss. A silent chain is comprised of a multiple number of link plates, each of which has a pair of tooth portions and pin holes and which are laminated laterally and longitudinally and guide plates which are arranged at outermost positions of the link plates. The link plates and the guide plates are connected by connecting pins. In this construction, some of the guide plates are made heavier than that of other guide plates and are irregularly mixed in a longitudinal direction of the chain. Thus, the natural frequency can be changed in an arbitrary chain span and string vibration may be reduced without causing friction loss.Type: ApplicationFiled: September 27, 2006Publication date: March 29, 2007Applicant: BORGWARNER INC.Inventor: Naoji Sakamoto
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Patent number: 7097580Abstract: A sprocket for preventing the partial wear on the teeth of the sprocket. The teeth of the sprocket comprised of a pair of side portions located on opposite sides of a tooth and a central portion located between the pair of sides. The pair of side portions has a hardness greater than the central portion.Type: GrantFiled: October 21, 2003Date of Patent: August 29, 2006Assignee: BorgWarner Morse TEC Japan K.K.Inventor: Naoji Sakamoto
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Patent number: 6969332Abstract: A silent chain comprises a plurality of link plates, each having a pair of tooth parts and pin holes, stacked in the thickness direction as well as in the length direction and linked together using linking pins. Guide links are provided on the outermost sides of the link plates and are press-fit to the ends of linking pins. The guide links and link plates are relatively positioned to reduce wear on a chain guide surface by causing either the guide links or the link plates to substantially contact the guide surface.Type: GrantFiled: June 5, 2001Date of Patent: November 29, 2005Assignee: Borg-Warner Automotive K.K.Inventors: Naoji Sakamoto, Hiroyuki Takeda, Akio Matsuda
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Patent number: 6902505Abstract: A blade-type tensioner for applying tension to a chain comprising a base, an arcuately shaped blade shoe having a chain sliding face, a spring provided on a back side of the blade shoe, and a guide member. The blade shoe has a proximal end portion and a distal end portion, where the proximal end portion is swingably supported on the base, and the distal end portion is slidably supported on a slide plate of the base. The slide plate is arcuately shaped to form a concavely arcuate arc face on an opposite side of the distal end portion of the blade shoe, and the distal end portion of the blade shoe has a convexly arcuate arc face corresponding to the concavely arcuate arc face of the slide plate. The distal end portion of the blade shoe is guided by a self-aligning action of the concavely arcuate arc face of the slide plate in such a way that the distal end portion is centrally positioned in a lateral direction on the slide plate.Type: GrantFiled: February 3, 2003Date of Patent: June 7, 2005Assignee: BorgWarner Morse TEC Japan K.K.Inventors: Shinichi Yonezawa, Naoji Sakamoto
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Publication number: 20040166978Abstract: The present invention provides a silent chain that can decrease noise and improve oscillation performance. A silent chain 1 includes a plurality of link plates interlaced in a thickness and length direction and guide links 4, 4′ disposed on the outside edge portions of the link plates, where the link plates and the guide links are connected by connecting pins. The guide link 4 has a yield load lower than that of the guide link 4′. These guide links 4, 4′ are located at a random pattern along the length of the chain. During operation, at the onset of the engagement with a sprocket tooth, contact with an inside flank of a link plate varies aperiodically. When the engagement proceeds and an outside flank of the link plate seats on the sprocket, seating at the sprocket tooth varies aperiodically.Type: ApplicationFiled: August 28, 2003Publication date: August 26, 2004Applicant: BorgWarner Morse TEC Japan K.K.Inventors: Akio Matsuda, Naoji Sakamoto, Yasuaki Nishimori
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Publication number: 20040116224Abstract: A sprocket for preventing the partial wear on the teeth of the sprocket. The teeth of the sprocket comprised of a pair of side portions located on opposite sides of a tooth and a central portion located between the pair of sides. The pair of side portions has a hardness greater than the central portion.Type: ApplicationFiled: October 21, 2003Publication date: June 17, 2004Applicant: BorgWarner Morse TEC Japan K.K.Inventor: Naoji Sakamoto
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Publication number: 20040005953Abstract: A blade-type tensioner for applying tension to a chain comprising a base, an arcuately shaped blade shoe having a chain sliding face, a spring provided on a back side of the blade shoe, and a guide member. The blade shoe has a proximal end portion and a distal end portion, where the proximal end portion is swingably supported on the base, and the distal end portion is slidably supported on a slide plate of the base. The distal end portion of the blade shoe is guided by a self-aligning action of the slide plate in such a way that the distal end portion is centrally positioned in a lateral direction on the slide plate.Type: ApplicationFiled: May 12, 2003Publication date: January 8, 2004Applicant: BorgWarner Morse TEC Japan K.K.Inventors: Shinichi Yonezawa, Naoji Sakamoto
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Publication number: 20030162615Abstract: A blade-type tensioner for applying tension to a chain comprising a base, an arcuately shaped blade shoe having a chain sliding face, a spring provided on a back side of the blade shoe, and a guide member. The blade shoe has a proximal end portion and a distal end portion, where the proximal end portion is swingably supported on the base, and the distal end portion is slidably supported on a slide plate of the base. The slide plate is arcuately shaped to form a concavely arcuate arc face on an opposite side of the distal end portion of the blade shoe, and the distal end portion of the blade shoe has a convexly arcuate arc face corresponding to the concavely arcuate arc face of the slide plate. The distal end portion of the blade shoe is guided by a self-aligning action of the concavely arcuate arc face of the slide plate in such a way that the distal end portion is centrally positioned in a lateral direction on the slide plate.Type: ApplicationFiled: February 3, 2003Publication date: August 28, 2003Inventors: Shinichi Yonezawa, Naoji Sakamoto
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Publication number: 20020169046Abstract: A silent chain comprises a plurality of link plates, each having a pair of tooth parts and pin holes, stacked in the thickness direction as well as in the length direction and linked together using linking pins. Guide links are provided on the outermost sides of the link plates and are press-fit to the ends of linking pins. The guide links and link plates are relatively positioned to reduce wear on a chain guide surface by causing either the guide links or the link plates to substantially contact the guide surface.Type: ApplicationFiled: June 5, 2001Publication date: November 14, 2002Inventors: Naoji Sakamoto, Hiroyuki Takeda, Akio Matsuda
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Patent number: 5700215Abstract: A hydraulic tensioner having a slidable plunger in a housing, a shaft stopper ring on the rear-end of the plunger, and a stopper screw fastened to the housing that can engage with the shaft stopper ring at the retracted position of the plunger. Packing is provided to seal a clearance between the stopper screw and the housing when the stopper screw is in its engagement position with the housing.Type: GrantFiled: July 2, 1996Date of Patent: December 23, 1997Assignee: Borg-Warner Automotive, K.K.Inventors: Naosumi Tada, Naoji Sakamoto