Patents by Inventor Shinya Okuma
Shinya Okuma 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: 8931609Abstract: The present invention provides a roller type one-way clutch comprising an outer race in which pockets provided at their inner surfaces with cam surfaces are formed, an inner race spaced apart from the outer race in a radial inner diameter side and disposed coaxially with the outer race for a relative rotational movement and having an annular outer peripheral track surface, a roller disposed within the pocket to be engaged with the cam surfaces and adapted to transmit torque between the outer race and the inner race, and an accordion spring disposed within the pocket and adapted to bias the rollers to be engaged with the cam surfaces, and wherein one end of each accordion spring is secured to an axial end face of the outer race.Type: GrantFiled: April 1, 2008Date of Patent: January 13, 2015Assignee: NSK-Warner K.K.Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
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Patent number: 8485332Abstract: The present invention provides a roller type one-way clutch comprising an outer race in which pockets provided at their inner surfaces with cam surfaces are formed, an inner race spaced apart from the outer race in a radial inner diameter side and disposed coaxially with the outer race for a relative rotational movement and having an annular outer peripheral track surface, a plurality of rollers disposed within the pockets to be engaged with the cam surfaces and adapted to transmit torque between the outer race and the inner race, a holder having a cylindrical portion and windows provided in the cylindrical portion to hold the plurality of rollers, and springs disposed within the pockets between the outer race and the inner race and adapted to bias the rollers to be engaged with the cam surfaces, and wherein the holder is rotatable relative to the outer race and biasing forces of the springs are transmitted to the holder via the rollers.Type: GrantFiled: March 25, 2008Date of Patent: July 16, 2013Assignee: NSK-Warner K.K.Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
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Patent number: 8434605Abstract: A one-way clutch of roller type comprises an outer race having pockets provided at their inner peripheries with cam surfaces, an inner race arranged in an inner diameter side of the outer race coaxially, a plurality of rollers disposed in the pockets and adapted to transmit torque between the outer race and the inner race when engaged by the cam surfaces, and accordion springs disposed in the pockets between the outer race and the rollers and having one ends secured to an axial end face of the outer race and adapted to bias the rollers toward engagement directions with respect to the cam surfaces, and the axial end face of the outer race is provided with a discriminating area to which the accordion springs are secured, and the discriminating area is capable of being discriminated from the other areas.Type: GrantFiled: June 5, 2009Date of Patent: May 7, 2013Assignee: NSK-Warner K.K.Inventors: Hirobumi Shirataki, Tomoharu Ando, Yasuhide Takasu, Shinya Okuma
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Patent number: 8413778Abstract: A one-way clutch comprising an outer race provided with a pocket and having a groove portion formed at an inner diameter side of an axial one end face of the outer race, an inner race arranged coaxially with the outer race, a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race, a cage having a cylindrical portion with a window and a flange portion extending from an axial one end face of the cylindrical portion in an outer diameter direction, a projection provided on the cylindrical portion, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate secured to abut against the axial one end face of the outer race and provided at its inner diameter portion with spline grooves, and wherein the cage is prevented from being rotated relative to the outer race by fitting the projection in the groove portion.Type: GrantFiled: November 13, 2009Date of Patent: April 9, 2013Assignee: NSK-Warner K.K.Inventors: Yasuhide Takasu, Shinya Okuma, Tomoharu Ando, Tetsuya Wakamori
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Patent number: 8397888Abstract: The present invention provides a one-way clutch comprising an outer race, an inner race, a roller adapted to transmit torque between the outer race and the inner race, a cage having a window for holding the roller, a spring disposed in the pocket and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate provided at its inner diameter portion with spline grooves into which a crankshaft of an engine is fitted, and wherein the side plate is secured to the outer race by inserting rivets into through holes provided in the outer race and through holes provided in the side plate and by caulking the rivets.Type: GrantFiled: October 27, 2009Date of Patent: March 19, 2013Assignee: NSK-Warner K.K.Inventors: Hirobumi Shirataki, Tomoharu Ando, Yasuhide Takasu, Shinya Okuma
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Patent number: 8162114Abstract: A roller-type one-way clutch includes an outer race with a pocket with a cam surface, an inner race, and a plurality of rollers disposed on the pocket, engaged in the cam surface, and transmitting torque between the outer race and the inner race. The clutch further includes a cage provided with a cylindrical part and a window provided in the cylindrical part, holding the plurality of rollers, and a spring provided on the pocket, one end of which is latched to the outer race, and the other end of which is configured for preventing movement of the rollers in the axial direction. The spring energizes the rollers in the engagement direction with the cam surface, and the cage is configured so that it is prevented from dropping off in the axial direction.Type: GrantFiled: March 17, 2008Date of Patent: April 24, 2012Assignee: NSK-Warner K.K.Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
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Patent number: 8002096Abstract: The present invention provides a one-way clutch comprising an outer race, an inner race, a roller adapted to transmit torque between the outer race and the inner race, a cage having a window for holding the roller, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface and having one end and the other end which include tab portions bent non-straightly from a main body portion, one of the tab portions being locked to an axial end face of the outer race, the other tab portion being pinched between an axial end face of the roller and a flange portion of the cage, and wherein one end of the spring is secured to the outer race and the other end is engaged by the roller, and the one end and the other end are connected to the main body portion of the spring via bent portions, and the bent portions are provided with interference preventing portions for interfering the bent portions with the outer race and theType: GrantFiled: November 13, 2009Date of Patent: August 23, 2011Assignee: NSK-Warner K.K.Inventors: Hirobumi Shirataki, Tomoharu Ando, Shinya Okuma
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Publication number: 20100314211Abstract: A roller-type one-way clutch includes an outer race with a pocket with a cam surface formed on an inner surface, an inner race separated to the radial inside diameter side with respect to the outer race, disposed concentrically and relatively rotatable, and having an annular outer peripheral raceway surface, a plurality of rollers disposed on the pocket, engaged in the cam surface, and transmitting torque between the outer race and the inner race, a cage provided with a cylindrical part and a window provided in the cylindrical part, holding the plurality of rollers, and having a circumferential width which is smaller than the roller diameter, and a spring provided on the pocket, one end of which is latched to the outer race, the other end of which has roller movement preventive means for preventing the movement of the rollers in the axial direction, and which energizes the rollers in the engagement direction with the cam surface, wherein the cage has cage movement preventive means for preventing the cage fromType: ApplicationFiled: March 17, 2008Publication date: December 16, 2010Applicant: NSK-WARNER K.K.Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
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Publication number: 20100258398Abstract: The present invention provides a roller type one-way clutch comprising an outer race in which pockets provided at their inner surfaces with cam surfaces are formed, an inner race spaced apart from the outer race in a radial inner diameter side and disposed coaxially with the outer race for a relative rotational movement and having an annular outer peripheral track surface, a roller disposed within the pocket to be engaged with the cam surfaces and adapted to transmit torque between the outer race and the inner race, and an accordion spring disposed within the pocket and adapted to bias the rollers to be engaged with the cam surfaces, and wherein one end of each accordion spring is secured to an axial end face of the outer race.Type: ApplicationFiled: April 1, 2008Publication date: October 14, 2010Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
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Publication number: 20100213021Abstract: The present invention provides a roller type one-way clutch comprising an outer race in which pockets provided at their inner surfaces with cam surfaces are formed, an inner race spaced apart from the outer race in a radial inner diameter side and disposed coaxially with the outer race for a relative rotational movement and having an annular outer peripheral track surface, a plurality of rollers disposed within the pockets to be engaged with the cam surfaces and adapted to transmit torque between the outer race and the inner race, a holder having a cylindrical portion and windows provided in the cylindrical portion to hold the plurality of rollers, and springs disposed within the pockets between the outer race and the inner race and adapted to bias the rollers to be engaged with the cam surfaces, and wherein the holder is rotatable relative to the outer race and biasing forces of the springs are transmitted to the holder via the rollers.Type: ApplicationFiled: March 25, 2008Publication date: August 26, 2010Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
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Publication number: 20100116610Abstract: The present invention provides a one-way clutch comprising an outer race provided with a pocket and having a groove portion formed at an inner diameter side of an axial one end face of the outer race, an inner race arranged coaxially with the outer race, a roller disposed in the pocket and adapted to transmit torque between the outer race and the inner race, a cage having a cylindrical portion with a window and a flange portion extending from an axial one end face of the cylindrical portion in an outer diameter direction, a projection provided on the cylindrical portion, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate secured to abut against the axial one end face of the outer race and provided at its inner diameter portion with spline grooves, and wherein the cage is prevented from being rotated relative to the outer race by fitting the projection in the groove portion.Type: ApplicationFiled: November 13, 2009Publication date: May 13, 2010Inventors: Yasuhide TAKASU, Shinya Okuma, Tomoharu Ando, Tetsuya Wakamori
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Publication number: 20100116611Abstract: The present invention provides a one-way clutch comprising an outer race, an inner race, a roller adapted to transmit torque between the outer race and the inner race, a cage having a window for holding the roller, a spring disposed in the pocket between the outer race and the roller and adapted to bias the roller toward an engagement direction with respect to the cam surface and having one end and the other end which include tab portions bent non-straightly from a main body portion, one of the tab portions being locked to an axial end face of the outer race, the other tab portion being pinched between an axial end face of the roller and a flange portion of the cage, and wherein one end of the spring is secured to the outer race and the other end is engaged by the roller, and the one end and the other end are connected to the main body portion of the spring via bent portions, and the bent portions are provided with interference preventing portions for interfering the bent portions with the outer race and theType: ApplicationFiled: November 13, 2009Publication date: May 13, 2010Inventors: Hirobumi SHIRATAKI, Tomoharu Ando, Shinya Okuma
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Publication number: 20100108455Abstract: The present invention provides a one-way clutch comprising an outer race, an inner race, a roller adapted to transmit torque between the outer race and the inner race, a cage having a window for holding the roller, a spring disposed in the pocket and adapted to bias the roller toward an engagement direction with respect to the cam surface, and a side plate provided at its inner diameter portion with spline grooves into which a crankshaft of an engine is fitted, and wherein the side plate is secured to the outer race by inserting rivets into through holes provided in the outer race and through holes provided in the side plate and by caulking the rivets.Type: ApplicationFiled: October 27, 2009Publication date: May 6, 2010Inventors: Hirobumi Shirataki, Tomoharu Ando, Yasuhide Takasu, Shinya Okuma
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Publication number: 20090301257Abstract: A one-way clutch of roller type comprises an outer race having pockets provided at their inner peripheries with cam surfaces, an inner race arranged in an inner diameter side of the outer race coaxially, a plurality of rollers disposed in the pockets and adapted to transmit torque between the outer race and the inner race when engaged by the cam surfaces, and accordion springs disposed in the pockets between the outer race and the rollers and having one ends secured to an axial end face of the outer race and adapted to bias the rollers toward engagement directions with respect to the cam surfaces, and the axial end face of the outer race is provided with a discriminating area to which the accordion springs are secured, and the discriminating area is capable of being discriminated from the other areas.Type: ApplicationFiled: June 5, 2009Publication date: December 10, 2009Inventors: Hirobumi SHIRATAKI, Tomoharu Ando, Yasuhide Takasu, Shinya Okuma
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Publication number: 20060249328Abstract: An object of the present invention is to design miniaturization of a muffler as performance of the muffler is maintained and to exhibit appropriate gas-exhausting characteristics in accordance with traveling condition of a vehicle.Type: ApplicationFiled: December 25, 2003Publication date: November 9, 2006Inventors: Hiroyuki Ichikawa, Sumito Mochizuki, Takumi Okano, Shinya Okuma
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Patent number: D582450Type: GrantFiled: June 23, 2008Date of Patent: December 9, 2008Assignee: NSK-Warner K.K.Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando, Yasuhide Takasu
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Patent number: D583842Type: GrantFiled: June 24, 2008Date of Patent: December 30, 2008Assignee: NSK- Warner K.K.Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando
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Patent number: D586832Type: GrantFiled: August 29, 2008Date of Patent: February 17, 2009Assignee: NSK-Warner K.K.Inventors: Hirobumi Shirataki, Shinya Okuma, Tomoharu Ando, Yasuhide Takasu