Patents by Inventor Tatsuo Kawase
Tatsuo Kawase 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: 11614070Abstract: A vertical axis wind turbine (2) includes a vertical rotation shaft (3a) and a plurality of vertical blades (5) arranged around the rotation shaft and attached to the rotation shaft through an arm (6a, 6b). Each of the blades (5) includes a blade main part (5a) and blade-tip inclined parts (5b) extending from upper and lower ends of the blade main part (5a) toward the rotation shaft (3a). Each of the blade-tip inclined parts (5b) has a smaller thickness than a thickness of the blade main part (5a). A wind power generating device (1) includes a vertical axis wind turbine (2) having the above configuration and a generator (3).Type: GrantFiled: November 24, 2020Date of Patent: March 28, 2023Assignee: NTN CORPORATIONInventors: Takeru Ito, Tatsuo Kawase, Tatsuya Hayashi
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Publication number: 20210095637Abstract: A vertical axis wind turbine (2) includes a vertical rotation shaft (3a) and a plurality of vertical blades (5) arranged around the rotation shaft and attached to the rotation shaft through an arm (6a, 6b). Each of the blades (5) includes a blade main part (5a) and blade-tip inclined parts (5b) extending from upper and lower ends of the blade main part (5a) toward the rotation shaft (3a). Each of the blade-tip inclined parts (5b) has a smaller thickness than a thickness of the blade main part (5a). A wind power generating device (1) includes a vertical axis wind turbine (2) having the above configuration and a generator (3).Type: ApplicationFiled: November 24, 2020Publication date: April 1, 2021Applicant: NTN CORPORATIONInventors: Takeru ITO, Tatsuo KAWASE, Tatsuya HAYASHI
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Patent number: 8506167Abstract: The present invention has an object of improving wear resistance of a thrust bearing portion. A pressure is generated by a dynamic pressure effect of a lubricating oil in a thrust bearing gap between a thrust bearing surface including dynamic pressure generating grooves and a smooth thrust receiving surface so as to rotatably support a shaft member in an axial direction. The thrust receiving surface is formed as a flat surface, whereas an inclined plane is provided on the thrust bearing surface so as to provide a reduced portion having a decreasing axial width in a radially outward direction in the thrust bearing gap.Type: GrantFiled: March 17, 2005Date of Patent: August 13, 2013Assignee: NTN CorporationInventors: Tatsuya Hayashi, Tatsuo Kawase, Kiyotaka Kusunoki, Isao Komori, Katsuo Shibahara
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Patent number: 7604411Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: GrantFiled: May 12, 2008Date of Patent: October 20, 2009Assignee: NTN CorporationInventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Patent number: 7604410Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: GrantFiled: September 12, 2007Date of Patent: October 20, 2009Assignee: NTN CorporationInventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Patent number: 7566174Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: GrantFiled: January 10, 2008Date of Patent: July 28, 2009Assignee: NTN CorporationInventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Publication number: 20080212906Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: ApplicationFiled: May 12, 2008Publication date: September 4, 2008Inventors: TETSUYA KURIMURA, Yasuhiro Yamamoto, Tatsuo Kawase
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Publication number: 20080187258Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: ApplicationFiled: September 12, 2007Publication date: August 7, 2008Inventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Publication number: 20080107368Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: ApplicationFiled: January 10, 2008Publication date: May 8, 2008Inventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Publication number: 20080037916Abstract: The present invention has an object of improving wear resistance of a thrust bearing portion. A pressure is generated by a dynamic pressure effect of a lubricating oil in a thrust bearing gap C between a thrust bearing surface 11a including dynamic pressure generating grooves and a smooth thrust receiving surface 11b so as to rotatably support a shaft member 2 in an axial direction. The thrust receiving surface 11b is formed as a flat surface, whereas an inclined plane 17 is provided on the thrust bearing surface 11a so as to provide a reduced portion 15 having a decreasing axial width in a radially outward direction in the thrust bearing gap C.Type: ApplicationFiled: March 17, 2005Publication date: February 14, 2008Inventors: Tatsuya Hayashi, Tatsuo Kawase, Kiyotaka Kusunoki, Isao Komori, Katsuo Shibahara
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Patent number: 7296931Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: GrantFiled: January 6, 2006Date of Patent: November 20, 2007Assignee: NTN CorporationInventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Publication number: 20070230843Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: ApplicationFiled: June 7, 2007Publication date: October 4, 2007Inventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Publication number: 20060120643Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: ApplicationFiled: January 6, 2006Publication date: June 8, 2006Inventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Patent number: 7048444Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: GrantFiled: November 13, 2002Date of Patent: May 23, 2006Assignee: NTN CorporationInventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Publication number: 20030091249Abstract: An inner space of a housing sealed with a seal member as well as internal pores of a bearing member (pores in a porous structure) are filled with a lubricating oil without the presence of air, so that the oil surface of the lubricating oil is within a seal space. Under a reduced pressure of 100 Torr, no lubricating oil leaks outside of the housing even at any attitude of the fluid lubricated bearing device such as normal, inverted, or horizontal attitude.Type: ApplicationFiled: November 13, 2002Publication date: May 15, 2003Inventors: Tetsuya Kurimura, Yasuhiro Yamamoto, Tatsuo Kawase
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Patent number: 6257386Abstract: A power cut/connect device is proposed which is axially compact and is usable in a limited space. The device includes a first input member coupled to a power shaft, an output member mounted coaxially with the first input member, a first two-way clutch provided between the first input member and the output member, a second input member coaxially mounted with the output member, a second two-way clutch provided between the output member and the second input member so as to be disposed coaxially with and around the first two-way clutch, and a control unit for controlling the first and second two-way clutches for interruption and connection of power.Type: GrantFiled: February 23, 2000Date of Patent: July 10, 2001Assignee: NTN CorporationInventors: Takahide Saito, Tatsuo Kawase, Takashi Nozaki, Makoto Yasui, Shiro Goto
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Patent number: 5931272Abstract: An input-side rotary member 20, including an input gear 7, and an output-side rotary member 19, including a torque cam 1 fixedly mounted on an output shaft 12, are provided on the same axis of rotation. The input-side rotary member 20 is provided with an input cage 3 having a plurality of radially extending pockets 30 and balls 9 movably accommodated within the respective pockets 30. The torque cam 1 is provided with a generally annular cam groove 31 in which the balls 9 move rollingly, which groove 31 is of a shape having a distance from the axis of rotation that varies continuously. A presser member 2 is provided with a pressing face 2a by which the balls 9 are urged by a spring element 4. In this way, the input rotation of, for example, an engine can be reduced and then transmitted to a driven device such as an engine auxiliary equipment 102 with respect to the boundary set by a preset torque value.Type: GrantFiled: April 29, 1998Date of Patent: August 3, 1999Assignee: NTN CorporationInventors: Shigeaki Fukushima, Tatsuo Kawase
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Patent number: 5851163Abstract: Plating 5 having good slide friction characteristics is applied onto the pocket surfaces 4a1, 4a2, which are opposite each other in the circumferential direction of the pockets 4a of the carrier and onto the end face 4a3 in the axial direction. It is possible to improve the lubrication conditions at the contacting area of the outer circumferential surface of the planetary rollers and the pocket surface 4a1 of the carrier 4 by coating the plating 5 having good slide friction characteristics onto the pocket surfaces 4a1,4a2 of the pocket 4 of the carrier 4 and further onto the end face 4a3. That is, the friction force at the contacting area is able to be decreased by the plating 5 having good friction characteristics, whereby even in a case where the contacting area is lubricated with a little lubricant, thermal deterioration of the lubricant due to heat generation of the contacting area is suppressed and good lubrication actions can be expected.Type: GrantFiled: March 27, 1997Date of Patent: December 22, 1998Assignee: NTN CorporationInventors: Tatsuo Kawase, Takashi Nozaki, Tomoaki Makino, Satoshi Utsunomiya
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Patent number: 5746676Abstract: A friction type continuously variable transmission has double cones kept in contact with an input shaft and a drive cone and is capable of transmitting the rotation of the input shaft to an output shaft so that the output shaft rotates at a higher speed than the input shaft. A mechanism is provided for preventing the double cones from rotating about the input shaft and from coming off of their support shafts. A stay is mounted on a carrier supporting the double cones. The stay carries a guide roller bearing received in a guide fixed to a housing of the transmission. The stay thus prevents the rotation of the carrier while allowing only its axial movement. A stopper surface is provided at one end of the guide to restrict the axial movement of the carrier within a predetermined range.Type: GrantFiled: May 29, 1996Date of Patent: May 5, 1998Assignee: NTN CorporationInventors: Tatsuo Kawase, Naoshi Hattori, Takashi Nozaki, Tomoaki Makino, Takahide Saito
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Patent number: 5646355Abstract: A torque responsive rotation control device includes a torque limiting mechanism interposed between an input rotary member and an output shaft coaxial with the input rotary member. The torque limiting mechanism includes a torque cam engageable with the output shaft to rotate together therewith and movable axially relative to the output shaft and detachably engageable with the input rotary member in a direction of rotation thereof; and a plurality of springs for biasing the torque cam in a direction required for the torque cam to engage the input rotary member.Type: GrantFiled: June 14, 1996Date of Patent: July 8, 1997Assignee: NTN CorporationInventors: Shigeaki Fukushima, Tatsuo Kawase