Patents by Inventor Yasuyoshi Hayashi
Yasuyoshi Hayashi 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: 11460071Abstract: An object of the present invention to provide a tapered roller bearing in which a flange portion is formed at a large-diameter end of an outer ring track surface of an outer ring, capable of providing high moment stiffness and long life without extremely decreasing its pure axial load capacity.Type: GrantFiled: December 4, 2019Date of Patent: October 4, 2022Assignee: NTN CorporationInventors: Yasuyoshi Hayashi, Takashi Wakisaka, Sahoko Manda
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Publication number: 20220018391Abstract: An object of the present invention to provide a tapered roller bearing in which a flange portion is formed at a large-diameter end of an outer ring track surface of an outer ring, capable of providing high moment stiffness and long life without extremely decreasing its pure axial load capacity.Type: ApplicationFiled: December 4, 2019Publication date: January 20, 2022Inventors: Yasuyoshi HAYASHI, Takashi WAKISAKA, Sahoko MANDA
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Patent number: 10378580Abstract: To provide a tapered roller bearing provided with a retainer formed of resin capable of being molded by using a simple molding die, and capable of retaining a tapered roller stably when the tapered roller and the retainer are integrated, and capable of improving mechanical strength and lubricating performance on a guide surface as needed. A retainer 5 in the tapered roller bearing is formed of an injection molded body formed by injection molding a resin composition. The retainer 5 includes a large diameter ring portion 5a, a small diameter ring portion 5b, and a column portion 5c which joins both of them. A pocket portion 6 is formed between the column portions adjacent to each other. An injection molding die dividing line X along an axial direction is formed on the column portion 5c.Type: GrantFiled: April 8, 2016Date of Patent: August 13, 2019Assignee: NTN CORPORATIONInventors: Yasuyoshi Hayashi, Takashi Wakisaka
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Patent number: 10280980Abstract: A bearing device has rolling bearings each having an inner ring mounted on a main shaft and an outer ring; an inner ring spacer interposed between the inner rings of the neighboring rolling bearings and mounted on the main shaft; an outer ring spacer interposed between the outer rings of the neighboring rolling bearings; and a cooling structure. The cooling structure includes a nozzle provided in the outer ring spacer to supply a cooling fluid to the rolling bearings by blowing the cooling fluid to an outer peripheral surface of the inner ring spacer. The nozzle has a discharge port side that is inclined forwardly with respect to a direction of rotation of the main shaft. The outer peripheral surface of the inner ring spacer is shaped to guide the cooling fluid, discharged from the nozzle, towards the neighboring rolling bearings on both sides.Type: GrantFiled: November 3, 2016Date of Patent: May 7, 2019Assignee: NTN CORPORATIONInventors: Masatsugu Mori, Mamoru Mizutani, Yuushi Onda, Kenji Tamada, Yasuyoshi Hayashi
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Publication number: 20180119735Abstract: To provide a tapered roller bearing provided with a retainer formed of resin capable of being molded by using a simple molding die, and capable of retaining a tapered roller stably when the tapered roller and the retainer are integrated, and capable of improving mechanical strength and lubricating performance on a guide surface as needed. A retainer 5 in the tapered roller bearing is formed of an injection molded body formed by injection molding a resin composition. The retainer 5 includes a large diameter ring portion 5a, a small diameter ring portion 5b, and a column portion 5c which joins both of them. A pocket portion 6 is formed between the column portions adjacent to each other. An injection molding die dividing line X along an axial direction is formed on the column portion 5c.Type: ApplicationFiled: April 8, 2016Publication date: May 3, 2018Inventors: Yasuyoshi HAYASHI, Takashi Wakisaka
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Publication number: 20170051790Abstract: A bearing device has rolling bearings each having an inner ring mounted on a main shaft and an outer ring; an inner ring spacer interposed between the inner rings of the neighboring rolling bearings and mounted on the main shaft; an outer ring spacer interposed between the outer rings of the neighboring rolling bearings; and a cooling structure. The cooling structure includes a nozzle provided in the outer ring spacer to supply a cooling fluid to the rolling bearings by blowing the cooling fluid to an outer peripheral surface of the inner ring spacer. The nozzle has a discharge port side that is inclined forwardly with respect to a direction of rotation of the main shaft. The outer peripheral surface of the inner ring spacer is shaped to guide the cooling fluid, discharged from the nozzle, towards the neighboring rolling bearings on both sides.Type: ApplicationFiled: November 3, 2016Publication date: February 23, 2017Applicant: NTN CORPORATIONInventors: Masatsugu MORI, Mamoru Mizutani, Yuushi Onda, Kenji Tamada, Yasuyoshi Hayashi
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Patent number: 9541137Abstract: A bearing device includes an outer ring spacer and an inner ring spacer, which are interposed between outer rings of a plurality of axially juxtaposed rolling bearings and inner rings of such rolling bearings, respectively. The outer ring and the outer ring spacer are disposed within a housing while the inner ring and the inner ring spacer are mounted on a main shaft. A cooling structure including a nozzle is provided in the outer ring spacer for blowing a cooling fluid to an outer peripheral surface of the inner ring spacer to thereby supply the cooling fluid to the rolling bearing. The nozzle is provided with its discharge port side inclined forwardly with respect to the direction of rotation of the main shaft.Type: GrantFiled: September 19, 2013Date of Patent: January 10, 2017Assignee: NTN CORPORATIONInventors: Masatsugu Mori, Mamoru Mizutani, Yuushi Onda, Kenji Tamada, Yasuyoshi Hayashi
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Publication number: 20150226266Abstract: A bearing device includes an outer ring spacer (4) and an inner ring spacer (5), which are interposed between outer rings of a plurality of axially juxtaposed rolling bearings and inner rings (3) of such rolling bearings, respectively. The outer ring and the outer ring spacer (4) are disposed within a housing (6) while the inner ring (3) and the inner ring spacer (5) are mounted on a main shaft (7). A nozzle (12) is provided in the outer ring spacer (4) for blowing a cooling fluid to an outer peripheral surface of an inner ring (3) or the inner ring spacer (4) to thereby supply the cooling fluid to the rolling bearing. The nozzle (12) is provided with its discharge port side inclined forwardly with respect to the direction of rotation of the main shaft (7).Type: ApplicationFiled: September 19, 2013Publication date: August 13, 2015Applicant: NTN CORPORATIONInventors: Masatsugu Mori, Mamoru Mizutani, Yuushi Onda, Kenji Tamada, Yasuyoshi Hayashi
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Patent number: 8979384Abstract: A rolling bearing assembly in which the number of components is reduced, and a high speed operation can be enabled with an increase of the stirring resistance being avoided by a sufficient discharge of lubricant oil and with an increase of temperature within the bearing assembly being suppressed. The rolling bearing assembly includes a pair of raceway rings, which are inner and outer rings, a plurality of rolling elements interposed between the inner and outer rings and a retailer for retaining the rolling elements. Each of the inner and outer rings is provided with an axially extending raceway ring extension portion and an oil supply and drainage mechanism for supplying a lubricant oil, which concurrently serves as a bearing cooling medium, to the bearing assembly and for discharging the lubricant oil to outside of the bearing assembly is provided in the raceway ring extension portion.Type: GrantFiled: October 6, 2011Date of Patent: March 17, 2015Assignee: NTN CorporationInventors: Yuushi Onda, Mamoru Mizutani, Yasuyoshi Hayashi, Masaki Kato
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Publication number: 20130223779Abstract: A rolling bearing assembly in which the number of components is reduced, and a high speed operation can be enabled with an increase of the stirring resistance being avoided by a sufficient discharge of lubricant oil and with an increase of temperature within the bearing assembly being suppressed. The rolling bearing assembly includes a pair of raceway rings, which are inner and outer rings, a plurality of rolling elements interposed between the inner and outer rings and a retailer for retaining the rolling elements. Each of the inner and outer rings is provided with an axially extending raceway ring extension portion and an oil supply and drainage mechanism for supplying a lubricant oil, which concurrently serves as a bearing cooling medium, to the bearing assembly and for discharging the lubricant oil to outside of the bearing assembly is provided in the raceway ring extension portion.Type: ApplicationFiled: October 6, 2011Publication date: August 29, 2013Applicant: NTN CORPORATIONInventors: Yuushi Onda, Mamoru Mizutani, Yasuyoshi Hayashi, Masaki Kato
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Patent number: D809033Type: GrantFiled: December 28, 2015Date of Patent: January 30, 2018Assignee: NTN CORPORATIONInventors: Takashi Wakisaka, Yasuyoshi Hayashi
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Patent number: D830434Type: GrantFiled: December 28, 2015Date of Patent: October 9, 2018Assignee: NTN CORPORATIONInventors: Takashi Wakisaka, Yasuyoshi Hayashi
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Patent number: D830435Type: GrantFiled: December 13, 2017Date of Patent: October 9, 2018Assignee: NTN CORPORATIONInventors: Takashi Wakisaka, Yasuyoshi Hayashi
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Patent number: D861757Type: GrantFiled: September 5, 2018Date of Patent: October 1, 2019Assignee: NTN CORPORATIONInventors: Takashi Wakisaka, Yasuyoshi Hayashi