Patents by Inventor Chul-Woo KWARK
Chul-Woo KWARK 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: 11590801Abstract: The present invention relates to a composition for a non-pneumatic tire spoke. In particular, the non-pneumatic tire spoke prepared from the composition for a non-pneumatic tire spoke has excellent mechanical properties. A composition for a non-pneumatic tire spoke includes a thermoplastic polyester elastomer, a silane-based interfacial binder, and silica particles. The silica particles have an average particle diameter of 100 to 300 ?m.Type: GrantFiled: November 7, 2018Date of Patent: February 28, 2023Assignees: Kumho Tire Co., Inc., Korea Advanced Institute of Science and TechnologyInventors: Kee Woon Kim, Gwi Seong Shin, Chul Woo Kwark, Soon Wook Hwang, Bumjoon Kim, Jin-Seong Kim, Joonhyeong Choi, Sung Keun Park
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Patent number: 11059326Abstract: A rim for a non-pneumatic tire comprises a cylindrical rim wall portion, and a fixing member disposed to be spaced apart from the rim wall portion in a radial direction. The rim wall portion is provided with a fixing protrusion protruding in the radial direction or a fixing groove depressed in the radial direction.Type: GrantFiled: October 31, 2018Date of Patent: July 13, 2021Assignee: KUMHO TIRE CO., INC.Inventors: Soon Wook Hwang, Kee Woon Kim, Chul Woo Kwark, Gwi Seong Shin, Chang Jung Park
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Patent number: 10960708Abstract: A semi-pneumatic tire includes a tread portion configured to make contact with a road surface, a non-pneumatic portion coupled to an inner circumferential surface of the tread portion. The semi-pneumatic tire further includes a pneumatic portion coupled to an inner circumferential surface of the non-pneumatic portion and provided with a space into which an air is filled, and bonding layers respectively interposed between the tread portion and the non-pneumatic portion and between the non-pneumatic portion and the pneumatic portion. The non-pneumatic portion includes a band portion including an inner band coupled to an outer circumferential surface of the pneumatic portion and an outer band spaced apart from the inner band and surrounding an outer circumferential surface of the inner band, and spokes provided between the inner band and the outer band to connect the inner band and the outer band.Type: GrantFiled: September 19, 2017Date of Patent: March 30, 2021Assignee: KUMHO TIRE CO., INC.Inventors: Chul-Woo Kwark, Kee-Woon Kim, Chang-Jung Park, Gwi-Sung Shin, Soon-Wook Hwang
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Publication number: 20210039438Abstract: The present invention relates to a composition for a non-pneumatic tire spoke. In particular, the non-pneumatic tire spoke prepared from the composition for a non-pneumatic tire spoke has excellent mechanical properties. A composition for a non-pneumatic tire spoke includes a thermoplastic polyester elastomer, a silane-based interfacial binder, and silica particles. The silica particles have an average particle diameter of 100 to 300 ?m.Type: ApplicationFiled: November 7, 2018Publication date: February 11, 2021Inventors: Kee Woon KIM, Gwi Seong SHIN, Chul Woo KWARK, Soon Wook HWANG, Bumjoon KIM, Jin-Seong KIM, Joonhyeong CHOI, Sung Keun PARK
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Publication number: 20210039439Abstract: A non-pneumatic tire comprises: a band part including an inner band and an outer band, the outer band being separated from the inner band by a predetermined distance to surround the inner band; and a spoke part provided to extend in a circumferential direction of the tire between the inner band and the outer band, the spoke part including one or more holes when viewed in the circumferential direction and one or more holes when viewed in an axial direction of the tire.Type: ApplicationFiled: November 20, 2019Publication date: February 11, 2021Inventors: Soon Wook HWANG, Kee Woon KIM, Chul Woo KWARK, Chang Jung PARK
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Patent number: 10814572Abstract: A method of manufacturing an airless tire including a spoke unit includes a first step of injection-molding a first spoke part, a second spoke part, a third spoke part and a fourth spoke part in a disc-like shape. The method further includes a second step of forming a first spoke by fusing the first spoke part and the second spoke part. The method further includes a third step of forming a second spoke by fusing the third spoke part and the fourth spoke part, and a fourth step of forming the spoke unit by fusing the first spoke and the second spoke.Type: GrantFiled: February 14, 2018Date of Patent: October 27, 2020Assignee: KUMHO TIRE CO., INC.Inventors: Gwi Seong Shin, Kee Woon Kim, Soon Wook Hwang, Chul Woo Kwark
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Patent number: 10654318Abstract: In view of the above, the disclosure provides a non-pneumatic tire capable of enhancing a load supporting performance and a shock absorbing effect and improving a braking and traction performance. The present disclosure provides a non-pneumatic tire comprising a band part and a spoke part; where, a band part includes an inner band and an outer band that is separated from the inner band and surrounds an outer peripheral surface of the inner band; and where, a spoke part includes a plurality of first spokes that is arranged in a circumferential direction between the inner band and the outer band and connects the inner band and the outer band. Furthermore, according to another embodiment, a spoke part may include second spokes that connected to first spokes adjacent to each other at wherein first embodiment.Type: GrantFiled: May 17, 2017Date of Patent: May 19, 2020Assignees: KUMHO TIRE CO., INC., THE YOKOHAMA RUBBER COMPANY, LTD.Inventors: Kee-Woon Kim, Chang-Jung Park, Chul-Woo Kwark, Gwi-Sung Shin, Soon-Wook Hwang, Michio Shimizu, Jun Matsuda
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Patent number: 10538130Abstract: A non-pneumatic tire includes a band part, including an inner band and an outer band that is separated from the inner band and surrounds an outer peripheral surface of the inner band; and a spoke part, extending in a circumferential direction between the inner band and the outer band, having a circumferential cross section having one or more holes.Type: GrantFiled: July 7, 2017Date of Patent: January 21, 2020Assignees: KUMHO TIRE CO., INC., THE YOKOHAMA RUBBER COMPANY, LTD.Inventors: Kee-Woon Kim, Chul-Woo Kwark, Chang-Jung Park, Gwi-Sung Shin, Soon-Wook Hwang, Michio Shimizu, Jun Matsuda
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Publication number: 20190152256Abstract: A rim for a non-pneumatic tire comprises a cylindrical rim wall portion, and a fixing member disposed to be spaced apart from the rim wall portion in a radial direction. The rim wall portion is provided with a fixing protrusion protruding in the radial direction or a fixing groove depressed in the radial direction.Type: ApplicationFiled: October 31, 2018Publication date: May 23, 2019Inventors: Soon Wook HWANG, Kee Woon KIM, Chul Woo KWARK, Gwi Seong SHIN, Chang Jung PARK
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Publication number: 20190143619Abstract: A method of manufacturing an airless tire including a spoke unit includes a first step of injection-molding a first spoke part, a second spoke part, a third spoke part and a fourth spoke part in a disc-like shape. The method further includes a second step of forming a first spoke by fusing the first spoke part and the second spoke part. The method further includes a third step of forming a second spoke by fusing the third spoke part and the fourth spoke part, and a fourth step of forming the spoke unit by fusing the first spoke and the second spoke.Type: ApplicationFiled: February 14, 2018Publication date: May 16, 2019Inventors: Gwi Seong SHIN, Kee Woon KIM, Soon Wook HWANG, Chul Woo KWARK
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Publication number: 20180290492Abstract: A semi-pneumatic tire includes a tread portion configured to make contact with a road surface, a non-pneumatic portion coupled to an inner circumferential surface of the tread portion. The semi-pneumatic tire further includes a pneumatic portion coupled to an inner circumferential surface of the non-pneumatic portion and provided with a space into which an air is filled, and bonding layers respectively interposed between the tread portion and the non-pneumatic portion and between the non-pneumatic portion and the pneumatic portion. The non-pneumatic portion includes a band portion including an inner band coupled to an outer circumferential surface of the pneumatic portion and an outer band spaced apart from the inner band and surrounding an outer circumferential surface of the inner band, and spokes provided between the inner band and the outer band to connect the inner band and the outer band.Type: ApplicationFiled: September 19, 2017Publication date: October 11, 2018Inventors: Chul-Woo KWARK, Kee-Woon KIM, Chang-Jung PARK, Gwi-Sung SHIN, Soon-Wook HWANG
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Publication number: 20180029419Abstract: A non-pneumatic tire includes a band part, including an inner band and an outer band that is separated from the inner band and surrounds an outer peripheral surface of the inner band; and a spoke part, extending in a circumferential direction between the inner band and the outer band, having a circumferential cross section having one or more holes.Type: ApplicationFiled: July 7, 2017Publication date: February 1, 2018Inventors: Kee-Woon KIM, Chul-Woo KWARK, Chang-Jung PARK, Gwi-Sung SHIN, Soon-Wook HWANG, Michio SHIMIZU, Jun MATSUDA
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Publication number: 20180029420Abstract: In view of the above, the disclosure provides a non-pneumatic tire capable of enhancing a load supporting performance and a shock absorbing effect and improving a braking and traction performance. The present disclosure provides a non-pneumatic tire comprising a band part and a spoke part; where, a band part includes an inner band and an outer band that is separated from the inner band and surrounds an outer peripheral surface of the inner band; and where, a spoke part includes a plurality of first spokes that is arranged in a circumferential direction between the inner band and the outer band and connects the inner band and the outer band. Furthermore, according to another embodiment, a spoke part may include second spokes that connected to first spokes adjacent to each other at wherein first embodiment.Type: ApplicationFiled: May 17, 2017Publication date: February 1, 2018Inventors: Kee-Woon Kim, Chang-Jung Park, Chul-Woo Kwark, Gwi-Sung Shin, Soon-Wook Hwang, Michio Shimizu, Jun Matsuda