Patents by Inventor Hikaru Katori
Hikaru Katori 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: 11739844Abstract: Two conflicting functions of sealing and lubrication of sliding faces are achieved for a long time. The sliding face of a rotating-side seal ring 3 is provided with dynamic pressure generation grooves 11 configured to communicate with the circumferential edge on the inner peripheral side of the sliding face and not to communicate with the circumferential edge on the outer peripheral side. A spring 7 is provided on the back side of a stationary-side seal ring 6 for pressing the stationary-side seal ring 6 against the sliding face of the rotating-side seal ring 3. A spring holder 8 is provided between the back side of the stationary-side seal ring 6 and the spring 7.Type: GrantFiled: September 7, 2017Date of Patent: August 29, 2023Inventors: Hikaru Katori, Keiichi Chiba, Masatoshi Itadani, Tadahiro Kimura, Akira Yoshino
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Publication number: 20230235780Abstract: An annular sliding component includes a sliding surface provided with a plurality of fluid introduction grooves communicating with a space on the side of a sealing target fluid and introducing the sealing target fluid thereinto and a plurality of inclined grooves extending from a leakage side toward the sealing target fluid and generating a dynamic pressure and the sliding surface of the sliding component is provided with a reverse inclined groove which is provided on the side of the sealing target fluid of the inclined groove, extends in a reverse direction with respect to the inclined groove, and generates a dynamic pressure.Type: ApplicationFiled: May 31, 2021Publication date: July 27, 2023Inventors: Yuta NEGISHI, Ryosuke UCHIYAMA, Hiroki INOUE, Minori ONUMA, Yoshiaki TAKIGAHIRA, Hikaru KATORI, Nobuo NAKAHARA, Takeshi HOSOE
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Publication number: 20230228292Abstract: An annular sliding component includes a sliding surface provided with a plurality of fluid introduction grooves communicating with a space on the side of a sealing target fluid and introducing the sealing target fluid and a plurality of inclined grooves extending from a leakage side toward the sealing target fluid and generating a dynamic pressure and the sliding surface of the sliding component is provided with at least a concave portion disposed between adjacent two of the fluid introduction grooves in the circumferential direction.Type: ApplicationFiled: May 31, 2021Publication date: July 20, 2023Inventors: Yuta NEGISHI, Ryosuke UCHIYAMA, Hiroki INOUE, Minori ONUMA, Yoshiaki TAKIGAHIRA, Hikaru KATORI, Nobuo NAKAHARA, Takeshi HOSOE
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Patent number: 11221074Abstract: The purpose of the present invention is to provide a mechanical seal in which a stationary-side sealing ring can follow the movement of a rotating-side sealing ring to provide reliable sealing properties and by which the entire device can be made compact. A mechanical seal in which a rotating-side sealing ring 13 attached to a shaft 2 and a stationary-side sealing ring 21 attached to a housing 3 slide relative to each other and seal between the housing 3 and the shaft 2 includes a case 22 which is attached to the housing 3 and which contains the stationary-side sealing ring 21, and a seal member 23 which is disposed between the case 22 and the stationary-side sealing ring 21, and the case 22 includes a holding part 22d which regulates the seal member 23 from moving to both sides in the axial direction thereof.Type: GrantFiled: September 19, 2018Date of Patent: January 11, 2022Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Tadahiro Kimura, Hikaru Katori, Masatoshi Itadani, Takeshi Hosoe, Yasuhiro Ikeda, Tomoko Yamaki
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Publication number: 20200278029Abstract: The purpose of the present invention is to provide a mechanical seal in which a stationary-side sealing ring can follow the movement of a rotating-side sealing ring to provide reliable sealing properties and by which the entire device can be made compact. A mechanical seal in which a rotating-side sealing ring 13 attached to a shaft 2 and a stationary-side sealing ring 21 attached to a housing 3 slide relative to each other and seal between the housing 3 and the shaft 2 includes a case 22 which is attached to the housing 3 and which contains the stationary-side sealing ring 21, and a seal member 23 which is disposed between the case 22 and the stationary-side sealing ring 21, and the case 22 includes a holding part 22d which regulates the seal member 23 from moving to both sides in the axial direction thereof.Type: ApplicationFiled: September 19, 2018Publication date: September 3, 2020Inventors: Tadahiro KIMURA, Hikaru KATORI, Masatoshi ITADANI, Takeshi HOSOE, Yasuhiro IKEDA, Tomoko YAMAKI
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Patent number: 10704417Abstract: Both conflicting functions of sealing and lubrication of sliding faces are made compatible over an entire period from the time of startup through the time of steady operation. A pair of sliding parts that relatively slide on each other is provided, one of the sliding parts being a stationary-side seal ring, the other of the sliding parts being a rotating-side seal ring, the seal rings each having a sliding face S formed radially for sealing sealed fluid from leaking, at least one of the sliding faces S being provided with fluid introduction grooves 10 configured to communicate with a first peripheral edge of the sliding face S and not to communicate with a second peripheral edge, and being provided with dynamic pressure generation grooves configured to communicate with the second peripheral edge of the sliding face S and not to communicate with the first peripheral edge.Type: GrantFiled: April 13, 2016Date of Patent: July 7, 2020Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Yuichiro Tokunaga, Keiichi Chiba, Masatoshi Itadani, Hikaru Katori, Wataru Kimura
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Patent number: 10612665Abstract: A mechanical seal includes: a rotation-side member and a seal case positioned and fixed to each other, and in which the engaged state can be released by bringing the rotation-side member and the seal case closer to each other in the axial direction.Type: GrantFiled: November 4, 2016Date of Patent: April 7, 2020Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Masatoshi Itadani, Keiichi Chiba, Hikaru Katori
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Patent number: 10598286Abstract: In an embodiments, in a sealing face of at least one slide part of a pair of slide parts, a dynamic pressure generation groove 10 is provided so as to be separated not to communicate with a sealed fluid side and a leakage side by land portions on both sealing faces, between an end 10a on the leakage side of the dynamic pressure generation groove 10 and the leakage side, a fluid introduction groove 11 which communicates the dynamic pressure generation groove 10 and the leakage side is provided, and the cross-sectional area of the fluid introduction groove 11 is set smaller than the cross-sectional area of the dynamic pressure generation groove 10. The sealing faces are subjected to fluid lubrication and low friction in a steady operation, and leakage of the sealed fluid and entrance of dust into the sealing faces are suppressed.Type: GrantFiled: May 13, 2016Date of Patent: March 24, 2020Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Yuichiro Tokunaga, Hideyuki Inoue, Wataru Kimura, Tetsuya Iguchi, Takeshi Hosoe, Hidetoshi Kasahara, Takafumi Ota, Keiichi Chiba, Masatoshi Itadani, Hikaru Katori
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Patent number: 10473220Abstract: In an embodiment, in a slide component, dynamic pressure generation grooves 10 are provided on a sealing face of at least one of a pair of slide parts 4, 7 so as to be isolated with no communication from the sealed fluid side and the leakage side by land portions R of both the sealing faces, and a plurality of independently-formed minute recessed sections 11 is provided at positions on the sealing face IS between the dynamic pressure generation grooves 10 and the leakage side, the positions being separated in the radial direction from the dynamic pressure generation grooves. The slide component can make the sealing faces fluid-lubricant and low frictional and prevent leakage of a sealed fluid and incoming of dust to the sealing faces at the time of normal operation.Type: GrantFiled: May 13, 2016Date of Patent: November 12, 2019Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Yuichiro Tokunaga, Hideyuki Inoue, Wataru Kimura, Tetsuya Iguchi, Takeshi Hosoe, Hidetoshi Kasahara, Takafumi Ota, Keiichi Chiba, Masatoshi Itadani, Hikaru Katori
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Publication number: 20190203840Abstract: Two conflicting functions of sealing and lubrication of sliding faces are achieved for a long time. The sliding face of a rotating-side seal ring 3 is provided with dynamic pressure generation grooves 11 configured to communicate with the circumferential edge on the inner peripheral side of the sliding face and not to communicate with the circumferential edge on the outer peripheral side. A spring 7 is provided on the back side of a stationary-side seal ring 6 for pressing the stationary-side seal ring 6 against the sliding face of the rotating-side seal ring 3. A spring holder 8 is provided between the back side of the stationary-side seal ring 6 and the spring 7.Type: ApplicationFiled: September 7, 2017Publication date: July 4, 2019Inventors: Hikaru KATORI, Keiichi CHIBA, Masatoshi ITADANI, Tadahiro KIMURA, Akira YOSHINO
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Patent number: 10337620Abstract: In an embodiment, a sliding component includes a pair of sliding parts (a stationary-side seal ring 7 and a rotating-side seal ring 4) that relatively slide on each other and each have a sliding face S formed radially for sealing sealed fluid from leaking. The sliding face S of at least one sliding part is provided with dynamic pressure generation grooves 10 spaced in a non-communicating manner from the sealed-fluid side and the leakage side by lands R of both sliding faces, and is provided with fluid introduction holes 11 between leakage-side ends 10a of the grooves 10 and the leakage side, for communicating the grooves 10 and the leakage side. Each fluid introduction holes 11 is configured such that a dynamic-pressure-generation-groove-side opening 11a open to a corresponding one of the grooves 10 is axially displaced from a leakage-side opening 11b open to the leakage side.Type: GrantFiled: May 13, 2016Date of Patent: July 2, 2019Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Yuichiro Tokunaga, Hideyuki Inoue, Wataru Kimura, Tetsuya Iguchi, Keiichi Chiba, Masatoshi Itadani, Hikaru Katori
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Patent number: 10337560Abstract: In an embodiment, a sliding face of at least one sliding part of the pair of sliding parts is provided, along its entire circumference, with a trap groove 10 for trapping leakage fluid, located on a leakage side and spaced from the leakage side by a land. A dust entry reduction means 12 for reducing entry of dust from the leakage side while allowing passage of fluid is formed between lands of the pair of sliding parts on the leakage side of the trap groove 10. At the sliding faces of the pair of sliding parts sliding relatively, entry of dust from the leakage side as well as liquid leakage to the leakage side are suppressed.Type: GrantFiled: May 13, 2016Date of Patent: July 2, 2019Assignee: EAGLE INDUSTRY CO., LTD.Inventors: Yuichiro Tokunaga, Hideyuki Inoue, Wataru Kimura, Tetsuya Iguchi, Keiichi Chiba, Masatoshi Itadani, Hikaru Katori
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Publication number: 20180306327Abstract: A mechanical seal includes: a rotation-side member and a seal case positioned and fixed to each other, and in which the engaged state can be released by bringing the rotation-side member and the seal case closer to each other in the axial direction.Type: ApplicationFiled: November 4, 2016Publication date: October 25, 2018Applicant: EAGLE INDUSTRY CO., LTD.Inventors: Masatoshi ITADANI, Keiichi CHIBA, Hikaru KATORI
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Patent number: 10054230Abstract: Provided is a mechanical seal includes a fluid introduction groove provided in a sealing face of a stationary sealing ring and having an opening portion which is opened to the sealed fluid and an end portion which is provided opposite to the opening portion. The end portion being located between respective sealing faces S, the fluid introduction groove introducing the sealed fluid from the opening portion to a clearance between the respective sealing faces S. The fluid introduction groove is provided to be inclined at an acute angle to the sealing face S of the stationary sealing ring in a direction from the end portion to the opening portion.Type: GrantFiled: September 3, 2015Date of Patent: August 21, 2018Assignee: EAGLES INDUSTRY CO., LTD.Inventors: Hikaru Katori, Keiichi Chiba, Masatoshi Itadani
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Publication number: 20180187785Abstract: In an embodiment, in a sliding component, a sliding face S at least one sliding part of a pair of sliding parts is provided with positive pressure generation mechanisms 10 which generate dynamic pressure, an annular pressure release groove 11, and radial grooves 12 which intersect the pressure release groove 11, in which corners 13a and 13b at an intersecting portion of the pressure release groove 11 and the radial grooves 12 are each formed in a curved surface shape such that the pressure release groove 11 and the radial groove 12 are joined by a smooth curved surface. The sliding component can prevent generation of cavitation in a pressure release groove and a radial groove without setting depths of the grooves to be deeper than necessary.Type: ApplicationFiled: June 20, 2016Publication date: July 5, 2018Inventors: Hikaru KATORI, Masatoshi ITADANI, Yuichiro TOKUNAGA, Keiichi CHIBA
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Publication number: 20180172162Abstract: In an embodiment, in a slide component, dynamic pressure generation grooves 10 are provided on a sealing face of at least one of a pair of slide parts 4, 7 so as to be isolated with no communication from the sealed fluid side and the leakage side by land portions R of both the sealing faces, and a plurality of independently-formed minute recessed sections 11 is provided at positions on the sealing face IS between the dynamic pressure generation grooves 10 and the leakage side, the positions being separated in the radial direction from the dynamic pressure generation grooves. The slide component can make the sealing faces fluid-lubricant and low frictional and prevent leakage of a sealed fluid and incoming of dust to the sealing faces at the time of normal operation.Type: ApplicationFiled: May 13, 2016Publication date: June 21, 2018Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Takeshi HOSOE, Hidetoshi KASAHARA, Takafumi OTA, Keiichi CHIBA, Masatoshi ITADANI, Hikaru KATORI
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Publication number: 20180135699Abstract: In an embodiment, a sliding face of at least one sliding part of the pair of sliding parts is provided, along its entire circumference, with a trap groove 10 for trapping leakage fluid, located on a leakage side and spaced from the leakage side by a land. A dust entry reduction means 12 for reducing entry of dust from the leakage side while allowing passage of fluid is formed between lands of the pair of sliding parts on the leakage side of the trap groove 10. At the sliding faces of the pair of sliding parts sliding relatively, entry of dust from the leakage side as well as liquid leakage to the leakage side are suppressed.Type: ApplicationFiled: May 13, 2016Publication date: May 17, 2018Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Keiichi CHIBA, Masatoshi ITADANI, Hikaru KATORI
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Publication number: 20180128377Abstract: In an embodiments, in a sealing face of at least one slide part of a pair of slide parts, a dynamic pressure generation groove 10 is provided so as to be separated not to communicate with a sealed fluid side and a leakage side by land portions on both sealing faces, between an end 10a on the leakage side of the dynamic pressure generation groove 10 and the leakage side, a fluid introduction groove 11 which communicates the dynamic pressure generation groove 10 and the leakage side is provided, and the cross-sectional area of the fluid introduction groove 11 is set smaller than the cross-sectional area of the dynamic pressure generation groove 10. The sealing faces are subjected to fluid lubrication and low friction in a steady operation, and leakage of the sealed fluid and entrance of dust into the sealing faces are suppressed.Type: ApplicationFiled: May 13, 2016Publication date: May 10, 2018Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Takeshi HOSOE, Hidetoshi KASAHARA, Takafumi OTA, Keiichi CHIBA, Masatoshi ITADANI, Hikaru KATORI
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Publication number: 20180128378Abstract: In an embodiment, a sliding component includes a pair of sliding parts (a stationary-side seal ring 7 and a rotating-side seal ring 4) that relatively slide on each other and each have a sliding face S formed radially for sealing sealed fluid from leaking. The sliding face S of at least one sliding part is provided with dynamic pressure generation grooves 10 spaced in a non-communicating manner from the sealed-fluid side and the leakage side by lands R of both sliding faces, and is provided with fluid introduction holes 11 between leakage-side ends 10a of the grooves 10 and the leakage side, for communicating the grooves 10 and the leakage side. Each fluid introduction holes 11 is configured such that a dynamic-pressure-generation-groove-side opening 11a open to a corresponding one of the grooves 10 is axially displaced from a leakage-side opening 11b open to the leakage side.Type: ApplicationFiled: May 13, 2016Publication date: May 10, 2018Inventors: Yuichiro TOKUNAGA, Hideyuki INOUE, Wataru KIMURA, Tetsuya IGUCHI, Keiichi CHIBA, Masatoshi ITADANI, Hikaru KATORI
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Publication number: 20180073394Abstract: Both conflicting functions of sealing and lubrication of sliding faces are made compatible over an entire period from the time of startup through the time of steady operation. A pair of sliding parts that relatively slide on each other is provided, one of the sliding parts being a stationary-side seal ring, the other of the sliding parts being a rotating-side seal ring, the seal rings each having a sliding face S formed radially for sealing sealed fluid from leaking, at least one of the sliding faces S being provided with fluid introduction grooves 10 configured to communicate with a first peripheral edge of the sliding face S and not to communicate with a second peripheral edge, and being provided with dynamic pressure generation grooves configured to communicate with the second peripheral edge of the sliding face S and not to communicate with the first peripheral edge.Type: ApplicationFiled: April 13, 2016Publication date: March 15, 2018Inventors: Yuichiro TOKUNAGA, Keiichi CHIBA, Masatoshi ITADANI, Hikaru KATORI, Wataru KIMURA