Patents by Inventor Yuichi Tarukawa

Yuichi Tarukawa 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).

  • Publication number: 20210355995
    Abstract: A sealing device is disposed between an inner member and an outer member that rotate relative to each other to seal a gap between the inner member and the outer member of the sealing device, and includes a first sealing member including a cylindrical part to be mounted to the outer member, and an annular part that extends radially inward from the cylindrical part toward the inner member; and a second sealing member including a sleeve to be mounted to the inner member, and a flange that extends radially outward from the sleeve, the flange facing the annular part of the first sealing member. The first sealing member includes at least three axial lips made from an elastic material that extends from the annular part toward the flange of the second sealing member. An axial lip disposed radially outer side has an interference that is greater than that of an axial lip disposed radially inner side.
    Type: Application
    Filed: November 5, 2019
    Publication date: November 18, 2021
    Applicant: NOK CORPORATION
    Inventors: Shintaro SUGAWARA, Masahiro SEKI, Yuichi TARUKAWA
  • Patent number: 10794428
    Abstract: There are provided a sealing device and a hub bearing that can reduce torque. Pear-skin-like projections and depressions are provided on each of a sliding surface in a lip for foreign object (a side lip 121a and a middle lip 121b) and a sliding surface in a lip for grease 122. Roughness of the pear-skin-like projections and depressions provided on the sliding surface of the lip for grease 122 is larger than roughness of the pear-skin-like projections and depressions provided on the sliding surface of the lip for foreign object.
    Type: Grant
    Filed: November 24, 2017
    Date of Patent: October 6, 2020
    Assignee: NOK CORPORATION
    Inventors: Yuichi Shuto, Kei Sasaki, Shohei Yamane, Yuichi Tarukawa, Takuya Kato
  • Patent number: 10473219
    Abstract: In a sealing structure, a sealing device seals a space between a rotational body and a shaft. The sealing device includes an inner side seal portion, an outer side seal portion, and a dust cover. An inner side seal lip of the inner side seal portion extends from an inner side attachment ring toward an outer side and slidably abuts a contacted portion. The outer side seal portion includes the outer side seal lip, and a side lip on an outer peripheral side of the outer side seal lip, and the outer side seal lip and the side lip extend from the outer side attachment ring toward the outer side and slidably abut the dust cover. The dust cover forms a gap between the dust cover and a flange portion of a bracket to which the inner side attachment ring is attached.
    Type: Grant
    Filed: February 21, 2018
    Date of Patent: November 12, 2019
    Assignee: NOK CORPORATION
    Inventors: Yuichi Tarukawa, Takaharu Saza, Atsushi Suzuki, Go Kanzaki
  • Publication number: 20190277340
    Abstract: There are provided a sealing device and a hub bearing that can reduce torque. Pear-skin-like projections and depressions are provided on each of a sliding surface in a lip for foreign object (a side lip 121a and a middle lip 121b) and a sliding surface in a lip for grease 122. Roughness of the pear-skin-like projections and depressions provided on the sliding surface of the lip for grease 122 is larger than roughness of the pear-skin-like projections and depressions provided on the sliding surface of the lip for foreign object.
    Type: Application
    Filed: November 24, 2017
    Publication date: September 12, 2019
    Inventors: Yuichi SHUTO, Kei SASAKI, Shohei YAMANE, Yuichi TARUKAWA, Takuya KATO
  • Publication number: 20190271359
    Abstract: A sealing apparatus includes: an annular reinforcement ring around an axis; and an annular elastic body part around the axis, which is attached to the reinforcement ring and is formed of an elastic body. The elastic body part has: a side lip, an intermediate lip, and a grease lip. A grease as a lubricant is applied to respective inner peripheral side surfaces of the side lip, the intermediate lip, and the grease lip. A thickener of the grease includes no urea-based thickener. In a usage state of the sealing apparatus, a cross sectional area of an inter-lip space enclosed by the side lip, the intermediate lip, and a hub ring is equal to or greater than 3.5 mm2.
    Type: Application
    Filed: May 21, 2019
    Publication date: September 5, 2019
    Inventors: Yuichi TARUKAWA, Yuichi SHUTO, Kei SASAKI, Shohei YAMANE, Takuya KATO
  • Patent number: 10330202
    Abstract: A sealing device has a main lip sealing sealed fluid in a machine inside and a sub lip preventing intrusion of foreign materials in a machine outside, and structured such that both of the lips slidably come into contact with a peripheral surface of a shaft, wherein the sub lip is formed into a shape which is vertical to an axial direction or a shape which is directed to the main lip side, and a stepped shape is provided in the sub lip, the stepped shape unevenly distributing a generation position of a contact pressure peak in relation to the shaft in the sub lip. The sealing device can achieve both the shaft inserting property and the sealing performance in a sealing device having a main lip which seals sealed fluid in a machine inside, and a sub lip which seals foreign materials in a machine outside.
    Type: Grant
    Filed: February 26, 2016
    Date of Patent: June 25, 2019
    Assignee: NOK CORPORATION
    Inventor: Yuichi Tarukawa
  • Publication number: 20180180184
    Abstract: In a sealing structure, a sealing device seals a space between a rotational body and a shaft. The sealing device includes an inner side seal portion, an outer side seal portion, and a dust cover. An inner side seal lip of the inner side seal portion extends from an inner side attachment ring toward an outer side and slidably abuts a contacted portion. The outer side seal portion includes the outer side seal lip, and a side lip on an outer peripheral side of the outer side seal lip, and the outer side seal lip and the side lip extend from the outer side attachment ring toward the outer side and slidably abut the dust cover. The dust cover forms a gap between the dust cover and a flange portion of a bracket to which the inner side attachment ring is attached.
    Type: Application
    Filed: February 21, 2018
    Publication date: June 28, 2018
    Inventors: Yuichi TARUKAWA, Takaharu SAZA, Atsushi SUZUKI, Go KANZAKI
  • Publication number: 20180080563
    Abstract: A sealing device mounted in a vehicle bearing device, provided with a structure capable of releasing pressure and thus suppressing the internal pressure from increasing, in the event where the internal pressure of the bearing device increases in a sealing device having a seal lip provided toward the inner portion of the bearing device. A protrusion forms a gap between the seal lip and a mating sliding member for adjusting the internal pressure of the bearing device, provided within the range of a sliding portion of the seal lip and on a portion of the circumference of the sliding portion. The protrusion is provided as a protrusion positioned on the tip end portion of the seal lip, a rib-shaped protrusion extending in a shaft direction, and a protrusion with a size that wears out after a predetermined operation time elapses.
    Type: Application
    Filed: September 20, 2017
    Publication date: March 22, 2018
    Inventors: Yuichi SHUTO, Kei SASAKI, Shohei YAMANE, Yuichi TARUKAWA, Takuya KATO
  • Publication number: 20180017164
    Abstract: A sealing device has a main lip sealing sealed fluid in a machine inside and a sub lip preventing intrusion of foreign materials in a machine outside, and structured such that both of the lips slidably come into contact with a peripheral surface of a shaft, wherein the sub lip is formed into a shape which is vertical to an axial direction or a shape which is directed to the main lip side, and a stepped shape is provided in the sub lip, the stepped shape unevenly distributing a generation position of a contact pressure peak in relation to the shaft in the sub lip. The sealing device can achieve both the shaft inserting property and the sealing performance in a sealing device having a main lip which seals sealed fluid in a machine inside, and a sub lip which seals foreign materials in a machine outside.
    Type: Application
    Filed: February 26, 2016
    Publication date: January 18, 2018
    Inventor: Yuichi TARUKAWA
  • Patent number: 7798207
    Abstract: Cooled air introduced from an evaporator through a first passage in a housing is divided into laminar flows by a guide structure disposed on an air mixing door. The direction of flow of the cooled air is changed upwardly by guide walls of the guide structure and is further changed upwardly by first walls of the guide structure, after which the cooled air is introduced into a mixer. Heated air introduced from a heater core through a third passage is mixed with the cooled air in the mixer. The mixed air is delivered from a face discharge outlet, a defroster discharge outlet, or a foot discharge outlet into a passenger compartment.
    Type: Grant
    Filed: September 19, 2006
    Date of Patent: September 21, 2010
    Assignee: Keihin Corporation
    Inventor: Yuichi Tarukawa
  • Publication number: 20100133758
    Abstract: To effectively and easily suppress squealing noise occurring when a steering shaft is in strong contact with a bumper portion, a sealing device (1) between a housing and a shaft has a first molding (11) including a bellows-like flexible portion (15) the bumper portion (16), and a seal lip portion (17) integrally on the inner peripheral side of an outer peripheral fixing portion (12) secured to the housing, and a second molding (21) including a second flexible portion (25) and a second bumper portion (26) integrally on the inner peripheral side of a second fixing portion (22) secured to the outer peripheral fixing portion (12), fall out prevention portions (19, 29) are respectively provided on the inner peripheral surfaces of the bumper portion (16) and second bumper portion (26), and resin slide members (20, 30) are fitted without bonding to the fall out prevention portions (19, 29), respectively.
    Type: Application
    Filed: July 24, 2007
    Publication date: June 3, 2010
    Inventors: Go Kanzaki, Shinobu Munekata, Naoto Kobayashi, Yuichi Tarukawa
  • Publication number: 20070062683
    Abstract: Cooled air introduced from an evaporator through a first passage in a housing is divided into laminar flows by a guide structure disposed on an air mixing door. The direction of flow of the cooled air is changed upwardly by guide walls of the guide structure and is further changed upwardly by first walls of the guide structure, after which the cooled air is introduced into a mixer. Heated air introduced from a heater core through a third passage is mixed with the cooled air in the mixer. The mixed air is delivered from a face discharge outlet, a defroster discharge outlet, or a foot discharge outlet into a passenger compartment.
    Type: Application
    Filed: September 19, 2006
    Publication date: March 22, 2007
    Applicant: Keihin Corporation
    Inventor: Yuichi Tarukawa