Patents by Inventor Kasumi Yamamoto
Kasumi Yamamoto 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: 8678660Abstract: A sealing device includes a bottom of an axial concave portion in a surface of an elastic member forming a radial lip, facing away from a flange portion in an axial direction overlaps an end face of a radially-extending portion of a core metal member, facing a tubular portion, in a radial direction. A bottom of a radial concave portion of the elastic member forming the radial lip, facing the tubular portion of a slinger is spaced from the end face of the core metal member toward a flange portion in the axial direction.Type: GrantFiled: November 19, 2008Date of Patent: March 25, 2014Assignees: JTEKT Corporation, Koyo Sealing Techno Co., Ltd.Inventors: Masahiro Tabata, Syuji Fujita, Shunichi Fujiwara, Kasumi Yamamoto
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Patent number: 8557904Abstract: The invention provides a sealing device in which adhesion of an elastic member used for the sealing device is controlled, and a coefficient of friction against a member sliding against the sealing device is reduced. A sealing device includes a first member 1, a second member 2 moving relative to the first member, and an elastic member 3 fixed to the first member 1 and sliding against the second member 2, and is characterized in that: the elastic member 3 is made of a rubber composition containing a metal soap, an organic acid amide and an oil-containing particle.Type: GrantFiled: November 19, 2008Date of Patent: October 15, 2013Assignees: Jtekt Corporation, Koyo Sealing Techno Co., Ltd.Inventors: Masahiro Tabata, Michitoshi Mitsumaru, Daisuke Ozaki, Atsuhito Tada, Eiji Namira, Kasumi Yamamoto
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Patent number: 8202006Abstract: Prior to assembly of an elastic member (51) to a slinger (52), a radially inner surface (58) of a first portion (56) is formed in a concave shape, and a radially inner surface (59) of a second portion (57) is formed in a conical shape. The second axial lip (55) is adapted such that, after the elastic member (51) is assembled to the slinger (52) and when a second axial lip (55) is in a not-yet-worn state, the second axial lip (55) does not come into contact with a fixation section (65) of the slinger (52).Type: GrantFiled: October 23, 2007Date of Patent: June 19, 2012Assignee: Koyo Sealing Techno Co., LtdInventors: Masahiro Tabata, Kazutoshi Yamamoto, Kasumi Yamamoto, legal representative
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Publication number: 20100295254Abstract: The invention provides a sealing device in which adhesion of an elastic member used for the sealing device is controlled, and a coefficient of friction against a member sliding against the sealing device is reduced. A sealing device includes a first member 1, a second member 2 moving relative to the first member, and an elastic member 3 fixed to the first member 1 and sliding against the second member 2, and is characterized in that: the elastic member 3 is made of a rubber composition containing a metal soap, an organic acid amide and an oil-containing particle.Type: ApplicationFiled: November 19, 2008Publication date: November 25, 2010Inventors: Masahiro Tabata, Kazutoshi Yamamoto, Kasumi Yamamoto, Michitoshi Mitsumaru, Daisuke Ozaki, Atsuhito Tada, Eiji Namira
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Publication number: 20100272382Abstract: The invention provides a sealing device, a rolling bearing and a rolling bearing for a wheel, in which a torque can be reduced, and also the air and lubricant are less liable to escape from the interior of the bearing to the exterior of the bearing, and the air and foreign matters are less liable to intrude into the bearing from the exterior of the bearing.Type: ApplicationFiled: November 19, 2008Publication date: October 28, 2010Inventors: Kazutoshi Yamamoto, Kasumi Yamamoto, Masahiro Tabata
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Publication number: 20100254647Abstract: The invention provides a sealing device, a rolling bearing and a rolling bearing for a wheel, in which a torque can be reduced, and also the air and lubricant are less liable to escape from the interior of the bearing to the exterior of the bearing, and the air and foreign matters are less liable to intrude into the bearing from the exterior of the bearing. A bottom 73 of an axial concave portion in a surface of an elastic member 51 forming a radial lip 70, facing away from a flange portion in an axial direction overlaps an end face 77 of a radially-extending portion 61 of a core metal member 50, facing a tubular portion 65, in a radial direction. A bottom 81 of a radial concave portion of the elastic member 51 forming the radial lip 70, facing the tubular portion 65 of a slinger 52 is spaced from the end face 77 of the core metal member 50 toward a flange portion 66 in the axial direction.Type: ApplicationFiled: November 19, 2008Publication date: October 7, 2010Inventors: Masahiro Tabata, Kazutoshi Yamamoto, Kasumi Yamamoto, Syuji Fujita, Shunichi Fujiwara
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Publication number: 20100104232Abstract: Prior to assembly of an elastic member (51) to a slinger (52), a radially inner surface (58) of a first portion (56) is formed in a concave shape, and a radially inner surface (59) of a second portion (57) is formed in a conical shape. The second axial lip (55) is adapted such that, after the elastic member (51) is assembled to the slinger (52) and when a second axial lip (55) is in a not-yet-worn state, the second axial lip (55) does not come into contact with a fixation section (65) of the slinger (52).Type: ApplicationFiled: October 23, 2007Publication date: April 29, 2010Inventors: Masahiro Tabata, Kazutoshi Yamamoto, Kasumi Yamamoto
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Patent number: 6112040Abstract: An ozone-exhaust duct is incorporated in an electrophotographic printer to exhaust air, containing ozone and dust articles, and an exit structure of the duct is associated with an ozone-filter. In the exit-structure, a dust trapper is provided under an exit end portion of the duct near the ozone-filter to define a dust-trapping chamber such that a cross-sectional area of the exit end portion of the duct is increased in comparison with a cross-sectional area of a remaining portion of the duct, whereby a velocity of the air, introduced from the remaining portion of the duct into the exit end portion thereof, slows down, due to the existence of the ozone-filter and the increased cross-sectional area of the exit end portion of the duct, resulting in trapping of a part of the dust particles, contained in the introduced air, in the dust-trapping chamber of the dust trapper due to gravity.Type: GrantFiled: November 2, 1999Date of Patent: August 29, 2000Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Hiroyuki Saito, Kasumi Yamamoto
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Patent number: 5926680Abstract: A fixing unit, used for fixing images on a recording sheet, includes a heat roller accommodating a heater, and a press roller movable between a retracted position and an operating position. The heat roller is rotated by a driving mechanism. A moving mechanism opens and closes a gap between the press roller and the heat roller by moving the press roller between the retracted position and the operating position. An assist gear rotates the press roller in a predetermined direction when the opening/closing mechanism moves the press roller toward the operating position.Type: GrantFiled: July 14, 1997Date of Patent: July 20, 1999Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Kasumi Yamamoto, Masatoshi Takano, Tomoyuki Nishikawa, Tsutomu Sato, Tsukasa Yanashima, Yutaka Ishikawa, Hiroyuki Saito
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Patent number: 5842100Abstract: A fixing unit includes a heat roller accommodating a heater and a press roller movable toward and away from the heat roller. Both shaft members of the heat roller are supported by two receiving members, with a clearance provided between each shaft member and respective receiving member. A driven gear is provided to one of the shaft member, which engages a rotating mechanism for rotating the heat roller. The fixing unit further includes a biasing member which biases the other shaft of the heat roller away from the press roller within the clearance, in such a manner that the heat roller and the press roller become parallel when the above-described one shaft member is urged away from the press roller due to the meshing engagement of the driven gear and the rotating mechanism.Type: GrantFiled: August 5, 1997Date of Patent: November 24, 1998Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Tsukasa Yanashima, Masatoshi Takano, Tomoyuki Nishikawa, Tsutomu Sato, Kasumi Yamamoto, Yutaka Ishikawa
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Patent number: 5835835Abstract: A fixing unit includes a heat roller accommodating a heater and a press roller movable between an operating position in which the recording sheet is nipped by the rollers and a retracted position. A driven gear is provided to one axial end of heat roller, which engages a rotating mechanism for rotating the heat roller. An opening/closing mechanism is arranged to move a first axial end (at the same side as the driven gear of the heat roller) of said press roller to said operating position before moving a second axial end of the press roller to the operating position.Type: GrantFiled: August 5, 1997Date of Patent: November 10, 1998Assignee: Asahi Kogaku Kogyo Kabushiki KaishaInventors: Tomoyuki Nishikawa, Masatoshi Takano, Kasumi Yamamoto, Tsutomu Sato, Tsukasa Yanashima, Hiroyuki Saito