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Saburo Oshima, Tsugito Nakazeki, Teruaki Akamatsu, Motoharu Niki: Turbo pump with magnetically supported impeller. NTN Corporation, Lowe Price LeBlanc & Becker, May 12, 1992: US05112202 (115 worldwide citation)

A turbo pump is disclosed, having a magnetically supported impeller. The turbo pump includes a casing (31) made of a non-magnetic material, an impeller (32) provided in the casing (31), a triaxial controlled magnetic bearing provided outside of the casing (31) for magnetically supporting the impelle ...


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Kenichi Iwamoto, Takashi Koike, Kazuyuki Inokuchi, Motoharu Niki: Piston rod piston detector, autotensioner and belt tension adjuster. NTN Corporation, Wenderoth Lind & Ponack L, December 23, 2003: US06666784 (31 worldwide citation)

A piston rod position detecting mechanism is proposed which can detect continuously or in a multiple-point manner that the piston rod position has changed due to increase or decrease in the protruding amount of the piston rod due to aging. The protruding amount from a cylinder end wall is detected b ...


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Yasuyuki Tsuji, Motoharu Niki: Cage for spherical roller bearing. NTN Corporation, Armstrong Nikadio Marmelstein Kubovcik & Murray, July 23, 1991: US05033878 (29 worldwide citation)

A cage has a pair of annular bodies and a plurality of columns provided at equal spacings to couple the annular bodies together to receive spherical rollers therebetween. The columns have side faces each having both axial end portions thereof formed by a composite surface having a flat surface provi ...


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Hisashi Ohtsuki, Takayuki Norimatsu, Eiji Funahashi, Koji Kametaka, Motoharu Niki, Katsumi Sugiyama, Kenro Adachi: Wheel bearing and sealing device therefor. NTN Corporation, December 27, 2005: US06979001 (18 worldwide citation)

A wheel bearing includes a sealing device 5 positioned between inner and outer members 1 and 2. This sealing device 5 includes an elastic member 14, which eventually forms an encoder grid and is provided on a first annular sealing plate 11. A second annular sealing plate 12 is provided with sealing ...


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Eiji Tajima, Motoharu Niki: Wheel bearing unit. NTN Corporation, Arent Fox Kintner Plotkin & Kahn PLLC, December 3, 2002: US06488789 (15 worldwide citation)

A wheel bearing unit is provided in which the service life level is improved without making the size and weight of the bearing unduly large. The wheel bearing unit for rotatably supporting a car wheel on the body of a motor vehicle comprises a rotary member, an outer ring, and double rows of rolling ...


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Koji Sahashi, Motoharu Niki, Eiji Tajima, Akira Torii, Kazuhiko Hozumi, Keisuke Sone, Masahiro Ozawa, Nobuyoshi Yamashita, Yutaka Yamauchi, Masayuki Kuroda, Masuo Takaki: Wheel bearing apparatus. NTN Corporation, Arent Fox Kintner Plotkin & Kahn PLLC, December 10, 2002: US06491440 (13 worldwide citation)

A tire wheel bearing apparatus comprises an outer member having multi rows of track surfaces integrally provided on an inner periphery, an inner member having a tire wheel mounting flange provided at one end thereof, a cylindrical small diameter step portion provided at another end thereof and doubl ...


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Yoshio Kato, Motoharu Niki, Tsutomu Mizutani, Tadahisa Suzuki, Yoshiaki Suzuki, Masahiro Muranaka, Takahiro Koremoto, Masao Fukuwaka: Idler pulley. NTN Corporation, Nikaido Marmelstein Murray & Oram, March 10, 1998: US05725448 (11 worldwide citation)

This idler pulley includes a pulley body 1 made, e.g., by pressing a steel plate, and a ball bearing 2 fitted in the inner diameter of the pulley body 1. The contact position Z on the pulley peripheral surface 1a1 of the pulley body to be contacted by the belt center and the bearing centerline Y of ...


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Hisashi Ohtsuki, Motoharu Niki, Yasunori Terada, Nobuyoshi Yamashita: Axle bearing assembly and method of measuring bearing clearances. NTN Corporation, Nikaido Marmelstein Murray & Oram, April 15, 1997: US05620263 (10 worldwide citation)

The end surface 2c of the press-fit portion 2c of the axle 2 is machined with high precision to serve as a reference surface for measuring the negative bearing clearance upon completion of the assembly. The inner ring 3 is press-fitted on the press-fit portion 2c of the axle 2 and is fixed in positi ...


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Eiji Tajima, Shigeaki Fukushima, Akira Torii, Kazuhiro Azuma, Naoshi Kinpara, Hisashi Ohtsuki, Kazunari Yamamoto, Motoharu Niki, Masuo Takaki: Brake rotor and wheel bearing assembly. NTN Corporation, Wenderoth Lind & Ponack L, June 10, 2003: US06575637 (10 worldwide citation)

A reliable brake rotor and wheel bearing assembly are proposed which make unnecessary adjustment of runout of brake rotor at the customer's factory. For runout of each of the mounting surface and back of the brake rotor itself, and runout of the side of the wheel mounting flange of the inner me ...