Patents by Inventor Yoshihiro Nagaoka
Yoshihiro Nagaoka 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: 6364607Abstract: At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: GrantFiled: May 14, 2001Date of Patent: April 2, 2002Assignee: Hitachi, Ltd.Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida
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Patent number: 6312222Abstract: At a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: GrantFiled: March 23, 2000Date of Patent: November 6, 2001Assignee: Hitachi, Ltd.Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida
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Publication number: 20010036404Abstract: At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: ApplicationFiled: May 23, 2001Publication date: November 1, 2001Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida
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Publication number: 20010033792Abstract: At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: ApplicationFiled: May 14, 2001Publication date: October 25, 2001Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida
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Patent number: 6290460Abstract: At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating. shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: GrantFiled: August 11, 2000Date of Patent: September 18, 2001Assignee: Hitachi, Ltd.Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida
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Patent number: 6197255Abstract: A chemical analyzing apparatus comprises a reaction cell holder which holds a plurality of reaction cells that are supplied with samples and reagents at a predetermined position, a measurer for measuring characteristics of the sample, a plurality of reagent containers, a liquid deliverer provided below each of the plurality of reagent containers, one or more sound wave generators provided outside the reaction cells, and storage containers for storing cleansing liquid with different contamination states. The cleansing liquid with different contamination states is reused according to the contamination levels of the reaction cells.Type: GrantFiled: September 17, 1999Date of Patent: March 6, 2001Assignee: Hitachi, Ltd.Inventors: Ryo Miyake, Yoshihiro Nagaoka, Akira Koide, Naruo Watanabe, Yasuhiko Sasaki, Hajime Kato, Takao Terayama, Hiroshi Mitsumaki, Hiroyasu Uchida, Takeshi Shibuya, Yasuhiro Yoshimura
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Patent number: 6162015Abstract: A highly efficient centrifugal type fluid machine is configured so that the vane outlet angle or the vane outlet diameter at a side plate end (4a) of a single stage or a plurality of stages of a diffuser (D) is made larger than the vane outlet angle or the vane outlet diameter at a core plate end (4b), and the vane curve at a pressure surface end of a single stage or a plurality of stages of the diffuser (D) is formed to have the same radius of curvature at the side plate end (4a) and at the core plate end (4b), while the vane curve at a negative pressure surface end is formed to have a radius of curvature so that the vane thickness at the core plate end (4b) is larger than that at the side plate end (4a).Type: GrantFiled: September 10, 1997Date of Patent: December 19, 2000Assignee: Hitachi, Ltd.Inventors: Yuuji Nagai, Yoshiharu Ueyama, Setsuo Yazawa, Sadashi Tanaka, Yoshihiro Nagaoka
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Patent number: 6139266Abstract: At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: GrantFiled: September 16, 1999Date of Patent: October 31, 2000Assignee: Hitachi, Ltd.Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida
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Patent number: 5971705Abstract: At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: GrantFiled: October 28, 1998Date of Patent: October 26, 1999Assignee: Hitachi, Ltd.Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida
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Patent number: 5857834Abstract: At a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the leading edge of the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: GrantFiled: October 31, 1996Date of Patent: January 12, 1999Assignee: Hitachi, Ltd.Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida
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Patent number: 5595473Abstract: At a vaned diffuser or a volute casing of a centrifugal fluid machine, pressure pulsation and vibrating forces acting upon the diffuser or the volute casing are mitigated or cancelled so as to abate the noise from the centrifugal fluid machine. The fluid machine having an impeller 3 rotating about a rotating shaft 2 within a casing 1 and having a vaned diffuser 4 or volute 12 fixed to the casing 1 is constructed such that radius of the vane trailing edge of the impeller 3 and radius of the vane leading edge of the diffuser 4 or radius of the volute tongue is varied in the direction of axis of rotation and inclinations, on a meridional plane, of the vane trailing edge of the impeller 3 and the vane leading edge of the diffuser 4 or the volute tongue are set in the same orientation, thereby reduction in head and efficiency or occurrence of an axial thrust may be restrained to the extent possible to optimally abate the noise and pressure pulsation of the centrifugal fluid machine.Type: GrantFiled: October 17, 1994Date of Patent: January 21, 1997Assignee: Hitachi, Ltd.Inventors: Yoshihiro Nagaoka, Sadashi Tanaka, Yukiji Iwase, Michiaki Ida, Hirotoshi Ishimaru, Saburo Iwasaki, Yoshiharu Ueyama, Tetuya Yoshida