Patents by Inventor Shizu Ishikawa
Shizu Ishikawa 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: 8038391Abstract: In the present invention, a partition wall which partitions a discharge port and a suction port provided on a static passage, in the rotating direction, has a discharge side shape which is identical with the shape of blades, and has a positional relationship in which the partition wall does not overlap with the discharge port in view of such a fact that the pressure variation on the suction side is higher than that of the discharge side, and noise on the suction side is dominant.Type: GrantFiled: June 3, 2008Date of Patent: October 18, 2011Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Shizu Ishikawa, Hiroshi Asabuki, Satoshi Takeda
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Patent number: 8033783Abstract: The present invention aims at providing a diagonal flow fan or a silencer for the diagonal flow fan, which have the same outer shape as a suction port and are compact, and can also obtain an effective sound absorbing effect of a moderate frequency range. In the diagonal flow fan comprising a diagonal flow impeller 1 disposed with a blade 1a so as to obliquely send an air to an axis of rotation 21, a fan casing 2 for covering this diagonal flow impeller 1, and a suction port 3 for sucking the fluid in the direction to the axis of rotation of this fan casing 2, the open front side of the suction port 3 is provided with a silencing portion comprising a shield 4 and a punching metal 5, so that the noise of the moderate frequency range of 500 to 1000 Hz generated in the diagonal flow fan was suppressed.Type: GrantFiled: August 7, 2007Date of Patent: October 11, 2011Assignee: Hitachi Industrial Equipment Systems Co., Ltd.Inventors: Shizu Ishikawa, Fumiaki Ishida
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Patent number: 7806649Abstract: A blower comprising: a vane wheel including a pair of grooves, and blades extending in a radial direction of the vane wheel in each groove, and a casing including stationary flow paths facing to the grooves respectively so that the gas urged in the grooves is capable of flowing in a circumferential direction in the stationary flow paths, a guide flow path extending in the axial directions to fluidly communicate with both of the stationary flow paths to enable the gas to flow from one of the stationary flow paths to the other one of the stationary flow paths, an inlet port for introducing the gas into the one of the stationary flow paths facing to the one of the grooves and an outlet port for discharging the gas out of the other one of the stationary flow paths facing to the other one of the grooves.Type: GrantFiled: November 25, 2008Date of Patent: October 5, 2010Assignee: Hitachi Industrial Equipment Systems Co., LtdInventors: Shizu Ishikawa, Fumiaki Ishida, Satoshi Takeda
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Publication number: 20090317235Abstract: In the present invention, a partition wall which partitions a discharge port and a suction port provided on a static passage, in the rotating direction, has a discharge side shape which is identical with the shape of blades, and has a positional relationship in which the partition wall does not overlap with the discharge port in view of such a fact that the pressure variation on the suction side is higher than that of the discharge side, and noise on the suction side is dominant.Type: ApplicationFiled: June 3, 2008Publication date: December 24, 2009Inventors: Shizu ISHIKAWA, Hiroshi Asabuki, Satoshi Takeda
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Publication number: 20090081021Abstract: A blower comprising: a vane wheel including a pair of grooves, and blades extending in a radial direction of the vane wheel in each groove, and a casing including stationary flow paths facing to the grooves respectively so that the gas urged in the grooves is capable of flowing in a circumferential direction in the stationary flow paths, a guide flow path extending in the axial directions to fluidly communicate with both of the stationary flow paths to enable the gas to flow from one of the stationary flow paths to the other one of the stationary flow paths, an inlet port for introducing the gas into the one of the stationary flow paths facing to the one of the grooves and an outlet port for discharging the gas out of the other one of the stationary flow paths facing to the other one of the grooves.Type: ApplicationFiled: November 25, 2008Publication date: March 26, 2009Inventors: Shizu Ishikawa, Fumiaki Ishida, Satoshi Takeda
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Patent number: 7470104Abstract: A blower comprising: a vane wheel including a pair of grooves, and blades extending in a radial direction of the vane wheel in each groove, and a casing including stationary flow paths facing to the grooves respectively so that the gas urged in the grooves is capable of flowing in a circumferential direction in the stationary flow paths, a guide flow path extending in the axial directions to fluidly communicate with both of the stationary flow paths to enable the gas to flow from one of the stationary flow paths to the other one of the stationary flow paths, an inlet port for introducing the gas into the one of the stationary flow paths facing to the one of the grooves and an outlet port for discharging the gas out of the other one of the stationary flow paths facing to the other one of the grooves.Type: GrantFiled: May 24, 2006Date of Patent: December 30, 2008Assignee: Hitachi Industrial Equipment Systems, Co. Ltd.Inventors: Shizu Ishikawa, Fumiaki Ishida, Satoshi Takeda
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Publication number: 20080152480Abstract: The present invention aims at providing a diagonal flow fan or a silencer for the diagonal flow fan, which have the same outer shape as a suction port and are compact, and can also obtain an effective sound absorbing effect of a moderate frequency range. In the diagonal flow fan comprising a diagonal flow impeller 1 disposed with a blade 1a so as to obliquely send an air to an axis of rotation 21, a fan casing 2 for covering this diagonal flow impeller 1, and a suction port 3 for sucking the fluid in the direction to the axis of rotation of this fan casing 2, the open front side of the suction port 3 is provided with a silencing portion comprising a shield 4 and a punching metal 5, so that the noise of the moderate frequency range of 500 to 1000 Hz generated in the diagonal flow fan was suppressed.Type: ApplicationFiled: August 7, 2007Publication date: June 26, 2008Inventors: Shizu Ishikawa, Fumiaki Ishida
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Publication number: 20060269394Abstract: A blower comprising: a vane wheel including a pair of grooves, and blades extending in a radial direction of the vane wheel in each groove, and a casing including stationary flow paths facing to the grooves respectively so that the gas urged in the grooves is capable of flowing in a circumferential direction in the stationary flow paths, a guide flow path extending in the axial directions to fluidly communicate with both of the stationary flow paths to enable the gas to flow from one of the stationary flow paths to the other one of the stationary flow paths, an inlet port for introducing the gas into the one of the stationary flow paths facing to the one of the grooves and an outlet port for discharging the gas out of the other one of the stationary flow paths facing to the other one of the grooves.Type: ApplicationFiled: May 24, 2006Publication date: November 30, 2006Inventors: Shizu Ishikawa, Fumiaki Ishida, Satoshi Takeda